Transcriptome Signatures of Dysregulated Brain Dynamics Induce Entangled Network States.
Abstract
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Transcriptome Signatures of Dysregulated Brain Dynamics Induce Entangled Network States.Abstract
Marks of brain disorders may be visible through abnormal networks characterized by states with distinct signatures or connectivity patterns. Apart from neurodegenerations, drug abuse or eventually addiction may exert complex perturbative effects over human health, including damage to various organs and especially brain inflammation, volume shrinkage and functional deficits. These can also be regarded as signs of accelerated ageing, which involve multiple comorbidities associated with long-lasting cognitive impairme [...] 1623 8282 |
Palmitoylethanolamide for Neurological DisordersAbstract
Neurological tissue along with the cartilage remains one of the tissues that escapes human efforts of regeneration after injury. The human body, after an injury, can repair its tissues only to a certain extent that can help in recovering the function of organs. However, this is not the case in some organs, such as the brain and spinal cord. For a long time, basic medical science has been investigating the regeneration process that helps the human body, which is mainly through the pharmacological agents, proteins/ot [...] 1459 10217 |
Peripheral Nerve Dysfunction after Spinal Cord InjuryAbstract
Spinal cord injury (SCI) leads to an immediate loss of sensory and motor function below the level of injury mostly affecting people in the prime of life. In addition to the primary injury there is accumulating neurophysiological and histological evidence of dysfunction in the peripheral nerves, not related to direct damage from the primary injury, which exacerbates muscle wasting, and contributes to further functional loss and poor recovery. Among the potential contributing factors are systemic inflammation, and mo [...] 2002 14194 |
Celiac Disease and Associated Extraintestinal Manifestations, with Special Reference to Neurological Disordersby
Abstract
Celiac disease (CD), also known as gluten-sensitive enteropathy and nontropical sprue, is one of the most important entities of the wide spectrum of gluten-related disorders (GRDs). It is well known that neurological manifestations can be present either at the onset of CD, or appear during the development of the pathology, and the neurologic findings can show a profound difference. Clinical features show significant variation, ranging from typical manifestations of gastrointestinal involvement to several extraintes [...] 1591 10608 |
A Case of Coincidental Association of Amyotrophic Lateral Sclerosis in a Patient with Celiac Disease Consuming a Gluten-Free DietAbstract
We report, for the first time, the case of amyotrophic lateral sclerosis (ALS) onset in a 54-year-old woman not following a strict gluten-free diet (GFD) for six years after the diagnosis of celiac disease (CD). The patient did not display any sign of gluten toxicity, malabsorption, or CD-related comorbidity. Previous cases reported in medical literature showed ALS-like forms secondary to gluten intolerance, with symptom remission after a strict GFD. Even after correcting dietary flaws, the clinical manifestation o [...] 1651 10909 |
Voice and Speech Disorders in Alzheimer’s Disease: A State-of-the-Art ReviewAbstract
Alzheimer’s disease is the most common type of dementia in the world. This manuscript attempts to review the current knowledge of neurolaryngology and speech and language therapy in Alzheimer’s disease in order to distinguish it from other neurodegenerative diseases. Only a limited number of studies carried out on Alzheimer’s disease patients with speech or laryngeal disorders are found in the literature. Laryngeal (dysphonia, dysphagia, dry mucosa…) and speech symptoms (aphasic, rhythm alterations…) appear to exis [...] 1727 11442 |
Epigenetics of Sleep DisruptionAbstract
Sleep plays an important role in maintaining brain function, memory consolidation, hormonal balance, immune system function, growth, and repair. The physiological and psychological effects of disruptions in sleep highlight its importance in human health and wellness. Epigenetic roles are proposed in sleep, and circadian regulation, but only a limited number of studies have determined the mechanism that underlies the epigenetics of environmental factors interacting with the sleep, particularly the ones related to sl [...] 1596 18755 |
Exploring Potential Neurobiological Parallels of Restrictive Behaviour: Anorexia Nervosa and Chew and Spit (CHSP)Abstract
Consensus for where along the eating disorder spectrum the pathological eating behaviour of Chew and Spit (CHSP) falls has been a point of contention in academic literature. Using the case of Mary1, a 30 year old female from Australia who has engaged in excessive restrictive behaviour, was diagnosed with anorexia nervosa (AN) and has been engaging in Chew and Spit (CHSP) behaviour for over 10 years, the current paper examines the similarities from a neurobiological perspective between restrictive behaviours (akin w [...] 1763 10902 |
Neurostimulation Approaches in the Treatment of Severe Anorexia Nervosaby
Abstract
Psychiatry is seeking interventions that could reliably sustain weight gain and psychosomatic recovery of patients with severe anorexia nervosa (AN). Currently, patients with AN, even after receiving individually-tailored therapeutic interventions, often relapse following marginal weight restoration. Also, the evidence regarding the effectiveness of psychotropic medications in relieving and treating AN symptomology is limited. The research in the field is aiming to mitigate shortcomings associated with common pract [...] 1847 12868 |
Neonatal Hypoxic Ischemic Encephalopathy: An Updated Preclinical and Clinical ReviewAbstract
Hypoxic-ischemic encephalopathy is a major cause of death and disability in the newborn period. Experimental models have demonstrated that brain injury in hypoxic-ischemic encephalopathy occurs in two phases: primary energy failure and secondary energy failure. In primary energy failure, there is a cessation of oxidative metabolism and irreversible neuronal injury, followed by secondary energy failure due to glutamate release, elevation of intracellular calcium, reactive oxygen species formation, apoptotic cell dea [...] 2330 25216 |
Behavioral Disorders and Celiac Disease: Coincidence or Casualty?Abstract
This paper presents the case of a child diagnosed with both celiac disease and Asperger’s syndrome. The literature does not report this association to date, and the authors believe it to be a coincidence rather than a casualty. 1632 12043 |
Neurological Manifestations of the Celiac Disease in ChildrenAbstract
Gluten-related disorders (GRDs) represent a spectrum of diverse clinical manifestations triggered by the ingestion of gluten in genetically susceptible individuals. The most common and widely recognized diseases within this spectrum are celiac disease and non-celiac gluten sensitivity. The clinical manifestations are intestinal, but extraintestinal manifestations may also appear, such as neurological or psychiatric.
