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Search Results: 1 - 10 of 9373 matches for " Ahmed Jama Isse "
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Usability Evaluation Metrics of Tourism Mobile Applications  [PDF]
Nor Laily Hashim, Ahmed Jama Isse
Journal of Software Engineering and Applications (JSEA) , 2019, DOI: 10.4236/jsea.2019.127016
Abstract: The use of mobile phone applications for our touristic activity is very common nowadays with the simplification of smartphones. The tourism mobile applications currently can be argued to be one of the most useful applications that can facilitate the movement of travelers. However, existing usability evaluation metrics are too general to be applied to a more specific application, such as mobile tourism application. Thus, the objective of the study is to propose usability evaluation metrics for tourism mobile applications. The study employs four phases: identifying problem and the objective, encompassing the techniques of developing usability measurement of metrics, selecting the usability metrics of tourism mobile application and conducting expert review and verification. The verification phase was conducted using expert review approach to measure the proposed metrics in terms of its consistency ease of use, understandable, verifiable and overall impression. The finding revealed that the proposed metrics have been well received by the experts in terms of consistency, ease to use, understandable, verifiability and overall impression. Finally, this study presented usability metrics for the tourism mobile applications that can be used by designers or usability practitioners in creating a useable mobile application for the tourists.
Effects of Water Stress Conditions and Plant Growth Regulators on Growth, Yield and Yield Components in Durum Wheats (Triticum turgidum L. var. Durum) under the Jordan Conditions
Al-Tabbal Jalal Ahmed,Y. Ayad Jama
Journal of Agronomy , 2007,
Abstract: Greenhouse and field studies were conducted at the University of Jordan Research Station during 2000/2001 growing season to examine the influence of Mepiquat Chloride (1,1-dimethyl piperidinium Chloride) and Ethephon (2-chloroethyl-phosphonic acid) on growth, yield and water use efficiency of two selected wheat cultivars (Namely, Hourani 27 and Petra, Triticum turgidum L. var. Durum). In greenhouse pot experiments, seeds of wheat cultivars were soaked in Mepiquat Chloride solution at a rate of 0, 250, 500 and 750 mg kg-1 in one experiment. Ethephon was sprayed independently at a rate of 0, 150, 300 g ha-1 at the Zadoks 10 and 20, respectively in a second experiment. Plants in both experiments were subjected to two moisture levels: No stress and water stress for the entire growth period of the two cultivars. In field experiments, Ethephon solutions was sprayed independently at a rate of 0, 150, 300 and 450 g ha-1 at the Zadoks 10, 20 and 30, respectively in the first experiment. Seeds of both cultivars were soaked in Mepiquat Chloride solution at a rate of 0, 250, 500, 750 and 1000 mg kg-1 in a second experiment. Mepiquat Chloride and Ethephon treatment had no influence on shoot: root ratio of cultivars. Grain yield of cultivars grown either under well water or water stress conditions increased with Mepiquat Chloride treatment. Ethephon treatment only increased grain yield and harvest index of Hourani cultivar under well-watered conditions in both greenhouse and field experiments. This might be attributed to the increase in the number of fertile tillers per plant.
Association of Aggression and Non-Suicidal Self Injury: A School-Based Sample of Adolescents
Jie Tang, Ying Ma, Yong Guo, Niman Isse Ahmed, Yizhen Yu, Jiaji Wang
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0078149
Abstract: Purpose Non-suicidal self-injury (NSSI) in adolescent has drawn increasing attention because it is associated with subsequent depression, drug abuse, anxiety disorders, and suicide. In the present study, we aimed to estimate the prevalence of non-suicidal self-injury (NSSI) in a school-based sample of Chinese adolescents and to explore the association between aggression and NSSI. Methods This study was part of a nationwide study on aggression among adolescents in urban areas of China. A sample of 2907 school students including 1436 boys and 1471 girls were randomly selected in Guangdong Province, with their age ranging from 10 to 18 years old. NSSI, aggression, emotional management and other factors were measured by self-administrated questionnaire. Multinomial logistic regression was used to estimate the association between aggression and NSSI, after adjustment for participants’ emotional management, and other potential confounding variables. Results The one year self-reported prevalence of NSSI was 33.6%. Of them, 21.7% engaged in ‘minor NSSI’, 11.9% in ‘moderate/severe NSSI’. 96.9% of self-injuries engaged in one to five different types of NSSI in the past year. Hostility, verbal and indirect aggression was significantly associated with self-reported NSSI after adjusting for other potential factors both in ‘minor NSSI’ and ‘moderate/severe NSSI’. Hostility, verbal and indirect aggression was significantly associated with greater risk of ‘minor NSSI’ and ‘moderate/severe NSSI’ in those who had poor emotional management ability. Conclusion These findings highlight a high prevalence of NSSI and indicate the importance of hostility, verbal and indirect aggression as potentially risk factor for NSSI among Chinese adolescents.
