COEFFICIENT DISCS AND GENERALIZED CENTRAL FUNCTIONS FOR THE CLASS OF CONCAVE SCHLICHT FUNCTIONS

Bhowmik, Bappaditya,Wirths, Karl-Joachim Korean Mathematical Society 2014 대한수학회보 Vol.51 No.5

We consider functions that map the open unit disc conformally onto the complement of an unbounded convex set with opening angle ${\pi}{\alpha}$, ${\alpha}{\in}(1,2]$, at infinity. We derive the exact interval for the variability of the real Taylor coefficients of these functions and we prove that the corresponding complex Taylor coefficients of such functions are contained in certain discs lying in the right half plane. In addition, we also determine generalized central functions for the aforesaid class of functions.

Coefficient discs and generalized central functions for the class of concave schlicht functions

Bappaditya Bhowmik,Karl-Joachim Wirths 대한수학회 2014 대한수학회보 Vol.51 No.5

We consider functions that map the open unit disc confor- mally onto the complement of an unbounded convex set with opening angle πα, α ∈ (1, 2], at infinity. We derive the exact interval for the vari- ability of the real Taylor coefficients of these functions and we prove that the corresponding complex Taylor coefficients of such functions are con- tained in certain discs lying in the right half plane. In addition, we also determine generalized central functions for the aforesaid class of functions.

진공증착기의 새로운 BOAT CONTROL 방식

WIRTH KARLHEINZ (사)한국포장협회 1999 包裝界 Vol.77 No.-

새로운 저항가열 보트컨트롤 방식은 증착공정의 가격을 절하시키면서 증착 품질은 월등히 향상시킬 것이다. 심지어는 지금까지의 기존 저항 가열방식으로는 성공할 수 없었던 금$\cdot$은 사용으로도 적용할 수 있는 새로운 세상을 열게 될 것이다.

Continuous Measurement of Vertical Distribution of CO₂ Concentration and Its Isotopic Signature in a Beech and a Pine Forest Soil

Stephan Wirth,Hubert Jochheim 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Swiss Noise Study 2000: Aircraft noise annoyance in the neighbourhood of the airport Zurich-Kloten

Katja Wirth,Mark Brink,Christoph Schierz 한국소음진동공학회 2003 한국소음진동공학회 국제학술대회논문집 Vol.2003 No.8

Are pulmonary hemostasis and fibrinolysis out of balance in equine chronic pneumopathies?

Ann Kristin Barton,Caroline Wirth,Angelika Bondzio,Ralf Einspanier,Heidrun Gehlen 대한수의학회 2017 Journal of Veterinary Science Vol.18 No.3

Clinical examination, bronchoalveolar lavage fluid (BALF) cytology, acute-phase protein, and pulmonary hemostasis and fibrinolysis marker (fibrinogen, serum amyloid A [SAA], and D-dimer) results were compared between control and respiratory disease-affected horses. Using a clinical scoring system, horses (n = 58) were classified as respiratory disease-free (Controls, n = 15) or with recurrent airway obstruction (RAO; n = 18), inflammatory airway disease (n = 14) or chronic interstitial pneumopathy (n = 11). There were no significant differences in fibrinogen concentrations among groups, but there was a trend toward a lower value in controls (median 0.0024 g/L) than in horses with chronic pneumopathies (median 0.0052 g/L), in particular, those with RAO (median 0.0062 g/L). Fibrinogen concentration was positively correlated with percentage of neutrophils in BALF (rs = 0.377, p = 0.004). SAA concentrations were low; 65.5% of samples were below the detection limit. D-dimer concentrations were also low and quantifiable concentrations were only obtained after ultrafiltration and only in RAO (median 0.1 mg/L). In conclusion, there was limited evidence of increased coagulatory activity in chronic pneumopathies, apart from RAO. It is uncertain whether fibrinogen and D-dimer concentrations increased due to their role as acute-phase proteins or as a misbalance of coagulation and fibrinolysis.

What We Have Learned from PISA so far: A German Educational Psychology Point of View

Detlev Leutner,Joachim Wirth 한국교육개발원 2005 KEDI Journal of Educational Policy Vol.2 No.2

After publication of the PISA 2000 results, the German newspapers were talking about the “PISA shock”. The competencies of German students in reading, mathematics, and science ranged below the OECD average. Although the PISA 2003 results showed small improvements in mathematics and science and above-average achievements in problem solving, the discussion continues. Not only are the unexpectedly low competencies of German students worrying, particularly alarming is the high correlation between students’ socio-economic/cultural background and students’ competencies, which indicates missing equity in the distribution of learning opportunities in Germany. As a consequence, the ministers of education of the 16 German federal states decided on measures for moving their education systems from an inputcontrolled to a more output-controlled format that is based on empirical research. Germany added national extensions to the international PISA test materials (a subscale of a German cognitive ability test, a computer-based test on dynamic problem solving, and a metacognitive nowledge test on reading strategies) for controlling, among others, the curricular validity of the tests and for developing when-and-why hypotheses. Over and above, members of the German PISA consortium received funding from the German National Research Association (DFG) for additional studies on testing those hypotheses.Thus, PISA not only caused intense political debates in Germany, but also a quantum advance in empirical educational research for justifying future political decisions based on empirical evidence.

