Teacher-student development in mathematics classrooms: Interrelated zones of free movement and promoted actions     

Mohammed Abdul Hussain  John Monaghan  John Threlfall 《Educational Studies in Mathematics》2013,82(2):285-302

This paper applies and extends Valsiner’s ‘zone theory’ (zones of free movement and promoted actions) through an examination of an intervention to establish inquiry communities in primary mathematics classrooms. Valsiner’s zone theory, in a classroom setting, views students’ freedom of choice of action and thought as mediated by the teacher. The extension of this theory adds that teachers’ freedom of choice of action and thought is mediated by ‘significant others’ and also by the actions of students with new freedoms. The paper presents necessary theoretical constructs and provides extracts from lessons and from teacher-teacher collaboration to illustrate the theoretical extension.  相似文献   

A security-embedded infrastructure for Tele-Traffic Speed Control     

Mohammed A. Khasawneh  Mohammad I. Malkawi  Sa’ed M. Hayajneh  Hadeel Y. Qasaimeh 《Journal of The Franklin Institute》2009,346(5):431-448

In this paper we introduce a novel approach, relying on intelligent engineering, whereby the maximum speed limit at which vehicles on the road can cruise is controlled from some central or distributed facility. The system, as designed, leverages the use of the ubiquitous cellular infrastructure to cut down the costs involved that would otherwise accrue as a result of the need to build a dedicated traffic control system.In the new system maximum speed limits are transmitted from a Central Control Facility (CCF) to all stretches of roads and highways dispersed across urban areas in a highly dynamic manner. The system uses information arriving via a dynamic feedback system on prevailing weather conditions, road conditions, and bulk of traffic, amongst others, before it would broadcast maximum speed limit information to various destinations. When deployed in its final release, this will be done using a highly automated system with little human intervention.The work presented in this paper elaborates the TTC Network Design and RSU Network Distribution for the Tele-Traffic Speed Control System, to remotely manage, enforce, and control the maximum speed limit allowed on road stretches in rural and urban areas for different vehicle categories.The new system has been deployed successfully in a laboratory controlled environment on three vehicle categories; one category representing passenger vehicles, another buses and commuter transport, while the third representing trucks and freight traffic. It is expected that when the system is fully deployed on the wireless infrastructure, speed-related traffic accidents will witness a drop by more than 65-70% according to known accident statistics.  相似文献   

Stability of total and free prostate specific antigen in serum submitted to intermittent cold storage conditions     

Asmahan A. EL Ezzi  Mohammed A. EL-Saidi 《Indian journal of clinical biochemistry : IJCB》2009,24(2):166-174

The goal of this study was to determine the stability of Total Prostrate Specific antigen (PSA-T) and Free Prostrate Specific Antigen (PSA-F) in archival serum stored at 4°C and −20°C and subjected to temperature shift due to interruption in power supply. Our study showed that PSA-T was stable up to 285 days and PSA-F was stable for 158 days under these conditions. Since power supply interruption is an unavoidable problem in developing nations, our study has implication on the validity of measurement of PSA-T and PSA-F in serum that was not properly stored due to emergency situations and for certain types of retrospective studies.  相似文献   

An Investigation of User Comments on Facebook Pages of Trinidad and Tobago’s Indian Music Format Radio Stations     

Shaheed Nick Mohammed  Avinash Thombre 《Journal of Radio & Audio Media》2017,24(1):111-129

Starting in the 1990s, the Caribbean two-island nation of Trinidad and Tobago witnessed the establishment of several Indian-music format radio stations, most of which now stream their content on the World Wide Web or otherwise make their content available beyond the range of their terrestrial radio transmitters. The convergence of traditional terrestrial radio with audio streaming technology combined with the spread of high speed broadband connections has expanded the audience of a typical radio station from a few kilometers to a globally dispersed set of listeners who often include those physically displaced from their native cultural programming. The present investigation examines the Facebook comments of domestic and foreign listeners to Indian-music format radio stations from the Republic of Trinidad and Tobago.  相似文献   

