• Title/Summary/Keyword: Laxity

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A Real-Time Scheduling Mechanism in Multiprocessor System for Supporting Multimedia (멀티미디어 지원을 위한 다중 프로세서 시스템에서 실시간 스케줄링 기법)

  • 임순영;이재완;전칠환
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.1 no.2
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    • pp.159-168
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    • 1997
  • This paper presents a mechanism which supplies tasks with fast turn-around time on real-time multimedia environments. Tasks are classified into periodic and aperiodic tasks according to their executing period, and the types of them are classified into three groups : critical tasks, essential tasks and common tasks by the degree of its urgency. In the case of periodic tasks, we defer the execution of it within the extent to keep the deadline as long as possible and serve the aperiodic tasks, and provide aperiodic tasks with fast turn-around time. Changing the priority of each task is allowed within the same type and it is scheduled by using the dynamic priority. The emergency tasks are executed within deadline in any circumstances, and the least laxity one is served first when many real-time tasks are waiting for execution. The result of simulation shows that the proposed mechanism is better than the EDZL, known as suboptimal in multiprocessor systems, in the point of rum-around time.

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Radiofrequency Shrinkage Method for Minor Degree of Cruciate Ligament Injury of knee joint (경도의 슬관절 십자 인대 손상환자에 대하여 시행한 열 위축술)

  • Moon Young Lae;Ha Sang Ho;You Jae Won;Joo Jeong Yong;Ju Pyong
    • Journal of Korean Orthopaedic Sports Medicine
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    • v.1 no.1
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    • pp.37-42
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    • 2002
  • Purpose : To report a short-term clinical results and technical method of thermal shrinkage with radiofrequency device for anterior and posterior cruciate ligament laxity which is not suitable to indications of reconstructive surgery. Materials and Methods : Nine cases of anterior cruciate ligament injuries (ACL), 5 cases of posterior cruciate ligament (PCL) injuries and 3 cases of combined anterior and posterior cruciate ligament injuries, in which the condition is not indicated as reconstructive surgery, are investigated. The follow-up period averaged 6 months. Results : Instability in living activity, limping and pain were improved with excellent results. But, posterior cruciate ligament thermal shrinkage revealed as recurrent knee laxity progressively Conclusions : The result of thermal shrinkage for partial tear of cruciated ligament was excellent. We believe this procedure is applicable to partial tear of the ACL or PCL which reconstructive surgery is not indicated. Long-term follow-up results were needed.

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Minimal Ablation of the Tibial Stump Using Bony Landmarks Improved Stability and Synovial Coverage Following Double-Bundle Anterior Cruciate Ligament Reconstruction

  • Kodama, Yuya;Furumatsu, Takayuki;Hino, Tomohito;Kamatsuki, Yusuke;Ozaki, Toshifumi
    • Knee surgery & related research
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    • v.30 no.4
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    • pp.348-355
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    • 2018
  • Purpose: To evaluate the clinical effects of using anatomical bony landmarks (Parsons' knob and the medial intercondylar ridge) and minimal ablation of the tibial footprint to improve knee anterior instability and synovial graft coverage after double-bundle anterior cruciate ligament reconstruction. Materials and Methods: We performed a retrospective comparison of outcomes between patients who underwent reconstruction with minimal ablation of the tibial footprint, using an anatomical tibial bony landmark technique, and those who underwent reconstruction with wide ablation of the tibial footprint. Differences between the two groups were evaluated using second-look arthroscopy, radiological assessment of the tunnel position, postoperative anterior knee joint laxity, and clinical outcomes. Results: Use of the anatomical reference and minimal ablation of the tibial footprint resulted in a more anterior positioning of the tibial tunnel, with greater synovial coverage of the graft postoperatively (p=0.01), and improved anterior stability of the knee on second-look arthroscopy. Both groups had comparable clinical outcomes. Conclusions: Use of anatomical tibial bony landmarks that resulted in a more anteromedial tibial tunnel position improved anterior knee laxity, and minimal ablation improved synovial coverage of the graft; however, it did not significantly improve subjective and functional short-term outcomes.

