857 research outputs found
A case study: the development of Stephanie's algebraic reasoning
No full textThis research provides an analysis of the mathematical growth and development of one student, Stephanie, as she worked on early algebra tasks during her eighth-grade year as part of a teaching experiment. Stephanie was among the original participants in a longitudinal study which investigated how students develop mathematical ideas under conditions that fostered independent exploration, reasoning, and justification of ideas (Maher, 2005). A qualitative approach based on the analytical model described by Powell, Francisco, and Maher (2003), was taken in analyzing videotape data from the Robert B. Davis Institute of Learning archive, along with student work. Seven task-based interview sessions were analyzed, spanning a six month period, beginning from November 8, 1995 to April 17, 1996. The research focused on Stephanie’s algebraic reasoning; in particular, how she built an understanding of the binomial theorem and related it to Pascal’s triangle. Stephanie’s representations, her explanations and justifications, and her methods of dealing with obstacles to understanding, were all examined and provided the basis for this research. The analysis shows that Stephanie built her mathematical understanding through the development of multiple representations of concepts and moved fluidly between and among the representations that she organized into ‘symbolic’ and ‘visual’ representations. Symbolic representations included algebraic expressions, combinatorics notation, and Pascal’s triangle while visual representations included drawings, tables, models formed by algebra blocks and other manipulatives, and towers built with unifix cubes. Furthermore, through Stephanie’s explanations and justification of her representations and reasoning in general, she invented strategies to convince herself as well as the researchers that she had fulfilled the requirements of the problem task. When dealing with obstacles to her understanding such as lack of information, or calculating obstacles, Stephanie acquired the use of several heuristic methods in order to overcome them. These included the use of substituting in numbers in order to test a conjecture; returning to basic meaning; drawing diagrams; building models; and considering a simpler problem. Throughout the task-based interviews, Stephanie retrieved knowledge from her earlier problem solving and extended this knowledge to build new ideas, while tackling more challenging problems. In particular, Stephanie mapped the coefficients in the binomial expansion to particular rows in Pascal’s Triangle; she connected these ideas to her problem solving from earlier work in the elementary grades. The findings are relevant to the timing and method of early algebraic instruction in schools.Ed.D.Includes bibliographical referencesby Eman Y. Aboelnag
Comparing genetic markers' efficiencies for discrimination between two commercially important holothuroids in the Mediterranean Sea, Holothuria polii and Holothuria sanctori
No full textMohammed-Geba, Khaled, Abbas, Eman M., Ahmed, Hamdy O., Shalabi, Mohammed A., Hamed, El Sayed A. E., Abdel Razek, Fatma A., Soliman, Taha (2022): Comparing genetic markers' efficiencies for discrimination between two commercially important holothuroids in the Mediterranean Sea, Holothuria polii and Holothuria sanctori. Zootaxa 5092 (5): 559-575, DOI: https://doi.org/10.11646/zootaxa.5092.5.
Brain maturation, cognitive tasks, and quantitative electroencephalography : a study in children with attention deficit hyperactive disorder
No full textAttention Deficit Hyperactivity Disorder (ADHD) is one of the most common psychiatric disorders of childhood. Despite a long history, widespread clinical acceptance, and extensive research, the diagnosis and treatment are still controversial. The aim of the thesis was to study the hypothesis that some children with ADHD may show these symptoms due to a slow speed of mental maturation with the possibility of a catch-up.In Study I, the association between ADHD and global maturity was tested using a twin design (incl. 1106 pairs of the 1480 pairs of twins born in Sweden Apr. 1985 - Dec. 1986). The results showed different pathways through which genetic effects may influence the behavior pattern in children with ADHD. Among boys, there are at least two different genetic pathways to explain ADHD, one through predisposition for maturational lag and one specific to ADHD. A different pathway may explain ADHD in girls.In Study II, the relationship between behavior, ADM symptoms and maturity was studied among 1079 