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1.
Kiran?SarvabhotlaEmail author Prasad?Pingali Vasudeva?Varma 《Information Retrieval》2011,14(3):337-353
With the growth of social media, document sentiment classification has become an active area of research in this decade. It
can be viewed as a special case of topical classification applied only to subjective portions of a document (sources of sentiment).
Hence, the key task in document sentiment classification is extracting subjectivity. Existing approaches to extract subjectivity
rely heavily on linguistic resources such as sentiment lexicons and complex supervised patterns based on part-of-speech (POS)
information. This makes the task of subjective feature extraction complex and resource dependent. In this work, we try to
minimize the dependency on linguistic resources in sentiment classification. We propose a simple and statistical methodology
called review summary (RSUMM) and use it in combination with well-known feature selection methods to extract subjectivity.
Our experimental results on a movie review dataset prove the effectiveness of the proposed methodology. 相似文献
2.
Anuradha Bharosay Vivek Vikram Bharosay Kiran Saxena Meena Varma 《Indian journal of clinical biochemistry : IJCB》2018,33(2):178-183
This study was undertaken to evaluate the role of serum neuron specific enolase (NSE) in prediction of disability and neurological worsening in hypertensive ischemic cerebrovascular stroke. 80 hypertensive ischemic stroke patients diagnosed by a neurologist as per WHO definition along with radiological findings suggestive of cerebrovascular stroke and differentiating from hemorrhagic stroke and 60 controls having essential hypertension coming to hospital because of regular checkup or headache but with no neurological disease were included in the study. Neurological disability was assessed by NIHSS at the time of admission (within 72 h from the onset of stroke) and on 7th day after admission and cases were categorized into mild, moderate and severe disability. Venous blood samples were drawn within 72 h from the onset of symptoms. The samples were processed as per the laboratory protocol. The serum NSE samples were analyzed using an enzyme immunoassay based on the sandwich technique. We observed raised serum NSE in hypertensive ischemic stroke (17.4 ± 5.4 ng/ml) with significant association between different hypertensive groups than in hypertensive controls (9.1 ± 0.75 ng/ml). Greater degree of disability was observed in hypertensive stroke patients with raised serum NSE and hypertensive patients with mean serum NSE level of 22.9 ± 3.6 ng/ml and dyslipidemia had greater probability of neurological worsening as compared to those with mean serum NSE level of 12.7 ± 1.2 ng/ml. Serum NSE levels can serve as a peripheral indicator of neuronal damage and assist in the prediction of disability and clinical outcome in hypertensive cerebrovascular ischemic stroke patients. 相似文献
3.
职业技术教育最早被看作是培养产业后备军的途径，后来被看作是提高人力资本构成、生产力和就业的手段，今天，人们又认识到它对人的充分发展具有重要作用。人的发展既是国家发展的手段又是国家发展的目的，发展中国家需要一支有熟练技能和适应性强的劳动大军才能抓住发展机会，然而，发展中国家与发达国家的差距还在继续扩大，部分原因是虽然发展中国家注意到了对人的投资，认识到了职业教育与培训的重要性，但发展速度还太慢。职业教育与培训对于降低失业至关重要，但其作用的充分发挥必须依赖于职业教育与培训自身的改善、政府行为的改善、经济形势的好转和妇女就业领域的扩大等前提条件。 相似文献
4.
Keisha Varma Freda Husic Marcia C. Linn 《Journal of Science Education and Technology》2008,17(4):341-356
Designing effective professional development experiences for technology-enhanced inquiry instruction is the goal of the Technology
Enhanced Learning in Science (TELS) NSF funded Center for Learning and Teaching. In order to provide this type of support
to a large number of teachers, we devised a targeted professional development approach. Participating teachers implemented short inquiry modules that featured interactive scientific visualizations. We collaborated
with 16 schools in eight districts and five states. This paper reports the design, implementation, and refinement of the targeted
approach. Findings from interview data show that teachers faced challenges that are often associated with enacting technology
innovations in K-12 classrooms. The targeted professional development approach addressed the challenges and allowed teachers
to successfully implement the modules in their classrooms. The interview data clarify teachers’ perspectives on how using
technology impacted their teaching practices and their ideas about student learning. This work contributes to a growing body
of literature that identifies and addresses barriers to integrating technology into K-12 classrooms. 相似文献
5.