This work will specifically review the neurological or psychiatric manifestations that are more freq [...] 1744 15993 |
Neurological Manifestations of Celiac Disease and Non-Celiac Gluten Sensitivity and the Effect of a Gluten Free Dietby
Abstract
Celiac disease (CeD) is an immune-mediated enteropathy triggered by gluten ingestion and affects nearly 1% of the population worldwide. CeD has typically been associated with gastrointestinal symptoms such as diarrhea and abdominal pain; however, its extra-intestinal manifestations are becoming widely recognized. In particular, CeD patients may present with various neurological manifestations and oftentimes, without evidence of gastrointestinal symptoms. The pathophysiology behind these manifestations is not well k [...] 1770 20540 |
Prone Anesthesia for a Super-Super Morbidly Obese Patient Undergoing Neurosurgery: A Case Reportby
Abstract
Obesity is on the rise around the world, carrying along with it a wide range of comorbidities and complications. We report on a super-super morbidly obese 43-year-old female, with a body mass index (BMI) of 77.85 kg/m2 (173cm, 233kg), who presented for a scheduled suboccipital craniectomy with C-1 laminectomy secondary to symptoms from an Arnold-Chiari type-I malformation. Already a challenging type of surgery, due to the patient’s extreme BMI and positioning, the surgery became more difficult. There are many [...] 1702 14472 |
Synaptic Plasticity and Learning Processes: A Neuroeducation PerspectiveAbstract
The story of each individual is essentially the story of their learning processes and relationships from the moment they were born. Indeed, the story of learning processes is merely a constant stratification of experiences based on biological and neurofunctional features that are influenced by genetic and cultural factors and subject to environmental stimuli constantly reshaping their behaviour.Neuroscientific studies conducted over the past decades have highlighted a unique feature of the human nervous system, cal [...] 1689 12427 |
Neuroprotective Strategies in Glaucoma - Translation to Clinical TrialsAbstract
Neuroprotection in glaucoma is any medical treatment by which decline in visual function can be slowed or prevented by supporting the health and survival of neural cells, independent of lowering of intraocular pressure (IOP). This is achieved by targeting mechanisms to inhibit or delay retinal ganglion cell death and promote cell survival pathways. Despite demonstrating promising results in preclinical trials, many neuroprotective strategies have failed to show success in subsequent clinical trials. Of the clinical [...] 1886 18616 |
Non-linear Dynamics and Chaotic Trajectories in Brain-Mind Visual Experiences during Dreams, Meditation, and Non-Ordinary Brain Activity Statesby
Abstract
The present report discusses brain visual experiences in conditions of low degree of openness of the brain toward the environment, for example, while dreaming, during meditation, or in non-ordinary brain activity states such as under the effects of psychoactive substances, in the state of coma, or in other states of reduced sensory perception, among others. In the present report, for brevity, such states are referred to as brain-mind visual experiences, implying that such a visual activity is not one connected to t [...] 1672 12691 |
Increased Diurnal Salivary Cortisol and Morning Serum Triglycerides and Decreased Apo A1 Concentrations in Children and Adolescents with Clinical Depressionby
Abstract
Data available on possible associations of lipids, steroid levels, and depression are conflicting. This study investigated their possible associations in a sample of youth with depression. Ninety-eight youth with depression and individually matched healthy volunteers on the basis of age and sex were enrolled for the study. The two groups had nearly similar body mass index. After fasting overnight, they underwent blood sampling for triglycerides (TG), total cholesterol, low-density lipoprotein, high-density lipoprot [...] 1286 9521 |
Dynamic Functional Connectivity Fading Analysis and Classification of Alzheimer’s Disease, Mild Cognitive Impairment and Normal Control Subjects based on Resting-State fMRI DataAbstract
In this paper, motivated by the fading effect in wireless communications, where severe channel fading is related to information loss during the transmission, we evaluate and analyze the fading effect in time-varying functional connectivity of AD, MCI and NC subjects based on the resting-state fMRI data, and then apply that for AD, MCI, NC classification. We show that in some critical brain regions, compared with NC subjects, AD subjects suffer more severe and long lasting fading in the functional connectivity level [...] 1511 10695 |
Insights into Brain Signal Transduction can Provide Potential Molecular Targets to Approach and Manage Alzheimer’s DiseaseAbstract
Mechanisms leading to neuronal cell death in human pathology are far from being fully delineated. Understanding the molecules involved in neuronal death and the timing of their recruitment might help to explain the natural history of degenerative processes, including the morphological abnormalities observed in Alzheimer’s disease (AD). Moreover, it might help refine the diagnosis by defining new molecular markers as well as find effective therapies, especially for slow cognitive deficits, often associated wit [...] 1815 10967 |
Neuroplasticity and Central Sensitization in Orofacial Pain and TMDAbstract
Temporomandibular disorders (TMD) are a group of musculoskeletal and neuromuscular conditions that involve the temporomandibular joint (TMJ), the masticatory muscles, and branches of the trigeminal nerve. TMD is the most common chronic oral facial pain disorder. Pain associated with TMD can be clinically expressed as myogenous or arthrogenous in etiology. The myogenous variant of TMD is characterized by pain in the muscles of mastication. The arthrogenous form of TMD is caused by pain in the joint leading to synovi [...] 1966 19128 |
From Light to Sound: Photoacoustic and Ultrasound Imaging in Fundamental Research of Alzheimer’s DiseaseAbstract
Alzheimer’s disease (AD) causes severe cognitive dysfunction and has long been studied for the underlining physiological and pathological mechanisms. Several biomedical imaging modalities have been applied, including MRI, PET, and high-resolution optical microscopy, for research purposes. However, there is still a strong need for imaging tools that can provide high spatiotemporal resolutions with relatively deep penetration to enhance our understanding of AD pathology and monitor treatment progress in fundamental r [...] 2236 14652 |
Neurochemical System Involved in Anorexia NervosaAbstract
Anorexia nervosa is a psychiatric disorder, the etiopathogenesis of which is still not fully understood. Currently, the most accredited model is a multifactorial model, which involves interaction between predisposing factors of biological nature, partly genetically determined, and psychological/personological and environmental socio-cultural factors. The last 20 years have led to the advancement in our knowledge on the mechanisms of energy homeostasis maintenance. There has been a veritable explosion of studies aim [...] 1274 11417 |
Catatonia Following Cessation of Topiramate in a Patient with Prader-Willi Syndrome: Case Report and Review of Literatureby
Abstract
Case studies have associated catatonia with withdrawal from benzodiazepines and clozapine, both of which have been shown to increase GABA activity. Long-term use of GABAergic medications could result in GABAA downregulation and sudden discontinuation of the GABAergic drug could lead to a GABA hypoactive state which could predispose the patient to catatonia. The anticonvulsant topiramate, is known to increase brain GABA activity. Prader-Willi syndrome (PWS) is a genetic imprinting disorder characterized by lack of e [...] 1380 10312 |
Dopaminergic Activity and Exercise Behavior in Anorexia NervosaAbstract