pairs of twins from study I using a questionnaire (a global maturity parent's scale) given to the parents. Relationships were found between the maturity factor and the CBCL grouping of syndromes (internalizing, externalizing, total behavior problems score) as well as between the maturity factor and ADHD. From the parents' point of view the behavior problems in their children may be related to maturity.In Study III, a computerized tool, the Gordon Diagnostic System (GDS) was used to test concentration and impulse control comparing 71 children with ADHD (61 boys, 10 girls; mean age 10.5 y) and 98 controls (65 boys, 23 girls; mean age 10.2 y). Differences were found between ADHD children and age-matched control children in each age group. The GDS scores were highly correlated with age with better a performance among the older children, which could support the relevance of the maturational lag hypothesis.In Study IV a possible immature brain processing during concentration was studied comparing 36 children with ADHD (31 boys, 5 girls; mean age 10.5 y) and 63 controls (46 boys, 17 girls; mean age 10.0 y). QEEG techniques were used when the children performed the Vigilance Task of GDS. Compared to controls children with ADHD displayed specific differences in the pattern of frontal, temporal, and parietal brain activation. They had an enhanced slow cortical activity and decreased fast activity similar to younger children. These findings indicate a different arousal level in children with ADHD, which could be due to a delay in functional cortical maturation.In Study V, impulsivity, brain processing and possible immaturity were studied. The same children with ADHD and controls as in study IV performed the Delay Task of GDS during registration of QEEG. In similarity to the results of study IV children with ADHD displayed different electrophysiological reactions, which may indicate that they, like younger children, have problems in cerebral processing when performing a mentally demanding task during a restricted time.In Study VI, the "maturational lag" concept explaining ADHD was discussed over viewing previous and current literature on ADHD. The overview indicates that the DSM criteria of ADHD may be over- inclusive and shows that maturity and developmental aspects are important factors to be included in studies of ADHD. A slow speed in mental development may be of importance for the treatment and prognosis of ADHD.Conclusion. The over all results support the view, that some children with ADHD could represent a continuum of normal childhood behavior with maturational trajectories that are lagging behind and may catch up.List of scientific papersI. Steffensson B, Larsson JO, Fried I, El-Sayed E, Rydelius PA, Lichtenstein P (1999). Genetic disposition for global maturity: an explanation for genetic effects on parental report on ADHD. Inter J Behav Develop. 23(2): 357-74.II. Larsson JO, Lichtenstein P, Fried I, El-Sayed E, Rydelius PA (2000). Parents perception of mental development and behavioural problems in 8 to 9-year-old children. Acta Paediatr. 89(12): 1469-73. https://pubmed.ncbi.nlm.nih.gov/11195238III. El-Sayed E, vant Hooft I, Fried I, Larsson JO, Malmberg K, Rydelius PA (1999). Measurements of attention deficits and impulsivity: a Swedish study of the Gordon Diagnostic System. Acta Paediatr. 88(11): 1262-8. https://pubmed.ncbi.nlm.nih.gov/10591431IV. El-Sayed E, Larsson JO, Persson HE, Rydelius PA (2002). Altered cortical activity in children with attention-deficit/hyperactivity disorder during attentional load task. J Am Acad Child Adolesc Psychiatry. 41(7): 811-9. https://pubmed.ncbi.nlm.nih.gov/12108806V. El-Sayed E, Larsson JO, Persson HE, Berg E, Rydelius PA (2002). Specific QEEG patterns during delay task in children with attention deficit/hyperactivity disorder. [Submitted]VI. El-Sayed E, Larsson JO, Persson HE, Santosh PJ, Rydelius PA (2002). "Maturational Lag" hypothesis of ADHD: An update. Acta Paediatr. [Accepted]</p
Perancangan Web Jasa Penyewaan Sound System Pada Eman Sounds: Penyewaan, Sound System, Web
No full textEman Sounds is a business venture in the field of sound system rental services. The Eman sounds does not currently have a website application. The leasing service transaction system is still done conventionally, where if anyone wants to rent a sound system for a wedding or other official event can come directly to the Eman Sounds to see and rent it. For transaction reports sound system rental services are still recorded with paper so as to allow for data loss and errors in recording transactions. The purpose of this study is that the author will design a web sound system rental service for Eman Sounds so that it is expected to simplify the process of leasing transactions and making rental reports. The author uses the system development method, namely the waterfall model for this study. The use of PHP and HTML programming languages the author uses to create web rental services and MYSQL as the database. The results of this study are expected that with a web design sound system rental service can help Eman Sounds in the process of managing rental transactions and reports
