• Title/Summary/Keyword: Alliance performance

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Delay time Analysis of Asynchronous RIT Mode MAC in Wi-SUN (Wi-SUN에서 비동기 RIT모드 MAC의 지연시간 분석)

  • Dongwon Kim;Mi-Hee Yoon
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.24 no.2
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    • pp.65-70
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    • 2024
  • In recent years, research on smart factory wireless mobile communication technology that wirelessly remotely controls utilities is being actively conducted. The Wi-SUN (Wireless Smart Utility Network) Alliance proposed a Wi-SUN protocol structure suitable for building a platform such as a smart factory as a new wireless communication standardization standard based on EEE802.15.4g/e. It analyzes the performance of the IEEE802.15.4e Receiver Initiated Transmission(RIT) Mode Media Access Control (MAC) in terms of throughput and latency, and looks at considerations for efficient operation. RIT mode shows that as the check interval becomes longer, delay time and throughput decrease. It was shown that as the traffic load increases, if the RIT check interval is shortened, the delay time can be shortened and throughput can be increased. RIT mode has the advantage of low power consumption and has neutral characteristics between IEEE802.15.4 and CSL mode in terms of delay time and throughput.

Relationship between Degree of Clinical Satisfaction and Experience on Performance for Dental Hygiene Students (치위생(학)과 학생들의 임상만족도와 수행경험과의 관계)

  • Choi, Ok-Sun;Ahn, Gwang-Sook;Kim, Hye-Jin
    • Journal of dental hygiene science
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    • v.15 no.2
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    • pp.182-189
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    • 2015
  • The purpose of this study was to investigate the relationship between degree of satisfaction and experience on performance in accordance with the characteristics for the dental hygiene students. Dental hygiene students to 480 people from November to December 2014 and analyzed by conducting a survey. The higher grade students were more satisfied with the degree of satisfaction on experience for clinical test performance and clinical practice organization rather than the lower grade students. Also, the degree of satisfaction on major for the higher grade students has been shown as relatively higher than the lower grade students. The factors that affecting the experience for clinical performance and the degree of satisfaction for clinical practice were shown as grade, satisfaction for major and period for practice. In order to enhance the degree of satisfaction on the clinical performance for students, it should be established the system for practice management considering the characteristics of clinical practice by relevant organizations. Also, the dental hygienist who is responsible for dental education should manage his/her practice for students actively. Meanwhile, the practice organization should improve and update the content of education through the consistent alliance with colleges continuously.

Evolution of Exercise Performance and Medical Assessments in U-12 Youth Football Players (U-12 유소년 축구선수의 운동수행력 및 의학적 평가)

  • Seo, Sang-Won;Lee, Ho-Seong
    • 한국체육학회지인문사회과학편
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    • v.56 no.5
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    • pp.665-677
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    • 2017
  • This study aimed to examine the evolution of exercise performance and medical assessments in U-12 youth football players. Participants were recruited from an youth football players (YFG, n=15; $11.2{\pm}0.9yrs$) and normal youth (CON, n=15; $11.5{\pm}0.6yrs$). Both groups were tested for exercise performance (health related physical fitness, skill related physical fitness, functional movement screen; FMS and Y-balance) and medical assessments (lower extremity alignment, range of motion; ROM and manual muscle test; MMT). YFG showed a positive effects on pacer in health related physical fitness, 50-m run and Single-leg standing with eyes closed in skill related physical fitness, active straight leg raise and rotary stability in FMS, non-dominant composite score in Y-balance, respectively compared to CON. However, YFG showed a negative effects on Q-angle of dominant and non-dominant in lower extremity alignment, dorsiflexion of non-dominant, plantarflexion of dominant and non-dominan in ROM, hip extension and abduction, knee flexion and extension of dominant, knee flexion and extension of non-dominant in MMT, respectively compared to CON. These results indicated that U-12 youth football players have shown excellent exercise performance, but medical assessments has proved negative effects.