Driven exercise (i.e., the tendency to exercise in excess to influence weight/shape or regulate emotion) is difficult to manage in the context of anorexia nervosa, and is associated with poorer treatment outcomes, and psychological and medical severity. Driven exercise is observed in a considerable number of those diagnosed with anorexia nervosa; however, to date, this hallmark symptom remains poorly understood. Dopamine signaling is implicated in motivating and maintaining appetitive behavior among patients with e [...] 1893 14405 |
The Effects of Subjective and Objective Sleep Monitoring on Sleep Patterns and AttitudesAbstract
Self-reports and actigraphy are common methods of sleep monitoring. Portable polysomnography (p-PSG) may serve as a screening tool in natural environments. Common concerns with its use are that sleep and compliance might be affected. Further, dysfunctional beliefs of the subjects may contribute to sleep disturbances, which might manifest throughout sleep monitoring. This study examined the effect of monitoring sleep patterns and attitudes among healthy individuals. Sixty-eight physically active university students [...] 1782 11333 |
Neuroscience and its Contribution to Neuroeducation for Individuals with Autism Spectrum Disorderby
Abstract
With an increasing prevalence of children with Autism Spectrum Disorder (ASD) in schools, teachers are in need of different effective ways to educate these individuals who have distinctly different needs and modalities of experience. One area that has been explored is neuroeducation, or using findings from neuroscientific research to inform classroom practice. Neuroscientific findings appear to center on two main themes of neurological differences among children with ASD: sensory processing and emotional processing [...] 1549 12517 |
Faster and More Accurate Identification of Male Faces in Female Care Home ResidentsAbstract
We investigated whether healthy older adults who live in female-dominated old age care homes can identify the gender of male and female faces of people from different ethnicities in the same way as young adults. We hypothesized that this mainly female environment would lead by exposure to a female-gender bias. A sample of 40 participants aged 20-30 and 70-80 years identified the sex-of-face of 120 images of young and old adults, male and female faces, black and white faces, presented in a randomized sequence in a s [...] 1787 11243 |
Sleep Dysfunction in Fibromyalgia and Therapeutic Approach Optionsby
Abstract
Fibromyalgia, characterised by persistent pain, sleep disturbance, fatigue and cognitive dysfunction, is a central sensitivity syndrome that also involves abnormality in peripheral generators and in the hypothalamic pituitary adrenal axis. Heterogeneity of clinical expression of fibromyalgia with a multifactorial aetiology has made the development of effective therapeutic strategies challenging. Non-restorative sleep associated with poor sleep quality is a characteristic of fibromyalgia which is linked to symptom s [...] 1928 28517 |
Psychotropics and Neuroprotection: Literature Review and Case Series Reportby
Abstract
Agitation is a common manifestation of acute brain injury. When not addressed, agitation can lead to slower recovery rates, including delayed admission to acute rehabilitation programs. Antipsychotics are commonly used to control agitation in acute brain injury in the ICU. However, there is no current consensus on the most "efficacious and safest strategy" for use of antipsychotics in acute TBI. Haloperidol is arguably the commonly used antipsychotic for agitation in ICU setting at present. Interestingly, there are [...] 1460 12435 |
Exploring Quality of Sleep, Perceived Stress and Resilience in Cancer Survivorship: A Feasibility Study of Mindfulness in MotionAbstract
Background: The global principles of Mindfulness-Based Stress Reduction (MBSR) have led to the creation of Mindfulness-Based Interventions (MBIs), which are interventions that retrain the mind to modify its usual stress response to increase coping and resilience. Mindfulness in Motion (MIM) is an MBI that has shown significant biologic and positive psychosocial outcomes with adult working populations, but had not previously been tested in oncology populations and their caregivers. Utilizing MIM to improve sleep qua [...] 1865 13327 |
Alzheimer’s Disease: Is a Dysfunctional Mevalonate Biosynthetic Pathway the Master-Inducer of Deleterious Changes in Cell Physiology?by
Abstract
There is a growing awareness that the proteins—amyloid-beta (Aβ) and tau—do not cause Alzheimer’s disease (AD) but are produced as a result of it. Similarly, doubt reigns over the degree of causality of high plasma cholesterol and prenylation in AD. This review proposes a fresh and important perspective, in addition to the current line of thinking. It emerges from comparative analysis, in evolutionary retrospect, of the characteristics of the mevalonate biosynthetic pathways in insects versus [...] 2670 17724 |
Relationship between Brain Injury and Clinical Biomarkers in Hypoxic-Ischemic Newborn Pigletsby
Abstract
Background: The newborn affected by severe hypoxic-ischemic brain injury usually end up dying, and those who survive suffer neurodevelopmental handicaps. Biomarkers are required to identify the hypoxic-ischemic insult in order to determine the early rescue treatment method to be followed. The aim of the present study was to correlate relevant biomarkers to the pathophysiological process of hypoxic-ischemic brain injury at 6 h and 72 h in newborn piglets.
Methods:Hypoxia-ischemia was induced in the piglets by clampi [...] 1137 9384 |
The Relationship between Sleep Quality and Eating Competence in A Sample of Canadian Post-Secondary StudentsAbstract
Background: Post-secondary students are at increased risk for sleep problems and poor eating behaviours that overtime may lead to negative health outcomes later in life. However, limited research has examined associations of sleep quality with eating behaviours and eating competence (e.g., being positive, flexible, and comfortable with eating and getting enough enjoyable and nutritious foods) among Canadian post-secondary students.
Methods: Using a cross-sectional study design, participants completed an online surv [...] 1641 10201 |
Acute Exercise on Reversal Learningby
Abstract
Objective: Reversal learning requires an individual to alter their behavior when previously learned reward-based contingencies are reversed. Reversal learning is heavily influenced by cognitive flexibility, which has been shown to be enhanced with acute exercise. However, minimal work has directly evaluated the effects of acute exercise on reversal learning, which was the purpose of this experiment.
Methods: A between-subject randomized controlled intervention was employed. Participants (N=60) were randomized into [...] 1290 9002 |
Transcranial Magnetic Stimulation: A Tool for Quantifying Neurophysiological Changes in the Brain Following Concussion Injury in SportsAbstract
Background: Sport-related concussion is a growing public health concern. Defined as a injury that disturbs neurological functions, concussion is characterised by a constellation of signs and symptoms. However, clinical imaging methods do not reveal any structural damage. Recently, neurophysiological techniques such as single and paired-pulse transcranial magnetic stimulation (TMS) are being applied to quantify neurophysiological changes (specifically corticospinal and intracortical excitation and intracortical inhi [...] 1671 10964 |
The End Effector of Ischemic Tolerance Present in Blood Plasma from Double Conditioned Donors Ameliorates Trimethyltin Provoked Damage in BrainAbstract
Background: Many experiments have been done to demonstrate robust ischemic tolerance efficiency using mostly young and healthy animals. However, the translation of these results to usually elderly and sick patients moreover taking many various medicines has to date been disappointing. 3-Methyltin (TMT) poisoning and short-term transient cerebral ischemia cause similar damage, especially, to selectively vulnerable brain regions such as hippocampal CA1 and CA3.
