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Search Results: 1 - 10 of 401259 matches for " M. Shibley Sadique "
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Do Stock Prices in Turkey Reflect Fundamental Information? A Firm-level Analysis
M. Arifur Rahman,M. Shibley Sadique,Shah Saeed Hassan Chowdhury
International Journal of Economics and Finance , 2012, DOI: 10.5539/ijef.v4n12p137
Abstract: This paper investigates the correspondence between stock prices and firm fundamentals in Turkey. In pursuing our objective, we explore the relationship between firm-specific variation in stock returns and fundamentals in the context of a simple present value framework. We overcome the typical insufficiency of the spans of time-series accounting data in emerging market research, and the consequent loss of statistical testing power, by adopting a firm-level micro panel data approach. After properly accounting for unobserved heterogeneity, potential endogeneity bias and volatility persistence, we find that firm-specific variation of stock returns in Turkey is only weakly correlated with alternative proxies of firm-specific variation in firm fundamentals and that the relationship is not robust to the influence of control variables such as the firm size. Our findings are, therefore, consistent with the usual perception that stock prices in emerging markets contain little firm-specific information.
Individual freedom versus collective responsibility: an economic epidemiology perspective
M Zia Sadique
Emerging Themes in Epidemiology , 2006, DOI: 10.1186/1742-7622-3-12
Abstract: Immunisation represents a classic case of social dilemma: a conflict of interest between the private gains of individuals and the collective gains of a society. An individual's self-interest and choice often leads to a vaccination uptake rate less than the social optimum as individuals do not take into account the benefit to others [1]. Conventional wisdom generally favours public intervention in order to produce a socially warranted level of vaccination. This line of argument is primarily based on the externality associated with individual decisions, since individuals are presumed to make choices on the basis of their own welfare gains, without considering the full social impact of their decisions. As the benefits to society are larger than the sum of those to individuals, public policy measures aim to increase demand closer to the social optimum by subsidising the vaccine (many countries provide vaccines free of charge) or through compulsory vaccination, although such a policy is almost always partial. Individuals with religious, medical or social reasons are often exempted. There is, however, controversy over the effectiveness of public intervention compared to the free choice outcome [1-3], and it is the intention of this article to address this issue.Vaccination decisions are made under imperfect information, which means an individual's assessment of the risks and benefits of vaccination is often inaccurate. But even if individuals had perfect information regarding the cost and benefits of vaccination, the free choice outcome would still be different from the social outcome due to the 'free rider' problem associated with vaccination. The changes in risk of infection tend to induce changes in activities that put the individual at risk, which in turn alter the dynamics of disease transmission. There is a feedback mechanism between infection rate and rational response, but the classic models of infectious disease have not incorporated such endogenous behavioural r
Review on fifteen Statistical Tests proposed by NIST
Journal of Theoretical Physics and Cryptography , 2012,
Abstract: With a motivation to understand all the fifteen test algorithms and to write their codes independently without looking at various sites mentioned in the NIST document a review study of the NIST Statistical Test Suite is undertaken. All the codes are executed with the test data given in the NIST document and excellent agreements have been found. The codes have been put together in a software, called as CU software, executable in Linux platform. Based on the CU software, exhaustive tests are executed on a long bit sequence generated by the Blum‐Blum‐Shub generator (BBSG). The CU software executes properly giving the results almost matched with those of the NIST results.
A Review Study of NIST Statistical Test Suite: Development of an indigenous Computer Package
J K M Sadique Uz Zaman,Ranjan Ghosh
Computer Science , 2012,
Abstract: A review study of NIST Statistical Test Suite is undertaken with a motivation to understand all its test algorithms and to write their C codes independently without looking at various sites mentioned in the NIST document. All the codes are tested with the test data given in the NIST document and excellent agreements have been found. The codes have been put together in a package executable in MS Windows platform. Based on the package, exhaustive test runs are executed on three PRNGs, e.g. LCG by Park & Miller, LCG by Knuth and BBSG. Our findings support the present belief that BBSG is a better PRNG than the other two.
Kinetics of Degradation of Eosin Y by One of the Advanced Oxidation Processes (AOPs)—Fenton’s Process  [PDF]
Ashraf Hossain, A. B. M. Sadique Rayhan, Md. Jahir Raihan, Aklima Nargis, Iqbal M. I. Ismail, Ahsan Habib, Abu Jafar Mahmood
American Journal of Analytical Chemistry (AJAC) , 2016, DOI: 10.4236/ajac.2016.712074
Abstract: Kinetics of homogeneous degradation of Eosin Y (EY), also known as Acid red 87 (CI 45380), are studied, mostly using Fenton’s process, at 30 by monitoring its absorbance at 517 nm (λmax of EY). This process is one of the advanced oxidation processes (AOPs). Mixture of H2O2 and Fe(II) ion in acetate buffer medium (pH 2.74 - 4.56) generates hydroxyl free radicals (?OH) which attack the dye molecules, resulting in degradation of the dye molecules. Results show that the initial rate of EY degradation decreases with the increasing of solution pH because of removal of kinetically important Fe (iron) species through formation of ferric hydroxide. On the other hand, the rate increases with increasing the?concentrations of H2O2, Fe(II) and EY at low solution pH. The initial rate increases with increasing of concentration of H2O2 and, subsequently remains unaffected with further increase of its concentration at a constant Fe(II) concentration because of the enhanced scavenging environment created by H2O2 at its higher concentration. The initial rate also increases with increasing of concentration of Fe(II) at a constant H2O2 concentration and remains unaffected with its further increase. EY concentration also enhances the initial rate at low pH. However, the initial rate is significantly enhanced by UV light. This is because of formation of additional hydroxyl radicals through excitation of the dye molecules by UV light. During the period of experiment, EY in aqueous solution alone hardly suffered any degradation. Degradation mechanism of EY by the Fenton and photo-Fenton’s processes is also discussed. Statistical analysis was used to validate the experimental results. Low values of the standard deviation for both the initial rate and % degradation indicated the consistency of the experimental data.
