778 resultados para KT-invexity


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The population of space debris increased drastically during the last years. Collisions involving massive objects may produce large number of fragments leading to significantly growth of the space debris population. An effective remediation measure in order to stabilize the population in LEO, is therefore the removal of large, massive space debris. To remove these objects, not only precise orbits, but also more detailed information about their attitude states will be required. One important property of an object targeted for removal is its spin period and spin axis orientation. If we observe a rotating object, the observer sees different surface areas of the object which leads to changes in the measured intensity. Rotating objects will produce periodic brightness vari ations with frequencies which are related to the spin periods. Photometric monitoring is the real tool for remote diagnostics of the satellite rotation around its center of mass. This information is also useful, for example, in case of contingency. Moreover, it is also important to take into account the orientation of non-spherical body (e.g. space debris) in the numerical integration of its motion when a close approach with the another spacecr aft is predicted. We introduce the two databases of light curves: the AIUB data base, which contains about a thousand light curves of LEO, MEO and high-altitude debris objects (including a few functional objects) obtained over more than seven years, and the data base of the Astronomical Observatory of Odessa University (Ukraine), which contains the results of more than 10 years of photometric monitoring of functioning satellites and large space debris objects in low Earth orbit. AIUB used its 1m ZIMLAT telescope for all light curves. For tracking low-orbit satellites, the Astronomical Observatory of Odessa used the KT-50 telescope, which has an alt-azimuth mount and allows tracking objects moving at a high angular velocity. The diameter of the KT-50 main mirror is 0.5 m, and the focal length is 3 m. The Odessa's Atlas of light curves includes almost 5,5 thousand light curves for ~500 correlated objects from a time period of 2005-2014. The processing of light curves and the determination of the rotation period in the inertial frame is challenging. Extracted frequencies and reconstructed phases for some interesting targets, e.g. GLONASS satellites, for which also SLR data were available for confirmation, will be presented. The rotation of the Envisat satellite after its sudden failure will be analyzed. The deceleration of its rotation rate within 3 years is studied together with the attempt to determine the orientation of the rotation axis.

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Welsch (Projektbearbeiter): "Am 5. April 1849 wurden im Hafen von E.[ckernförde] das dänische Linienschiff 'Christian VIII.' und die Fregatte 'Gefion' von den deutschen Strandbatterien beschossen, wobei ersteres aufflog, letztere sich ergeben mußte" [Meyers Konv.-Lex., 6. Aufl.]

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Boberach: Schweizer Freiwillige aus einem Dorf zwischen Thurgau und Zürich haben am Kampf gegen die österreichische Herrschaft im Juni 1848 teilgenommen

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Boberach: Behandelt werden die Straßenkämpfe, die bei einem Sieg der Revolutionäre zur roten Republik geführt hätten, die Dislokation der Truppen und die Unterdrückung der revolutionären Bewegung in Meißen, Freiberg und Zwickau. - Welsch (Projektbearbeiter): Der Verfasser war während des Aufstandes Adjutant des Kommandierenden Generals

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Boberach: Behandelt sind die Februarrevolution in Paris, ihre unmittelbaren Folgen für die Nachbarstaaten, die Ereignisse in Berlin und Schleswig-Holstein, die deutsche Verfassungsfrage, Mai und Juni in Wien, Berlin und Paris, die Ereignisse in Deutschland in der zweiten Hälfte des Jahres 1848, die außerdeutschen Staaten (mit Ausnahme Frankreichs). - Welsch (Projektbearbeiter): Mit Erläuterungen zum einem Plan von Paris

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Boberach: Auf eine ausführliche historische Schilderung der Rechtsverhältnisse von Schleswig und Holstein folgt die Darstellung der Ereignisse in den Elbherzogtümern bis zum 12. April 1848

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Welsch (Projektbearbeiter): Herausgabe eines Teils der Aufzeichnungen des Kriegsministers und Oberbefehlshabers der badisch-pfälzischen Revolutionstruppen Sigel durch den sozialdemokratischen Reichstagsabgeordneten und späteren württembergischen Staatspräsidenten Blos. Nebst "einige[n] Darstellungen aus Sigel's Leben und Wirken in Nordamerika"

