Appealing to Internet-based freelance developers in smartphone application marketplaces     

Jung-Kuei Hsieh  Yi-Ching Hsieh 《International Journal of Information Management》2013

The success of the iPhone has created the smartphone application marketplace as a new business model for freelance developers, with significant potential yields. Attracting and retaining these freelance developers is an important success factor for smartphone platform owners. Therefore, using the viewpoint of freelance developers, this study adopts a discovery-oriented approach to explore antecedents of intentions to maintain a relationship with an incumbent platform. In a relationship commitment sense, freelance developers sustain incumbent relationships because of their calculative and affective commitments. Interview data further suggest that monetary rewards, potential market demand, and switching costs relate to calculative commitment; perceived service quality, identification with the platform owner, and intrinsic rewards are antecedents of affective commitment. The findings from the literature review and field research together produce an integrative framework that offers key insights for the smartphone application market, which can help central actors understand how to retain their external partners.  相似文献   

Student factors related to learning in biomechanics     

ChengTu Hsieh  Duane Knudson 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):398-402

The aim of this study was to identify the student behaviours and characteristics that are related to learning biomechanical concepts. The Biomechanics Concept Inventory (BCI) was given to 53 kinesiology majors before and after an introductory biomechanics class together with a survey of student behaviours to determine factors that assisted in learning. Analysis of scores from 49 students showed significant (P < 0.001) improvement following instruction. Variables that significantly (P < 0.05) and uniquely correlated with improvement were grade point average (r = 0.46) and student interest in biomechanics (r = 0.41). Thirty-one percent of the variance in learning could be accounted for by these two variables, with no distinctive associations with student behaviours like course reading, hours studying, and credits earned in maths and physics. However, grade point average was significantly correlated with several student behaviour variables. Consequently, student learning of biomechanical concepts is likely a complex phenomenon with individual learning related to variables that interact with student interest and overall academic ability.  相似文献   

Does student learning style affect performance on different formats of biomechanics examinations?     

ChengTu Hsieh  Melissa Mache  Duane Knudson 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(1):108-119

Students' learning style preferences have been widely adapted into teaching and learning environments. The purpose of this study was to investigate the relationship between self-reported and assessed learning style preferences (visual, auditory, reading/writing, kinesthetic: VARK) on performance in different types of multiple-choice examinations (T1: text only format and T2: visual format) given in an introductory biomechanics class. Students who enrolled in three biomechanics classes at a state university were recruited to participate in the study. Ninety students (47 males and 43 females) completed a learning style survey and two types of examinations. Results showed that approximately half of the students were assessed and self-reported as kinesthetic for their preferred learning style. There was no significant difference in test performance between students who preferred visual and reading/writing learning styles (self-reported and assessed). These students demonstrated similar learning and comprehension of biomechanical concepts regardless of whether the test material was presented in their preferred sensory mode or not. Interestingly, female students' perceptions of their learning style preference may have a positive effect on the test results when the test is presented in their preferred format.  相似文献   

Proposing ways of evaluating automatic short‐answer markers with multiraters     

Che‐Di Lee  Tsung‐Hau Jen  Hsieh‐Hai Fu  Chun‐Yen Chang 《British journal of educational technology : journal of the Council for Educational Technology》2012,43(3):E73-E76

  相似文献   

Rapid detection of natriuretic peptides by a microfluidic LabChip analyzer with DNA aptamers: Application of natriuretic peptide detection     

Ming-Cheng Lin  Jiraporn Nawarak  Tai-Yuan Chen  Hsien-Yu Tsai  Jung-Feng Hsieh  Supachok Sinchaikul    Shui-Tein Chen 《Biomicrofluidics》2009,3(3)

Rapid detection of brain natriuretic peptide (BNP) concentration can be used for the diagnosis of acute heart failure and for the evaluation of the effectiveness of a clinical therapy. We used the systematic evolution of ligands by exponential enrichment method to develop DNA aptamers for BNP whose sequences were determined by cloning method and consensus sequence analysis. A total of eight conserved sequences was identified. By combining the fluorescent-labeled aptamers with fast protein lab-on-chip analysis, we could achieve quantification of BNP concentrations with high speed, sensitivity, and specificity.  相似文献   

Systematic review of the acute and chronic effects of high-intensity interval training on executive function across the lifespan     

Shu-Shih Hsieh  Ting-Yu Chueh  Chung-Ju Huang  Shih-Chun Kao  Charles H. Hillman 《Journal of sports sciences》2021,39(1):10-22

