• Korean Journal of Radiology
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• v.20 no.6
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• pp.939-946
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• 2019

Objective: To report our initial experience of percutaneous sacroplasty (PSP) with an interpedicular approach for treating painful sacral metastases involving multiple sacral vertebral bodies. Materials and Methods: This study prospectively enrolled 10 consecutive patients (six men and four women; mean age, 56.3 ± 13.8 years) who underwent PSP for painful sacral metastases involving multiple sacral vertebral bodies from March 2017 to September 2018. Visual analogue scale (VAS) scores, Oswestry disability index (ODI) values, and the number of opioids prescribed to the patients were assessed before and after PSP. The procedure duration, length of hospitalization, and complications were also recorded. Results: Mean VAS and ODI declined significantly from 6.90 ± 1.20 and 74.40 ± 5.48 before the procedure to 2.70 ± 1.34 and 29.60 ± 14.57 after the procedure, respectively (p < 0.01). The median number of opioids prescribed per patient decreased from 2 (interquartile range [IQR] 1-3) pre-procedure to 1 (IQR 0-3) post-procedure (p < 0.01). Nine of the 10 patients showed no or decreased opioid usage, and only 1 patient showed unchanged usage. The mean procedure duration was 48.5 ± 3.0 minutes. The average length of hospitalization was 4.7 ± 1.7 days. Extraosseous cement leakage occurred in three cases without causing any clinical complications. Conclusion: PSP with an interpedicular approach is a safe and effective treatment in patients with painful sacral metastases involving multiple sacral vertebral bodies and can relieve pain and improve mobility.

• Journal of Chest Surgery
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• v.29 no.5
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• pp.536-541
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• 1996

Between June 1988 and June 1994, twenty five patients with locAlly advanced esophageal carcinoma received preoperative chemotherapy (Cisplatln, 5-Fluorouracil with or without Etoposide) and followed by resection. All patients had clinical evidence of airway involvement or distant Iymphnode involve- ment (M 1 Iymphnode) on bronchoscopy or computed tomographic scans. The major response rate to chemotherapy decided by the postoperative stage was 48% (12125). The resection rate was 92% (23/25) with overall complete resection rate of 72% (18125). Two patients had exploratory laparotomy (thorn- cotomy) only. Thirteen patients had esophagogastrostomy with a combined abdominl and Rt. thoracic approach (Ivor Lewis operation), slx pAtients had transhiatal esophagectomy, four patients had esophagogastrostomy with a combined Rt. thoracotonly & abdominal, cervical approach. There were three postoperative deaths (12%). Follow-up duration was between 3.3 months to 65 months. Median survival ime of resected patients except hospital death was 14.8 months. Actuarial survival at 12, 24 months was 72.9%, 26.2%. Signifi- cant better survival was associated with responder group (postoperative stage less than lIB) (P=0.029). These results demonstrate that 1) Preoperative Cisplatin based combined chemotherapy Produce high response rate, 2) High complete resection rate with acceptable mortality rate occur after preoperative chemotherapy, 3) Better surviL dl can be anticipated if complete resection performed after major re- sponse to preoperative chemotherapy.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.9
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• pp.4418-4437
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• 2017

In this paper a three-phase secure compressive sensing (CS) and received signal strength (RSS) based target localization approach is proposed to mitigate the effect of malicious node attack. RSS measurements are first arranged into a group of subsets where the same measurement can be included in multiple subsets. Intermediate target position estimates are then produced using individual subsets of RSS measurements and the CS technique. From the intermediate position estimates, the residual error vector and residual error square vector are formed. The least median of residual error square is utilized to define a verifier parameter. The selected residual error vector is utilized along with a threshold to determine whether a node or measurement is under attack. The final target positions are estimated by using only the attack-free measurements and the CS technique. Further, theoretical analysis is performed for parameter selection and computational complexity evaluation. Extensive simulation studies are carried out to demonstrate the advantage of the proposed CS-based secure localization approach over the existing algorithms.

• Journal of Families and Better Life
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• v.21 no.2
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• pp.87-101
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• 2003

The purposes of this study were to analyze causes of wife abuse through married couples as the research subject. The study employed ecological perspective to the study of wife abuse as an multiple dimensional and integrated paradigm combined with isolated theories of other research. The subjects were 369 married couples who live in Gwangju area. Data were analyzed with Cronbach'α, factor analysis, basic statistics, paired-t test, 1-test, ANOVA, Duncan's test, correlation analysis, stepwise multiple regression analysis. and hierarchical regression analysis using the SPSS 10.0 for windows. The major findings were as follows; 1. The psychological abuse score, physical abuse score, and sexual abuse score were lower than median without exception. Hut prevalence rates of wife abuse were considerably serious; 91.9% psychological abuse, 44.4% physical abuse, and 53.7% sexual abuse. 2. The results of the hierarchical regression analysis indicated that the marital conflict had the strongest impact on wife abuse. And the attitude toward wife abuse of husband, hostility of husband, exposure experience of domestic violence during a growth period of husband, perception toward social violence of husband, exposure experience of domestic violence during a growth period of wife, drinking problem of husband, and interpersonal relationships stress of husband had influenced on wife abuse. These variables accounted for 49.5% of variance of wife abuse behaviors. As the result of the study, it concludes that the ecological systemic approach on the cause of wife abuse is useful as a theoretical instrument. Suggestions and implications are made for further research and practical application.

