• International Journal of Contents
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• 제8권2호
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• pp.89-96
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• 2012

Scientific analysis of crime hot spots is essential in preventing and/or suppressing crime. However, results could be different depending on the analytic methods, which highlights the importance of choosing adequate tools. The purpose of this study was to introduce two advanced techniques for detecting crime hot spots, GAM and Local Moran's I, hoping for more police agencies to adopt better techniques.GAM controls for the number of population in study regions, but local Moran's I does not. That is, GAM detects high crime rate areas, whereas local Moran's I identifies high crime volume areas. For GAM, physical disorder was used as a proxy measure for population at risk based on the logic of the broken windows theory. Different regions were identified as hot spots. Although GAM is generally regarded as a more advanced method in that it controls for population, it's usage is limited to only point data. Local Moran's I is adequate for zonal data, but suffers from the unavoidable MAUP(Modifiable Areal Unit Problem).

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 추계학술대회
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• pp.210-215
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• 2003

A fine hot-wire is used both as a heating element and a temperature sensor in transient hot-wire method. The traditional sensor system is unnecessarily big so that it takes large fluid volume to measure the thermal conductivity. To dramatically reduce this fluid volume, a new sensor fabrication and a data processing method are proposed in this article. Contrast to the conventional and most popular two wire sensor, the new sensor system is made up of divided multiple long and short wires. Through validation experiments, it is found that the measured thermal conductivities of the glycerin are exactly same each other between the conventional and proposed new method. Also some technical considerations in arranging the multiple wires are briefly discussed.

• Journal of Communications and Networks
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• 제6권3호
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• pp.216-225
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• 2004

In a cellular network, if there are too many data users in a cell, data may suffer long delay, and system's quality-of-service (QoS) will degrade. Some traditional schemes such as dynamic channel-allocation scheme (DCA) will assign more channels to hot (or overloaded) cells through a central control system (CC) and the throughput increase will be upper bounded by the number of new channels assigned to the cell. In mobile-assisted data forwarding (MADF), we add an ad-hoc overlay to the fixed cellular infrastructure and special channels-called forwarding channels- are used to connect mobile units in a hot cell and its surrounding cold cells without going through the hot cell's base station. Thus, mobile units in a hot cell can forward data to other cold cells to achieve load balancing. Most of the forwarding-channel management work in MADF is done by mobile units themselves in order to relieve the load from the CC. The traffic increase in a certain cell will not be upper bounded by the number of forwarding channels. It can be more if the users in hot cell are significantly far away from one another and these users can use the same forwarding channels to forward data to different cold neighboring cells without interference. We find that, in a system using MADF, under a certain delay requirement, the throughput in a certain cell or for the whole net-work can be greatly improved.

• 한국정보통신학회논문지
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• 제13권2호
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• pp.315-320
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• 2009

플래시 메모리는 데이터 변경 시에 덮어쓰기가 되지 않아 해당 데이터를 새로운 영역에 쓰기 이전에 존재하던 데이터는 무효화시켜야 하고 가비지 컬렉션 시 소거해야 한다. 플래시 메모리의 빠른 발전속도에 힘입어 플래시메모리의 용량은 급속도로 증가하고 있다. 플래시 메모리의 용량이 대용량화됨에 따라 소거대상 블록을 선택할 때 전체 플래시 메모리를 대 상으로 탐색을 실시하면 CPU의 수행시간이 많이 증가하는 문제점이 있다. 이 단점을 개선하기 위해 플래시 메모리를 그룹으로 분할하여 관리하고 소거대상 블록을 선택할 때 해당 그룹을 대상으로 탐색을 수행한다. 접근 지역성을 가지는 작업부하에 대해 hot 데이터는 hot 그룹에 배치하고, cold 데이터는 cold 그룹에 배치하여 그룹 내에서의 wear-leveling을 개선하고, 주기적으로 hot 그룹의 역할과 cold 그룹의 역할을 교환하여 전체플래시 메모리의 wear-leveling과 성능을 개선하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 추계 학술논문 발표대회
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• pp.53-56
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• 2008

This paper is to investigate the change of the period of hot weather concrete with elapse of age based on climate data. Climate data for 30 years and 5 years are used respectively. Determination of the period of hot weather concreting on architectural execution in Korea according to the specifications of AIJ, KSCE, and ACI are discussed. According to the research, the period of hot weather concreting with each specification in most regions lasts over 35 days. Compared with the period of cold weather concreting in hillside and inland area, coastal areas have shorter period in the same latitude. The period of hot weather concreting tends to decrease with high latitude. As expected, with the elapse of age, the period of hot weather concrete exhibited to decrease, especially, big city like Seoul, Busan etc had remarkably increased period by as much as a week. This is due to the global warming and industrialization effect with the elapse of age.

