Exploring the immediate and short-term effects of peer advice and cognitive authority on Web search behavior     

Jiqun Liu  Yiwei Wang  Soumik Mandal  Chirag Shah 《Information processing & management》2019,56(3):1010-1025

An individual's Web search behavior can be influenced by a number of factors, including features and functions of a search engine as well as search education. In contrast to the long-lasting attention to the algorithm and interface dimensions of search, there is a lack of research concerned with the potential effects of user education on search behavior. To address this gap, we ran a three-session field-lab-combined study to examine the effects of user education from two distinct sources – peer advice and cognitive authority (operationalized as video-based student's advice and expert's advice respectively) – on Web search behavior in two different search task scenarios (i.e., factual specific and factual amorphous tasks). We also tested if these behavioral effects persist for a short period of time when the explicit search tips are removed. Using 185 task session data generated by 31 participants in two field and one lab sessions, this study demonstrates that: (1) both peer advice and cognitive authority are effective in stimulating immediate behavioral changes in Web search; (2) the immediate behavioral impact of search advice is broader in factual amorphous task than in factual specific task; (3) framing search tips as the advice from cognitive authority is more likely to generate continuing, short-term effects on Web search behaviors. This research has implications for the design of task-aware user education as well as the study of users’ interactions with IR systems in general.  相似文献   

Sickle Cell Trait Presenting as Chronic Calcific Pancreatitis with Pseudocyst- A Case Report     

Seema Shah  Sunil Jondhale  Rachita Nanda  Suprava Patel  Eli Mohapatra  Anil Kumar Goel 《Indian journal of clinical biochemistry : IJCB》2021,36(2):239

Sickle cell disease is known to cause acute pancreatitis either due to gall stones obstructing the pancreatic duct or by vaso-occlusive mechanism. However chronic pancreatitis is a very rare complication in sickle cell anemia. We report a case of sickle cell trait presenting with chronic pancreatitis with pseudo cyst. USG abdomen and CT abdomen confirmed the diagnosis of chronic calcific pancreatitis with pseudocyst. Etiological work up for other causes did not reveal anything except sickle cell trait. This case represents a rare association between chronic calcific pancreatitis and sickle cell trait.  相似文献   

Biochemical Indicator of Sickle Cell Disease: Preliminary Report from India     

S. Pandey  A. Sharma  S. Dahia  V. Shah  V. Sharma  R. M. Mishra  Sw. Pandey  R. Saxena 《Indian journal of clinical biochemistry : IJCB》2012,27(2):191-195

Blood biochemistry has significant effect on pathophysiology of human body. Recently few studies found the association of biochemical abnormalities in sickle cell patients. Sickle cell disease showed clinical variability where African ancestors have severe phenotype than Indian sicklers. Our aim was to evaluate the biochemicals in sickle cell patients and their effect on severity. Here we present the comparative biochemical levels in sickle cell patients as well as controls. Sickle cell patients diagnosed by HPLC and biochemical analysis done by Beckman-auto analyzer. T test applied for statistical analysis. Result showed the renal abnormality lesser in patients and related biochemical within the normal range and statistically not significant. Electrolytes, hepatic enzymes, alkaline phosphatase and glucose were elevated and statistically significant (P value <0.05). Observation of the study concludes the biochemical abnormality play a significant role in sickle cell patient’s physiopathology and can be used to management of the disease.  相似文献   

Becoming a teacher: Transitions from training to the classroom in the NWFP,Pakistan     

Jo Westbrook  Nazneen Shah  Naureen Durrani  Clare Tikly  Wazim Khan  Máiréad Dunne 《International Journal of Educational Development》2009

This paper addresses issues related to the effectiveness of teacher education in Pakistan in the North West Frontier Province (NWFP), through a small scale collaborative research study in two state secondary schools, one girls’ and one boys’. The aim was to explore how newly qualified teachers manage their transition from student teachers to classroom teachers. In teasing out the relationship between teacher training experiences and classroom practice, we highlight the importance of greater consideration of the social and professional contexts of the school within training programmes as a means to make sustained improvements in the quality of classroom teaching and learning.  相似文献   