Efficacy of conservative treatment of perianal abscesses in children and predictors for therapeutic failure

Boenicke, Lars,Doerner, Johannes,Wirth, Stefan,Zirngibl, Hubert,Langenbach, Mike Ralf The Korean Pediatric Society 2020 Clinical and Experimental Pediatrics (CEP) Vol.63 No.7

Background: The optimal management of perianal abscess in children is controversial. Purpose: To evaluate the efficiency of conservative treatment of perianal abscess in children and identify parameters that predict therapy failure. Methods: All cases of children younger than 14 years of age with perianal abscesses between 2001-2016 were evaluated. Results: Of the 113 enrolled patients, 64 underwent subsequent surgery for advanced disease (primary surgery group). Conservative treatment was initiated in 49 patients (primary conservative group) but was stopped because of inefficiency in 25 patients, who were referred for surgery after a median 7.03 days (range, 2 to 16 days). The other 24 patients (48%) initially achieved complete remission after conservative treatment, but 10 were readmitted after a median 34 months (range, 3 to 145 months) with recurrent disease. There were no significant differences in permanent success after conservative treatment between infants (10 of 29, 34%) and older children (4 of 20 [20%], P=0.122). Overall, conservative treatment alone was effective in only 14 of 113 patients. Recurrence after surgery occurred in 16 patients (25%) in the primary surgery group and 11 patients (22%) in the primary conservative group (P=0.75). Univariate analysis of predictors for conservative treatment failure revealed inflammatory values (C-reactive protein and white blood count, P=0.017) and abscess size (P=0.001) as significant parameters, whereas multivariate analysis demonstrated that only abscess size (odds ratio, 3.37; P=0.023) was significant. Conclusion: Conservative treatment of perianal abscess is permanently efficient in only a minority of children but is not associated with a higher recurrence rate after subsequent surgery. Abscess size is a predictor for therapy failure.

Modified embedded-atom method interatomic potential for theFe−Cualloy system and cascade simulations on pure Fe andFe−Cualloys

Lee, Byeong-Joo,Wirth, Brian D.,Shim, Jae-Hyeok,Kwon, Junhyun,Kwon, Sang Chul,Hong, Jun-Hwa American Physical Society 2005 Physical review. B, Condensed matter and materials Vol.71 No.18

Correlation between Isometric Maximum Strength and One Repetition Maximum in the Calf Muscle in Extended and Bended Knee Joint

Konstantin Warneke,Martin Hillebrecht,Klaus Wirth,Stephan Schiemann,Michael Keiner 국민체육진흥공단 한국스포츠정책과학원 2022 International Journal of Applied Sports Sciences Vol.34 No.1

Previous research points out high relevance of maximal strength measurement in the diagnostics of different populations. However, there is inconsistency in procedures of maximum strength measurements. Thus, it must be questioned whether the results from different studies are actually comparable. Due to the aforementioned problems in standardization, the aim of this study was to assess correlations between and reproducibility of isometric and dynamic strength testing. Since there are many studies investigating maximal strength in the calf muscles, this study will examine the plantar flexors. For this purpose, 87 active participants were recruited (m: 52, f: 35, age: 28.3 ± 5.5 years, range 18-38 years, height: 178.3 ± 6.6 cm, weight: 81.5 ± 7.4 kg) who performed maximal isometric strength testing and dynamic 1RM testing in plantar flexion both with extended and bended knee joint. Pearson correlation as well as concordance correlation coefficient (CCC) were determined. In literature, CCC is used to determine reproducibility between two different testing methods. There were correlation coefficients of r = 0.63 – 0.77 and =0.62 ‒ 0.77. Results are comparable with correlations between maximal isometric strength and 1-RM in previous studies in different movements. In consideration of CCC, isometric strength testing and 1RM seem to not measure the same parameter, therefore comparison of results measured with different procedures seems difficult. Our results exhibit a high influence of isometric maximal strength on 1RM performance. However, 1RM tests cannot be replaced by isometric strength testing. Care must be taken due to standardization of procedure when comparing results from different studies and, especially, if 1RM testing should be replaced with isometric strength measurement. Previous research points out high relevance of maximal strength measurement in the diagnostics of different populations. However, there is inconsistency in procedures of maximum strength measurements. Thus, it must be questioned whether the results from different studies are actually comparable. Due to the aforementioned problems in standardization, the aim of this study was to assess correlations between and reproducibility of isometric and dynamic strength testing. Since there are many studies investigating maximal strength in the calf muscles, this study will examine the plantar flexors. For this purpose, 87 active participants were recruited (m: 52, f: 35, age: 28.3 ± 5.5 years, range 18-38 years, height: 178.3 ± 6.6 cm, weight: 81.5 ± 7.4 kg) who performed maximal isometric strength testing and dynamic 1RM testing in plantar flexion both with extended and bended knee joint. Pearson correlation as well as concordance correlation coefficient (CCC) were determined. In literature, CCC is used to determine reproducibility between two different testing methods. There were correlation coefficients of r = 0.63 – 0.77 and =0.62 ‒ 0.77. Results are comparable with correlations between maximal isometric strength and 1-RM in previous studies in different movements. In consideration of CCC, isometric strength testing and 1RM seem to not measure the same parameter, therefore comparison of results measured with different procedures seems difficult. Our results exhibit a high influence of isometric maximal strength on 1RM performance. However, 1RM tests cannot be replaced by isometric strength testing. Care must be taken due to standardization of procedure when comparing results from different studies and, especially, if 1RM testing should be replaced with isometric strength measurement.