Is Drotrecogin alfa (activated) for adults with severe sepsis, cost-effective in routine clinical practice?
M Zia Sadique, Richard Grieve, David A Harrison, Brian H Cuthbertson, Kathryn M Rowan
Critical Care , 2011, DOI: 10.1186/cc10468
Abstract: This CEA used data from a prospective cohort study that compared DrotAA versus no DrotAA (control) for severe sepsis patients with multiple organ systems failing admitted to critical care units in England, Wales, and Northern Ireland. The cohort study used case-mix and mortality data from a national audit, linked with a separate audit of DrotAA infusions. Re-admissions to critical care and corresponding mortality were recorded for four years. Patients receiving DrotAA (n = 1,076) were matched to controls (n = 1,650) with a propensity score (Pscore), and Genetic Matching (GenMatch). The CEA projected long-term survival to report lifetime incremental costs per quality-adjusted life year (QALY) overall, and for subgroups with two or three to five organ systems failing at baseline.The incremental costs per QALY for DrotAA were £30,000 overall, and £16,000 for the subgroups with three to five organ systems failing. For patients with two organ systems failing, DrotAA resulted in an average loss of one QALY at an incremental cost of £15,000. When the subgroup with two organ systems was restricted to patients receiving DrotAA within 24 hours, DrotAA led to a gain of 1.2 QALYs at a cost per QALY of £11,000. The results were robust to other assumptions including the approach taken to projecting long-term outcomes.DrotAA is cost-effective in routine practice for severe sepsis patients with three to five organ systems failing. For patients with two organ systems failing, this study could not provide unequivocal evidence on the cost-effectiveness of DrotAA.Severe sepsis is the most common cause of death for patients admitted to critical care [1-3]. Recent international studies suggest that the annual incidence of severe sepsis is 50 to 100 cases per population of 100,000 [4]. Approximately 80% of critical care admissions with severe sepsis have multiple organ systems failing, and the associated hospital mortality is around 50%. Severe sepsis is associated with substantial health
Pakistan Veterinary Journal , 2006,
Abstract: The present study was undertaken to compare five laboratory diagnostic tests for sub-clinical mastitis in cattle and buffaloes and to compute cost, time taken by each test and its ranking for availability, adoptability, interpretability and sensitivity. There were 352 cases with each test type viz. California Mastitis Test (CMT), White Side Test (WST), White Side + Dye (WSTD), Surf Test and Surf + Dye, and 880 cases with each species type (cattle and buffaloes). Result scores (1760 ) for sub-clinical mastitis in each category of negative, trace, single positive, double positive and triple positive by species, and laboratory tests, were analyzed using nonparametric tests. Chi-square statistics showed that CMT was equally effective at both locations (farm vs. laboratory). Correlation further suggested that the association was highly significant. Moreover, cases in category of negative, trace and single positive strongly differed (P<0.05) amongst the laboratory tests. But differences were found vague in double and triple positive categories. However, Chi-square statistics of overall sub-clinical mastitis cases showed that the laboratory tests were significantly different for detecting various categories of sub-clinical mastitis of a cross-tabulation. The present findings uncovered stronger (P<0.05) positive correlation of both the WST and WSTD with CMT, while of Surf Test and Surf + Dye with CMT. Results also suggested that WSTD and Surf + Dye were equally associated with CMT in strength and direction as their counterpart tests WST and Surf Test with CMT and thus its response in efficacy to added dye was not distinct. Species effect on result scores was found negligible (P>0.05). The study further suggested that CMT was the most sensitive test, followed by WST/WSTD and Surf/Surf + Dye. Although, the five tests showed slight discrepancy in the trace category reaction, a strong relationship of Surf Test to CMT, its low cost, easy availability and readily adoptable qualities should spur the relevant authorities to recommend the use of Surf test as a routine practice in dairy farming and add this test in the curriculum of diploma and degree programmes.