Unification of Gravity, Gauge and Higgs Fields by Confined Quantum Fields-Mathematical Formulation-
Toshiki Isse
Physics , 1992, DOI: 10.1142/S0217732393000878
Abstract: Dynamics of quantized free fields ( of spin 0 and 1/2 ) contained in a subspace $V_*$ of an N+4 dimensional flat space $V$ is studied. The space $V_*$ is considered as a neighborhood of a four dimensional submanifold $M$ arbitrarily embedded into $V$. We study the system as a simple model of unified theory of gravity ($g$), SO(N) gauge fields ($A$) and Higgs fields ($\phi $). In this paper classical treatment of the system is given. We show that, especially when the fields have spin 1/2, the system is described by an infinite number of fields in $M$ interacting with $g$, $A$ and $\phi $. The fields $g$, $A$ and $\phi $ are induced themselves by embedding functions of $M$ and correspond respectively to induced metric, normal connection and extrinsic curvature of $M$.
Unification of Gravity, Gauge and Higgs Fields by Confined Quantum Fields II -Effective Theory-
Toshiki Isse
Physics , 1992, DOI: 10.1142/S0217732393000970
Abstract: Dynamics of quantized free fields ( of spin 0 and 1/2 ) contained in a subspace $V_*$ of an N+4 dimensional flat space $V$ is studied. The space $V_*$ is considered as a neighborhood of a four dimensional submanifold $M$ arbitrarily embedded into $V$. We show that Einstein SO(N)-Yang-Mills Higgs theory is induced as a low energy effective theory of the system. Gravity, SO(N) gauge fields and Higgs fields are obtained from embedding functions of $M$.
Aula de Educa o Física n o é lugar de estudar o corpo!?
Silvane Fensterseifer Isse
Movimento , 2011,
Abstract: Este artículo discute la comprensión de los estudiantes de la escuela secundaria sobre la relación entre el estudio del cuerpo y la educación física escolar. El estudio utilizó observaciones, entrevistas semi-estructuradas, diálogos y diario de campo como herramienta para la colecta de informaciones. Los resultados indican que hay una disociación de la educación física en la escuela y los estudios sobre el cuerpo. Estudiar el cuerpo se relaciona con las disciplinas de la biología y las ciencias y con las intervenciones de los profesionales de la salud en la escuela. Hay una perspectiva biomédica, individualista y jerárquica en respeto a los saberes del cuerpo, que se entiende desde un enfoque ahistórico, descontextualizado, disciplinar y fragmentado. Problematiza la idea de que estudiar el cuerpo está directamente relacionado a aprender cuidados que lo hacen más saludable, relacionado mucho más con las ciencias de la salud que con la pedagogía.
The Stability of the Minisuperspace
Atushi Ishikawa,Toshiki Isse
Physics , 1993, DOI: 10.1142/S0217732393003834
Abstract: The stability of the minisuperspace model of the early universe is studied by solving the Wheeler-DeWitt equation numerically. We consider a system of Einstein gravity with a scalar field. When we solve the Wheeler-DeWitt equation, we pick up some inhomogeneous wave modes from the infinite number of modes adequately: degrees of freedom of the superspace are restricted to a finite one. We show that the minisuperspace is stable when a scale factor ($a$) of the universe is larger than a few times of the Planck length, while it becomes unstable when $a$ is comparable to the Planck length.
The Onset of Enhanced Intestinal Permeability and Food Sensitivity Triggered by Medication Used in Dental Procedures: A Case Report
Aristo Vojdani,Jama Lambert
Case Reports in Gastrointestinal Medicine , 2012, DOI: 10.1155/2012/265052
Abstract: Enhanced intestinal permeability and food sensitivity are two of the many proven causes of gastrointestinal disorders. This present report describes a woman with no previous gastrointestinal (GI) complaints, who underwent dental root canal, bone graft, and implant procedures. Postsurgery she experienced an allergic reaction to the combined medications. In the weeks that followed, she presented with multiple food intolerances. Four weeks after the final dental procedure, she was assessed serologically for mucosal immune function, salivary, and blood-gluten reactivity, intestinal permeability, and other food sensitivities. Compared to her test reports from two months prior to her first dental procedure, the patient’s results showed high total secretory IgA (SIgA) and elevated salivary antibodies to alpha-gliadin, indicating abnormal mucosal immunity and loss of tolerance to gluten. Her serologic assessments revealed immunoglobulin G (IgG) and IgA antibodies to a range of wheat/gluten proteins and peptides, gut bacterial endotoxins and tight junction proteins. These test results indicate gut dysbiosis, enhanced intestinal permeability, systemic gluten-reactivity, and immune response to other dietary macromolecules. The present case suggests that patients who experience severe allergic or pseudoallergic reactions to medication should be assessed and monitored for gut dysfunction. If left untreated this could lead to autoimmune reactions to self tissues.