The Current Statues and Cause of Dietary Supplement Use in Elite Athletes (우수선수들의 운동영양 보조물 이용 현황과 원인)

  • Kim, Jong-Kyu;Lee, Nam-Ju;Lee, Mi-Sook
    • 한국체육학회지인문사회과학편
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    • v.51 no.3
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    • pp.427-435
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    • 2012
  • The purpose of this review study is to examine current status of dietary supplement use to enhance athletic performance capacity in elite athletes based upon anti-doping education, sports type, athletic performance capacity, gender, and age. Several previous review studies have focused on the biochemistry characteristics and intake incidence of dietary supplements and those studies have not showed enough evidence of the reason why elite athletes usually take dietary supplements. Anti-doping education may increase the incidence of dietary supplement use in elite athletes because of increasing expertise of dietary supplements. It would be expected that increased incidence of long-term dietary supplement use may induce positive effects on the body having potential effects on athletic performance capacity, although a trace of nutrients may not directly effect on the outcome of the game. Moreover, it seems that the difference of dietary supplement use based upon gender and age may come from sports type and the difference of dietary supplement intake reason may come from health and body condition maintenance rather than athletic performance capacity when considering dietary supplement use items based upon intake reasons. Most elite athletes consume at least over 2 dietary supplement items in a long period of time rather than 1 dietary supplement item in a short period of time; however, the scientific evidence of dietary supplement use seems to be insufficient. Therefore, further experimental approach studies concerning dietary supplement effects would be needed.

Construction and Validation of a Data Synchronization Server supporting OMA DS Standards (OMA DS 표준을 지원하는 자료동기화 서버 구축 및 적합성 검증)

  • Pak, Ju-Geon;Park, Kee-Hyun
    • Journal of the Korea Society of Computer and Information
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    • v.16 no.5
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    • pp.79-91
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    • 2011
  • In this paper, a DS (Data Synchronization) server for mobile communication environments is constructed and the suitability and the performance of its operations are validated. The DS server provides a way to update the newest data and keep data consistency for clients (mobile devices). In addition, the DS server constructed in this paper supports various synchronization types, and detects all changes and conflicts. In case of data conflicts, the DS server resolves the conflicts according to the several policies implemented in this work. The DS server conforms to the OMA(Open Mobile Alliance) DS standard protocol for interoperability with other mobile devices and servers. In addition to the transmission-by record scheme proposed by the OMA DS standard protocol, the DS server constructed in this paper also provides the transmission-by field scheme for the enhancement transmission performance between the server and clients. In order to validate its operations, data synchronization between the DS server and the SCTS (SyncML Conformance Test Suit), the suitability validation tool provided by the OMA, is performed. The validation results show that the DS server constructed in this paper satisfies all of the test cases except the Large Object function. The Large Object function will be implemented later because the function is not needed for the personal information synchronization process which this paper aims for. Also, synchronization times of the DS server are measured while increasing the number of data and clients. The results of the performance evaluations demonstrate that the DS server is scalable, in the sense that it has not suffered from any serious bottlenecks with respect to the number of data and clients. We expect that this work will provide a framework for various studies in the future for improving mobile DS operations.

Hot-melt extruded copper sulfate affects the growth performance, meat quality, and copper bioavailability of broiler chickens

  • Kim, Min Ju;Hosseindoust, Abdolreza;Lee, Jun Hyung;Kim, Kwang Yeoul;Kim, Tae Gyun;Chae, Byung Jo
    • Animal Bioscience
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    • v.35 no.3
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    • pp.484-493
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    • 2022
  • Objective: This study was conducted to evaluate the effects of the supplementation of diets of broiler chickens with hot-melt extruded CuSO4 (HME-Cu) on their growth performance, nutrient digestibility, gut microbiota, small intestinal morphology, meat quality, and copper (Cu) bioavailability. Methods: A total of 225 broilers (Ross 308), one-day old and initial weight 39.14 g, were weighed and distributed between 15 cages (15 birds per cage) in a completely randomized experimental design with 3 treatments (diets) and 5 replicates per treatment. Cages were allotted to three treatments including control (without supplemental Cu), IN-Cu (16 mg/kg of CuSO4), and HME-Cu (16 mg/kg of HME processed CuSO4). Results: The HME-Cu treatment tended to increase the overall body weight gain (p<0.10). The apparent digestibility of Cu was increased by supplementation of HME-Cu at phase 2 (p<0.05). The Escherichia coli count in cecum tended to decrease with the supplementation with Cu (p<0.10). In addition, the HME-Cu treatment had a higher pH of breast meat than the control and IN-Cu treatments (p<0.05). Significant increases in the cooking loss, water-holding capacity, and lightness in the breast were observed in the HME-Cu treatment compared to the control (p<0.05). The Cu content of excreta increased with the Cu supplementation (p<0.05). The concentration of excreta Cu in broilers was decreased in the HME-Cu compared to the IN-Cu in phase 2 (p<0.05). The Cu concentration in the liver was increased with the HME-Cu supplementation, compared with the control diets (p<0.05). Conclusion: This study showed that HME-Cu supplementation at the requirement level (16 mg/kg diets) in broiler diets did not affect the growth performance and the physiological function of Cu in broilers. However, supplementation of Cu in HME form improved the meat quality and the bioavailability of Cu.

