Na Ra Kim

In this paper, we present an experimentally validated end-to-end channel model for molecular communication systems with metal-oxide sensors. In particular, we focus on the recently developed tabletop molecular communication platform. Unlike previous work, this paper separates the system into two parts-the propagation and the sensing. Based on this separation, a more realistic channel model is derived. The coefficients in the derived models are estimated using a large collection of experimental d

A post-treatment process for metallic nanoparticle-based films using a movable halogen lamp is proposed to improve the microstructural density and the electrical conductivity. An annealing system that conceptually simplifies roll-to-roll processing was constructed, and the halogen lamp used as a heating source was designed to move instead of the substrate. When the liquid inkjet-printed film was annealed at a high heating rate, high density and near-bulk resistivity (2.64 μΩ cm) were obtained. T

BACKGROUND: Medical spending rises sharply with age. Even with universal health insurance, older adults may be at risk of catastrophic out-of-pocket medical spending. We aimed to compare catastrophic out-of-pocket medical spending among adults ages 65 and older in the United States, where seniors have near-universal coverage through Medicare, versus South Korea, where all residents have national health insurance. METHODS: We used the 2016 Health and Retirement Study and the Korean Longitudinal S

The goals of the present study were to test whether (and which) basic numerical abilities can be improved with training and whether training effects transfer to improvement in children's math achievement. The literature is mixed with evidence that does or does not substantiate the efficacy of training basic numerical ability. In the present study, we developed a child-friendly software named "123 Bakery" which includes four training modules; non-symbolic numerosity comparison, non-symbolic numer

Mycobacterium bovis strain 1595 was isolated from the lymph node of South Korean native cattle. The complete genome sequence of strain 1595 was determined in 2 contigs and was found to be 4,351,712 bp in size, with a 65.64% G+C content and 4,358 predicted protein-coding genes.

This paper proposes an antenna selective timing synchronization method for multiple-input multiple-output orthogonal frequency division multiplexing-based IEEE 802.11ac wireless local area network systems. IEEE 802.11ac systems support up to eight antenna elements for adopting an MIMO technique. The increase in the number of antennas results in high power consumption due to the very high computational complexity involved. In addition, cyclic delay diversity applied for each antenna causes timing

H. pylori 감염 후 손상된 위점막에 대한 프로폴리스 복합물의 치료 효과를 조사하기 위하여 병리조직학적 소견, H. pylori colonization, pro-inflammatory cytokines 생성 관련 유전자 발현 분석 및 산화스트레스 분석을 실시하여 종합적으로 비교 검토하였다. 프로폴리스를 단독으로 적용하였을 경우 전반적으로 항 파이로리 부착 억제, 항산화 및 항염증효과를 보이는 것으로 확인되었다. 프로폴리스, 올리브 잎 추출물 또는 감초 추출물을 각각 단독으로 사용하였을 때보다 프로폴리스와 올리브 잎 추출물, 감초 추출물을 모두 혼합 적용하였을 때 항 파이로리 부착 억제, 항산화 및 항염증 효과가 더 증가하여 모든 검사 항목에서 가장 우수한 효과를 나타내었다. 하지만 프로폴리스, 올리브 잎 추출물 및 감초 추출물의 1/2 혼합물은 항 파이로리 부착 억제 효과는 우수한 것으로 나타났으나 프로폴리스, 올리브 잎 추출물 및 감초 추출물 혼합물과 비교하여 항산화 및 항염

Importance: The Comprehensive Care for Joint Replacement (CJR) model, a traditional Medicare bundled payment program for lower-extremity joint replacement, is associated with care for patients outside traditional Medicare. Whether CJR model outcomes have differed by patient race or ethnicity outside of traditional Medicare is unclear. Objective: To evaluate outcomes associated with the CJR model among Hispanic patients not enrolled in traditional Medicare. Design, Setting, and Participants: This

This study employed inter-simple-sequence repeat (ISSR) to assess genetic variation among 189 individuals representing 10 populations (nine in Korea and one in Japan) of Millettia japonica, which has recently been lifted from the endangered species of Korea. The calculated Shannon's information index value (I = 0.2689) of the species was appreciable and was higher than other endangered leguminous woody taxa. Gochang (I = 0.2968), Namhae (I = 0.2951), and Mt. Toham (I = 0.2823) populations showed

Mycobacterium bovis W-1171 was isolated from a wild boar living in a free-ranging field in Gyeonggido, South Korea. The whole-genome sequence of this strain was determined in 50 contigs, which was 4,304,865 bp with a 65.57% G+C content. In total 3,945 protein-coding genes were predicted from this assembly.

Background: An association between sleep duration and a wide spectrum of diseases has been reported, but little is known about its relationship with bone mineral density (BMD). Previously conducted studies in Korea and abroad have reported results that are controversial. The present study sought to assess whether sleep duration can be considered an independent risk factor of osteoporosis.Methods: We included participants over the age of 60 years with data on self-reported habitual sleep duration

본 연구의 목적은 내면화된 수치심과 정서조절곤란의 관계에서 자기자비와 경험회피의 매개효과를 검증하는 것이다. 대학생 300명의 자료를 SPSS 27.0으로 통계분석을 하였고, 연구결과는 다음과 같다. 첫째, 변인 간 상관이 유의하게 나타났다. 둘째, 내면화된 수치심과 정서조절곤란의 관계에서 자기자비가 부분매개하는 것을 확인하였다. 셋째, 내면화된 수치심과 정서조절곤란의 관계에서 경험회피가 부분매개 하는 것으로 나타났다. 넷째, 내면화된 수치심과 정서조절곤란의 관계에서 자기자비, 경험회피가 순차적으로 매개하였다. 이는 수치심이 높은 대학생이 정서조절에의 어려움을 겪을 때, 자기자비를 높이고 경험회피를 낮추는 것이 상담개입 초점이 될 수 있음을 의미한다. 끝으로 연구의 의의 그리고 연구의 제한점 및 후속연구의 방향을 제시하였다.

Secretory carcinoma of the breast is a rare tumor of the ductal origin with a more favorable prognosis than the conventional ductal carcinoma. To the best of our knowledge, there are a few reports on fine needle aspiration cytology (FNAC) of secretory carcinoma in the English literature and one in the Korean literature. Recently, we experienced a case of secretory carcinoma of the breast performed by FNAC. The cytologic smears revealed several clusters and sheets of cohesive neoplastic cells in

Introduction: An athlete's heart (AH) varies depending on race, sex, age, and the type and intensity of training. Given that soccer is a common sport, evaluation of cardiac function in soccer players is important; however, few studies have analyzed adolescent soccer players. Therefore, this study, aimed to identify early changes in AH in soccer players by evaluating the echocardiographic findings of adolescent Asian female soccer players for whom existing data are scarce. Methods: We evaluated 2