Methods: Using dual conditioning, we activated the full [...] 1531 8550 |
Delaying Dementia: Targeted Brain Delivery Using Lipid Cubic PhasesAbstract
Microvascular endothelial dysfunction precedes, often by decades, the cognitive decline associated with Alzheimer's disease. Hence, preservation of a healthy cerebrovascular endothelium can be an important therapeutic target. By incorporating appropriate drug(s) into biomimetic (lipid cubic phase) nanocarriers, one obtains a multitasking combination therapeutic which targets certain cell-surface scavenger receptors, mainly class B type I (i.e., SR-BI), and crosses the blood-brain barrier. Documented similarities in [...] 1432 8722 |
Impact of Case Management on HIV Patients’ Linkage to Care and Their Clinical Outcome: A Systematic Review of Randomized Clinical Trialsby
Abstract
Objectives: The purpose of this systematic literature review is to investigate the impact of case management on the link between HIV/AIDS patients (HIV-infected persons) and HIV treatment, and to investigate the impact of case management on their morbidity and mortality.
Methods: We searched PubMed, Current Contents, Scopus, EMBASE, MEDLINE, the Effect Review Summary Database and the ACP Journal Club until May 2018. A randomized clinical trial examined the impact of case management on the association of PLHA with c [...] 1795 10968 |
Hyperglycemia-Induced Brain Injury in Preterm InfantsAbstract
Hyperglycemia soon after birth is common in extremely preterm infants. Hyperglycemia is associated with severe intraventricular hemorrhage and impaired neurodevelopmental outcome in these infants. Recent data in human infants and animal models demonstrate that hyperglycemia leads to decreased white matter content, abnormal synaptogenesis, microgliosis, and functional deficits in the absence of intraventricular hemorrhage. Data suggest that oxidative stress, inflammation, and abnormal substrate metabolism are respon [...] 1740 12921 |
Extra Corporeal Life Support in Traumatic Brain Injury PatientsAbstract
Purpose of review: The purpose of this review is to describe recent evidence regarding the use of Extracorporeal Membrane Oxygenation (ECMO) as rescue therapy for refractory cardiac or respiratory failure in patients with traumatic brain injury (TBI) when conventional treatments have failed. The characteristics of these patients, including the risk of bleeding and developing malignant intracranial hypertension, are generally considered as relative contraindications to ECMO treatment; however, recent evidence sugges [...] 1858 10452 |
Characterisation of Oxidative Stress, DNA Damage and Inflammation in a Cellular Model of Parkinson’s Diseaseby
Abstract
Background: Parkinson's disease (PD) is the second most common neurodegenerative disease and is a synucleinopathy due to the critical role of α-synuclein (α-Syn) in its pathology. α-Syn is able to translocate from the cytoplasm to the nucleus and cause DNA damage.
Methods: SH-SY5Y cells were stably transfected with plasmids containing wild type (WT) α-Syn and A53T mutant α-Syn as fusion proteins with EGFP and an EGFP only control vector. The cells were differentiated using retinoi [...] 1731 12061 |
The Role of Periostin in Brain Injury Caused by Subarachnoid HemorrhageAbstract
Aneurysmal subarachnoid hemorrhage (aSAH) causes serious brain injury, and its mechanisms have not been completely unraveled so far. The causative factors for the brain injury initiated by an aneurysm rupture, which is referred to as the early brain injury (EBI), include elevated intracranial pressure, cerebral hypoperfusion, and blood contents that are directly exposed to the brain surface. At Day 4–14 post aSAH, delayed cerebral ischemia (DCI) often develops, which may worsen the neurological outcomes critically. [...] 1594 11179 |
Short Sleep in Pupils in Japan: Current Status and Associated Factorsby
Abstract
Background: Several recommendations on optimum sleep duration have been published for adolescents to secure a healthy life. This study aimed to compare the sleep duration of middle and high school pupils in Japan with the recommended values and determined the factors associated with the duration of sleep among them.
Methods: A total of 1766 completed questionnaires were obtained from grades 7 to 12 pupils in Japan. The questionnaire addressed the following points: sleeping, eating, defecation, physical activity, sc [...] 1415 14708 |
Melatonin Aggravated Oxaliplatin-Mimicking Sinusoidal Obstruction Syndrome: Role of Platelet Aggregation and Oxidative StressAbstract
Background: Sinusoidal obstruction syndrome is caused by an injury to the liver induced either by accidental ingestion of pyrrolizidine alkaloid monocrotaline or by chemotherapeutic drug oxaliplatin used for the treatment of colorectal cancer. Sinusoidal obstruction syndrome is characterized by rounding and swelling of the sinusoidal endothelial cell, which leads to obstruction of blood vessels, leukocyte infiltration, and oxidative stress. Melatonin, a powerful antioxidant, prevents acute liver injury. We investig [...] 1529 47147 |
Daytime Sleepiness and the Well-Being and Academic Attainment of University Students in the UKby
Abstract
Background: Previous research suggests that insufficient daily sleep has negative effects on both well-being and academic attainment. Much of the research in this field has focused on adolescents and children rather than university students in the UK.
Methods: The present study used the Student Well-Being Process Questionnaire and independent sleep questions to measure subjective well-being and levels of sleep in a student sample (N=345) who completed the survey online. Academic attainment was measured with exam an [...] 1674 11403 |
Autonomic Function Correlates with Microflora Compositions in a Small Cohort of Patients with Autism Spectrum Disorder: Preliminary Clinical Data and DiscussionAbstract
Background: Research into the effects of microflora on health and in disease has increased recently. Such enthusiasm seems well placed. Should the preliminary studies translate through the larger, more powerful studies, the medical community may well have an entirely new platform from which to intervene for health and against disease.
Methods: Delineating the pathways involved in the microflora and host interaction is likely to yield further avenues for intervention. Here we examine autonomic function and correlate [...] 1741 7872 |
A Neurotransmitter Approach to the Trolley ProblemAbstract
Is it ethically permissible to sacrifice the life of one human being in order to save the lives of five others? This question forms the basis of the famous thought experiment called “the trolley problem.” Surveys have found that 90 percent of people agree it is permissible when the victim to be sacrificed is described as off in the distance, whereas the opposite result occurs if the victim is described as up close. No consistent ethical principle has been identified that account for these results. In this paper we [...] 2023 15623 |
Sleep and Help Seeking Behaviours in Australia: A Narrative ReviewAbstract
Inadequate sleep is a largely under recognised problem in Australia despite researchers consistently highlighting it as a key component of health and wellbeing. Over a third of Australian adults now experience some form of inadequate sleep, which is consistently linked to a range of accompanying physical and mental health concerns. In addition to the health burden on the individual, the associated financial burden incurred by the community is extremely high with inadequate sleep costing over 66.3 billion annually i [...] 1361 11505 |
Changes in SPECT Brain Imaging in Pediatric Patients with Suspected Neuroborreliosis: A Series of 6 CasesAbstract
Lyme disease is a spirochetal illness transmitted primarily through the bite of ticks. The disease has a broad spectrum of comorbid conditions including osteoarticular, cardiovascular, and neurological involvement. In addition, clinical variability depends on the age of affected individuals.
