Teacher-perceived principal leadership styles,decision-making styles and job satisfaction: how congruent are data from Indonesia with the Anglophile and Western literature?     

Hasan Hariri  Murray Prideaux 《School Leadership & Management》2016,36(1):41-62

School leadership is seen as important for both schools and for government and private policy-makers. The relationships between teacher-perceived principal leadership styles, teacher-perceived principal decision-making styles and teacher-perceived job satisfaction in schools in Lampung Province, Indonesia were examined. Data were collected by questionnaires from 475 teachers. This paper uses Indonesian data, but the relationships studied will be of wider interest to school stakeholders in Indonesia and to a wider global readership. Considerable effort was placed on the collection of robust data to address existing gaps in the literature about these relationships. The data are available to be shared with other interested parties. Findings suggest that five variables (of the nine variables that were studied) can significantly (p?相似文献   

Factors affecting teachers' gain in understanding the nature of science     

Victor Y. Billeh  Omar E. Hasan 《科学教学研究杂志》1975,12(3):209-219

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The solutions of vibration control problems using artificial neural networks     

Hasan Alli  Ay?egül Uçar 《Journal of The Franklin Institute》2003,340(5):307-325

This paper introduces an alternative method artificial neural networks (ANN) used to obtain numerical solutions of mathematical models of dynamic systems, represented by ordinary differential equations (ODEs) and partial differential equations (PDEs). The proposed trial solution of differential equations (DEs) consists of two parts: The initial and boundary conditions (BCs) should be satisfied by the first part. However, the second part is not affected from initial and BCs, but it only tries to satisfy DE. This part involves a feedforward ANN containing adjustable parameters (weight and bias). The proposed solution satisfying boundary and initial condition uses a feedforward ANN with one hidden layer varying the neuron number in the hidden layer according to complexity of the considered problem. The ANN having appropriate architecture has been trained with backpropagation algorithm using an adaptive learning rate to satisfy DE. Moreover, we have, first, developed the general formula for the numerical solutions of nth-order initial-value problems by using ANN.For numerical applications, the ODEs that are the mathematical models of linear and non-linear mass-damper-spring systems and the second- and fourth-order PDEs that are the mathematical models of the control of longitudinal vibrations of rods and lateral vibrations of beams have been considered. Finally, the responses of the controlled and non-controlled systems have been obtained. The obtained results have been graphically presented and some conclusion remarks are given.  相似文献   

Characterization of lectins and their specificity in carcinomas—An appraisal     

Asma Farhat Sherwani  Sameena Mohmood  Fauzia Khan  Rizwan Hasan Khan  Md. Asim Azfer 《Indian journal of clinical biochemistry : IJCB》2003,18(2):169-180

Lectins, a group of specific glycoproteins present in animal as well as plant cells, are used as differentiating markers to study cancers and metastatic cell lines. This property of lectins depends on the process of cellular glycosylation. Glycosylation of some of the extracellular membrane proteins and lipids maintains the cell/cell and cell/matrix interactions. Chemical alterations in glycosylation play an important role in the metastatic behavior of tumor cells. Carbohydrate residues of the membrane glycoproteins can be detected using lectins due to their binding specificity to carbohydrates. Lectins, therefore have gained an importance in the field of cancer research. Galectins, a specialized group of lectin like proteins that are Ca+ independent and galactoside binding, are also considered as differentiation markers in some specific cancers like the carcinomas of thyroid. Thus the use of lectins and galectins to identify specific carbohydrates present on cell surface help in invasion and metastasis processes.  相似文献   

Serum and platelet sialic acid in acute myocardial infarction     

P. K. Nigam  V. S. Narain  Naveen Chandra  V. K. Puri  R. K. Saran  S. K. Dwivedi  M. Hasan 《Indian journal of clinical biochemistry : IJCB》1995,10(2):106-109

Blood samples from 39 patients with acute myocardial infarction and 15 healthy controls were analysed for serum and platelet sialic acid. Serum sialic acid levels in patients with acute myocardial infarction were significantly higher than controls (mean 2.7±0.46 μmol/ml Vs. 1.91±0.17 μmol/ml respectively). Levels of serum orosomucoid, an acute phase reactant, containing sialic acid, were also higher in these patients, suggesting a possible non-specific mechanism of increase in serum sialic acid concentration. In contrast, platelets contained significantly less sialic acid in patients with acute myocardial infarction than control (26.73±1.57 nmol/mg protein and 31.97±2.68 nmol/mg protein respectively).  相似文献   