Special needs education in the United Arab Emirates (UAE): a systems perspective     

Mohammed Arif  Eman Gaad 《Journal of Research in Special Educational Needs》2008,8(2):111-117

In order to obtain maximum benefits from the educational system, it is imperative that the system should work as a unified coherent unit. Gaad, Arif and Scott (2006) conducted the systems analysis of the United Arab Emirates' (UAE) general education system. They analysed three components of the system in order to assess the development, delivery and evaluation. This paper utilises the same framework to analyse the special needs education (SEN) system in the UAE. Data for the research were collected through observations and semi-structured interviews. Analysis of the data identifies some possibilities for improvement. In the area of development, more teaching and supplemental material specific to special needs education needs to be developed. Currently, teachers are working with what is known as the 'para curriculum'. It is based on the regular textbook; with chapters that are difficult being simplified or removed. In the area of delivery, more training would be beneficial to teachers. The monitoring and evaluation component's analysis points out that the evaluation instrument used currently needs to be modified for special needs education monitoring and additional resources in the area of special needs education would required.  相似文献   

Mechanical Player Load™ using trunk-mounted accelerometry in football: Is it a reliable,task- and player-specific observation?     

Paulo Barreira  Mark A. Robinson  Barry Drust  Niels Nedergaard  Raja Mohammed Firhad Raja Azidin  Jos Vanrenterghem 《Journal of sports sciences》2017,35(17):1674-1681

The aim of the present study was to examine reliability and construct convergent validity of Player Load? (PL) from trunk-mounted accelerometry, expressed as a cumulative measure and an intensity measure (PL · min^–1). Fifteen male participants twice performed an overground football match simulation that included four different multidirectional football actions (jog, side cut, stride and sprint) whilst wearing a trunk-mounted accelerometer inbuilt in a global positioning system unit. Results showed a moderate-to-high reliability as indicated by the intra-class correlation coefficient (0.806–0.949) and limits of agreement. Convergent validity analysis showed considerable between-participant variation (coefficient of variation range 14.5–24.5%), which was not explained from participant demographics despite a negative association with body height for the stride task. Between-task variations generally showed a moderate correlation between ranking of participants for PL (0.593–0.764) and PL · min^–1 (0.282–0.736). It was concluded that monitoring PL^® in football multidirectional actions presents moderate-to-high reliability, that between-participant variability most likely relies on the individual’s locomotive skills and not their anthropometrics, and that the intensity of a task expressed by PL · min^–1 is largely related to the running velocity of the task.  相似文献   

The English Translation of Arabic Puns in the Holy Quran     

Mohammed H. Al Aqad  Ahmad Arifin Bin Sapar  Mohamad Bin Hussin  Ros Aiza Mohd Mokhtar  Abd Hakim Mohad 《Journal of Intercultural Communication Research》2019,48(3):243-256

The pun is a tricky use of a word or phrase which has very different meanings that are closely interrelated, or of words with the same sound but different meanings. The Pun is a term with a dual meaning: “close” using obvious reference, and “far” using obscure reference. The hidden is usually meant. The close meaning is the sooner that comes to the listener’s mind. However, the speaker targets at the far one yet use the close to hide it. Translating the Quran text always raises several serious challenges in translation; these challenges are due to the different translations of puns and the misinterpretations between the intended meanings of a pun with their basic concepts, which could result in a certain amount of ambiguity. The study examines the Quranic corpus and its three versions of English translations. The study utilizes the typology of Delabastita?s for horizontal puns, Nida’s techniques of dynamic and formal equivalent and Newmark’s translation methods. This research attempts to investigate the semantic meaning of puns in the Quran translation and to define the translation techniques applied in translating the Quranic puns from Arabic into English.  相似文献   

Hyperhydration using different hydration agents does not affect the haematological markers of the athlete biological passport in euhydrated volunteers     

