Children's perspectives on building science models     

Ann Sherman  A. Leo MacDonald 《Education 3-13》2013,41(1):89-98

This study describes the experiences of 10- and 11-year-old students with building science models during a unit on weather. With the teacher, we prepared and gathered materials for the students to use in the building of dynamic physical models demonstrating the key features of the weather concepts they were learning. An important aspect of the approach used in the construction of the models was that students were given a significant amount of time to build and explore their models. Students were interviewed following the completion of the unit and their comments suggest that they began to understand the value of the building activities. The enthusiasm for the activities demonstrated by the students also helped increased the meaning the construction held for them. This enthusiasm combined with an increased confidence helped create an environment where students were excited about science and were better able to display their understanding of concepts.  相似文献   

Infinite sequences and their h-type indices     

Leo Egghe  Ronald Rousseau 《Journal of Informetrics》2019,13(1):291-298

Starting from the notion of h-type indices for infinite sequences we investigate if these indices satisfy natural inequalities related to the arithmetic, the geometric and the harmonic mean. If f denotes an h-type index, such as the h- or the g-index, then we investigate inequalities such as min(f(X),f(Y)) ≤ f((X?+?Y)/2) ≤ max(f(X), f(Y)). We further investigate if: f(min(X,Y)) = min(f(X),f(Y)) and if f(max(X,Y)) = max(f(X),f(Y)). It is shown that the h-index satisfies all the equalities and inequalities we investigate but the g-index does not always, while it is always possible to find a counterexample involving the R-index. This shows that the h-index enjoys a number of interesting mathematical properties as an operator in the partially ordered positive cone (R⁺)^∞ of all infinite sequences with non-negative real values.In a second part we consider decreasing vectors X and Y with components at most at distance d. Denoting by D the constant sequence (d,d,d, …) and by Y-D the vector (max(y_r-d), 0)_r, we prove that under certain natural conditions, the double inequality h(Y-D) ≤ h(X) ≤ h(Y?+?D) holds.  相似文献   

Hong Kong Library Association Mentoring Program: Experience,Challenges and Opportunities     

Leo F. H. Ma  Maggie Mei Ki Wong 《International Information and Library Review》2020,52(2):170-175

Abstract

The Hong Kong Library Association (HKLA) has been the core organization serving the library and information science (LIS) community in Hong Kong since its establishment 62?years ago. It organizes activities and events continually to enrich professional knowledge of LIS professionals in Hong Kong. It has been observed that the number of student members has risen constantly in recent few years. In view of the pressing demand for better support to student members, the HKLA launched the Mentoring Program in 2013 to enhance informal communication between student members and other members of the Association. The Mentoring Program received an overall positive feedback from the local LIS community and made a positive impact to participants, especially mentees. Apart from the successful experience of this program, there are issues that can be improved in sustaining this program in long term. This paper summarizes the experience of implementing the Mentoring Program in the first two years and identifies the challenges and opportunities ahead. The finding indicates that the Mentoring Program was a well-received professional development program for the student members of the Association. However, this program can be further enhanced in terms of mentor solicitation, mentor-mentee eligibility, mentor-mentee relationship, knowledge-based interaction, and program sustainability. The Program Committee may consider collaborating with other LIS agencies to solicit more potential mentors. In view of the population of the potential mentors, it makes very good sense for the past mentees to serve as peer-to-peer partners for non-degree student members. More incentive should be devised to encourage the mentoring pairs in joining library events in addition to the activities related to the Mentoring Program. To facilitate communication and experience sharing among program participants and HKLA members, it is desirable to set up an online discussion platform to address the increasing demand for more opportunities on this. Lastly, it is vital to improve communication among the Program Committee, HKLA Council members and HKLA members. Besides reviewing the operation and management of the Mentoring Program, the Program Committee should also study the feasibility of sustaining this program in the long run. This paper can be served as an empirical study on the implementation of library and information science mentoring programs in one of the major cities in Asian region. The results of the study can be referenced by the LIS community not only locally but also internationally.  相似文献   

Reconstructing Past Social Moods from Paintings: The Eye of the Beheld     

Bogart  Leo 《Int. Journal of Public Opinion Research》2003,15(2):119-133

  相似文献   

Introduction     

Leo Steg 《Journal of The Franklin Institute》1975,300(2):89-96

Energy conversion takes place either in generalized capacitor or generalized resistor networks, that is, C- and R-fields in the sense of Paynterian bondgraphs. Entropy is interpreted as a kind of thermal charge. An electrical example is the difference of conduction and convection associated with mass flow. The generation of entropy in irreversible processes is represented by RS-fields as extension of the simple generalized resistors or R-elements. Thermoelectric power conversion is described by combined RS-fields, and Onsager's symmetry conditions for such fields are derived from the second law of thermodynamics.  相似文献   

A Methodology for Business Policy Courses     

Leo B. Osterhaus 《College Teaching》2013,61(3):233-235

  相似文献   

Early History of Zionism in America,edited by Isidore S. Meyer     

Leo Shpall 《Journal of Jewish Education》2013,79(2)

  相似文献   

Introduction     

Leo Fernig 《Prospects》1973,3(3):325-326

  相似文献   

Diversite et unite dans l'education: Congres Mondial Mixte D'education Comparee     

Leo Fernig 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1978,24(1):68-73

Sans résumé  相似文献   

Effect of 12-week-long aerobic training programme on body composition,aerobic capacity,complete blood count and blood lipid profile among young women     

Dorota Kostrzewa-Nowak  Robert Nowak  Zbigniew Jastrz?bski  Aleksandra Zar?bska  Marta Bichowska  Izabela Drobnik-Kozakiewicz  ?ukasz Radzimiński  Agata Leońska-Duniec  Krzysztof Ficek  Pawe? Ci?szczyk 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2015,25(1):103-113

Background

Numerous data suggest that aerobic-type exercise improves lipoprotein-lipid profiles, cardiorespiratory fitness and body composition in young women. The aim of this study was to evaluate the biological response to high-low impact aerobic fitness among young women.

Materials and methods

Thirty-four young women aged 22 (19-24) years were divided into three groups: underweight (N = 10), normal weight (N = 12) and overweight (N = 12). Aerobic capacity, anthropometry and body composition together with complete blood count and lipid profile were determined before and after completion of a 12-week-long training period.

Results

The training programme caused a significant decrease in weight (by 4.3 kg, P = 0.003), body mass index (by 1.3 kg/m², P = 0.003), free fat mass (by 2.1 kg, P = 0.002), total body water (by 0.4 kg, P = 0.036), percentage of fat (by 3 percent points, P = 0.002), all analyzed skinfolds thicknesses, as well as the lipid profile in overweight group, and no changes in normal weight group. Significant changes in weight (by 4.2 kg, P = 0.005), body mass index (by 0.9 kg/m², P = 0.005), crus skinfold thickness (by 3.3 mm, P = 0.028), and in maximum oxygen uptake (by 2.49 mL/kg/min; P = 0.047) were observed among underweight women. No change in total blood count was observed in all groups.

Conclusion

Twelve-week-long fitness training programme of two alternating styles (low and high impact) has a beneficial effect on overweight young women.Key words: body composition, physical fitness, overweight, women  相似文献