• 제목/요약/키워드: r-closure

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The Closure Stage of Cranial Sutures in Correlation with Age (증령적 변화로서의 두개골 봉합의 유합 상태)

  • Ahn, Hyoung-Joon;Sin, Kyoung-Jin;Kwon, Jeong-Seung;Do, Hyung-Joo;Choi, Jong-Hoon;Kim, Chong-Youl
    • Journal of Oral Medicine and Pain
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    • v.26 no.4
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    • pp.377-393
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    • 2001
  • In order to study the closure stage of cranial sutures and its correlations with age, the ectocranial closure stage of coronal suture, sagittal suture, and lambdoidal suture of 67 skulls was measured. Among the skulls kept at the department of anatomy, college of medicine, Yonsei University, the ones with ages identified were used for this study. These measurements of suture closure were conducted by 4 examiners independently. The sutures were further divided by Frederic's method into 16 suture parts. The closure stages were classified by five stages of Broca-Ribbe. The following results were obtained: 1. The inter-observer reliability among 4 examiners showed high intraclass correlation coefficient of over 0.75(mean : 0.856) in all suture parts. Therefore, the determination of closure stage wasn't influenced by the subjective view of each examiner. 2. In all suture parts, the closure stage increased proportionally with age.(p<0.01) In terms of each suture part, the S2 part of sagittal suture showed the highest correlation(68.1%) while the L1-R part of lambdoidal suture showed the lowest correlation(51.3%). In addition, in terms of suture types, the correlation with age decreased in the order of sagittal suture(60.0%), coronal suture(57.7%), and lambdoidal suture (55.7%). In general, the average value of suture closure stages had 57.8% correlation with age(p<0.01). 3. The most frequent suture closure stage according to age group was '0' for ages below 30, '0' and '1' for ages within the 30's, '1' and '2' for ages within the 40's, and '2' for ages within the 50's. With older age groups, the frequency of '3' and '4' increased, and the suture closure stage increased proportionally with age. 4. The mean age by closure stage of each suture were within the 40's for the closure stage of '1', within the 50's for the closure stage of '2', and from 50's through 60's for the closure stage of '3'. The standard deviation was over 10 for all closure stages. In addition, at the same suture closure stage, the mean age according to the coronal suture was higher than the ages according to the sagittal suture or lambdoidal suture. Especially, C1-R, C1-L, C2-R, and C2-L parts showed the highest age when at the same suture closure stage. 5. The values appropriate for age estimations using suture closure stages of 16 suture parts were calculated, and a calculator for age estimation ($R^2=0.6944$, p<0.01) by ectocranial suture closure stage for Koreans is presented. From the above results, the method of using the closure stage of sutures of the skull to estimate age can be useful in individual identification of forensic science. Further extensive and accurate research using larger samples would be worthy of study.

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Influence of stress ratio and microstructural size on fatigue crack growth and crack closure in near-threshold (複合組織鋼의 疲勞균열진전거동과 균열닫힘조건에 미치는 應力比 및 微視組織크기의 영향)

  • 김정규;황돈영
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.12 no.6
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    • pp.1343-1349
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    • 1988
  • In this study, it is investigated for the effects of stress ratio and grain size on fatigue crack growth behavior and crack closure, in ferrite-martensite dual phase steels. The results obtained are as follows ; .DELTA. $K_{th}$ is independent of the ferrite grain size, but decreases with increasing stress ratio. The relation between .DELTA. $K_{th}$ and stress ratio R is as follows : .DELTA. $K_{th}$ =15.1(1-0.95R). But (.DELTA. $K_{eff}$)$_{th}$ in terms of crack closure is approximately 2.5 MPa.root.m. Also, variation of the degree of crack deflection to crack tip opening displacement at the minimum load is considered as a parameter of crack closure.e.e.

Comparing Conventional Suture Method Versus Wound Closure Using Tissue Glue(Histoacryl Blue®): a Prospective Randomized Clinical Trial (기존의 창상봉합과 Histoacryl Blue®를 이용한 창상봉합의 비교 분석: 전향적 무작위 임상실험)

  • Choi, Jong Woo;Hyun, Kyung Bae;Kim, Yong Oock;Park, Beyoung Yun
    • Archives of Plastic Surgery
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    • v.32 no.1
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    • pp.19-23
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    • 2005
  • Tissue adhesives have gained popularity for quicker and painless closure of lacerations. The use of tissue glue is currently popular for the closure of superficial lacerations, especially in children. Histoacryl $Blue^{(R)}$(2-N-butylcyanoacrylate) is a topical wound closure that precludes the need for foreign bodies to close wounds. The purpose of this study was to compare the applications of Histoacryl $Blue^{(R)}$(HAB) and conventional suture, regarding cosmetic outcome. To compare the short term and long term results of various repair methods, we designed the prospective, randomized, blind study. Patients with laceration undergoing repair were randomly allocated to conventional suture, subcutaneous suture plus HAB, and HAB only groups. The exclusion criterions were large wound that require large tension for repair or avulsion wound. An independent, blinded observer assessed cosmetic result at 7-10 days after repair and 3-9 months postoperatively. Physician's satisfaction with wound appearance was recorded on 100 mm Visual Analogue Scale(VAS)(0=worst, 100=best). The difference in VAS score between conventional suture method and subcutaneous suture plus HAB methods were not significant. Tissue glue being easy to use with no complications and still resulting in equivalent cosmetic outcomes has several benefits. Especially in the case of children, the wound closure with Histoacryl $Blue^{(R)}$ could be a good alternative for repair of laceration in emergency room.