• Childhood Kidney Diseases
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• v.23 no.2
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• pp.116-120
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• 2019

Bilateral renal obstruction is a rare critical condition, requiring a prompt diagnostic approach and treatment to restore the renal function. The most commonly observed obstructive uropathy in children is congenital malformation, such as posterior urethral valves and bilateral ureteropelvic junction obstruction. Malignant pelvic masses obstructing the ureter are widely reported in adults but are rarely observed in children. The treatment of ureteral obstruction related to pelvic malignancy is a therapeutic challenge with a median survival duration of 3-7 months in adults; however, pediatric patients with pelvic malignancy leading to ureteral obstruction had better outcomes, with a reported 5-year mortality rate of 20%, than the adult patients. Here, we report a rare case of bilateral ureteral obstruction associated with pelvic rhabdomyosarcoma presenting with acute kidney injury treated by ureteral diversion with double J stent, and concommittent emergency hemodialysis, leading to restoration of good renal function. We suggest that bilateral ureteral obstruction should be released as soon as possible using surgical or interventional approach to minimize the obstruction period, and subsequential chemotherapy may contribute to improvement of survival and recovery of renal function.

• Nuclear Engineering and Technology
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• v.53 no.12
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• pp.3944-3951
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• 2021

Several reasons such as no free lunch theorem indicate that there is not a universal Feature selection (FS) technique that outperforms other ones. Moreover, some approaches such as using synthetic dataset, in presence of large number of FS techniques, are very tedious and time consuming task. In this study to tackle the issue of dependency of estimation accuracy on the selected FS technique, a methodology based on the heterogeneous ensemble is proposed. The performance of the major learning algorithms of neural network (i.e. the FFNN-BR, the FFNN-LM) in combination with the diverse FS techniques (i.e. the NCA, the F-test, the Kendall's tau, the Pearson, the Spearman, and the Relief) and different combination techniques of the heterogeneous ensemble (i.e. the Min, the Median, the Arithmetic mean, and the Geometric mean) are considered. The target parameters/transients of Bushehr nuclear power plant (BNPP) are examined as the case study. The results show that the Min combination technique gives the more accurate estimation. Therefore, if the number of FS techniques is m and the number of learning algorithms is n, by the heterogeneous ensemble, the search space for acceptable estimation of the target parameters may be reduced from n × m to n × 1. The proposed methodology gives a simple and practical approach for more reliable and more accurate estimation of the target parameters compared to the methods such as the use of synthetic dataset or trial and error methods.

• Journal of the Korean Mathematical Society
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• v.35 no.3
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• pp.755-764
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• 1998

The least informative distributions minimizing Fisher information for location are obtained in the classes of continuously differentiable and piece-wise continuously differentiable densities with the additional restrictions on their values at the median and mode of population in the point and interval forms. The structure of these optimal solutions depends both on the assumptions of smoothness and form of characterizing restrictions of the class of distributions: in the class of continuously differentiable densities, the least informative distributions are finite and have the cosine-type form, and, in the class of piece-wise continuously differentiable densities, the least informative densities have exponential-type tails, the Laplace density in particular. The dependence of optimal solutions on the assumptions of symmetry is also analyzed.

• Journal of Korean Society of Transportation
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• v.12 no.1
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• pp.117-132
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• 1994

Drivers select approach lane according to various traffic situations as well as their destination. This behavior affects the utilization of lanes and capacity analysis at urban signalized intersections. This paper presents the concept, behavior of lane utilization, and the lane utilization factors which included in the study. Preparation of Korean Highway Capacity Manual (1992). Lane utilization is affected by various traffic and geometric factors which are roadway side friction, median friction, and number of lanes, etc. and it converges to an equal utilization as the degree of saturation (V/C ratio) increase. Lane utilization factor is suggested by the degree of saturation and the number of lanes, and it is presented in this paper.

• Journal of Families and Better Life
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• v.16 no.2
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• pp.1-10
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• 1998

This study purpose to know the degree of adolescent consumer's conspicuous consumption how difference do adolescent consumers' conspicuous consumption have by socio demographic variables socio-psychological variables consumer ability. Therefore we suggest the adolescent consumer's sound consumption to consumer education. To approach to above purpose the research question are as the followings. 1) The average level of conspicuous consumption a little low median point. This implies that comsumer education is necessary for the adolescent consumer in order to reduce the level of conspicuous consumption. 2) Theadolescent consumers' consumption differs significantly according to the sex(p<0.05) monthly mean income of family(P<0.01) degree of taking in massmedia (P<0.01) subjective status on oneself(P<0.01) consumer socialization(P<0.01) 3) According to the results of the regression analysis examining the relative influences of variables affecting for conspicuous consumption the rela ive importance of the variables ; degree of taking in massmedia sex consumer knowledge communication with peers consumer attitude and the amount of allowance.

• Journal of Chest Surgery
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• v.17 no.2
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• pp.205-211
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• 1984

Developmental anomalies of the aortic arch, commonly known as vascular rings, are relatively rare congenital vascular anomalies which can compress the trachea and esophagus. We have presented six patients with surgically treated vascular rings at Seoul National University Hospital during the period June 1970 through May 1984. Two patients had double aortic arches and four patients had right aortic arch with aberrant left subclavian artery and left ligamentum arteriosum. Four patients had symptoms relating vascular ring and two patients were detected incidentally during diagnostic evaluation of symptomatic intracardiac defects. Associated congenital malformations were seen in four patients. The operative approach was through left thoracotomy in three patients and median sternotomy in remaining three patients associated with congenital cardiac defects. There were no postoperative deaths with excellent result in preoperative symptomatic patients. To our knowledge, successful surgical repair of vascular ring has been reported only once in the Korean literature.