Total Factor Productivity and R&D Capital in Manufacturing Industries

This study analyzes total factor productivity in manufacturing industries for a sample of OECD countries. The estimates of Malmquist indexes clearly indicate that research and development (R&D) capital is an important determinant of productivity growth in manufacturing industries. The empirical results also show that it is the pace, not the intensity, of R&D investment that is significantly related to the extent to which R&D capital formation contributes to output growth. Furthermore, this study finds that productivity gains in manufacturing industries depend importantly on R&D spillovers as well.

English for university administrative work: English officialization policy and foreign language learning motivation

This study examines how the English officialization policy of higher education in an EFL context interplays with administrative workers' motivational orientations towards English learning. The data consisted of questionnaire responses of 117 administrative members with undergraduate degrees and qualitative interviews with 9 who answered the questionnaires. The descriptive and correlation analyses showed that the participants interested in learning English-speaking countries' cultures did not perceive much benefit of the English officialization policy (EOP) in increasing their motivation to learn English. On the contrary, those who appreciated the EOP tended to be motivated to learn English for external rewards. A striking finding was that those who related the EOP to increased motivation also showed a lack of motivation to learn English. Also noteworthy was that their motivation correlated significantly with their own perceived English speaking competence. The results corroborate the significant role of the perception of English speaking competence and the context of English use in language learning motivation at the post-tertiary level. The participants expressed feelings of confusion regarding the role of English in everyday work performance. The implications of these findings are discussed with a view toward the enhanced implementation of EOP policy in an EFL context.open

Technical Efficiency in the Iron and Steel Industry: A Stochastic Frontier Approach

In this paper we examine the technical efficiency of firms in the iron and steel industry and try to identify the factors contributing to the industry's efficiency growth, using a time-varying stochastic frontier model. Based on our findings, which pertain to 52 iron and steel firms over the period of 1978-1997, POSCO and Nippon Steel were the most efficient firms, with their production, on average, exceeding 95 percent of their potential output. Our findings also shed light on possible sources of efficiency growth in the industry. If a firm is government-owned, its privatization is likely to improve its technical efficiency to a great extent. A firm's technical efficiency also tends to be positively related to its production level as measured by a share of the total world production of crude steel. Another important source of efficiency growth identified by our empirical findings is adoption of new technologies and equipment. Our findings clearly indicate that continued efforts to update technologies and equipment are critical in pursuit of efficiency in the iron and steel industry.

Dialogic interactions in the English-mediated classroom: A case study of a social science class for engineering students in Korea

In this paper, we explore the role of dialogic interactions in enhancing L2 undergraduate students' classroom participation at a university in South Korea. Previous studies on English-mediated instruction (EMI) have focused primarily on the efficiency of instruction, as evaluated in terms of the skills and proficiency levels of the students or instructors, based on the assumption that L2 linguistic competence is the primary prerequisite for successful EMI classes. However, drawing upon survey and interview data of students' perceptions of dialogic teaching and classroom observation data, we demonstrate the success of dialogic teaching. Our findings suggest that L2 speakers can participate effectively in interactions in English when the class is designed systematically to allow multiple responses built upon their previous knowledge.open

Adverse childhood experiences and the associations with depression and anxiety in adolescents

Objectives There has been increasing attention to adverse childhood experiences (ACEs) among adolescents in the U.S because ACEs may result in severe mental health issues. Although associations between ACEs and mental health have been explored, research on how different types or combinations of ACEs render different impacts on adolescents is limited. Therefore, this study aims to (a) examine latent classes of ACEs among adolescents who have experienced at least one ACE and (b) investigate associations of each latent group of ACEs with mental health problems, depression and anxiety. Method Questionnaires on ACEs and depression/anxiety from the 2016 National Survey of Children’s Health (NSCH) were used, and a total of 11,437 adolescents aged 10–17 years were included in this study. For analyses, latent class analysis (LCA) was implemented to identify the number and types of classes, which are pertinent to represent the heterogenous combinations of ACEs. Moreover, chi-square tests and ordinal regression were performed to investigate the associations of class memberships within ACEs with depression/anxiety. Results The LCA found four class memberships within ACEs: Multiple High-Risk, Broken Family, Income Hardship, and Multiple Low-Risk. These classes displayed differences in depression/anxiety. For both pre-existing and current conditions of depression/anxiety, the most prominence has been found in the Multiple High-Risk, followed by the Multiple Low-Risk, the Broken Family, and the Income Hardship, in order. Conclusions These differences among the classes indicate that understanding of ACEs and interventions should be based on considering latent classes of ACEs

