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Strength and deflection prediction of double-curvature reinforced concrete squat walls
Bali, Ika,Hwang, Shyh-Jiann Techno-Press 2007 Structural Engineering and Mechanics, An Int'l Jou Vol.27 No.4
This study presents a model to better understand the shear behavior of reinforced concrete walls subjected to lateral load. The scope of the study is limited to squat walls with height to length ratios not exceeding two, deformed in a double-curvature shape. This study is based on limited knowledge of the shear behavior of low-rise shear walls subjected to double-curvature bending. In this study, the wall ultimate strength is defined as the smaller of flexural and shear strengths. The flexural strength is calculated using a strength-of-material analysis, and the shear strength is predicted according to the softened strut-and-tie model. The corresponding lateral deflection of the walls is estimated by superposition of its flexibility sources of bending, shear and slip. The calculated results of the proposed procedure correlate reasonably well with previously reported experimental results.
Enhancement of soft magnetic properties by nanocrystallization in modified cast iron
Bali, Rantej,Fleury, Eric,Lim, SangHo Elsevier 2005 SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS Vol.6 No.3-4
<P><B>Abstract</B></P><P>A cast iron composition has been modified by additions of Al, B, Y and Cu to the Fe–C master alloy in order to achieve glass forming ability as well as good magnetic properties. Amorphous ribbons were synthesized by rapidly quenching at 10<SUP>6</SUP>K/s and the devitrification process was controlled by varying the Y and Cu contents so as to achieve a composite structure of bcc Fe nanocrystals in an amorphous matrix. An improvement of saturation magnetization was observed by annealing the as-quenched ribbons. However, coercivity does not necessarily improve upon annealing, and therefore, the annealing should be judiciously scheduled. Effect of minor impurities in cast iron on the coercivity and saturation of these alloys was found to be insignificant.</P>
Tarun Bali,Malhar N Kumar 대한척추외과학회 2015 Asian Spine Journal Vol.9 No.5
Study Design: Prospective cohort study. Purpose: To evaluate the contribution of upper and lower lumbar segments to flexion and extension of the lumbar spine in normal and diseased spines. Overview of Literature: The specific contributions of upper and lower lumbar segments during flexion/extension have rarely been reported. Furthermore, no comparisons between the flexion/extension behaviors of normal and diseased spines have been reported until now. Methods: Flexion and extension lateral radiographs of 52 adult, asymptomatic volunteers, and 67 adult patients with lumbar spine disc disease were measured using software for total lumbar lordosis, upper lumbar lordosis and lower lumbar lordosis and the intervertebral angles of all segments. Results: In asymptomatic volunteers, the range of movement between flexion and extension was a mean of only 4.2° in the lower lumbar spine and a mean of 19.4° in the upper lumbar spine. In patients with disc degeneration, the range of movement between flexion and extension was an average 6.5° for lower lumbar spine and 15.6° for the upper lumbar spine. Conclusions: The results showed that upper lumbar spine contributes more to the range of motion in flexion and extension than the lower lumbar spine in asymptomatic individuals without lumbar disc disease, as well as in patients with disc degeneration.
Pediatric Femoral Neck Fractures: Our 10 Years of Experience
Kamal Bali,Pebam Sudesh,Sandeep Patel,Vishal Kumar,Uttam Saini,M. S. Dhillon 대한정형외과학회 2011 Clinics in Orthopedic Surgery Vol.3 No.4
Background: Femoral neck fractures are rare injuries in children, but the high incidence of long term complications make it animportant clinical entity. The aim of this retrospective study was to analyze the clinical outcomes of pediatric femur neck fracturesthat we managed over a 10 year period. Methods: The study included 36 children (20 boys and 16 girls) who sustained femoral neck fractures and completed a minimumfollow-up of one year. The children were treated either conservatively, or by open reduction and internal fi xation (ORIF), or closedreduction and internal fi xation (CRIF). The outcomes were analyzed using Ratliff criteria and a detailed record of complicationswas kept for all patients. Results: The mean age of included patients was 10 years (range, 3 to 16 years) and the average follow-up was 3.2 years (range,1.1 to 8.5 years). Based on Delbet’s classifi cation system, there were 0 type I (transepiphyseal), 16 type II, 11 type III, and 9 type IVfractures. There were 8 undisplaced fractures, 4 of which later displaced after being managed initially in a hip spica. A satisfactoryoutcome was obtained in 27 (75%) children. Avascular necrosis (AVN) was the most common complication. It was seen in7 of our patients, all of whom had an unsatisfactory outcome. Other complications included three cases each of coxa vara, nonunion,and arthritic changes; and one case each of infection, primary screw perforation of head, and premature epiphyseal closure. Complications were lowest in the group treated by ORIF. Only 2 patients managed exclusively by conservative treatment ultimatelyachieved a satisfactory outcome. Conclusions: We believe that internal fi xation of pediatric femoral neck fractures is preferred whenever feasible because conservativetreatment carries a high risk of failure of reduction. Aggressive operative treatments aimed at anatomical reduction shouldbe the goal and there should be no hesitation in choosing ORIF over CRIF. Outcome of patients is infl uenced primarily by developmentof AVN which occurs as an independent entity without much relation to the mode of treatment carried out.
