• 복식
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• 제46권
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• pp.159-170
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• 1999

This study was for reasonable gathering by a fabric and a skirt length. So the purpose of this study was to show the basic data to forecast the gathering effect of gathered skirt which was more aesthetical and suitable for a use in time of making pattern. To find the reasonable gathering amount by a length of gathered skirt and a fabric the methods of this study were divided on three types-five kinds of the gathering amounts three kinds of fabrics and three kinds of skirt ength-so forty five kinds of the samples were made. As the visual evaluation of the gathered skirt were practiced bgy these factors. The following are the results of this research. 1. For this research of fabrics the gathering amounts which were shown visually the most aesthetical silhouette in the same material and skirt length were decided on 1.5 times or 2.0 times. On the other side 0.5 times and 2.5 times of gathering amount were got a low estimation visually 2. Except in case the skirt length was 40cm and gathering amount were 1.0 times and 1.5 times in the same gathering amount and length of skirt it was estimated that wool fabric was most aesthetical silhouette fabric. On the other hand it was got low estimation which the cotton was not good for draping effect because it was got the lowest estimation level in all cases. 3. Considered as a whole in the same gathering amount and fabric the fabric widths for gathering which were shown the most aesthetical silhouette were estimated the length of 60cm in cotton fabric 80cm in polyester fabric and 40cm in wool fabric. Therefore as a fabric was weighty a length of a skirt was shorten so, it was estimated visually more beautiful.

• 영어어문교육
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• 제13권3호
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• pp.77-97
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• 2007

To compare data on the speech act of requests from two different methods, a study was conducted in which both native and non-native speakers of English participated as subjects, and data were collected by means of actual e-mail writing and DCT (discourse completion test). The analysis of requests from the two different data-gathering methods showed that despite some similarities, considerable differences existed between e-mail and DCT requests in several important aspects of requests such as amount of talk, directness level, downgraders and supportive moves which play an important role in making a given request sound less imposing and more polite. Also it was shown that requests of non-native speakers differed considerably from requests of native speakers in terms of the four aspects of requests across type of data-gathering methods. Based on the findings, some suggestions were made for both further research and L2 classrooms.

• 제어로봇시스템학회논문지
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• 제4권4호
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• pp.551-560
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• 1998

This paper presents a neural network model representing complex hydro-thermo-dynamic characteristics of a steam generator in nuclear power plants. The key modeling processes include training data gathering process, analysis of system dynamics and determining of the neural network structure, training process, and the final process for validation of the trained model. In this paper, we suggest a training data gathering method from an unstable steam generator so that the data sufficiently represent the dynamic characteristics of the plant over a wide operating range. In addition, we define the inputs and outputs of neural network model by analyzing the system dimension, relative degree, and inputs/outputs of the plant. Several types of neural networks are applied to the modeling and training process. The trained networks are verified by using a class of test data, and their performances are discussed.

• 한국의류학회지
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• 제28권6호
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• pp.776-783
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• 2004

The purpose of this study was to identify the reasonable gathering conditions as consider of effect of gathering and variation of silhouette made by gathering conditions. The experimental design consists of four factorial design: (1) three kinds of different weight and different thickness fabrics (2) three kinds of different stitch densities (3) five kinds of different ratio of gathers (4) three kinds of different angles. Therefore one hundred thirty five (135) samples were made. Data analysis utilize SPSS WIN 10.0 Package. The results of this study were as follows: 1. In the aspect of fabrics, it is shown the visual propriety that it is as thin as the small stitch, and as thick as the big stitch. 2. As stitch densities, it shows the different stabilized nodes. 3. In the aspect of ratio of gathers, it is shown the visual propriety that a few was small stitches, which help formations of nodes, and a lot were big stitches, which help increased the effect of gather. 4. In the aspect of angle of bias, the drape appearance was excellent as a sample of cutting by 0 angle(0$^{\circ}$) of bias. The big stitches that help formations of stabilized nodes, and a case of cutting by 45 angle(45$^{\circ}$) of bias was small stitch.

• 대한임베디드공학회논문지
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• 제16권3호
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• pp.113-117
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• 2021

The data gathering delay and the network lifetime are important indicators to measure the service quality of wireless sensor and actuator networks (WSANs). This study proposes a dynamically cluster head (CH) selection strategy and automatic scheduling scheme of collectors for prolonging the network lifetime and shorting data gathering delay in WSAN. First the monitoring region is equally divided into several subregions and each subregion dynamically selects a sensor node as CH. These can balance the energy consumption of sensor node thereby prolonging the network lifetime. Then a task allocation method based on genetic algorithm is proposed to uniformly assign tasks to actuators. Finally the trajectory of each actuator is optimized by ant colony optimization algorithm. Simulations are conducted to evaluate the effectiveness of the proposed method and the results show that the method performs better to extend network lifetime while also reducing data delay.