The Role of Th17 in Neuroimmune Disorders: Target for CAM Therapy. Part II
Aristo Vojdani,Jama Lambert
Evidence-Based Complementary and Alternative Medicine , 2011, DOI: 10.1093/ecam/nep063
Abstract: Decades of research went into understanding the role that Th1 autoreactive T-cells play in neuroinflammation. Here we describe another effector population, the IL-17-producing T-helper lineage (Th17), which drives the inflammatory process. Through the recruitment of inflammatory infiltration neutrophils and the activation of matrix metalloproteinases, IL-17, a cytokine secreted by Th17 cells, contributes to blood-brain barrier breakdown and the subsequent attraction of macrophages and monocytes into the nervous system. The entry of cells along with the local production of inflammatory cytokines leads to myelin and axonal damage. This activation of the inflammatory response system is induced by different pathogenic factors, such as gut bacterial endotoxins resulting in progressive neurodegeneration by Th17 cells. Through the understanding of the role of bacterial endotoxins and other pathogenic factors in the induction of autoimmune diseases by Th17 cells, CAM practitioners will be able to design CAM therapies targeting IL-17 activity. Targeted therapy can restore the integrity of the intestinal and blood-brain barriers using probiotics, N-acetyl-cysteine, α-lipoic acid, resveratrol and others for their patients with autoimmunities, in particular those with neuroinflammation and neurodegeneration. 1. Introduction In the previous article, we established the differentiation of activated T-helper cells into T-helper-17 (Th17) and the pathogenic role of interleukin-17 (IL-17) in neuroimmune disorders. Here we review the inflammatory pathophysiology of intestinal barrier permeability, which can lead to the breach of the blood-brain barrier (BBB). The tight junctions of the intestinal barrier may open due to environmental stressors, which can upset the microflora homeostasis thereby producing endotoxins that activate proinflammatory cytokine IL-1 . The upregulation of IL-1 begins a cascade of the inflammatory response system, resulting in high levels of IL-17-producing cells in various tissues. Additionally, the stressors that are capable of opening the epithelial tight junction barrier are also able to breakdown the BBB. Once inside the central nervous system, Th17 deposits IL-17 leading to CNS inflammation, which attracts additional inflammatory substances [1–6]. Neuropeptide substance P (SP), along with its high affinity receptor neurokinin-1 (NK-1), activates NF- B, a facilitator in the production of proinflammatory cytokines, and SP also reduces the production of immunoregulatory IL-10 and TGF- [7–9]. Therefore, daily environmental stressors can disrupt
The Role of Th17 in Neuroimmune Disorders: Target for CAM Therapy. Part I
Aristo Vojdani,Jama Lambert
Evidence-Based Complementary and Alternative Medicine , 2011, DOI: 10.1093/ecam/nep062
Abstract: CD4+ effector cells, based on cytokine production, nuclear receptors and signaling pathways, have been categorized into four subsets. T-helper-1 cells produce IFN-γ, TNF-β, lymphotoxin and IL-10; T-helper-2 cells produce IL-4, IL-5, IL-10, IL-13, IL-21 and IL-31; T-helper-3, or regulatory T-cells, produce IL-10, TGF-β and IL-35; and the recently discovered T-helper-17 cell produces IL-17, IL-17A, IL-17F, IL-21, IL-26 and CCL20. By producing IL-17 and other signaling molecules, Th17 contributes to the pathogenesis of multiple autoimmune diseases including allergic inflammation, rheumatoid arthritis, autoimmune gastritis, inflammatory bowel disease, psoriasis and multiple sclerosis. In this article, we review the differential regulation of inflammation in different tissues with a major emphasis on enhancement of neuroinflammation by local production of IL-17 in the brain. By understanding the role of pathogenic factors in the induction of autoimmune diseases by Th17 cells, CAM practitioners will be able to design CAM therapies targeting Th17 and associated cytokine activities and signaling pathways to repair the intestinal and blood-brain barriers for their patients with autoimmunities, in particular, those with neuroinflammation and neurodegeneration. 1. Introduction For more than 30 years T-helper (Th) cells have been divided by immunologists into two functional subsets: T-helper-1 (Th1) and T-helper-2 (Th2). Th1 and Th2 subsets are characterized by a distinct activity of transcription factor and pattern of cytokine-secretion phenotype [1, 2]. This differentiation of CD4+ T-cells toward Th1, Th2 and other subsets depends on an appropriate signal through the TCR and generated cytokine milieu is an important factor that influences CD4 cell lineage commitment. For example, interleukin (IL)-12 activates STAT4 and drives na?ve CD4+ T cells to become Th1 cells that produce interferon-gamma (INF- ). These signals from IL-12 and IFN- by acting through STAT4 and STAT1, increase the expression of the transcription factor called T-bet, which promotes further production of IFN- and commitment to the Th1 cell lineage. Th1 cells classically produce IFN- , tumor necrosis factor-beta (TNF- ) and interleukin-10 (IL-10), and mediate cellular immune responses against tumor cells, intracellular viruses and bacteria through activation of macrophages and cytotoxic T-cells. In addition, Th1 cells drive cell-mediated response leading to tissue damage and drive humoral immune responses in certain immunoglobulin subclasses termed Ig2a. Innate immune cells, by signals through
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