The Center for Disease Control recognizes the disease as an epidemic and mentions it to be a major morbidity burden in our environment because of the frequent lack of diagnosis and early treatment. Scientific literature mention [...] 1255 8771 |
Connections between Early-Life Neuroinflammation, Neural Stem Cells and Progenitors and Origins of Neuropsychiatric DisordersAbstract
A number of studies have highlighted the connection between infections during pregnancy in mothers and increased risk for neuropsychiatric disorders later in life leading to the view that maternal immune activation is a significant contributor to psychiatric illnesses. Meta-analyses have revealed associations between the incidence of premature birth and perinatal inflammation with smaller total brain volumes, cognitive, motor and behavioral deficits in childhood and adolescents. In animal studies where inflammati [...] 1644 12149 |
The Effects of Exercise on Long-Term Potentiation: A Candidate Mechanism of the Exercise-Memory RelationshipAbstract
Objective: The objective of this paper was to evaluate the extent to which exercise may influence long-term potentiation (LTP), a key cellular correlate of episodic memory function.
Methods: Studies were identified using electronic databases, including PubMed, PsychInfo, Sports Discus and Google Scholar.
Results: The computerized searches revealed 20 articles meeting the study criteria. Among these 20 evaluated articles, 17 were conducted in an animal model and 3 among humans. All 17 of these studies, with the exce [...] 2241 19720 |
Gluten-Free Diet for the Treatment of ADHD; Pilot Studyby
Abstract
Background: The association between Attention Deficit Hyperactivity Disorder (ADHD) and celiac disease has already been established. Non-celiac gluten sensitivity (NCGS), as well as celiac disease, has been associated with neuro-psychiatric disorders. Our objective is to assess if a proportion of pediatric ADHD patients are affected by NCGS and could consequently benefit from a gluten-free diet. Methods: Pilot study of 6 ADHD patients. Personal or family history suggestive of NCGS was investigated. The Conners Cont [...] 2071 25170 |
Ischemic Brain Injury and Regulatory T CellsAbstract
Inflammation and immune responses after stroke, including ischemic cerebral infarction, play pivotal roles in the pathology, resolution of inflammation, and neurological recovery. Regulatory T (Treg) cells are the cells responsible for immune tolerance, usually activated by secondary lymphatic tissues, which subsequently regulate effector T cell activation and dendritic cell activation. Recently, Tregs that are present in tissues, called tissue Tregs, have been shown to exhibit tissue-specific functions in addition [...] 1634 12171 |
Diffuse Intrinsic Pontine Glioma: Translation of Genomic Knowledge to Clinical PracticeAbstract
Pediatric brain tumors account for approximately 25% of all cancers in children and are currently the leading cause of cancer-related deaths in the pediatric population with an estimated incidence of 5.14 cases per 100,000 person years [1]. Up to 10-15% of all pediatric brain tumors arise in the brainstem, with the majority of these classified as the diffuse intrinsic pontine glioma (DIPG) subtype [2]. The outcome of children with DIPG remains dismal with a median survival of <1 year. Owing to the unique locatio [...] 1569 11409 |
Sporadic and Hereditary Hemangioblastoma: The Role of Endothelial Cellsby
Abstract
Hemangioblastomas (HBs) are benign, highly vascularized tumors of the central nervous system. Approximately 75% of HBs are sporadic, while 25% are associated with von Hippel–Lindau (VHL) disease. HBs consist of two main components: a rich capillary network composed of vascular endothelia and pericytes, within large vacuolated stromal cells, which harbor the genetic defect. The mechanism by which the VHL gene product (pVHL) causes HB is not completely clear. Wild-type pVHL is involved in the response to hypoxia, tar [...] 1459 10064 |
Magnetic Resonance Imaging Approaches for Predicting the Response to Hyperoxic Radiotherapy in Glioma-Bearing RatsAbstract
Background: Despite important advances in multimodal therapeutic options, glioblastoma (GBM), the most frequent and aggressive form of all astrocytomas, remains with a median overall survival period of 15 months. A direct correlation between GBM hypoxia and higher aggressiveness, poor prognosis and greater resistance to different treatments has been established. However, because of intratumoral and interindividual heterogeneity, it has not been possible to assess accurately the hypoxia degree from physiopathologica [...] 1578 10484 |
Correlation of CT and MR Perfusion and Permeability Parameters for Intracranial TumorsAbstract
Background: Perfusion imaging, mainly MR perfusion (MRP), is performed frequently for brain tumor imaging. CT perfusion (CTP) is less studied as a method for characterizing brain tumors. The purpose of this study was to demonstrate the usefulness of CTP perfusion parameters in evaluating brain tumors and to compare it with MRP measures in the same patient population. Methods: Patients underwent CTP and MRP imaging prospectively. Images were processed with vendor-provided and vendor-neutral software. Four regions of [...] 1656 9269 |
Cerebellopontine Angle Glioblastoma with Concurrent Spinal Cord Involvement: A Case Report and Review of LiteratureAbstract
Objective: To report a unique case of cerebellopontine angle glioblastoma with concurrent spinal cord involvement. Background: Glioblastoma (GBM) is the most common primary malignancy of the central nervous system (CNS), comprising 46.6% of all CNS malignancies. By anatomic location, cerebellopontine angle (CPA) GBMs are exceedingly rare. To our knowledge, the following case represents the tenth reported case of CPA GBM and the first with a corresponding spinal cord tumor on presentation. Methods: Retrospective cha [...] 1373 10285 |
Sleep Disorders in Children with Central Nervous System TumorsAbstract
Sleep complaints are common in pediatric patients with central nervous system (CNS) tumors. These problems may result from disruption of normal homeostatic, circadian, neuroendocrine, and cardiorespiratory pathways and vary by tumor location and treatment received. Children with tumors within the hypothalamus and surrounding regions are prone to excessive daytime sleepiness. Sleep-related breathing disorders, especially those involving abnormal control of breathing, may occur in patients with tumors of the brainste [...] 1412 12019 |
TTF-1-Expressing Supratentorial Embryonal Tumors (PNET): A Clinicopathologic Study of Two Cases and Literature Review of TTF-1-Positive Primary Brain Tumorsby
Abstract
Thyroid transcription factor 1 (TTF-1) is a nuclear polypeptide and a tissue-restricted member of the homeobox protein family that, when attached to DNA, plays a crucial role in regulating the expression of select genes during early embryonic development of the thyroid, lung, and brain. As often happens, the initial enthusiasm for the diagnostic value of TTF-1 as a selective immunohistochemical marker of lung and thyroid tumors began to dwindle, due to its detection in tumors arising from other organs. TTF-1-expres [...] 1623 14391 |
A Case Series of Temozolomide in the Management of Refractory ProlactinomasAbstract