• 한국정보통신학회논문지
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• 제14권6호
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• pp.1323-1330
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• 2010

음향데이터 수집체계가 다양화되고 고성능화 됨에 따라 수집되는 음향데이터의 양은 기하급수적으로 증가되었다. 이렇게 수집된 음향데이터는 정밀한 분석을 위하여 분석환경으로의 전송이 필요하다. 이러한 수집/분석 체계에서는 빠르고 안정적인 전송은 물론 고도의 완벽한 보안이 요구된다. 하지만 기존시스템은 체송방식을 사용하기 때문에 자료전달에 많은 시간이 필요하다. 아울러 네트워크를 사용하는 경우에 비보호 저속망은 전송 안정성과 자료 보호성이 취약하여 구현이 불가능하다. 이에 본 논문에서는 일반적으로 사용되는 비보호 저속망 환경에서 고용량의 수집 음향데이터를 전송하고 보호하는 시스템을 제시한다. 구현된 시스템은 비보호 저속망 환경에서도 안전하게 음향데이터를 전송하고 다양한 위협 요소로부터 안전하게 음향데이터를 보호한다.

• 한국산학기술학회논문지
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• 제12권10호
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• pp.4632-4641
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• 2011

이 논문에서는 농축산물 이력추적관리제의 성공적 도입 및 확대에 있어 중요한 기반요소인 생산이력정보를 효율적으로 수집할 수 있는 수기정보 전자화 기술 기반의 농축산물 생산이력정보 수집 시스템을 제안한다. 제안 시스템은 디지털펜으로 종이문서 형태의 관리대장 작성만으로 기록 대장과 동일한 디지털이미지를 생성하고, 필기체인식을 통해 기록 내용을 데이터베스화한다. 제안 시스템은 PC, PDA, 터치스크린 등의 정보 수집기기에 비해 이동성, 사용 편이성, 데이터 입력 속도 측면에서 뛰어나고, 열악한 농축산 작업 환경에서 사용하기 적합하기 때문에 전산능력과 시간적 여유가 없는 농가에서 효율적으로 양질의 생산이력정보를 수집할 수 있다. 수기정보 전자화 기술은 가공, 유통, 판매 단계의 종이문서 기반 정보취득 업무에 적용될 수 있으며, RFID/USN 기반 시스템과 연동하여 고도화된 이력추적관리 시스템 구축에 사용될 수 있다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권9호
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• pp.4706-4726
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• 2019

The paper is devoted to the detailed description of the distributed system for gathering data from Windows-based workstations and servers. The research presented in the beginning demonstrates that neither a solution for gathering data on attacks against Windows based PCs is available at present nor other security tools and supplementary programs can be combined in order to achieve the required attack data gathering from Windows computers. The design of the newly proposed system named Colander is presented, too. It is based on a client-server architecture while taking much inspiration from previous attempts for designing systems with similar purpose, as well as from IDS systems like Snort. Colander emphasizes its ease of use and minimum demand for system resources. Although the resource usage is usually low, it still requires further optimization, as is noted in the performance testing. Colander's ability to detect threats has been tested by real malware, and it has undergone a pilot field application. Future prospects and development are also proposed.

• 한국인터넷방송통신학회논문지
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• 제16권4호
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• pp.89-96
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• 2016

본 논문에서는 데이터수집을 위한 MDC(mobile data collector) 기반의 무선센서네트워크를 고려한다. 이러한 네트워크에서는 MDC들이 이동하며 주위환경으로부터 데이터를 수집한 후 싱크노드에게 전달한다. 단일 MDC를 사용하는 기존 방식에서는 높은 데이터 수집 지연 문제가 발생한다. 복수의 MDC를 사용하는 일부 기존 방안에서는 네트워크 수명최대화에 초점을 두고 데이터 전달 지연에 대한 고려는 하지 않았다. 기존 방안의 이러한 제약을 극복하기 위하여 본 논문에서는 MDC의 개수가 주어진 상황에서 패킷지연을 최소화하는 문제와, 최대 허용 패킷 지연이 주어진 상황에서 필요한 MDC의 수를 최소화 하는 문제를 고려한다. 이를 위해서 두 개의 최적화 문제가 구성되었으며 MDC들의 이동거리와 이동시간 추정 모델을 개발하였다. Interior-point 알고리즘을 이용하여 최적화 문제에 대한 해를 구했으며, 제안된 방안을 검증하기 위한 수치결과와 분석을 제시하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권4호
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• pp.1618-1637
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• 2018

By means of compressive sensing (CS) technique, this paper considers the collection of sensor data with spatiotemporal correlations in wireless sensor networks (WSNs). In energy-constrained WSNs, one-dimensional CS methods need a lot of data transmissions since they are less applicable in fully exploiting the spatiotemporal correlations, while the Kronecker CS (KCS) methods suffer performance degradations when the signal dimension increases. In this paper, an appropriate sensing matrix as well as an efficient sensing method is proposed to further reduce the data transmissions without the loss of the recovery performance. Different matrices for the temporal signal of each sensor node are separately designed. The corresponding energy-efficient data gathering method is presented, which only transmitting a subset of sensor readings to recover data of the entire WSN. Theoretical analysis indicates that the sensing structure could have the relatively small mutual coherence according to the selection of matrix. Compared with the existing spatiotemporal CS (CS-ST) method, the simulation results show that the proposed efficient measurement method could reduce data transmissions by about 25% with the similar recovery performance. In addition, compared with the conventional KCS method, for 95% successful recovery, the proposed sensing structure could improve the recovery performance by about 20%.