Spatial Planning in Ghana: Antecedents and the Role of Local Artisans  [PDF]
Devine Hedidor, Francis Kwesi Bondinuba, Mohammed Abdulai Sadique
Journal of Building Construction and Planning Research (JBCPR) , 2016, DOI: 10.4236/jbcpr.2016.43013
Abstract: This paper explored the antecedents and the role of local artisans in Spatial Planning (SP) activities in Ghana. The paper was based on the results of an inspection of 5896 already built houses at Mepe in the Volta Region of Ghana. A mixed method research approach was used to gather the data through snowball non-probability sampling technique. It enabled the researchers to identify 100 local artisans. Survey questionnaires were used, which was followed by structured interviews with five (5) elders who lived in the town for over 65 years. The results showed that the early houses were built on community lands with mud and thatch clustered with narrow and unnamed alleys. Property owners heavily depended on local artisans for professional guidance, although some artisans were ill-trained and unaware of existing government SP regulations. The study was limited to artisans who practiced at the local community level. The findings showed that many local artisans were poorly trained, resulting in poor workmanship and non-compliance with local planning regulations. The paper recommends the integration of SP into the artisanal curricula at both local and national levels to improve their skills.
Rumination Mediates the Relationship between Infant Temperament and Adolescent Depressive Symptoms
Amy H. Mezulis,Heather A. Priess,Janet Shibley Hyde
Depression Research and Treatment , 2011, DOI: 10.1155/2011/487873
Abstract: This study examined prospective associations between negative emotionality, rumination, and depressive symptoms in a community sample of 301 youths (158 females) followed longitudinally from birth to adolescence. Mothers reported on youths' negative emotionality (NE) at age 1, and youths self-reported rumination at age 13 and depressive symptoms at ages 13 and 15. Linear regression analyses indicated that greater NE in infancy was associated with more depressive symptoms at age 15, even after controlling for child gender and depressive symptoms at age 13. Moreover, analyses indicated that rumination significantly mediated the association between infancy NE and age 15 depressive symptoms in the full sample. When analyzed separately by gender, however, rumination mediated the relationship between NE and depressive symptoms for girls but not for boys. The results confirm and extend previous findings on the association between affective and cognitive vulnerability factors in predicting depressive symptoms and the gender difference in depression in adolescence, and suggest that clinical interventions designed to reduce negative emotionality may be useful supplements to traditional cognitive interventions for reducing cognitive vulnerability to depression. 1. Introduction Adolescent depression is a major mental health problem. Depression increases in the transition to adolescence, such that while fewer than 6% of youth under age 11 will experience a depressive episode, nearly 20% of youth will experience a depressive episode by age 18 [1, 2]. In addition, up to 65% of adolescents report subclinical depressive symptoms at any given time, and extensive research has demonstrated that both mild-to-moderate depressive symptoms and diagnosable depressive episodes predict greater academic and interpersonal problems, substance use, and depressive episodes in adulthood [3, 4]. Adolescent depression also confers risk for future depression, with nearly 70% of adolescents experiencing another episode within five years [5]. Within adolescence, the early to middle adolescent period from ages 11 to 15 is of particular salience to depression researchers. During this time, depression rates surge for all youth and a marked gender difference emerges such that by age 15 girls are twice as likely as boys to become depressed [2]. Extensive research on the etiology of adolescent depression has demonstrated multiple vulnerability factors contributing to the rise in depressive symptoms as well as the emergence of the gender difference in depression during this developmental period.
Synthesis and biological evaluation of some 4-(1H-indol-3-yl)-6-phenyl-1,2,3,4-tetrahydropyrimidin-2-ones/thiones as potent anti-inflammatory agents
Mohammad Amir, Sadique Akhtar Javed, Harish Kumar
Acta Pharmaceutica , 2008, DOI: 10.2478/v10007-008-0028-x
Abstract: Twelve new 4-(1H-indol-3-yl)-6-phenyl-1,2,3,4-tetrahydropyrimidin-2-ones/thiones (7-18) have been synthesized by reacting 1-aryl-3-(1H-indol-3-yl)-2-propen-1-one with urea and thiourea in ethanolic potassium hydroxide. Their structures have been confirmed by IR, 1H NMR and mass spectral data. The compounds were tested for their anti-inflammatory activity. Test results revealed that compounds showed 49.5 to 70.7% anti-inflammatory activity where-as the standard drug ibuprofen showed 86.4% activity at the same oral dose. Four compounds, 4-(1H-indol-3-yl)-6-(4-chlorophenyl)-1,2,3,4-tetrahydropyrimidin-2-one (8), 4-(1H-indol-3-yl)-6-(4-methylphenyl)-1,2,3,4-tetrahydropyrimidin-2-one (10), 4-(1H-indol-3-yl)-6-(4-chlorophenyl)-1,2,3,4-tetrahydropyrimidin-2-thione (14), 4-(1H-indol-3-yl)-6-(4-methylphenyl)-1,2,3,4-tetrahydropyrimidin-2-thione (16), that showed significant anti-inflammatory activity were selected to study their ulcerogenic and lipid peroxidation activities. All tested compounds showed significant reduction in the ulcerogenic potential and lipid peroxidation compared to the standard drug ibuprofen.
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