Objective: To report three cases of refractory prolactinomas treated with Temozolomide (TMZ). Background: Prolactinomas account for 40% of pituitary adenomas. Dopamine agonists (DA) are the first line of treatment followed by surgical resection and radiation. TMZ is an oral chemotherapeutic agent used in gliomas, which has been given to patients with prolactinomas refractory to conventional treatments. Methods: Retrospective chart review was conducted for refractory prolactinoma patients treated between 2008 and 20 [...] 1744 10693 |
Isolated Diffusion Restriction Preceding Contrast Enhancement in Glioblastoma Multiforme is Associated with Short-Term SurvivalAbstract
(1) Background: Current imaging standard for detecting and assessing glioblastoma multiforme (GBM) progression depends on contrast-enhancement on brain magnetic resonance imaging (MRI). Isolated foci of diffusion restriction have been observed to precede enhancement in GBM. The aim of our study was to investigate the frequency of isolated diffusion restriction that precede corresponding enhancement and to investigate the association between isolated diffusion restriction and survival in patients with GBM. (2) Metho [...] 1429 11455 |
Craniopharyngiomas: An Appropriate Surgical Treatment based on Topographical and Pathological Conceptsby
Abstract
The optimal treatment of craniopharyngiomas (CPs) represents a neurosurgical challenge, the major reason being their close relationship with the hypothalamus and the third ventricle (3V) boundaries. Nevertheless, CPs are generally defined as “suprasellar” lesions, an inexplicit and frequently defective term. Despite being heterogeneous lesions, CPs are actually characterized by repeating pathological patterns which depend on their point of origin along the pituitary-hypothalamic axis. Surgical plan in tailoring the [...] 2020 18426 |
Contribution of PET Imaging to Clinical Management of GliomasAbstract
Gliomas originating from glial cells comprise about 30% of all primary central nervous system tumors and 80% of malignant brain tumors. Gliomas differ in their biological activity and are categorized according to grades, from benign to malignant with high recurrence rates. For diagnosis, location and extent of the tumor is assessed by CT and MRI, but for grading, additional parameters are necessary: contrast enhanced CT and MRI reveal damage of the blood–brain barrier, perfusion-weighted MRI shows regional blood su [...] 1219 9948 |
Haplo-Insufficiency or Knockout of the Serotonin Transporter Does not Affect Heroin Self-Administration but Decreases BDNF in the Frontal CortexAbstract
(1) Background: Drug addiction places a heavy burden on those affected by it but only a small percentage of individuals (~20%), regardless of their drug of abuse, go on to develop the compulsive behaviours that define drug addiction. Clinical studies have shown that genetic variations that reduce serotonin transporter (SERT) activity increase the vulnerability to developing a variety of psychiatric disorders such as depression, anxiety and drug addiction. (2) Methods: To investigate the influence of reduced SERT fu [...] 1339 8092 |
Temporal Lobe Epilepsy, Stroke, and Traumatic Brain Injury: Mechanisms of Hyperpolarized, Depolarized, and Flow-Through Ion Channels Utilized as Tri-Coordinate Biomarkers of Electrophysiologic Dysfunctionby
Abstract
The brain is an integrated network of multiple variables that when compromised create a diseased state. The neuropathology of temporal lobe epilepsy (TLE), stroke, and traumatic brain injury (TBI) demonstrate both similarity and complexity that reflects this integrated variability; TLE with its live human tissue resection provides opportunity for translational science to demonstrate scale equivalent experimentation between the macroscopic world of clinical disease and the microscopic world of basic science. The ext [...] 2364 13052 |
Mitochondria, Brain, Heart and Bodyby
Abstract
More and more studies revealed links amongst neurological disorders, heart diseases and cancers. For example, people with subclinical cardiovascular diseases are at higher risk for Alzheimer's disease, Parkinson’s disease is associated with varied risk of cancer, Autism Spectrum Disorders and cancer have overlapping genes and molecular pathways, heart disease and cancer share common risk factors, etc. It is intriguing how are these conditions that appear to be completely different linked together. 1312 7380 |
Perspective on Neurobiological and Clinical Early Indicators of Mild Cognitive Decline and Alzheimer’s Diseaseby
Abstract
There is a need for early diagnosis, monitoring and treatment of Alzheimer’s Disease (AD) and Mild Cognitive Impairment (MCI). Traditional assessments of cognitive decline have been found to lack sensitivity and accuracy in differentiating varying stages of Dementia and cognitive decline as well as being time consuming in their administration. Key components of cognition namely memory and executive function have been identified as most predicative of AD status. Brief cognitive screening tools such as the Montreal C [...] 1589 8626 |
Perspectives on the Role of Endocannabinoids in Autism Spectrum Disordersby
Abstract
Autism spectrum disorders (ASDs) are diagnosed on the basis of three behavioral features, namely, (1) deficits in social communication, (2) absence or delay in language and (3) stereotypy. The consensus regarding the neurological pathogenesis of ASDs is aberrant synaptogenesis and synapse function. Further, it is now widely accepted that ASD is neurodevelopmental in nature, placing emphasis on derangements occurring at the level of intra- and intercellular signaling during corticogenesis. At present, there is an ev [...] 1335 8839 |
A Neurodevelopmental Perspective for Autism-Associated Gene FunctionAbstract
Large-scale genetic sequencing studies have identified a wealth of genes in which mutations are associated with autism spectrum disorder (ASD). Understanding the biological function of these genes sheds light onto the neurodevelopmental basis of ASD. To this end, we defined functional categories representing brain development – (1) Cell Division and Survival, (2) Cell Migration and Differentiation, (3) Neuronal Morphological Elaboration, (4) Development and Regulation of Cellular Excitability, and (5) Synapse Forma [...] 1516 9816 |
Neurobiology of Sleep and Microbiomics in Agingby
Abstract
(1) Background: The daily rhythms of life on earth are governed by a central clock located in the hypothalamus and entrained primarily by light. By virtue of its connections to a myriad of other clocks located both in the brain and in peripheral organs and cells, this clock provides a timing signal based on the light/dark cycle by which organismal physiology and behaviour are governed. Disturbances of these natural rhythms have multiple downstream effects, frequently resulting in dysregulations of sleep and wake cy [...] 1403 12979 |
FASD and Brain Development: Perspectives on Where We are and Where We Need to Goby
Abstract
Maternal consumption of alcohol (ethanol) during pregnancy can lead to life-long neurobehavioral and cognitive abnormalities in the offspring, collectively referred to as Fetal Alcohol Spectrum Disorders (FASD). Prenatal exposure to ethanol is one of the leading causes of non-genetic intellectual disability and FASD is an umbrella category that includes Fetal Alcohol Syndrome, Partial Fetal Alcohol Syndrome, Alcohol Related Birth Defects, and Alcohol Related Neurodevelopmental Disorder. Children with a history of&n [...] 1459 11379 |
Perspectives on the Neurobiology of Antipsychotic Drugs in Psychiatric DisordersAbstract
