Vitamin D and narrowband ultraviolet B phototherapy for chronic kidney disease-associated pruritus

( Youn Kyung Kee ),( Hee Jung Jeon ),( Jieun Oh ),( Dong Ho Shin ) 대한신장학회 2024 Kidney Research and Clinical Practice Vol.43 No.2

Background: In addition to improving the serum vitamin D balance, narrowband ultraviolet B (NB-UVB) phototherapy can effectively treat chronic kidney disease-associated pruritus (CKD-aP). We investigated the degree of CKD-aP amelioration according to changes in the serum vitamin D level after NB-UVB phototherapy. Methods: This was a before-after clinical study in patients with refractory CKD-aP on hemodialysis. NB-UVB phototherapy was administered thrice weekly for 12 weeks. The response of CKD-aP to NB-UVB phototherapy was assessed as the change in pruritus intensity over time. A rapid response was defined as a reduction in the visual analog scale (VAS) score of ≥50% within the first 6 weeks of NB-UVB phototherapy. Results: We included 34 patients in this study. Although serum 25-hydroxy vitamin D [25(OH)D] concentrations increased significantly, by a median of 17.4 ng/mL, after the phototherapy course, other serologic parameters did not change. NB-UVB phototherapy reduced the VAS score for pruritus intensity over time significantly more in patients with Δ25(OH)D of >17.4 ng/mL than in patients with Δ25(OH)D of ≤17.4 ng/mL (p = 0.001). Ten patients were rapid responders. Multivariate logistic regression analysis showed that Δ25(OH)D was independently associated with rapid response (odds ratio, 1.29; 95% confidence interval, 1.02-1.63; p = 0.04). Conclusion: The effect of NB-UVB phototherapy on patients with CKD-aP correlated with their increase in serum vitamin D levels. Further well-designed clinical and experimental studies are needed to clarify the relationship between NB-UVB phototherapy and serum vitamin D levels in patients with CKD-aP.

Comparison of Differences in Rice Quality Characteristics According to Cultivation Regions

Jieun Kwak,Mi-Jung Kim,Yong-Jae Won,Hun-Pal Moon,Hung-Goo Hwang,Induck Choi,You-Geun Oh,Yu-Chan Choi,Seon-Min Oh,Jeong-Heui Lee,Jeom-Sig Lee 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10

Korea’s agricultural technology has made remarkable progress since the Green Revolution in the 1970s. On the other hand, North Korea is still in short supply of food, and needs a stable food supply. Therefore, it is necessary to secure basic data for selecting North Korean-adaptable varieties in order to introduce South Korean varieties to North Korea when support for North Korea is needed in the future. In this study, 27 rice varieties applicable to North Korea were grown in Cheolwon (CW) and Ganghwa (GH) with similar climates to North Korea, and the quality factors of rice were compared. They showed that the rice grown in GH had higher protein and lower amylose contents than the rice grown in CW. Moreover, in the case of normal rice grown in CW, the ratio of head rice was 12% higher and the ratio of broken rice was 57% lower than that of rice grown in GH. The differences in rice composition and appearance quality of rice according to the cultivation region seems to be due to the fact that the length of day and temperature. The results of this study are expected to be useful in selecting and using rice varieties suitable for North Korea in the future.

The Role of Adiponectin in the Skin

( Jieun Oh ),( Yeongyeong Lee ),( Sae-woong Oh ),( Tiantian Li ),( Jiwon Shin ),( See-hyoung Park ),( Jongsung Lee ) 한국응용약물학회 2022 Biomolecules & Therapeutics(구 응용약물학회지) Vol.30 No.3

Adiponectin (Ad), a 30 kDa molecule, is an anti-diabetic adipokine; although derived from adipose tissue, it performs numerous activities in various other tissues. It binds to its own receptors, namely adiponectin receptor 1(AdipoR1), adiponectin receptor 2 (AdipoR2), and T-cadherin (CDH13). Ad plays several roles, especially as a regulator. It modulates lipid and glucose metabolism and promotes insulin sensitivity. This demonstrates that Ad has a robust correlation with fat metabolism. Furthermore, although Ad is not in direct contact with other tissues, including the skin, it can be delivered to them by diffusion or secretion via the endocrine system. Recently it has been reported that Ad can impact skin cell biology, underscoring its potential as a therapeutic biomarker of skin diseases. In the present review, we have discussed the association between skin cell biology and Ad. To elaborate further, we described the involvement of Ad in the biology of various types of cells in the skin, such as keratinocytes, fibroblasts, melanocytes, and immune cells. Additionally, we postulated that Ad could be employed as a therapeutic target to maintain skin homeostasis.