ABSTRACT

Research regarding the effects of high-intensity interval training (HIIT) on executive function has grown exponentially in recent years. However, there has been no comprehensive review of the current state of literature. Therefore, the aim of this systematic review is to summarize previous research regarding the acute and chronic effects of HIIT on executive function across the lifespan and highlight future research directions. The results indicated that acute bouts of HIIT has a positive effect on inhibition in children/adolescents and adults, and further that chronic HIIT benefits inhibition and working memory in children. More research employing chronic interventions, focusing on middle-aged and older adults, and examining the effects on the working memory and cognitive flexibility domains of executive function are needed. Future research should also focus on a) the use of stronger research designs, b) the effects of HIIT dosage/modality, c) consideration of individual differences, d) possible underlying mechanisms, and e) examining the feasibility of translating HIIT to real-word settings.  相似文献   

Simulation guided design of a microfluidic device for electrophoretic stretching of DNA     

Chih-Chen Hsieh  Tsung-Hsien Lin  Chiou-De Huang 《Biomicrofluidics》2012,6(4)

We have used Brownian dynamics-finite element method (BD-FEM) to guide the optimization of a microfluidic device designed to stretch DNA for gene mapping. The original design was proposed in our previous study [C. C. Hsieh and T. H. Lin, Biomicrofluidics 5(4), 044106 (2011)] for demonstrating a new pre-conditioning strategy to facilitate DNA stretching through a microcontraction using electrophoresis. In this study, we examine the efficiency of the original device for stretching DNA with different sizes ranging from 48.5 kbp (λ-DNA) to 166 kbp (T4-DNA). The efficiency of the device is found to deteriorate with increasing DNA molecular weight. The cause of the efficiency loss is determined by BD-FEM, and a modified design is proposed by drawing an analogy between an electric field and a potential flow. The modified device does not only regain the efficiency for stretching large DNA but also outperforms the original device for stretching small DNA.  相似文献   

Problem-Based Learning for Engineering Students: An Evidence-Based Comparative Study     

Cynthia Hsieh  Lorrie Knight 《The Journal of Academic Librarianship》2008,34(1):25-30

This paper describes two studies, one a pilot and the second, an enhanced study, that compare problem-based learning and lecture-based learning in library instruction for first-year engineering students. Two distinct assessment strategies were used to provide empirical evidence that supports the use of problem-based learning as an effective teaching method. Based on the results of the enhanced study, the authors conclude that problem-based learning leads to better outcomes for the learning styles of engineering students.  相似文献   

Archiving Web-published materials: A needs assessment of librarians,researchers, and content providers     

Kathleen R. Murray  Inga K. Hsieh 《Government Information Quarterly》2008

The Web-at-Risk project is a digital preservation project funded by the Library of Congress as part of the National Digital Information Infrastructure and Preservation Program. The project is developing a Web archiving service to enable curators to build, store, and manage archived collections of Web-published materials captured largely from U.S. federal and state government agency Web sites. In 2005 the project’s 22 curators, as well as librarians and archivists working primarily in academic libraries (n = 43), university researchers (n = 7), and content providers (n = 7) participated in a study to identify their needs in relation to Web archiving. This paper summarizes the issues and challenges these groups face and discusses the need for collaborations among libraries and government entities for preserving Web-published materials.  相似文献   

Comparative studies on the analysis of glycoproteins and lipopolysaccharides by the gel-based microchip and SDS-PAGE     

Jung-Feng Hsieh  Shui-Tein Chen 《Biomicrofluidics》2007,1(1)

In order to determine time efficiency between the gel-based microchip (LabChip) and traditional sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), glycoproteins and lipopolysaccharides were analyzed in this study. After 90 min of gel electrophoresis, glycoproteins (bovine serum albumin, lysozyme, ovalbumin, and apo-transferrin) and fluorescent lipopolysaccharides (LPS-O and LPS-S) under reducing conditions could be analyzed by SDS-PAGE, and it would take (including imaging and analyzing) more than 3 h. The same sample could also be assayed on a Bioanalyzer in combination with the LabChip, and it would only need 30 min from start to finish. The assay software automatically calculated the size and concentration of each separated peak and displayed the results in real time, thus eliminating time-consuming procedures such as imaging and analyzing. Compared to the traditional reducing SDS-PAGE, LabChip has a faster turnaround time.  相似文献