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5G 주파수 대역에서의 실내 복도 전파 경로손실 측정 및 분석
김형중,최동유,Kim, Hyeong Jung,Choi, Dong-You 한국정보통신학회 2022 한국정보통신학회논문지 Vol.26 No.5
In this paper, channel propagation path loss was measured in building corridors for frequency bands of 3.7 GHz and 28 GHz, which are used in 5G mobile communication, and compared and analyzed with CI (Close-In) and FI (Floating-Intercept) channel models. To measure the propagation path loss, the measurement was performed while moving the receiver (Rx) from the transmitter (Tx) by 10 m. As a result of the measurement, the PLE (Path Loss Exponent) values of the CI model at 3.7 GHz and 28 GHz were 1.5293 and 1.7795, respectively, and the standard deviations were analyzed as 9.1606 and 8.5803, respectively. In the FI model, 𝛼 values were 79.5269 and 70.2012, 𝛽 values were -0.6082 and 1.2517, respectively, and the standard deviations were 5.8113 and 4.4810, respectively. In the analysis results through the CI model and the FI model, the standard deviation of the FI model is smaller than that of the CI model, so it can be seen that the FI model is similar to the actual measurement result.
김형중(Kim Hyeong Jung) 한국공안행정학회 2010 한국공안행정학회보 Vol.19 No.4
최근 우리사회의 범죄양상은 광역화, 흉포화, 지능화하고 있어 시민의 생활에 심각한 범죄의 두려움을 야기하고 있다. 무엇보다도 현대 정보화 사회의 특징인 익명성과 이질성은 과거 전통사회가 가지고 있는 사적 공간에서의 범죄통제력을 약화시키고 있다. 이러한 전통사회의 범죄통제력이 상실되어 가고 있는 이 시기에 공적 범죄통제기관인 경찰의 역할에 대한 기대는 더욱 높아지고 있다. 이러한 경찰의 역할에 대한 기대는 경찰력의 조직에 대한 개혁을 의미하는 것이다. 2009년 4월부터 본격적으로 시행된 지역경찰의 성과주의는 보다나은 치안서비스를 제공하기 위한 경찰조직의 획기적인 개혁으로 평가할 수 있다. 이러한 지역경찰의 성과주의는 범인검거, 기본근무, 표창과 징계 등에 대한 가ㆍ감점으로 실적을 평가하여 우수지구대, 파출소를 선정하거나 팀별 평가를 하여 특별승진, 승급, 표창 등을 통하여 경찰조직과 경찰관들에게 업무에 대한 보상과 동기부여를 하는 데에 목적을 두고 있다. 하지만 성과주의 시행 이후 1년 6개월이 지난 현재 이에 대해 논란이 가중 되고 있다. 무리한 성과위주의 업무수행이 시민의 인권을 침해한다거나 경찰 조직의 사기 저하 및 세부적인 평가방법에 대한 구체적 문제점들이 제기되고 있다. 따라서 이러한 문제점들을 구조적 측면, 인권적 측면, 사기관리적 측면에서 현황과 원인을 진단하고 그 개선책을 도출하여 몇 가지 정책적 제언을 하고자 하였다. As recent criminal trends in our society grow, not only in geographical impact, but in their ferociousness and intellectual strategy so does it threaten the live of our citizens. Above all, the anonymity and heterogeneity in modern information society weaken the crime control capability in the private sector. The role of the police as the official crime control organization becomes more crucial than in past years. In order to mitigate the loss of police crime control capability in our modern society police organization must reorm their missions. "The Local Police Outcome Evaluation Principle" (LPOEP) implemented in earnest as of April 2009 is hailed as an innovative reform to the police organization to provide better public security services. LPOEP estimates the performances of the local police on the basis of granting the addition of points or the deduction of points for criminal apprehensions and other police activities. Additionally, LPOEP awards special promotion, pay raise and/or citations to the police patrol units, police boxes and patrol teams which provide excellent service. The purpose of this system is to compensate and incentivize the police organizations and individual officers to do better police work. There is however tsome controversy with regar to one and half year old LPOEP namely excessive police activities which are alleged to invade the civil rights of citizens; a morale degeneracy amongst police organizations with regard to the application of LPOEP; and/or specific problems of the evaluation system itself. For these reasons, I composed the aforementioned essay to diagnose the current status of LPOEP, specially a review of its structural side, human right side and morale control side, Additionally I would like to draw improvement measures and suggest a few government policies as it pertains to LPOEP.
김형중(Kim, Hyeong-jung) 한국실내디자인학회 2010 한국실내디자인학회논문집 Vol.19 No.2
Shopping became a meaning of simply buying goods and service as well as buying place and cultural experiences to people living nowaday. Many people make an appointment, watch movies and enjoy shopping in shopping malls. This Change of meaning of shopping made shopping center to be a place for pubic space gradually. Although shopping mall, a type of shopping center, existed from the past, contemporary shopping mall that is enclosed from air started to be established in 1950’s in North America. After that lifestyle and shopping environment having been changed continuously and shopping mall in terms of architectural typology has been changed as well. Now shopping mall provides leisure and entertainment to people and also is playing an important role as redeveloping a city and revitalizing a town. This study will take a look at changes of typology of out-of-town regional shopping mall in north America and analyze reasons and characteristics of changes since 1960"s shopping malls. The purpose of this study is to categorize the type of out-of-town regional shopping mall and to find application method in shopping mall design in Korea.
김형중(Hyeong-Jung Kim),손학식(Hag-Sig Son) 대한전기학회 2010 전기학회논문지 Vol.59 No.9
This paper presents an in-depth review for current status for demand-side management (DSM) investment of energy supplier and an useful prospect on the introduction of Energy Efficiency Resource Standards (EERS). According to the Article 9 of Rational Energy Utilization Act, Energy suppliers-Korea Electric Power Corporation (KEPCO), Korea Gas Corporation (KOGAS) and Korea District Heat Corporation (KDHC) prescribed by Presidential Decree-must establish and implement annual demand-side management investment plan to improve energy efficiency in production, transformation, transportation, storage and usage of corresponding energy and to reduce demand and green house gas emissions. In this paper, we examine the DSM programs of energy suppliers and the results of DSM investment in 2009, then we propose a reasonable solution for the development of DSM investment. Futhermore, in order to compare our situation, the case studies were conducted on EERS issues in England, Italy, France and U.S, such as establishing the energy saving target, selecting the target energy supplier, and penalty and incentive mechanisms. Throughout the case studies, this paper suggests the directions to the DSM investment planning of energy suppliers and the major issues to prepare EERS in Korea.
위암 치료 후 자궁 내에 발생한 단독 전이성 선암 1 예
김형중 ( Kim Hyeong Jung ),오영림 ( O Yeong Lim ),이천준 ( Lee Cheon Jun ),김흥열 ( Kim Heung Yeol ),김원규 ( Kim Won Gyu ),김성한 ( Kim Seong Han ),박은동 ( Park Eun Dong ),전창완 ( Jeon Chang Wan ),윤명희 ( Yun Myeong Hui ),신 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.2
The uteru is an unusual site for metastasis from an extrapelvic neoplasm. Metastasis of gastric cancer to the uterus is rare. We experienced a patient who underwent a gastrectomy and chemotherapy due to gastric cancer and who subsequently suffered a solitary metastatic adenocarcinoma of the uterus from the primary gastric cancer. Similar to Krukenberg tumors of the ovary, lymphatic dissemination is regarded as the route of metastasis from the stomach to the uterine. We report this case with a brief review of literature.