Radiofrequency thermal Shrinkage for Elongated Anterior Cruciate Ligament after Anterior Cruciate Ligament Reconstruction (전방십자인대 재건술 이후 이완된 전방십자인대에 시행한 고주파 에너지 열 수축)

  • Kim, Yeung-Jin;Chun, Churl-Hong;Kim, Tae-Kyun;Yang, Hwan-Deok;Kim, Hyoung-Joon;Kim, Young-Jin
    • Journal of Korean Orthopaedic Sports Medicine
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    • v.7 no.1
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    • pp.27-32
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    • 2008
  • Purpose: To evaluate the clinical results of the patients who underwent radiofrequency thermal shrinkage (RFTS) for treatment of anterior cruciate ligament (ACL) laxity after ACL reconstruction. Material and Methods: From October 1999 to March 2006, we performed 133 cases of ACL reconstruction. Among them we experienced 16 patients who had the laxity of reconstructed ACL in second look arthroscopy. Mean follow-up was 20.4 months. Mean age was 33.5 years. 12 cases were male and 4 cases were female. The elongated ACL were treated by bipolar radiofrequency energy with an output of grade II. Subjective and objective parameters were utilized in analyses, such as: the mean range of motion, Lysholm knee score, Tegner activity score, Lachman test, IKDC score. Wilcoxon signed-rank test was used to perform the data analysis. P<0.05 was considered to be statistically significant. Results: Postoperative mean Lysholm knee score (preop: $82.2{\pm}5.2(77{\sim}85))$ (P=0.04), postop: $85.2{\pm}4.8$(82-90)) and anterior displacement by the Telos stress test (preop: $5.4{\pm}4.6(3{\sim}10)mm$, postop: $2.1{\pm}1.9(0{\sim}4)mm)$ (P=0.02), Lachman's test, and IKDC scores (P=0.04) demonstrated significant differences statistically compared to the preoperative. There were no statistical differences in mean range of motion, Tegner activity scale. Conclusions: Arthroscopic shrinkage for the ACL laxity after ACL reconstruction with radiofrequency device showed good clinical results and was applicable operative technique.

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The Real-Time Scheduling Mechanism Based on Central Scheduler in Multiprocessor System (다중처리기 시스템에서 중앙 스케쥴러를 기반으로 한 실시간 스케쥴링 기법)

  • 이경복;윤인숙;이재완
    • Proceedings of the Korean Information Science Society Conference
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    • 1998.10a
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    • pp.113-115
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    • 1998
  • 다중프로세서 환경에서 타스크들을 할당해주는 중앙 프로세서를 두고 Laxity를 기반으로 긴급타스크를 선택하여 스케쥴링을 수행한다. 중앙프로세서는 프로세서들의 슬랙시간과 각 프로세서의 Local큐에 대기하고 있는 비주기적 타스크의 총 수행시간 등의 상태정보를 수집 분석하여, 타스크의 실행시간에 가장 적합한 프로세서를 선xor하여 할당한다. 또한 타스크 특성에 따라 주기적 타스크와 비주기적 타스크로 나누고 주지적 타스크는 마감시간을 지키는 범위 내에서 최대한 수행시간을 연기 시켰다. 시뮬레이션 결과 Overload(마감시간을 지키지 못하는 타스크)수의 감소와 빠른 응답시간을 제공함을 알 수 있었다.

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A Case of Wandering Spleen (유주 비장 1례)

  • Lee, Suk Jin;Kim, Yong Woo;Chun, Yong Soon;Song, Min Seob
    • Pediatric Gastroenterology, Hepatology & Nutrition
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    • v.7 no.2
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    • pp.248-252
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    • 2004
  • Wandering spleen is a rare condition characterized by migration of the spleen from its normal position due to laxity or absence of the supporting splenic ligaments. Ultrasonography shows the absence of the spleen in left upper quadrant (LUQ) and the presentation in the lower abdomen of a homognous mass whose sonographic appearance is consistent with that of a spleen. Contrast-enhanced CT reveals the absence of the spleen in LUQ, a soft tissue mass resembling spleen in the lower abdomen, and the splenic pedicle of whirled appearance. We present a case of wandering spleen, which could be diagnosed with US and CT by the ectopic location of spleen and the whirling pattern of splenic pedicle.