Antipsychotics have been a pillar in the treatment of schizophrenia since their introduction more than 60 years ago. Their variety in structures and receptor binding properties confers on them a complex clinical profile of effectiveness and risk of adverse side-effects. Although antipsychotics are best known for their therapeutic effects in schizophrenia, these are limited to the positive symptoms, with much less influence on negative symptoms or cognitive deficits. Moreover, although the newer (so-called second-ge [...] 1289 11833 |
Advancing Marine Renewable Energy for Island Nations: Design and Development of a 20 kW Floating Kuroshio Turbine (FKT)Abstract
Taiwan relies heavily on imported fossil fuels, with over 98% of its energy demand supplied by foreign sources, posing significant challenges to national energy security. To explore alternatives, this study investigates the potential of marine renewable energy by developing a 20 kW floating hydrokinetic turbine prototype designed for deployment in the Kuroshio Current. The research encompasses system design, model validation, and both tank and at-sea testing to evaluate hydrodynamic performance and power generation [...] 11 44 |
Framework for the Secured Integration of Renewable Energy into Power SystemsAbstract
This research introduces a blockchain framework to improve security and transparency for the use of renewable energy in power systems. The framework utilizes a permissioned blockchain architecture and IoT-based real-time monitoring to ensure data integrity and confidentiality and support efficient peer-to-peer (P2P) energy trading. Compared with traditional centralized energy management systems, the proposed design increases transaction security by 35%, decreases verification wait times by 28%, and decreases the ri [...] 79 581 |
BESS Sizing Optimization Combined with Optimal Scheduling Method Considering the Battery Degradation Using PSOAbstract
Recently, renewable energy projects using storage systems have gained significant attention. This innovative technology requires a comprehensive investigation to overcome the technical and economic issues, which are related to optimal storage system capacity and operational requirements. In this study, an extensive battery energy storage system (BESS) sizing method was proposed considering four variables: charging and discharging scheduling, state of charge, BESS rate energy and power capacity, and degradation effe [...] 333 1948 |
Bridging Togo’s Energy Gap: Renewable Energy Potentials, Policy Challenges, and Strategic Pathways for Sustainable DevelopmentAbstract
This work investigates the potential of renewable energy to significantly reduce Togo’s energy deficit, offering a critical analysis of the country’s current energy landscape. It evaluates the availability and viability of renewable energy sources—particularly solar and small-scale hydropower—and examines the mismatch between energy supply and growing demand. The study highlights Togo’s heavy reliance on biomass and energy imports from neighbouring countries such as Ghana, Côte d’Ivoire, and Nigeria, which exacerba [...] 465 3962 |
Photon Recycling for Indoor Energy Harvesting: Optical Optimization of LED-Driven Silicon Photovoltaic Systemsby
Abstract
Indoor environments offer a unique opportunity for photon recycling using LED-based illumination, particularly to address energy limitations of solar photovoltaic (PV) systems during nighttime or in low-light conditions. This study presents an optical and electrical performance evaluation of silicon-based photovoltaic (SPV) panels operating under controlled indoor LED lighting. Despite the low irradiance (~1.4 mW/cm2), significant power output was achieved through engineered panel configurations and optimized light [...] 507 3093 |
Fairness and Reasonableness Tariff Indicator (FRTI) to Meter and Compare Rate Policy in the Electricity Regimes. The Case of Argentina in 2022Abstract
The tariff policy for energy services is a fundamental issue for today's societies, especially for end users, including residential, commercial, and industrial. The main objective of this paper is to propose a statistical method to calculate, compare, and evaluate policies of this nature. To this end, firstly, it is intended to rethink an old concept on this type of policy, the principle of fairness and reasonableness, through the linkage with the perspective of human rights, specifically with the right to energy, [...] 514 4125 |
Lithium Stable Flexible Polyethylene Oxide-Based Composite Electrolyte with High Lithium-Ion Conducting NASICON-Type Solid Electrolyte for Lithium BatteriesAbstract
Solid lithium-ion conducting polymer electrolytes are attractive candidates for battery applications because they are flexible and less flammable, and can be easily prepared as large-sized thin films. However, the room temperature conductivity of conventional polymer electrolytes is relatively low, and detrimental lithium dendrite formation is observed at high current density. In this study, a composite polymer electrolyte of polyethylene oxide (PEO) with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and a hi [...] 592 3628 |
Gaseous Biofuels in Biorefineries: Biomethaneby
Abstract
The global production of biomethane is rapidly emerging as a sustainable alternative to fossil fuels for energy generation. Biogas, where methane (CH4) is usually one of the main components, is generated through the anaerobic digestion (AD) of various organic substrates, including animal manure, organic wastes, and wastewater. The efficiency of the AD process depends on key operational parameters and reactor designs that optimize microbial activity and gas yield. However, inhibitory compounds such as heavy metals, [...] 856 6265 |
Test Site for Small Wind Turbines – Technical and Logistical Issues of a Decade-Long ProjectAbstract
This work addresses the main results of a test site for small wind turbines (SWTs) located in Patagonia, and the development of the measurement systems involved, including the uncertainties calculations according to applicable IEC standards. Due to market evolution for over a decade, the test systems evolved from battery-charging SWTs to grid-connected units. The test site, developed and managed by state-owned INTI (National Institute for Industrial Technology), was established in 2012 and received support from the [...] 680 4882 |
Environmental Impacts of Different Electricity Production Scenarios in FranceAbstract
This study focuses on the environmental impacts of the electricity production scenarios proposed for France for 2060 by the French electricity network manager, RTE. They consider an increasing electricity consumption and a production without fossil fuels, essentially based on wind, photovoltaic, hydraulic, and, for some, nuclear power. The total power to install is significantly higher than the current one; it is higher in the scenarios that rely more on photovoltaic and less on nuclear. Renewable energies require [...] 777 8713 |
Assessment of Water Balance Dynamics and Resource Stress in the Gaza Strip, Palestineby
Abstract
Water scarcity is one of the most pressing global challenges, particularly in arid and semi-arid regions. In this context, the Gaza Strip, where groundwater is the only available natural water resource, faces severe water stress due to overexploitation and drought conditions. This study aimed to review the recent water budget for the Gaza Strip by collecting data for the years (2021-2022) which was analyzed, discussed, and compared with other studies. The results showed a sharp deterioration in the Gaza Strip in te [...] 785 6260 |
A Novel Approach to Carbon Monoxide Removal Using Transition Metal-Doped Boron Nitride Nanosensors for Environmental SustainabilityAbstract