RS-LDPC Concatenated Coding for the Modern Tape Storage Channel

Jieun Oh,Jeongseok Ha,Hyegyeong Park,Jaekyun Moon Institute of Electrical and Electronics Engineers 2016 IEEE Transactions on Communications Vol. No.

<P>In modern tape storage, user data are recorded and retrieved along multiple tracks of rapidly moving, flexible magnetic medium that give rise to a variety of channel impediments including occasional long erasures, more frequent amplitude fades as well as a large amount of random errors. This work considers reliable recovery of data from such tape channels using a novel concatenation of an inner Reed-Solomon (RS) code and an outer nonbinary low-density parity-check (LDPC) code. This particular concatenation scheme and a highly tailored iterative decoding algorithm are chosen to efficiently handle the assortment of the tape channel impediments while meeting the stringent target error rate constraint as well as key practical requirements of the mass tape storage system. Despite the use of a nonbinary LDPC code, the proposed scheme allows excellent performance-complexity tradeoffs. In stark contrast to any existing coding schemes that involve LDPC codes, the proposed concatenation strategy allows semianalytic error rate performance evaluation at rates below what is possible using modern computers, thus providing an ability to ensure satisfactory low-error-rate performance.</P>

Directionally Antagonistic Graphene Oxide-Polyurethane Hybrid Aerogel as a Sound Absorber

Oh, Jung-Hwan,Kim, Jieun,Lee, Hyeongrae,Kang, Yeonjune,Oh, Il-Kwon American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.26

<P>Innovative sound absorbers, the design of which is based on carbon nanotubes and graphene derivatives, could be used to make more efficient sound absorbing materials because of their excellent intrinsic mechanical and chemical properties. However, controlling the directional alignments of low-dimensional carbon nanomaterials, such as restacking, alignment, and dispersion, has been a challenging problem when developing sound absorbing forms. Herein, we present the directionally antagonistic graphene oxide-polyurethane hybrid aerogel we developed as a sound absorber, the physical properties of which differ according to the alignment of the microscopic graphene oxide sheets. This porous graphene sound absorber has a microporous hierarchical cellular structure with adjustable stiffness and improved sound absorption performance, thereby overcoming the restrictions of both geometric and function-orientated functions. Furthermore, by controlling the inner cell size and aligned structure of graphene oxide layers in this study, we achieved remarkable improvement of the sound absorption performance at low frequency. This improvement is attributed to multiple scattering of incident and reflection waves on the aligned porous surfaces, and air-viscous resistance damping inside interconnected structures between the urethane foam and the graphene oxide network. Two anisotropic sound absorbers based on the directionally antagonistic graphene oxide-polyurethane hybrid aerogels were fabricated. They show remarkable differences owing to the opposite alignment of graphene oxide layers inside the polyurethane foam and are expected to be appropriate for the engineering design of sound absorbers in consideration of the wave direction.</P> [FIG OMISSION]</BR>

Converge

Jieun Oh(오지은),Ge Wang(왕거) 한국전자음악협회 2011 에밀레 Vol.9 No.1

《한데 모으기》는 일상 생활의 모든 곳에서 작용하여 작곡의 소재를 포착해내는 휴대용 컴퓨터 프로젝트이며, 이 소재들을 청각화, 시각화하는 공연을 통해 과거를 다시 맥락화하게 된다. 사람들은 일상의 순간에 휴대폰을 이용해 소리를 녹음하거나, 사진을 찍거나. 문자를 입력하여 작곡에 참여하게 된다. 이러한 시간과 장소가 인식된 스냅샷들이 모여서 《한데 모으기》가 공연되는 동안 현재의 시간과 장로로 수렴된다. 휴대용 컴퓨터 행위는 우리가 가는 곳 어디나 항상 동행함으로써 개인적이고 영향력 있는 음악적 경험을 만들어 내는, 이 작품의 중요한 역할을 담당한다. 이 글은 물리적, 정서적으로 편재하는 컴퓨터 행위에 의해 실현되는 유일한 작곡 모델로서의 《한데 모으기》에 대한 중요한 의의, 기술적 문제, 공연 문맥에 대한 자세한 기술도 포함하고 있다. Converge is a project that leverage ubiquity of mobile computing to capture compositional materials from our daily lives, which become recontextualized during a performance through a sonification and visualization of the past. Participants in the composition record sounds, take pictures, and submit text descriptions using mobile phones to capture their life moments. During the performance of Converge, these timestamped and location-tagged snapshots are brought together, converging to the present time and place. By accompanying us at all times wherever we go mobile computing serves a critical role in this composition, generating a musical experience that is personal and powerful. This paper details the overarching motivation, technical implementation, and performance context of Converge, viewed as a unique example of a composition realized by a new model of computing that is pervasive, both in the physical and affective sense.

