On the stability of stochastic chemical system

The stability of stochastic chemical system is considered. The definitions of almost sure stability and mean square stability and the corresponding stability theorems are presented and discussed. Examples concerning the stability of a two tank water heating system and a well-stirred reactor tank with random flows are studied in detail.     

Challenges Faced by Subject Librarians in an Academic Library and Initiatives Toward Overcoming Them: UPM Library Experience

ABSTRACT

Subject Librarians play an important role in an academic library, a role which it is crucial to study. There have been many published studies that have highlighted the lack of evidence on the competencies of Subject Librarians. This paper discusses the challenges faced by the Subject Librarians of the Universiti Putra Malaysia Library. The aim was to gather information from published documents regarding the experiences and practices carried out in efforts to increase the competencies of Subject Librarians. The outcomes from this conceptual paper serve as an important instructional tool for the training and development of Subject Librarians. The results might also provide guidance for the implementation of a similar program or relevant problem-solving plans for other libraries in the region.     

Effect of telenursing on aging perception of Iranian older adults

Background and purpose: The perception of aging is one of the independent predictors of functional disability and mortality in the aged ones, this study was conducted to compare the follow-up of a training program with the use of two in-person and telenursing methods on the perception of aging of the elderly, covered by the comprehensive health centers in Ahvaz city.

Materials and Methods: This quasi-experimental study involved systematic random sampling conducted on 60 elderly persons (aged 60–75 years) who were referred to in Ahvaz. A training program was conducted for all elderly persons for 3 weeks (three sessions per week), which was accompanied with 2 months of six follow-ups for the telephonic follow-up group (Tele-nursing), and two follow-ups for in-person follow-up group. The data were collected with the use of demographic form, Abbreviated Mental Test (AMT), and The Brief Aging Perceptions Questionnaire (B-APQ). Elderly completed the questionnaire at the beginning of the study and 8 weeks later. The data were subsequently analyzed with SPSS software; and P values less than 0.05 were considered significant.

Results: Based on the results, the mean score of perception of aging increased in the study groups after the intervention. This increase was statistically significant only in the intervention group.

Discussion and Conclusion: The telephonic follow-up was more effective on Increasing the perception of aging compared with the in-person follow-up. Therefore, using this method is recommended for the elderly.     

AGREED SYLLABI AND UN-AGREED VALUES: RELIGIOUS EDUCATION AND MISSED OPPORTUNITIES FOR FOSTERING SOCIAL COHESION

ABSTRACT:  Religious education (RE) has often found itself at the centre of debates about education's role in promoting social cohesion in contemporary multi-religious societies. The paper considers RE's relationship to religious plurality within the broader context of politics of curriculum and debates on pluralism. Drawing upon the recent works on the history of religion and using the teaching of the histories and cultures of Muslims in RE as a case study, it argues that RE has yet to fulfill its potential in this regard. The paper examines reasons for this and recommends alternative approaches to content which may help RE rise to the challenges posed above.     

A culturally-adaptive Iranian version of the Questionnaire on Teacher Interaction to investigate English teachers’ interpersonal behaviour

We investigated Iranian secondary-school English teachers’ interpersonal behaviour with a validated culturally-adaptive Iranian version of the Questionnaire on Teacher Interaction. Data were collected from 971 Iranian secondary-school students (398 students participated in the pilot study and 573 students in the main study) and 55 Iranian secondary-school English teachers (23 teachers participated in the pilot study and 32 in the main study). The construction of the instrument started with an open-ended questionnaire followed by semi-structured interviews to prepare items for the questionnaire. Next, expert judgement, pilot administration of the questionnaire and statistical analyses ensured its reliability and construct validity before final administration of the questionnaire to the main participants followed. The study supported the validity and reliability of the questionnaire and confirmed its usability in the Iranian secondary-school context. Furthermore, the results indicated that the students perceived their English teachers as being Tolerant and Authoritative, showing higher degrees of friendship, leadership and understanding behaviour and relatively low levels of uncertain and dissatisfied behaviour. The results showed a discrepancy between students’ perceptions of actual and ideal teacher interpersonal behaviour. Also students’ perceptions of their actual teachers’ interpersonal behaviour were significantly different from those of the teachers’ self-perceptions. One important implication of this study is that the QTI can be used in secondary-school contexts as a valuable feedback instrument to encourage teachers to reflect on their performance and improve their interpersonal behaviour as a part of their professional development.     

Children’s metabolic expenditure during object projection skill performance: New insight for activity intensity relativity

Objective: To examine children’s energy expenditure (EE) during object projection skill performance at three intensity intervals. Methods: Children’s (42, Mage = 8.1) average metabolic equivalents of task (METs) were calculated using a COSMED K4b2 while they repeatedly performed blocks of kicking, throwing (overhand), and striking (two-handed) during 6, 12, and 30-s interval conditions. A repeated-measures analysis of covariance examined differences in METs while controlling for skill level. Results: Data indicated a main effect for interval condition (df = 2, 123, F = 94.36, p <.001, η2 = .605). Post hoc t-tests demonstrated decreasing performance interval times yielded progressively higher METs (p <.001) across the three conditions (30s = 4.5±0.8 METs, 12s = 6.3±1.3, 6s = 8.3±1.6). There also was a main effect for sex (df = 1,120, F = 52.28, p <.001 η2 = .305). Boys demonstrated higher METs at each performance interval (p <.001). Conclusion: Skill practice with a maximum of one trial every 30s resulted in the equivalent of at least moderate physical activity (>4.0 METs) and intervals of 6s demonstrated vigorous physical activity (>7.0 METs). Practicing/performing object projection skills, even at intervals that allow for adequate instruction and feedback (i.e., 1 trial/30s), promotes MVPA in children.     

An integrated group decision-making process for supplier selection and order allocation using multi-attribute utility theory and linear programming

Supplier selection is a complex multi-criteria problem including both quantitative and qualitative factors. In order to select the best suppliers it is necessary to make a trade-off between these factors, some of which may be in conflict and may also be uncertain. In this problem if suppliers have capacity or other different constraints, two problems will exist: which suppliers are best and how much should be purchased from each selected supplier.In this paper an integrated approach of multi-attribute utility theory (MAUT) and linear programming (LP) is proposed for rating and choosing the best suppliers and defining the optimum order quantities among selected ones in order to maximize total additive utility. A numerical example is proposed to illustrate an application of the proposed method.     

On optimization of circular fins with heat generation

The problem of minimizing the maximum temperature of a purely conducting circular fin with heat generation is studied via a variational technique. An exact solution is obtained for an arbitrary heat source distribution and a general non-linear heat conductivity. The problem of minimum weight design of convecting circular fin is then considered. An exact solution for temperature distribution and shape of the optimum fin with constant heat generation is obtained and discussed.     

Design of Stable 2-D Recursive Filters by Generation of VSHP Using Terminated n-Port Gyrator Networks

An n-port gyrator, terminated by s₁-type capacitors in m₁-ports, by s₂-type capacitors in the next m₂-ports and by resistors in the remaining (n-m₁-m₂)-ports is considered. The determinant of the admittance matrix of the network can be made to yield VSHP (a two-variable Hurwitz polynomial without non-essential singularities of the second kind) under certain conditions involving the sub-determinants of the gyrator matrix. With the gyrator constants as variables and the above conditions as constraints, some 2-D stable low-pass filters have been designed using a suitable optimization procedure. The method is illustrated by examples.