Adsorption of toxic gas of CO molecules by using transition metals of X (X = Ti, V, Cr, Co, Cu, Zn)-doped boron nitride nanocage (B5N10_NC) has been studied by computational chemistry. Based on NQR analysis, X-doped on B5N10_NC has shown the lowest fluctuation in electric potential and the highest negative atomic charge, including 0.2331 (copper), 0.3112 (cobalt), 0.5883 (chromium), 0.6853 (zinc), 0.6893 (vanadium) and 0.7499 coulomb (titanium), respectively, have presented the most tendency for being the electron [...] 669 3787 |
Design and Management of Renewable Energy Systems for Isolated Communities with No Grid ConnectionAbstract
The growing demand for energy and the need to reduce dependence on non-renewable sources have driven the research and application of sustainable technologies. In this context, an integrated solution that combines distributed energy generation from renewable sources, such as wind and hydro, with efficient management of household energy consumption is proposed. This study focuses on the hybrid renewable energy system simulation analysis designed to meet the demand of an off-grid household in a self-consumption mode. [...] 738 4669 |
Experimental Study and Kinetic Modeling of Agro-Industrial Wastes for Conversion to Fuel Gas via the Boudouard ReactionAbstract
Independent parallel reactions (IPR) and distributed activation energy (DAEM) kinetic models were developed and compared for the combined pyrolysis-gasification of two agro-industrial waste materials. The aim was to recycle greenhouse gas carbon dioxide for mitigating emissions, to evaluate the thermal behavior, reactivity, conversion and product composition in terms of structural/chemical characteristics of the fuels, and to provide accurate kinetic parameters useful in the scaling-up of the process. The experimen [...] 817 4456 |
Optimization of Heat Transfer in Parabolic Trough Collectors Using Advanced Turbulator Designs and Nanofluidsby
Abstract
Parabolic trough collectors (PTCs) are essential for solar thermal energy systems, and their thermal efficiency can be significantly enhanced using turbulators and nanofluids. This numerical study introduces three novel fin-spiral turbulator configurations (4, 7, and 10 blades) to enhance heat transfer within the absorber tube. Additionally, three nanofluid types including water-based single-walled carbon nanotubes (SWCNT), cupric oxide (CuO), and a hybrid SWCNT-CuO, at concentrations of 1%, 3%, and 5% were evaluat [...] 1359 8641 |
Acknowledgment to Reviewers of Journal of Energy and Power Technology in 2024Abstract
The editors of Journal of Energy and Power Technology would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2024. We greatly appreciate the contribution of expert reviewers, which is crucial to the journal's editorial process. We aim to recognize reviewer contributions through several mechanisms, of which the annual publication of reviewer names is one. Reviewers can download a certificate of recognition directly from our submission system. Additionally, reviewers can [...] 523 3242 |
Quantification and Comparative Analysis of Environmental Factors to Large-Scale Solar Plant’s Energy Performance via Regression and Linear Correlation Modelsby
Abstract
Performance degradation, including system deterioration, corrosion, and energy loss in solar PV systems, can be caused by environmental conditions such as high humidity, frequent rainfall, and temperature swings in tropical nations. Over the years, photovoltaic energy has been successfully developed to have low production costs and high efficiency. It has been the main reason that solar energy is one of the fastest-growing renewable energies in the world, with a generation of 821 TWh of electricity since 2021, repr [...] 772 8359 |
High Data Rate MWD Mud Pulse Telemetry – From Mysteries to DiscoveryAbstract
Our new approach to MWD mud pulse telemetry offers significant increases over conventional data rates. Using waveguide acoustics, we show that common drilling communications channels support carrier frequencies exceeding several hundred Hertz. Such signals are prone to attenuation over large drill pipe distances. Low power, self-spinning “turbosirens” are designed, providing high torque and rotation rate performance at all flow rates without electric or hydraulic motor drives. The sirens rotate, drawing only on the [...] 1847 13259 |
Post-Combustion CO2 Capture from an Industrial Power Plant Using Five Chemical Solvents: A Comparative TEAAbstract
CO2 capture processes using five chemical solvents were modeled in Aspen Plus V.12.1 for the capture of over 90% CO2 from a 456 ton/hour split flue gas stream containing 12.02 mol% CO2 emitted by the Longview 780 MW power plant (West Virginia, USA). Since the flue gas contained 33.10 ppmv SO2 and 35.47 ppmv NO2, a gas polishing process, using deionized water (DIW), was included in the model for complete scrubbing of SO2 and NO2 from the raw flue gas before the CO2 capture process. The five chemicals used for CO2 ca [...] 1807 10358 |
Stability Improvement of Multimachine System Using Back-To-Back ConvertersAbstract
As the penetration level of inverter-based generators continues to increase, it becomes crucial to reduce power oscillations between inverters and synchronous generators (SG) to improve system stability. This paper uses a multimachine system as the research platform and proposes a grid separation method employing a multi-terminal back-to-back converter. The converter is designed to be placed at the point of common coupling (PCC) in the original multimachine system and can divide the original grid into multiple micr [...] 754 4265 |
The Brazilian Research Scenario in Green Hydrogen: A Brief Contextualizationby
Abstract
Hydrogen is crucial in various industrial sectors and can be obtained through different synthesis routes. However, a significant portion of its production still relies on chemical processes involving fossil fuels, resulting in hydrogen and the generation of greenhouse gases (GHGs) as the final byproduct. In alignment with the goals of the 2030 Agenda, where countries commit to implementing energy transition, hydrogen obtained through a green route has been increasingly explored by governmental and academic entities [...] 1496 8239 |
Nanostructure-Based Solid-State Energy Storage through Hydrogen Trapping in Batteries Using Materials Modelling TechniqueAbstract
A comprehensive investigation on hydrogen grabbing by SiO-GeO was carried out, including DFT computations at the CAM-B3LYP-D3/6-311+G (d,p) level of theory. The data shows that if silicon elements are replaced by germanium, the H-grabbing energy will be ameliorated. Electromagnetic and thermodynamic properties of SiO, GeO, and SiO-GeO nanoclusters have been evaluated. The hypothesis of the hydrogen adsorption phenomenon was confirmed by density distributions of PDOS and LOL for hydrated nanoclusters of H-SiO, H-GeO [...] 761 4252 |
Security Length Associated with the Risk of Ammonia Tank Leak Using CTOA Criterion and ALOHA SoftwareAbstract
Ammonia is a toxic gas and can cause tragic consequences for humans. The damage level depends on concentration and duration of exposure. The security length associated with the risk of a tank leak at the acute exposure level of 30 ppm (AEGL-1) has been computed. Two tools have been combined: the CTOA criterion and the ALOHA software. The CTOA, a measure of fracture resistance against ductile crack propagation, is implemented in Abaqus software to compute the size of a breach in a tank submitted to internal pressure [...] 765 5332 |
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