A Two-Bit Weighted Bit-Flipping Decoding Algorithm for LDPC Codes

Oh, Jieun,Ha, Jeongseok IEEE 2018 IEEE communications letters Vol.22 No.5

<P>This letter proposes a novel two-bit weighted bit-flipping algorithm (TB-WBFA) for low-density parity-check (LDPC) codes on the binary symmetric channel. The proposed TB-WBFA produces reliability bits for the bit-decision results and syndrome values at bit and check nodes, respectively. The reliability bits are exchanged between bit and check nodes as the decoding proceeds. The message update in check nodes is carefully devised with simple bitwise operations, which are especially suitable for high-speed operations. It will be demonstrated that the proposed TB-WBFA achieves a significant performance improvement over existing bit-flipping decoding algorithms by conducting performance comparisons for LDPC codes under various setups, i.e., different rates, lengths, and structures.</P>

Content validity evaluation of items for the development of tools to evaluate the quality of adolescent diet

Jieun Oh,Ji Soo Oh,Ji-Yun Hwang,Young-Suk Lim,Hye-Young Kim(A) 한국식품영양과학회 2022 한국식품영양과학회 학술대회발표집 Vol.2022 No.10

Performance Comparison of Multi-level Coding Schemes for NAND Flash Memory

Jieun Oh,Seokju Han 대한전자공학회 2018 IEIE Transactions on Smart Processing & Computing Vol.7 No.6

Emerging three-dimensional (3D) NAND flash memory devices support new input/output (I/O) modes in which devices can program/read multiple pages sharing a common word line at the same operating time. The new I/O modes enable error-control systems to apply non-binary coding techniques, which are known to achieve capacity-approaching performance in a high signal-to-noise ratio (SNR) regime in conjunction with high-order modulations for NAND storage devices. This paper compares the performance of a number of multi-level-coding/multistage-decoding (MLC/MSD) schemes for NAND flash memory applications. By applying MLC/MSD techniques, it is possible to minimize the code rate loss caused by using the same code designed for the bit level of a page with the highest error rate equal to the remaining bit level of the pages. One considered scheme is an MLC/MSD method applied to 1D and 2D constellations with Bose-Chaudhuri-Hocquenghem (BCH) component codes. Another scheme compared is a special trellis-coded modulation (TCM) method with extra-strong error correction applied to subset labeling bits via Reed-Solomon (RS) code concatenation. In this paper, a new performance analysis method based on semi-analytical block-multinomial modeling is proposed to provide a simpler way to handle correlated error in TCM output. The analytical error rate results and semi-analytical error rate results based on the block multinomial model with the TCM scheme all indicate significant performance advantages from MLC/MSD schemes relative to the baseline BCH coding method.

사고 과정으로서의 ‘유추’에 대한 국어 교육적 접근 ― 개념 분석을 중심으로

오지은 ( Oh Jieun ) 국어교육학회 2020 國語敎育學硏究 Vol.55 No.4

이 연구의 목적은 지금까지 국어 교육 분야에서 다루어진 ‘유추’의 개념을 분석하여 사고 과정으로서 유추가 가지는 국어 교육적인 정위를 이론적으로 밝히는 것이다. 이 연구는 지금까지 유추를 논증 방법으로 제한하여 다루어 왔다는 문제의식에서 출발하였으며 유추를 사고의 과정으로 폭넓게 이해해야 함을 주장하였다. 연구 목적을 달성하기 위하여 개념 분석의 방법을 적용하였다. 개념 분석 결과 유추의 속성은 ‘목적성, 근거성, 유사 기반성, 적용성’으로 요약될 수 있었다. 또 유추의 선행 및 후행 요인을 확인하여 유추가 활용된 유형을 범주화하였으며 유추가 국어 교육적으로 가지는 특수성을 확인하였다. 유추의 관련 개념으로는 귀납, 추론, 은유, 규칙, 연상 등을 검토하였다. 나아가 분석 결과에 기초하여 유추를 국어 교육적에서 다루어야 할 사고의 유형으로 개념화하고 어휘·작문·문학·문법 교육에서 유추를 활용하는 방향을 제언하였다. This study aims to analyze the concept of “analogy” that has been considered in the Korean education field and theoretically reveal the status of analogy as a thinking process. Thus, a concept analysis was applied. Consequently, we presented the attributes, antecedents, consequences, and related terms of analogy. Based on the results, we conceptualized analogy as a thinking process that should be addressed in Korean education. Finally, we suggested using analogy in vocabulary, writing, literature, and grammar education.