D04. Department of Pharmaceutics and Drug Delivery
No full textCorresponding author (Pharmaceutics and Drug Delivery): Eman Ashour, [email protected]://egrove.olemiss.edu/pharm_annual_posters/1026/thumbnail.jp
Isolation and identification of oil degrading bacteria from oil contaminated soil, 2015
No full textOil spills are a universal threat impacting local, national and world communities alike. Bioremediation that is natural, efficient, economical and safe is the best solution for protecting the environment from oil related damages. In this study, motor oil degrading bacteria were isolated from oil-contaminated soil samples from a suburban Atlanta, Georgia community. Mineral salt broth containing 1 Ow-40 motor oil as the sole carbon source was used to isolate motor oil degrading bacteria. Motor oil tolerant and metabolizing bacteria were identified using morphological and biochemical tests. Two bacterial isolates were then tested for their tolerance varying concentrations of diesel and kerosene oils for comparison with motor oil consumption. Observed results suggest that the isolated bacteria from oil contaminated soil possess abilities to metabolize motor oil, kerosene and diesel. Knowledge of the tolerance ranges of the isolated bacteria can indicate their potential to be of use in the remediation of terrestrial petroleum oil spills in a manner that is natural, economical, quick and efficient
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The principle of non-refoulement under the European Convention on Human Rights and the United Nations Convention Against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment /
No full textIn this study, Eman Hamdan examines the protection against refoulement under the European Convention on Human Rights and the UN Convention against Torture, with the aim to determine which of those Conventions affords better protection for international protection seekers. Hamdan explores the scope and content of the principle of non-refoulement under both Conventions and the application of the principle to the immigration control measures and the extraordinary rendition operations. The author provides a comprehensive and comparative analysis of the case-law of both the European Court of Human Rights and the UN Committee against Torture on the procedural and substantive aspects of the principle of non-refoulement, in order to help practitioners to determine which of these human rights treaty bodies is more favorable for their specific non-refoulement case. This book was chosen to participate in the Professor Walther Hug Prize 2014-2015, which is a prize for the best legal researches in Switzerland for each academic year
The effect of intravenous infusion of N-acetyl cysteine in cirrhotic patients undergoing liver resection: A randomized controlled trial
No full textBackground and Aims: Liver resection can lead to hepatocellular dysfunction. The aim was to evaluate the effect of N-acetyl cysteine (NAC) on liver enzymes (alanine aminotransferase [ALT] and aspartate aminotransferase [AST]), international normalized ratio (INR), C-reactive protein (CRP), and intercellular adhesion molecule 1 (ICAM 1) in cirrhotic patients undergoing liver resection.
Material and Methods: A randomized controlled trial (RCT), Pan African Clinical Trial registry (PACTR201508001251260). 60 Child A patients were studied. NAC group (n = 30) received intravenous infusion of NAC 10 g/24 h in 250 ml of 5% dextrose during surgery and for 2 days. Controls (C) (n = 30) received a similar volume of 5% dextrose. All above parameter were measured during and after surgery.
Results: ALT and AST were significantly elevated after surgery, but to a less extent with NAC versus C (day 3; 118.3 ± 18.6 vs. 145.4 ± 14.0 U/L. P < 0.01) and (121.5 ± 19.5 vs. 146.6 ± 15.1 U/L, P = 0.00), respectively. Lower serum CRP and ICAM 1 with NAC versus C on day 3 (44.2 ± 13.4 vs. 68.7 ± 48.2 mg/l, P = 0.003), (308.8 ± 38.2 vs. 352.8 ± 59.4 ng/ml, P = 0.002), respectively. Hospital stay was shorter with NAC versus C (6.1 ± 0.8 vs. 6.9 ± 1.2 days, P = 0.006). Duration of surgery, INR, and hemodynamics were comparable.
