• Journal of Technology Innovation
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• v.6 no.2
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• pp.101-121
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• 1998

Recent entrepreneurship studies emphasize the importance of entrepreneurial activities of entrepreneurs. This study focuses entrepreneurial behaviors, especially entrepreneurial networking activities of Korean high-tech ventures. Networking activities can utilize external resources which are critical to success, with less resource commitment. This study examines the relationship between characteristics of entrepreneurial networking and performance, and analyses influencing factors of entrepreneurial networking activities. Based on the data from 55 new high-tech ventures in Korea, hypotheses that the characteristics of entrepreneurial networking are related to the performance of new high-tech ventures are tested using regression analysis and t-test. Major findings of this study are as follows: (1) entrepreneurial networking are related to the performance of new high-tech ventures, (2) significant differences are found in the characteristics of entrepreneurial networking between high- and low-performance firms, (3) characteristics of entrepreneurs and firm' technological capabilities are related to the degree of entrepreneurial networking activities. Finally, managerial and policy implications of the study are presented and future research directions are also suggested.

• Proceedings of the Technology Innovation Conference
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• 1998.06a
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• pp.23-37
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• 1998

Recent entrepreneurship researches emphasize the importance of entrepreneurial behaviors, entrepreurs activities. This study focused entrepreneurial behaviors, especially entrepreneurial networking for using external resources which are critical to success. This study examines the relationship between characteristics of entrepreneurial networking and performance using data from 55 new high-tech ventures in Korea. We tested hypotheses that the characteristics of entrepreneurial networking are related to the performance of new high-tech ventures using regression analysis and t-test. Major findings of this study are as follows: (1) entrepreneurial networking are related to the performance of new high-tech ventures, (2) significant differences are found in the characteristics of entrepreneurial networking between high and low-performance firms, (3) some factors are related to the entrepreneurial networking. Finally, some managerial and policy implications are presented and future research directions are suggested.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.10b
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• pp.1375-1378
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• 2001

네트워크에 흐르는 트래픽 측정을 효율적으로 함으로서 트래픽의 종류와 양을 알 수 있고, 이를 기반으로 측정 네트워크의 트래픽 특성과 상태를 파악할 수 있다. 본 고에서는 초고속 연구망 환경에 적합한 네트워크 분석 인프라(NAI) 구축을 제시한다. NAI 구성은 네트워크 링크를 모니터링하는 수동적 측정 방법 MRTG 와 NAVI, 그리고 인위적으로 트래픽을 발생시켜 그 결과를 분석하는 능동적 측정 방법 PingER 와 AMP 두 가지 종류로 나뉜다. 현재 초고속 연구망에서 적용중인 네트워크 트래픽 분석 측정 도구 하나씩 알아보고, 국내 외로 링크된 네트워크 트래픽의 특성과 상태를 균형적으로 분석 할 도구에 대한 모델을 알아본다.

• Journal of Information Processing Systems
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• v.1 no.1 s.1
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• pp.49-54
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• 2005

With the recent advances in Micro Electro Mechanical System (MEMS) technology, low cost and low power consumption wireless micro sensor nodes have become available. However, energy-efficient routing is one of the most important key technologies in wireless sensor networks as sensor nodes are highly energy-constrained. Therefore, many researchers have proposed routing protocols for sensor networks, especially cluster-based routing protocols, which have many advantages such as reduced control messages, bandwidth re-usability, and improved power control. Some protocols use information on the locations of sensor nodes to construct clusters efficiently. However, it is rare that all sensor nodes know their positions. In this article, we propose another cluster-based routing protocol for sensor networks. This protocol does not use information concerning the locations of sensor nodes, but uses the remaining energy of sensor networks and the desirable number of cluster heads according to the circumstances of the sensor networks. From performance simulation, we found that the proposed protocol shows better performance than the low-energy adaptive clustering hierarchy (LEACH).

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.87-87
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• 2004

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.388-388
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• 2004

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2005.11a
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• pp.211-214
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• 2005

There are emerging many eScience applications. More and more scientists want to collaborate on their investigation with international partners without space limitation by using these applications. Since these applications have to analyze the massive raw data, scientists need to send and receive the data in short time. So today's network related requirement is high speed networking. The key point of network performance is transport protocol. We can use TCP and UDP as transport protocol but we use TCP due to the data reliability. However, TCP was designed under low bandwidth network, therefore, general TCP, for example Reno, cannot utilize the whole bandwidth of high capacity network. There are several TCP variants to solve TCP problems related to high speed networking. They can be classified into two groups: loss based TCP and delay based TCP. In this paper, I will compare two approaches of TCP variants and propose a hybrid approach for high speed networking.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2005.11a
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• pp.207-210
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• 2005

Ubiquitous computing is one of the key technology areas in the "Project on Development of Ubiquitous computing and network technology" promoted by the Ministry of Science and Technology as a frontier business of the $21^{st}$ century in Korea, which is based on the new concept merging physical space and computer-based cyber space. With recent advances in Micro Electro Mechanical System (MEMS) technology, low cost and low-power consumption wireless micro sensor nodes have been available. Using these smart sensor nodes, there are many activities to monitor real world, for example, habitat monitoring, earthquake monitoring and so on. In this paper, we introduce web-based real environment monitoring system incorporating wireless sensor nodes. It collects sensing data produced by some wireless sensor nodes and stores them into a database system to analyze. Our environment monitoring system is composed of a networked camera and environmental sensor nodes, which are called Mica2 and developed by University of California at Berkeley. We have modified and ported network protocols over TinyOS and developed a monitoring application program using the MTS310 and MTS420 sensors that are able to observe temperature, relative humidity, light and accelerator. The sensed data can be accessed user-friendly because our environment monitoring system supports web-based user interface. Moreover, in this system, we can setup threshold values so the system supports a function to inform some anomalous events to administrators. Especially, the system shows two useful pre-processed data as a kind of practical uses: a discomfort index and a septicity index. To make both index values, the system restores related data from the database system and calculates them according to each equation relatively. We can do enormous works using wireless sensor technologies, but just environment monitoring. In this paper, we show just one of the plentiful applications using sensor technologies.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.11 no.3
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• pp.177-187
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• 2016

The purpose of this study is to look into the influence of salesperson's human networking and knowledge on its job in an insurance company in its performances and to suggest how to effectively manage and develop salespersons. For this study, 305 salespersons participated in a questionnaire survey and we used T-TEST to analyze the data. The results are as follows. Its performance is positively influenced by salesperson's networking and knowledge on its job. In term of moderating effect on the attitude for its job, making efforts to organize networking was rejected, however the attitude for retaining their networking positively affected to the performance. As a result, the higher the level of salesperson's knowledge and networking is the higher its performance. To increase competitiveness, an insurance company has a strategy for the support to organize networking and the training of salespersons to become high performers.

• Journal of Internet Technology
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• v.21 no.3
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• pp.849-859
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• 2020

High-performance computing (HPC) systems provide huge computational resources and large memories. The hybrid memory is a promising memory technology that contains different types of memory devices, which have different characteristics regarding access time, retention time, and capacity. However, the increasing performance and employing hybrid memories induce more complexity as well. In this paper, we propose a roofline-based data migration methodology called HyDM to effectively use hybrid memories targeting at Intel Knight Landing (KNL) processor. HyDM monitors status of applications running on a system and migrates pages of selected applications to the High Bandwidth Memory (HBM). To select appropriate applications on system runtime, we adopt the roofline performance model, a visually intuitive method. HyDM also employs a feedback mechanism to change the target application dynamically. Experimental results show that our HyDM improves over the baseline execution the execution time by up to 44%.