Jaeho Kim

An increasing number of studies have revealed that the progression of colorectal cancer (CRC) is related to gut microbiome composition. Under normal conditions, the gut microbiome acts as a barrier to other pathogens or infections in the intestine and modulates inflammation by affecting the host immune system. These gut microbiota are not only related to the intestinal inflammation associated with tumorigenesis but also modulation of the anti-cancer immune response. Thus, they are associated wit

The Internet-of-Things (IoT) provides a great opportunity to many vertical industries because IoT interconnects various devices such as sensors and actuators and collects/processes data from them in order to improve services and reduce costs. As there exists many IoT technologies in the market, global standards and interworking mechanisms are critical to the success of the IoT. This article introduces standardized interworking interfaces and procedures based on oneM2M global standards, and tests

The Internet of Things (IoT) has been a hot topic for the future of computing and communication. It will not only have a broad impact on our everyday life in the near future, but also create a new ecosystem involving a wide array of players such as device developers, service providers, software developers, network operators, and service users. In this paper, we present an open service framework for the Internet of Things, facilitating entrance into the IoT-related mass market, and establishing a

Recently, various energy harvesting techniques from ambient environments were proposed as alternative methods for powering sensor nodes, which convert the ambient energy from environments into electricity to power sensor nodes. However, those techniques are not applicable to the wireless sensor networks (WSNs) in the environment with no ambient energy source. To overcome this problem, an RF energy transfer method was proposed to power wireless sensor nodes. However, the RF energy transfer method

Like what happened to the Internet of Things (IoT), smart cities have become abundant in our lives as well. One of the smart city definitions commonly used is that smart cities solve city problems to enhance citizens' life quality and make cities sustainable. From the perspective of information and communication technologies (ICT), we think this can be done by collecting and analyzing data to generate insights. The City Data Hub, which is a standard-based city data platform that has been develop

This study describes the purification and characterization of a novel antihypertensive angiotensin I-converting enzyme (ACE) inhibitory peptide from Saccharomyces cerevisiae. Maximal production of the ACE inhibitor from Saccharomyces cerevisiae was obtained from 24 h of cultivation at 30°C and its ACE inhibitory activity was increased by about 1.5 times after treatment of the cell-free extract with pepsin. After the purification of ACE inhibitory peptides with ultrafiltration, Sephadex G-25 colu

우리나라는 높은 고령화 속도에 따른 의료수요의 확대로 건강보험의 재정지출 규모가 급격히 증가하는 추세이다. 기존 연구에서는 재정지출 규모의 증가에 대한 원인으로 민간건강보험가입에 따른 의료수요의 증가를 들고 있다. 본 연구에서는 민간건강보험가입은 소득수준에 따라 가입행태가 이질적으로 나타나는 경향이 있다는 점을 고려하여 기존연구와 달리 소득분위별로 민간건강보험에 가입한 집단과 가입하지 않은 두 집단으로 나누어 의료수요의 차이를 분석하였다. 분석방법으로는 성향점수매칭(PSM)을 이용하여 내생성 문제를 통제하였으며, 조건부평균처치효과(ATT)분석을 이용하여 평균 외래진찰횟수, 입원횟수 그리고 입원일수를 비교하였다. 분석결과 외래진찰횟수, 입원횟수 그리고 입원일수 모두에서 민간건강보험가입자의 의료수요에 대한 도덕적 해이가 명확히 존재하고 있으며, 특히 가장 소득이 높은 4분위에서 도덕적 해이는 2분위나 3분위보다 현저히 높게 나타났다.

Known risk factors for AD were associated with slower cognitive decline in EOAD but rapid cognitive decline in LOAD.

Our results suggest that individuals with a migraine history are more susceptible to AD than those without a migraine history. Additionally, these associations were more significant in younger and obese individuals with migraine than in individuals without migraine.

We present SWAN, a novel All Flash Array (AFA) management scheme. Recent flash SSDs provide high I/O bandwidth (e.g., 3-10GB/s) so the storage bandwidth can easily surpass the network bandwidth by aggregating a few SSDs. However, it is still challenging to unlock the full performance of SSDs. The main source of performance degradation is garbage collection (GC). We find that existing AFA designs are susceptible to GC at SSD-level and AFA software-level. In designing SWAN, we aim to alleviate the

A high-sugar diet induces lifestyle-associated metabolic diseases, such as obesity and diabetes, which may underlie the pro-tumor effects of a high-sugar diet. We supply GL261 syngeneic glioblastoma (GBM) mice with a short-term high-glucose drink (HGD) and find an increased survival rate with no evidence of metabolic disease. Modulation of the gut microbiota through HGD supplementation is critical for enhancing the anti-tumor immune response. Single-cell RNA sequencing shows that gut microbiota

Recently, RF energy transfer has been introduced as an alternative method for powering sensor nodes in wireless sensor networks (WSNs). However, RF energy transfer-based sensor networks have a problem of unfairness among sensor nodes due to the significant difference between their energy harvesting rates according to their positions. To overcome this problem, the energy adaptive MAC protocol, called EA-MAC, has been proposed in our previous work [1], which adaptively manages the duty cycle of se

The Internet of Things allows things in the world to be connected to each other and enables them to automate daily tasks without human intervention, eventually building smart spaces. This article demonstrates a prototype service based on the Internet of Things, TTEO (Things Talk to Each Other). We present the full details on the system architecture and the software platforms for IoT servers and devices, called Mobius and &Cube, respectively, complying with the globally-applicable IoT standar

본 연구에서는 2008년 도입된 기초노령연금이 제도의 목적인 생활이 어려운 노인들의 생활안정과 복지증진을 얼마나 수행하고 있는지 평가하기 위해 기초노령연금 도입으로 소득불평등도와 양극화가 완화되고 있는가를 국민노후보장패널(KReIS)을 이용하여 살펴보았다. 분석결과를 정리하면, 먼저 기초노령연금도입이후 지니계수를 통한 소득불평등도를 분석한 결과 경상소득에서는 불평등도 완화효과가 존재하지만 총소득에서는 완화효과가 존재하지 않았다. 앳킨슨 지수를 통한 불평등도 분석에서도 경상소득이 불평등도를 감소시키는 효과가 존재하지만 총소득에서는 불평등도를 감소시키지 못해 기초노령연금도입에 따른 소득불평등 완화 효과가 존재하지 않았다. 기초노령연금도입이 양극화에 미치는 효과를 분석하기 위해 개선된 ER지수를 분석한 결과 다극화지수의 민감도()를 1.0에서 1.6으로 증가함에 따라 시장소득보다 경상소득에서 양극화가 더 빠르게 진행되어 기초노령연금의 도입에도 불구하고 노인가구의 양극화는 더 빠르게 이루어