Conclusion: Prophylactic NAC in hepatic patients undergoing liver surgery attenuated postoperative increase in transaminases, ICAM 1, and CRP blood levels. The impact of these findings and the cost benefit of reduced hospital stay on enhanced recovery after surgery needs to be evaluated
IL-17Aは赤痢アメーバの腸管感染においてIFN-γ/IL-4比の減少と持続感染に寄与する
No full textAmebiasis is an infectious disease caused by Entamoeba histolytica, an anaerobic protozoan parasite, and is a major public health problem worldwide, particularly in areas with inadequate sanitation and poor hygiene. Th1 responses, represented by interferon gamma (IFN-γ), play a protective role by clearing the amebae from the gut, whereas Th2 responses are responsible for chronic infection. Th17 responses preconditioned by vaccination or by modulating the intestinal microbiome protect mice from the settlement of E. histolytica. However, the role of interleukin-17A (IL-17A), which is upregulated during the natural course of intestinal amebiasis, has not been clarified. The aim of this study was to investigate the role of IL-17A during intestinal amebiasis in a mouse model. IL-17A knockout and wild-type CBA/J mice were challenged intracecally with 2 × 106 E. histolytica trophozoites, and their infection, pathology, and immune responses were monitored. Neither the initial settlement of E. histolytica nor the inflammation of the cecum was affected by the absence of IL-17A for week 1, but the infection rate and parasite burden declined in a late stage of infection, accompanied by an increased IFN-γ/IL-4 ratio. Therefore, IL-17A contributes to the persistence of E. histolytica and modulates the immune response, including the IFN-γ/IL-4 ratio, which may be responsible for the reduction of the parasite burden in the IL-17A knockout mice during the chronic phase of intestinal amebiasis.長崎大学学位論文 学位記番号:博(医歯薬)甲第1005号 学位授与年月日:平成29年12月6日Author: Sharmina Deloer, Risa Nakamura, Mihoko Kikuchi, Taeko Moriyasu, Yombo Dan Justin Kalenda, Eman Sayed Mohammed, Masachika Senba, Yoichiro Iwakura, Hiroki Yoshida, Shinjiro HamanoCitation: Parasitology International, 66(6), pp.817-823; 201
Nations without nationalisms: on Palestinian and American Indian literary imaginations
No full text“Nations without Nationalisms: On Palestinian and American Indian Literary Imaginations” approaches settler colonialism as a story that exhibits complex identity politics, competing concepts of humanity, and overlapping narratives of diaspora and trauma. It is also a story that is constantly disputed by Indigenous presence and decolonial and international movements of resistance. I explore indigeneity as a category of identification to better understand forced and voluntary migrations and what constitutes the concepts of settler, refugee, and migrant in the United States and Israel. Building on an interpretive framework that situates Indigenous theory alongside Palestine studies, my dissertation has two major arguments. First, I critique settler nationalism and approach the United States and Israel as exhibiting a discursive allegiance to each other and, more broadly, to European principles of nationhood. I develop this analysis by drawing a transnational web of literary exchanges in the nineteenth century that includes Emma Lazarus, George Eliot, Mordecai Noah, Theodor Herzl, and Israel Zangwill. Second, I argue that Indigenous nations, as land-based collectives that have functioned without statehood, intervene in popular assumptions that the nation-state is the only form of legitimate belonging. Here, I analyze expressions of indigeneity in Palestinian and American Indian writings towards conceptualizing “Indigenous literature” as a global literary genre with shared literary patterns and significant political interventions. Approaching this genre comparatively, I analyze representations of being, land, and political movement as an Indigenous literary modulation of character, setting, and plot, and as they unfold in the writings of Mahmoud Darwish, Samih Al-Qasim, Suheir Hammad, Steven Salaita, Leanne Simpson, and LeAnne Howe. As it exists today, U.S. scholarship can benefit from incorporating a global narrativization of indigeneity and ongoing colonialisms and attending more closely to their cultural nuances. Furthermore, learning from Palestine as a microcosmic example of modern-day settlement, exile, and ethnic conflict can help us understand the precarious relationship between displacement and nationalism in the U.S. and in many other parts of the world.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-08-01The student, Eman Ghanayem, accepted the attached license on 2020-07-10 at 02:25.The student, Eman Ghanayem, submitted this Dissertation for approval on 2020-07-10 at 02:58.This Dissertation was approved for publication on 2020-07-10 at 15:53.DSpace SAF Submission Ingestion Package generated from Vireo submission #15556 on 2020-10-02 at 15:50:12Made available in DSpace on 2020-10-07T22:49:51Z (GMT). No. of bitstreams: 3
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