Physical characterization of amorphous In-Ga-Zn-O thin-film transistors with direct-contact asymmetric graphene electrode

High performance a-IGZO thin-film transistors (TFTs) are fabricated using an asymmetric graphene drain electrode structure. A-IGZO TFTs (channel length = 3 μm) were successfully demonstrated with a saturation field-effect mobility of 6.6 cm2/Vs without additional processes between the graphene and a-IGZO layer. The graphene/a-IGZO junction exhibits Schottky characteristics and the contact property is affected not only by the Schottky barrier but also by the parasitic resistance from the depletion region under the graphene electrode. Therefore, to utilize the graphene layer as S/D electrodes for a-IGZO TFTs, an asymmetric electrode is essential, which can be easily applied to the conventional pixel electrode structure. © 2014 Author(s).1

Optimal set of grid size and angular increment for practical dose calculation using the dynamic conformal arc technique: a systematic evaluation of the dosimetric effects in lung stereotactic body radiation therapy

Purpose To recommend the optimal plan parameter set of grid size and angular increment for dose calculations in treatment planning for lung stereotactic body radiation therapy (SBRT) using dynamic conformal arc therapy (DCAT) considering both accuracy and computational efficiency. Materials and methods Dose variations with varying grid sizes (2, 3, and 4 mm) and angular increments (2°, 4°, 6°, and 10°) were analyzed in a thorax phantom for 3 spherical target volumes and in 9 patient cases. A 2-mm grid size and 2° angular increment are assumed sufficient to serve as reference values. The dosimetric effect was evaluated using dose–volume histograms, monitor units (MUs), and dose to organs at risk (OARs) for a definite volume corresponding to the dose–volume constraint in lung SBRT. The times required for dose calculations using each parameter set were compared for clinical practicality. Results Larger grid sizes caused a dose increase to the structures and required higher MUs to achieve the target coverage. The discrete beam arrangements at each angular increment led to over- and under-estimated OARs doses due to the undulating dose distribution. When a 2° angular increment was used in both studies, a 4-mm grid size changed the dose variation by up to 3–4% (50 cGy) for the heart and the spinal cord, while a 3-mm grid size produced a dose difference of \u3c1% (12 cGy) in all tested OARs. When a 3-mm grid size was employed, angular increments of 6° and 10° caused maximum dose variations of 3% (23 cGy) and 10% (61 cGy) in the spinal cord, respectively, while a 4° increment resulted in a dose difference of \u3c1% (8 cGy) in all cases except for that of one patient. The 3-mm grid size and 4° angular increment enabled a 78% savings in computation time without making any critical sacrifices to dose accuracy. Conclusions A parameter set with a 3-mm grid size and a 4° angular increment is found to be appropriate for predicting patient dose distributions with a dose difference below 1% while reducing the computation time by more than half for lung SBRT using DCAT

The Effect Of Brand Experience Provider On Brand Experience: Focus On Korean Cosmetic Brand Shop

This present research distinguishes brand experience providers of cosmetic companies that include three elements: Brand identity elements of cosmetic brand shops (feminine and environmental-friendly brand identity); Marketing mix elements (level of iconic product, level of steady-seller product, reasonable pricing, convenience of location, quality of additional service); Cosmetic brand store elements (effective product assortment, atmosphere of a store, availability of testers, proficiency of consultants). This paper aims to explore these elements and the effect of brand experience provider on all brand experience dimensions; sensory, affective, intellectual, and behavioral experience. After the review of extant studies, we propose 11 hypotheses. Based on the collected 295 consumers of experienced cosmetic brand shop, the proposed model is testified with the SPSS 15.0 and AMOS 7.0 is supported. According to the result of empirical analysis, it turns out that, in terms of characteristics of brand experiential provider, 'feminine brand identity', 'iconic product', 'steady seller product', 'convenient location', 'additional service quality', 'assortment', 'atmosphere', 'self-tester', and 'consultant' affected the customers' holistic brand experience of cosmetic brand shop. However, 'environmental-friendly brand identity', 'reasonable price' results to have no influence on the holistic brand experience of brand of cosmetic brand shop. The study produced a theoretical implication on brand experience that it empirically approached to factors of brand experiential provider on holistic brand experience of store. The earlier studies were at best conceptual analysis or they mainly dealt with in-store factor, whereas this paper divides factors that affect the customer's overall experience into 'brand identity', 'marketing mix strategy', and 'physical environment of in-store'