Ioanna Athanasiadou  Sven Christian Voss  Wesal El Saftawy  Mohammed Al-Maadheed  Georgia Valsami  Costas Georgakopoulos 《Journal of sports sciences》2020,38(16):1924-1932

ABSTRACT

Athlete Biological Passport (ABP) is an indirect approach, implemented by WADA, aimed at detecting blood manipulation based on abnormal changes in haematological markers. Cases report the use of hyperhydration as masking method during anti-doping urine sample collection which could potentially mask suspicious fluctuations on ABP profiles. This study investigated the hyperhydration effect on haemoglobin concentration, reticulocyte percentage and OFF-hr score (an algorithm based on haemoglobin concentration and reticulocyte percentage), with and without recombinant human erythropoietin (rHuEPO) administration. A five-week clinical study performed; Baseline and rHuEPO Phase. Water and a sports drink were used as hyperhydration agents. To examine the hyperhydration effect on the normal ABP profile per volunteer, hyperhydration was implemented at 0, 24 and 48 hours during the baseline. During the rHuEPO phase, volunteers received Epoetin beta (3000 IU) with hyperhydration to be implemented at 0, 24 and 48 hours after drug administration. Blood and urine samples were collected and analysed according to WADA guidelines. No significant effect on ABP markers was observed due to hyperhydration at any time during the study. Pre- and post-hyperhydration data were not statistically different compared to individual baseline data. In conclusion, hyperhydration does not affect the ABP haematological markers under the examined conditions.  相似文献   

Access and equity in financing higher education: The case of Morocco     

Mohammed Bougroum  Aomar Ibourk 《Prospects》2011,41(1):115-134

This paper explores the higher education financing policy in Morocco in light of the central issue of equity. First, it surveys the current situation, using a critical approach to the present financing policy, and looking at the three dimensions of adequacy, efficiency, and equity. Second, it describes the principal policy challenges in financing higher education. Third, it presents several public policy proposals likely to bring changes to the financing policy in order to meet these challenges. The analysis shows that the sustainability and the equity of the current financing system are undermined by the dysfunctions introduced by the private/public split in the higher education system and the lack of a clear political strategy pertaining to the medium of instruction.  相似文献   

Reliability of laser Doppler,near-infrared spectroscopy and Doppler ultrasound for peripheral blood flow measurements during and after exercise in the heat     

Hui C. Choo  Kazunori Nosaka  Jeremiah J. Peiffer  Mohammed Ihsan  Chow C. Yeo  Chris R. Abbiss 《Journal of sports sciences》2017,35(17):1715-1723

This study examined the test-retest reliability of near-infrared spectroscopy (NIRS), laser Doppler flowmetry (LDF) and Doppler ultrasound to assess exercise-induced haemodynamics. Nine men completed two identical trials consisting of 25-min submaximal cycling at first ventilatory threshold followed by repeated 30-s bouts of high-intensity (90% of peak power) cycling in 32.8 ± 0.4°C and 32 ± 5% relative humidity (RH). NIRS (tissue oxygenation index [TOI] and total haemoglobin [tHb]) and LDF (perfusion units [PU]) signals were monitored continuously during exercise, and leg blood flow was assessed by Doppler ultrasound at baseline and after exercise. Cutaneous vascular conductance (CVC; PU/mean arterial pressure (MAP)) was expressed as the percentage change from baseline (%CVC_BL). Coefficients of variation (CVs) as indicators of absolute reliability were 18.7–28.4%, 20.2–33.1%, 42.5–59.8%, 7.8–12.4% and 22.2–30.3% for PU, CVC, %CVC_BL, TOI and tHb, respectively. CVs for these variables improved as exercise continued beyond 10 min. CVs for baseline and post-exercise leg blood flow were 17.8% and 10.5%, respectively. CVs for PU, tHb (r² = 0.062) and TOI (r² = 0.002) were not correlated (P > 0.05). Most variables demonstrated CVs lower than the expected changes (35%) induced by training or heat stress; however, minimum of 10 min exercise is recommended for more reliable measurements.  相似文献