• 대한건축학회논문집:구조계
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• 제34권5호
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• pp.51-58
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• 2018

The purpose of this study was to analyze the effect of seasonal change in characteristics of hygiene activity on domestic hot water energy consumption. With 16 residents of 4 households, the data about frequency of hygiene activity and water temperature was collected from February to August, 2017. The results of collected data discovered that the frequency of hygiene activity was higher especially in summer, whereas the consumption of warm water they used was higher in winter. The seasonal change in characteristics of hygiene activity was analyzed to be changed and strongly influenced by outdoor temperature. The influence of characteristics of hygiene activity on hot water consumption was analyzed. There was 13% of difference between consumption that was calculated taking characteristics of hygiene activity into account and consumption that was not. Therefore, this study suggested hygiene activity schedule, hot water profile and hot water consumption pattern, which can be utilized for improving simulation as well.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권6호
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• pp.1800-1817
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• 2022

With the development of the economy and the improvement of living standards, the hot issues in the subject area have become the main research direction, and the mining of the hot issues in the subject currently has problems such as a large amount of data and a complex algorithm structure. Therefore, in response to this problem, this study proposes a method for extracting hot keywords in scientific journals based on the improved BERT model.It can also provide reference for researchers,and the research method improves the overall similarity measure of the ensemble,introducing compound keyword word density, combining word segmentation, word sense set distance, and density clustering to construct an improved BERT framework, establish a composite keyword heat analysis model based on I-BERT framework.Taking the 14420 articles published in 21 kinds of social science management periodicals collected by CNKI(China National Knowledge Infrastructure) in 2017-2019 as the experimental data, the superiority of the proposed method is verified by the data of word spacing, class spacing, extraction accuracy and recall of hot keywords. In the experimental process of this research, it can be found that the method proposed in this paper has a higher accuracy than other methods in extracting hot keywords, which can ensure the timeliness and accuracy of scientific journals in capturing hot topics in the discipline, and finally pass Use information technology to master popular key words.

• Journal of the Korean Data and Information Science Society
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• 제8권1호
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• pp.31-39
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• 1997

we shall propose some Bayes estimators and some generalized maximum likelihood estimators for reliability of a two-unit hot standby system with perfect switch based upon a complete sample of failure times observed from the exponential model and compare the peformances of the proposed estimators in terms of mean squared error.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2007년도 추계종합학술대회
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• pp.574-577
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• 2007

디스크에서는 데이터가 변경되면 해당 영역에 겹쳐 쓰기를 수행하나 플래시 메모리에서는 겹쳐 쓰기가 수행되지 않아 데이터가 변경될 때 새로운 영역에 데이터를 갱신한다. 따라서 이전의 데이터는 쓸모없는 데이터가 되기 때문에 가비지 컬렉션을 통해 지움 연산을 수행하여 새로운 영역을 확보하게 된다. 지움(erase) 연산을 수행할 수 있는 회수가 플래시 메모리의 특성에 의해 일정 회수로 제한을 받게 되므로 플래시 메모리의 모든 블록은 고르게 쓰여 지고 지워져야 한다. 본 논문은 지역성을 가지는 접근에서 wear-leveling을 개선하기 위한 방법으로 hot 데이터와 cold 데이터를 서로 다른 뱅크에 저장하고 시간이 흐름에 따라 일정주기로 cold 뱅크와 hot 뱅크를 교환하는 CB-MB(Cost Benefit between Multi Bank) 방법을 제안하고 성능을 평가하였다. CB-MB는 uniform한 작업부하에 대해서는 다른 방법들과 유사한 성능을 보이는 반면 접근 지역성을 가지는 작업부하에 대해서는 상대적으로 월등한 성능을 제공하는 것으로 분석되었다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 춘계학술대회
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• pp.669-670
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• 2016

본 연구에서는 운동부 지도자들이 학생 선수들의 결과 데이터를 핫 존(Hot Zone)과 콜드 존(Cold Zone)으로 구분하여 지도에 참고할 수 있는 어플리케이션을 개발하였다. 본 연구에서 개발된 종목은 농구이다. 운동부 지도자들은 학생 선수들의 득점 확률이 높은 곳을 분석할 수 있고, 이를 이용하여 훈련 성과를 더욱 높일 수 있다. 그리고 학생 선수들도 축적된 데이터를 통하여 자신의 장단점을 파악하여 동기 부여와 경기력 향상을 기대할 수 있으며, 이에 따른 후속 연구를 할 수 있을 것으로 기대한다.