Bhetariya PJ Madan T Basir SF Varma A Usha SP 《Indian journal of clinical biochemistry : IJCB》2011,26(2):104-119
The medical, agricultural and biotechnological importance of the primitive eukaryotic microorganisms, the Fungi was recognized
way back in 1920. Among various groups of fungi, the Aspergillus species are studied in great detail using advances in genomics and proteomics to unravel biological and molecular mechanisms
in these fungi. Aspergillus fumigatus, Aspergillus flavus, Aspergillus niger, Aspergillus parasiticus, Aspergillus nidulans and Aspergillus terreus are some of the important species relevant to human, agricultural and biotechnological applications. The potential of Aspergillus species to produce highly diversified complex biomolecules such as multifunctional proteins (allergens, antigens, enzymes)
and polyketides is fascinating and demands greater insight into the understanding of these fungal species for application
to human health. Recently a regulator gene for secondary metabolites, LaeA has been identified. Gene mining based on LaeA
has facilitated new metabolites with antimicrobial activity such as emericellamides and antitumor activity such as terrequinone
A from A. nidulans. Immunoproteomic approach was reported for identification of few novel allergens for A. fumigatus. In this context, the review is focused on recent developments in allergens, antigens, structural and functional diversity
of the polyketide synthases that produce polyketides of pharmaceutical and biological importance. Possible antifungal drug
targets for development of effective antifungal drugs and new strategies for development of molecular diagnostics are considered. 相似文献
6.
Usha P. Sarma Preetida J. Bhetaria Prameela Devi Anupam Varma 《Indian journal of clinical biochemistry : IJCB》2017,32(2):124-133
Environmental occurrence of Aspergillus and other fungal spores are hazardous to humans and animals. They cause a broad spectrum of clinical complications. Contamination of aflatoxins in agri-food and feed due to A. flavus and A. parasiticus result in toxicity in humans and animals. Recent advances in aspergillus genomics and aflatoxin management practices are encouraging to tackle the challenges posed by important aspergillus species. 相似文献
7.
8.
Sarah E. Swehla Matthew K. Burns Anne F. Zaslofsky Matthew S. Hall Sashank Varma Robert J. Volpe 《Psychology in the schools》2016,53(4):404-415
Incremental rehearsal (IR) is a highly effective intervention that uses high repetition and a high ratio of known to unknown items with linearly spaced known items between the new items. It has been hypothesized that narrowly spaced practice would result in quick learning, whereas items that are widely spaced would result in longer‐term retention. The current study examined the effect of spacing by teaching vocabulary words to 36 fourth‐grade students. Each student was randomly assigned to a widely spaced IR condition (i.e., one unknown item, one known item, one unknown item, two known items, one unknown item, three known items, and an increase in the number of known items presented each time by one) or an IR condition in which spacing increased exponentially (IR‐Exp; i.e., one unknown item, one known item, one unknown item, two known items, one unknown item, four known items, and one unknown item, eight known items). The results indicated that the students in the study retained twice as much information with the widely spaced IR than with the IR‐Exp condition, but the latter required half as much time. IR and IR‐Exp were equally efficient, but IR continues to be superior to all other flashcard approaches in improving retention. 相似文献
9.
Keisha Varma 《Journal of Science Education and Technology》2014,23(3):381-397
Researchers from multiple perspectives have shown that young students can engage in the scientific reasoning involved in science experimentation. However, there is little research on how well these young students learn in inquiry-based learning environments that focus on using scientific experimentation strategies to learn new scientific information. This work investigates young children’s science concept learning via inquiry-based instruction on the thermodynamics system in a developmentally appropriate, technology-supported learning environment. First- and third-grade students participate in three sets of guided experimentation activities that involve using handheld computers to measure change in temperature given different types of insulation materials. Findings from pre- and post-comparisons show that students at both grade levels are able to learn about the thermodynamics system through engaging in the guided experiment activities. The instruction groups outperformed the control groups on multiple measures of thermodynamics knowledge, and the older children outperform the younger children. Knowledge gains are discussed in the context of mental models of the thermodynamics system that include the individual concepts mentioned above and the relationships between them. This work suggests that young students can benefit from science instruction centered on experimentation activities. It shows the benefits of presenting complex scientific information authentic contexts and the importance of providing the necessary scaffolding for meaningful scientific inquiry and experimentation. 相似文献
10.
Anuradha Bharosay Vivek V. Bharosay Debapriya Bandyopadhyay Ajoy Sodani Meena Varma Haren Baruah 《Indian journal of clinical biochemistry : IJCB》2014,29(3):372-376
Stroke is the third major cause of death worldwide. Elevated plasma concentration of low density lipoproteins and low plasma concentration of high density lipoprotein concentration are associated with an increased risk of atherosclerosis and coronary heart disease but the relation between serum lipids, and cerebrovascular disease is less clear. The aim of this study was to investigate the reliability and accuracy of serum lipid profile in assessing the prognosis/neurological worsening in patients with ischemic and hemorrhagic cerebrovascular stroke. The subjects in the present study comprised of 101 healthy controls and 150 cerebrovascular stroke patients (including 90 with ischemic stroke and 60 with intracerebral hemorrhagic stroke). In both the groups fasting lipid profile was determined within 72 h of the stroke. A statistically significant association was observed (p < 0.001) between the parameters of lipid profile of cases and healthy controls, and also with the prognosis of the stroke. 相似文献