The Power of Connectivity: Cooperative Network and Firm Performance in the IT Industry (초연결시대의 협력: IT 기업 간 협력 네트워크와 성과에 관한 연구)

  • Ji Hye Park
    • Information Systems Review
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    • v.19 no.2
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    • pp.21-35
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    • 2017
  • The advancement of IT and the "Fourth Industrial Revolution" blurred the boundary between industries. The importance of strategic cooperation between enterprises is emphasized. IT companies must consider their existing business areas and create new territories to drive changes in the industry. They must also secure their competitive edge and manage economic costs to enable them to compete with their global counterparts. By utilizing their resources effectively, these firms can create value through inter-firm cooperation. This study analyzes the collaborative network of global IT companies using social network analysis and examines the effect of this network on firm performance. Collaborative linkages and betweenness centrality, which represent the bridging position of a firm in a network, significantly affect firm performance. This result highlights the importance of the structural position of a firm in a cooperative network of IT companies. This study also characterizes clusters in a network of IT companies. Most of these clusters comprise a combination of IT companies in diverse IT industries. These clusters suggest that these companies engage in multilateral cooperation without boundaries to maximize their business capabilities. This study offers practical implications for establishing a cooperative strategy and framework that can capture business trends in the IT industry from a macroscopic view. This study also visualizes collaborative networks in a multifaceted way using social network analysis to provide researchers and business practitioners with an informative viewpoint.

A Design of Framework based on SyncML for Synchronizing GIS Data (GIS 데이터의 동기화를 위한 SyncML 기반 프레임워크 설계)

  • Lee, Hyoun-Sup;Kim, Jin-Deog
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2008.05a
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    • pp.187-190
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    • 2008
  • Owing to rapid advancements of the mobile computing technologies and the performance of mobile device recently, the data synchronization techniques between severs and mobile clients are getting more and more important. OMA also proposes and recommends standard synchronization methods to use SyncML. However, the feasible data in the method are limited to normal document data, scheduler data, etc. This paper a standard framework based on SyncML. We call it SCGFG. The SCGFG is able to synchronize not only the above data but also GIS data which is very useful in mobile applications. It applies GML, international GIS standard, to the synchronization. By means of using XML, it is also able to resolve the serious problem that is the increase of data volume occurred by SyncML and GML. efficiently. It is highly expected to be useful in the smart synchronization of GIS data among several servers and mobile clients.

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Characteristics and Technology Development Mode of Local Hidden Champions in Korea : How are they different? (지역 강소기업의 특성과 기술개발 방법 : 독일 강소기업과의 비교를 중심으로)

  • Huh, Moon-Goo
    • Journal of Digital Convergence
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    • v.13 no.8
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    • pp.221-234
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    • 2015
  • The purpose of this paper is to investigate the differences between successful SMEs in Korea and German hidden champions, with respect to both strategic importance and performance of major competitive dimensions, and mode of technology development. Data were collected through survey and public databases, and the sample comprises successful SMEs located in regional area in Korea. The results show that Korean hidden champions are relatively low regarding specialization of business domain and globalization while German hidden champions have positioned in global niche market. It is also found that local firms utilize technology alliances actively for technology development while German hidden champions rely heavily on internal R&D as a primary source of innovation. Based upon these results, policy directions for fostering local hidden champions were suggested.

Tactics Generation about Anti-submarine using Genetic Algorithm through Oceanography Environmental Change (해양 환경 변화에 따른 유전 알고리즘 기반의 대잠전 전술 생성에 관한 연구)

  • Park, Kang-moon;Shin, Sang-bok;Kim, Seon-jae;Hwang, Jaeryong
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.22 no.2
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    • pp.362-368
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    • 2018
  • Making proper judgements in urgent situations facing a submarine at the sea is very critical. This is because the commander's misjudgments could drive the entire ally to destruction in a moment. In order to generate appropriate tactics on behalf of the human commander and to analyze the effectiveness in such emergency situations, studies using intelligent agents and genetic algorithms have been conducted. In this study, inference engine based intelligent agent is adopted to each warship and submarine to generate optimal tactics on the variable environment with genetic algorithms. And we analyze the risk of the alliance according to the performance of the enemy submarine through a simple simulation and generate appropriate tactics using the genetic algorithm. Also generated tactics are evaluated and the results are analyzed to figure out why such results are formed.