Serum lipid profile in patients with acute myocardial infarction     

P. K. Nigam  V. S. Narain  M. Hasan 《Indian journal of clinical biochemistry : IJCB》2004,19(1):67-70

Serum lipids and lipoproteins were estimated in 29 patients with acute myocardial infarction during acute phase (day 1,2,3), predischarge and after three months. Serum total lipids, total cholesterol (TC) and LDL-cholesterol (LDLc) showed no significant change during the hospital stay and three months followup. HDL-cholesterol (HDLc), however, started falling from day 2 onwards with statistically significant reduction at pre-discharge and remained so at 3 months. The ratios of TC/HDLc and LDLc/HDLc showed significant increase on predischarge day as compared to day 1. Serum triglycerides also showed an increasing trend after myocardial infarction with a significant increase on day 3 and predischarge as compared to day 1. it is concluded that the optimum time for assessment of serum lipid profile in patients with myocardial infarction seems to be within 24 hours of the acute episode.  相似文献   

Protective effect of ascorbic acid against oxidative damage induced by hydrogen peroxide in cultured human peripheral blood lymphocytes     

Yasir Hasan Siddique  Tanveer Beg  Mohammad Afzal 《Indian journal of clinical biochemistry : IJCB》2009,24(3):294-300

Hydrogen peroxide is one of the reactive oxygen species for cellular injury. It is overproduced during oxidative stress and is known to damage proteins, nucleic acids and cell membranes. The present study was aimed to study the protective effect of ascorbic acid against the toxic doses of hydrogen peroxide using lipid peroxidation and cytokinesis blocked micronucleus assay. Hydrogen peroxide was studied at 50, 100 and 200μM and was found to increase a dose dependent increase in lipid peroxidation and micronuclei frequency. The treatment of 100 and 200μM of hydrogen peroxide separately along with 20, 40 and 80μM of ascorbic acid showed a dose dependent decrease in the lipid peroxidation and micronuclei frequency. The results suggest a protective effect of ascorbic acid against the hydrogen peroxide induced oxidative damage in cultured human peripheral blood lymphocytes.  相似文献   

Back to the future for KM: the case for sensible organisation     

Hasan  Helen 《知识管理研究与实践》2008,6(1):26-30

Knowledge Management Research & Practice - There are many times in our brave new web-based world that we seem to have lost the art of making common sense decisions and judgements. The current...  相似文献   

Ruth Towse and Christian Handke (eds): Handbook on the digital creative economy     

Hasan Bakhshi 《Journal of Cultural Economics》2016,40(3):359-363

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Cytotoxicity and Apoptosis Inducing Activities of 2-Amino-4H-chromene-3-carbonitrile Derivatives Loaded on Gold Nanoparticles Against Human Breast Cancer Cell Line T47D     

Zahra Saffari  Maryam Farahnak Zarabi  Hasan Aryapour  Alireza Foroumadi  Ali Farhangi  Soheil Ghassemi  Azim Akbarzadeh 《Indian journal of clinical biochemistry : IJCB》2015,30(2):140-149

Chemotherapy drugs, used for prevention of uncontrolled cell proliferation in certain tissues as well as inducing apoptosis in tumor cells, are important candidates for treatment of cancer. The synthesized 2-amino-4H-chromene-3-carbonitrile derivatives effective on cancerous cells resistant to other drugs such as Paclitaxel were used due to their ability in induction of apoptosis. The growth inhibitory and inducing apoptosis activities were determined. In order to make it target-oriented, the best compound was conjugated with gold nanoparticles (NPs) by aspartic acid with chemical reduction method. Cytotoxicity effect of 2-amino-4H-chromene-3-carbonitrile derivatives against the T47D breast cancer cell line was determined by MTT assay. The synthesis of gold NPs was confirmed by transmission electron microscopy, UV–Vis and dynamic light scattering. To assess the effects of compounds on the process of apoptosis, staining methods with acridine orange–ethidium bromide and Hoechst staining by fluorescence microscopy and DNA fragmentation by the diphenylamine method were used. The synthesized compounds containing two NH₂ groups on benzene rings, demonstrated more cytotoxicity effect. The effect of conjugation with gold NPs and the induction of apoptosis were studied with the best compound. The cytotoxicity effects of the synthesized 2-amino-4H-chromene-3-carbonitrile compounds were changed by replacement of NO₂ group on thiol ring with different chemical groups on the benzene ring. Analyses of treated cell lines by conjugated and non-conjugated forms of compounds verified their ability in inducing apoptosis while conjugated form demonstrated higher apoptosis.  相似文献