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Implementation of an LLF Scheduler for the Hard Real-time OS, RT-eCos3.0 (경성 실시간 운영체제 RT-eCos3.0을 위한 LLF 스케줄러의 구현)

  • Yoo, Hwee-Jae;Kim, Jung-Guk
    • Proceedings of the Korean Information Science Society Conference
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    • 2011.06b
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    • pp.395-397
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    • 2011
  • RT-eCos3.0은 대표적 분산 실시간 객체 모델인 TMO(Time-triggered Message-triggered Object)의 실행을 제공하기 위하여 공개소스 eCos3.0 기반으로 개발된 초경량 경성 실시간 임베디드 운영체제이다. RT-eCos3.0에서는 그간 스레드의 최장 수행 시간 입력이 필요 없는 EDF 및 FIFO 스케줄러를 지원하여 왔다. 본 논문에서는 TMO의 시간 구동 스레드와 메시지 구동 스레드의 스레드 등록 시 최장 수행 시간을 입력 받아 이를 기반으로 마감시간까지의 수행시간 대비 잔여시간을 이용하는 LLF (Least Laxity First) 스케줄러를 클럭 인터럽트 핸들러 내에 구현하고 각 스레드로 하여금 스케줄링 정책을 선택할 수 있도록 구현하였다.

What Should We Treat For Recurrent Dislocation? (재발성 탈구에서 무엇을 치료할 것인가?)

  • Tae Suk-Kee
    • Clinics in Shoulder and Elbow
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    • v.7 no.1
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    • pp.1-4
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    • 2004
  • As the multidirection and posterior instabilities of the shoulder are not only uncommon but responds well to conservative treatment, the shoulder instabilities which requires surgical treatment are traumatic anterior type in most cases, Although various surgical procedures had been used in the past, Bankart procedure is the standard surgical method as a primary procedure in traumatic anterior instability, Nevertheless there has been changes in the techniques of Bankart procedure in order to minimize decrease of external rotation and effectively address capsular laxilty, Capsular shift might be needed if there remains excessive capsular laxity of the inferior capsule after repair of the Bankart lesion, Large bony Bankart lesion should be fixed if possible and severe glenoid rim erosion requires extracapsular bone block after repair of the capsule. Although a few surgical procedures are described for the management of Hill-Sachs lesion in special circumstances, Hill-Sachs lesion does not usually need to be addressed.

Osteogenesis Imperfecta (Correction of Anterior Tibial Bowing) - A case report - (골형성 부전증환자의 경골 전방만곡 교정 치험례)

  • Seo, Jae-Sung;Ihn, Joo-Chul
    • Journal of Yeungnam Medical Science
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    • v.4 no.1
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    • pp.157-163
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    • 1987
  • Osteogenesis imperfecta has been categorized as a heritable disorder of connective tissue affecting both bone and soft tissues and is characterized by fragility of bone, blue sclerae, and deafness, less frequently by dentinogenesis imperfecta and laxity of ligament. The goals of orthopedic management with osteogenesis imperfecta are the treatment of acute fractures and long-term rehabilitation in an effort to maintain ambulation. We report a case of osteogenesis imperfecta with anterior bowing of tibia which was successfully corrected by multiple osteotomies and intramedullary fixation by Sofield method and reviewed literatures.

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Chronic dislocation of temporomandibular joint persisting for 6 months: a case report

  • Kim, Chul-Hwan;Kim, Dae-Hyun
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.38 no.5
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    • pp.305-309
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    • 2012
  • Temporomandibular joint (TMJ) subluxation and dislocation are uncommon but very unpleasant and distressing conditions to patients. Subluxation of the TMJ is an excessively abnormal condylar excursion secondary to flaccidity and laxity of the capsule. When the condyle head excurses anterior to the eminence upon wide opening, it can return to the fossa by self-manipulation or non-surgical conservative reduction. Surgery is recommended if a complete dislocation, so-called open lock, occurs as a chronic or recurrent protracted condition that cannot be reduced voluntarily. A range of surgical procedures can be performed to limit condylar hypermobility inclusing soft tissue tethering, creation of articular obstacles, removal of mechanical blockade and augmentation of articular eminence using different kinds of grafts. In the present case, a 74-year-old woman was diagnosed with a chronic TMJ dislocation that had lasted for 6 months. Bilateral condylectomy was performed and the post-operative results were good without functional limitations or recurrence.