ON SOME NEW CLASSES OF COMPACT-LIKE BITOPOLOGICAL SPACES

  • Afsan, BM Uzzal
    • Journal of the Chungcheong Mathematical Society
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    • v.33 no.2
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    • pp.271-285
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    • 2020
  • In this paper, we have introduced a new type of covering property ${\beta}^t_{({\omega}_r,s)}$-closedness, stronger than $P^t_{({\omega}_r,s)}$-closedness [3] in terms of (r, s)-β-open sets [9] and β-ωt-closures in bitopological spaces along with its several characterizations via filter bases and grills [15] and various properties. Further grill generalizations of ${\beta}^t_{({\omega}_r,s)}$-closedness (namely, ${\beta}^t_{({\omega}_r,s)}$-closedness modulo grill) and associated concepts have also been investigated.

Closure of a Postoperative Bronchopleural Fistula with Bronchoscopic Instillation of n-butyl-2-cyanoacrylate ($Histoacryl^{(R)}$) (N-butyl-2-cyanoacrylate($Histoacryl^{(R)}$)을 이용한 기관지흉막루의 치료 1예)

  • Cho, Jae-Hwa;Lee, Hong-Lyeol;Ryu, Jeong-Sun;Chun, Jeong-Bae;Lee, Don-Haeng;Yoon, Yong-Han;Kim, Kwang-Ho
    • Tuberculosis and Respiratory Diseases
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    • v.47 no.4
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    • pp.543-548
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    • 1999
  • Bronchopleural fistula(BPF) occurs as a postoperative complication in 2 to 5 percent of pulmonary resection. The detection of BPF is generally difficult and various diagnostic methods have been utilized to identify the site of the fistula in order to treat it adequately. Closure of these BPF can be surgical intervention or bronchoscopic application of various sealing agents. We report an experience with use of bronchoscopic instillation of n-butyl-2-cyanoacrylate($Histoacryl^{(R)}$) for closure of a postpneumonectomy BPF.

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An (r,s)-derived sets and double fuzzy closure operators

  • Zahran, Ahmed M.;Abd-Allah, M. Azab;EI-Saady, Kamal;EI-Rahman, Abd EI-Nasser G. Abd
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • v.8 no.1
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    • pp.6-10
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    • 2008
  • In this paper, we introduce the concept of fuzzy (r, s)-adherence points, fuzzy (r, s)-accumulation points and fuzzy (r, s)-derived sets in double fuzzy topology. We investigate some of their properties. The relationship with double fuzzy closure operator was studied.

ON v-MAROT MORI RINGS AND C-RINGS

  • Geroldinger, Alfred;Ramacher, Sebastian;Reinhart, Andreas
    • Journal of the Korean Mathematical Society
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    • v.52 no.1
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    • pp.1-21
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    • 2015
  • C-domains are defined via class semigroups, and every C-domain is a Mori domain with nonzero conductor whose complete integral closure is a Krull domain with finite class group. In order to extend the concept of C-domains to rings with zero divisors, we study v-Marot rings as generalizations of ordinary Marot rings and investigate their theory of regular divisorial ideals. Based on this we establish a generalization of a result well-known for integral domains. Let R be a v-Marot Mori ring, $\hat{R}$ its complete integral closure, and suppose that the conductor f = (R : $\hat{R}$) is regular. If the residue class ring R/f and the class group C($\hat{R}$) are both finite, then R is a C-ring. Moreover, we study both v-Marot rings and C-rings under various ring extensions.

△-CLOSURES OF IDEALS WITH RESPECT TO MODULES

  • Ansari-Toroghy, H.;Dorostkar, F.
    • Honam Mathematical Journal
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    • v.30 no.1
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    • pp.101-113
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    • 2008
  • Let M be an arbitrary module over a commutative Noetherian ring R and let ${\triangle}$ be a multiplicatively closed set of non-zero ideals of R. In this paper, we will introduce the dual notion of ${\triangle}$-closure and ${\triangle}$-dependence of an ideal with respect to M and obtain some related results.

STAR OPERATORS ON sn-NETWORKS

  • Lin, Shou;Zhang, Jinhuang
    • Communications of the Korean Mathematical Society
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    • v.27 no.3
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    • pp.621-627
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    • 2012
  • Star operations are defined by R. E. Hodel in 1994. In this paper some relations among star operators, sequential closure operators and closure operators are discussed. Moreover, we introduce an induced topology by a family of subsets of a space, and some interesting results about star operators are established by the induced topology.