Concept drift detection and adaptation with hierarchical hypothesis testing     

Shujian Yu  Zubin Abraham  Heng Wang  Mohak Shah  Yantao Wei  José C. Príncipe 《Journal of The Franklin Institute》2019,356(5):3187-3215

A fundamental issue for statistical classification models in a streaming environment is that the joint distribution between predictor and response variables changes over time (a phenomenon also known as concept drifts), such that their classification performance deteriorates dramatically. In this paper, we first present a hierarchical hypothesis testing (HHT) framework that can detect and also adapt to various concept drift types (e.g., recurrent or irregular, gradual or abrupt), even in the presence of imbalanced data labels. A novel concept drift detector, namely Hierarchical Linear Four Rates (HLFR), is implemented under the HHT framework thereafter. By substituting a widely-acknowledged retraining scheme with an adaptive training strategy, we further demonstrate that the concept drift adaptation capability of HLFR can be significantly boosted. The theoretical analysis on the Type-I and Type-II errors of HLFR is also performed. Experiments on both simulated and real-world datasets illustrate that our methods outperform state-of-the-art methods in terms of detection precision, detection delay as well as the adaptability across different concept drift types.  相似文献   

‘We are equals’; datum or delusion: perceptions of Muslim women academics in three Malaysian universities     

Saeeda Shah 《British Journal of Sociology of Education》2018,39(3):299-315

Islam underlines equality between women and men regarding their spiritual and intellectual potential. However, given interpretations of religious texts are often availed to suppress women in most Muslim societies, with serious implications for gender equality in the domestic and the professional spheres. This article draws on data from a study of Muslim women academics from three Malaysian universities to highlight the impact of dominant discourses on these women’s professional lives and their perceptions of gender equality, and discusses its implications for their professional journeys. The article argues that the feudal patriarchal structures of most Muslim societies, reinforced by vested interpretations of religious texts, validate a powerful discourse of male authority which contributes to the perception that submitting to male authority is a Muslim woman’s religious obligation. The seductive power of these discourses couched in religious authority influences the terms of their professional engagement and their conceptualisations and understanding of gender equality.  相似文献   

Association of Vitamin D Receptor (FokI and BsmI) Gene Polymorphism with Bone Mineral Density and Their Effect on 25-Hydroxyvitamin D Level in North Indian Postmenopausal Women with Osteoporosis     

Israr Ahmad  Tabrez Jafar  Farzana Mahdi  Md. Arshad  Siddharth Kumar Das  Shah Waliullah  Abbas Ali Mahdi 《Indian journal of clinical biochemistry : IJCB》2018,33(4):429-437

Osteoporosis is a systemic disease with a strong genetic component. Vitamin D receptor (VDR) has been suggested as a candidate gene for osteoporosis. Therefore the present study was aimed to investigate the pattern of allelic variants of VDR gene polymorphism (FokI and BsmI), its influence on vitamin D levels and bone mineral density (BMD) in North Indian postmenopausal women with osteoporosis for possible genetic association. 254 postmenopausal osteoporotic women and 254 postmenopausal non osteoporotic women were included in the study. VDR FokI and BsmI gene polymorphism gene were assessed by the PCR-RFLP method. Serum 25-hydroxyvitamin D was measured by the ELISA. BMD at the L₁–L₄ lumbar spine, hip, forearm and femoral neck was assessed by dual energy X-ray absorptiometry. The average BMD at spine and hip in postmenopausal women with bb and spine, hip, femoral neck and forearm with ff genotype had significantly low BMD. The frequency of ff genotype and f allele was significantly higher in postmenopausal osteoporotic women when compared with postmenopausal non osteoporotic women. However, no significant association was found between the genotypes and vitamin D levels. Our study reveals that VDR gene FokI and BsmI polymorphism is significantly associated with low bone mineral density. Therefore the ff genotype and f allele of VDR FokI gene may be used as an important risk factor for osteoporosis.  相似文献