Tuluy Yavuz,Bali Zülfükar Ulaş,Ünsal Merve Özkaya,Parspancı Aziz,Yoleri Levent,Çiçek Çağla,Filinte Gaye Taylan 대한성형외과학회 2023 Archives of Plastic Surgery Vol.50 No.6
Background The anterolateral thigh (ALT) flap is a preferred option in the reconstruction of a wide variety of defects, enabling multiple tissue components and thicknesses.Methods This study was conducted to investigate the correlation of the thickness of the traditional subfascial ALT flap and superficial fat flap with age, gender, and body mass index (BMI). A total of 42 patients (28 males and 14 females) were included in the study.Results Mean age was 50.2 (range, 16–75) years and mean BMI was 24.68 ± 4.02 (range, 16.5–34.7) kg/m2. The subfascial flap thickness was significantly thinner in male patients (16.07 ± 2.77 mm) than in female patients (24.07 ± 3.93 mm; p < 0.05), whereas no significant difference was found between male (4.28 ± 1.15 mm) and female patients (4.85 ± 1.09 mm) regarding superficial fat flap thickness (p = 0.13). The thickness of both flaps had a positive correlation with BMI, and the strongest correlation was found for subfascial ALT thickness in female patients (r = 0.81). Age had no effect on both flap thickness measurements. The anterior thigh is thicker in women than in men, although it varies according to BMI. This shows that flap elevation is important in the superthin plane, especially if a thin flap is desired in female patients in defect reconstruction with the ALT flap. Thus, a single-stage reconstruction is achieved without the need for a defatting procedure after subfascial dissection or a second defatting procedure 3 to 6 months later.Conclusion The appropriate ALT flap plane should be selected considering the gender and BMI of the patient.
Cranially-based nasolabial flaps for the reconstruction of nasal surgical defects
Kerem, Hakan,Bali, Ulas,Sonmez, Erhan,Evrenos, Mustafa Kursat Korean Society of Plastic and Reconstructive Surge 2018 Archives of Plastic Surgery Vol.45 No.2
Background Cranially-based nasolabial flaps are a good alternative for the reconstruction of nasal defects. Methods A cranially-based nasolabial flap was used in 18 patients to reconstruct defects of the nose from 2010 to 2016, and the long-term results are presented in this report. Results Fifteen of the flaps completely survived. All the patients had a bulky appearance, but they did not want to undergo a second operation for cosmesis. The dissection of the flap took approximately 20 minutes, and the total operation lasted for 1 hour. The patients were hospitalized for 1-7 days, and the postoperative follow-up period was 1-28 months (mean, 17 months). Conclusions The cranially-based nasolabial flap possesses all the advantages of the traditional forehead flap, and can safely be used in selected cases.
Prolyl 4 Hydroxylase: A Critical Target in the Pathophysiology of Diseases
Kant, Ravi,Bali, Anjana,Singh, Nirmal,Jaggi, Amteshwar Singh The Korean Society of Pharmacology 2013 The Korean Journal of Physiology & Pharmacology Vol.17 No.2
Prolyl 4 hydroxylases (P4H) are iron- and 2-oxoglutamate-dependent dioxygenase enzymes and hypoxia-inducible transcription factor (HIF)-P4Hs play a critical role in the regulating oxygen homeostasis in the local tissues as well in the systemic circulation. Over a period of time, a number of prolyl hydroxylase inhibitors and activators have been developed. By employing the pharmacological tools and transgenic knock out animals, the critical role of these enzymes has been established in the pathophysiology of number of diseases including myocardial infarction, congestive heart failure, stroke, neurodegeneration, inflammatory disease, respiratory diseases, retinopathy and others. The present review discusses the different aspects of these enzymes including their pathophysiological role in disease development.