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Boberach: Der Rückzug der Truppen war militärisch nicht nötig, die Ausgangslage für eine Unterdrückung der revolutionären Bewegung günstig, aber Arnim und Bodelschwingh haben den König falsch beraten. - Welsch (Projektbearbeiter): Verfaßt vom preußischen Obersten K. G. Schulz im Auftrag des Generals v. Prittwitz [Hachtmann, R.: Berlin 1848; 1997, S. 54, Anm. 86]. Prittwitz war im März 1848 Kommandeur des Berliner Gardekorps und leitete den Kampf gegen die Berliner Aufständischen

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Boberach: Die Ereignisse werden unter dem Gesichtspunkt dargestellt, daß der Grundsatz der Volkssouveränität die Deutschen in Schleswig-Holstein berechtigt, die dänische Herrschaft abzulehnen und die Versuche der Dänisierung Ursache des Krieges waren

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Boberach: ... mit Karte der Halbinsel Eichhörnchensund in Südjütland. - Welsch (Projektbearbeiter): Zusammenstellung dreier militärischer Berichte: zwei über die Operationen der preußischen Armee in Schleswig (Juni 1848) und einer über den russischen Operationsplan im Defensivkrieg gegen das napoleonische Frankreich (1812)

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Boberach: Der Verlauf der ungarischen Erhebung [vom April bis Oktober 1849] wird dargestellt, ihre Berechtigung dokumentiert; es folgen die Lebensläufe der Verurteilten

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Background Protein-energy-malnutrition (PEM) is common in people with end stage kidney disease (ESKD) undergoing maintenance haemodialysis (MHD) and correlates strongly with mortality. To this day, there is no gold standard for detecting PEM in patients on MHD. Aim of Study The aim of this study was to evaluate if Nutritional Risk Screening 2002 (NRS-2002), handgrip strength measurement, mid-upper arm muscle area (MUAMA), triceps skin fold measurement (TSF), serum albumin, normalised protein catabolic rate (nPCR), Kt/V and eKt/V, dry body weight, body mass index (BMI), age and time since start on MHD are relevant for assessing PEM in patients on MHD. Methods The predictive value of the selected parameters on mortality and mortality or weight loss of more than 5% was assessed. Quantitative data analysis of the 12 parameters in the same patients on MHD in autumn 2009 (n = 64) and spring 2011 (n = 40) with paired statistical analysis and multivariate logistic regression analysis was performed. Results Paired data analysis showed significant reduction of dry body weight, BMI and nPCR. Kt/Vtot did not change, eKt/v and hand grip strength measurements were significantly higher in spring 2011. No changes were detected in TSF, serum albumin, NRS-2002 and MUAMA. Serum albumin was shown to be the only predictor of death and of the combined endpoint “death or weight loss of more than 5%”. Conclusion We now screen patients biannually for serum albumin, nPCR, Kt/V, handgrip measurement of the shunt-free arm, dry body weight, age and time since initiation of MHD.

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Peritoneal transport characteristics and residual renal function require regular control and subsequent adjustment of the peritoneal dialysis (PD) prescription. Prescription models shall facilitate the prediction of the outcome of such adaptations for a given patient. In the present study, the prescription model implemented in the PatientOnLine software was validated in patients requiring a prescription change. This multicenter, international prospective cohort study with the aim to validate a PD prescription model included patients treated with continuous ambulatory peritoneal dialysis. Patients were examined with the peritoneal function test (PFT) to determine the outcome of their current prescription and the necessity for a prescription change. For these patients, a new prescription was modeled using the PatientOnLine software (Fresenius Medical Care, Bad Homburg, Germany). Two to four weeks after implementation of the new PD regimen, a second PFT was performed. The validation of the prescription model included 54 patients. Predicted and measured peritoneal Kt/V were 1.52 ± 0.31 and 1.66 ± 0.35, and total (peritoneal + renal) Kt/V values were 1.96 ± 0.48 and 2.06 ± 0.44, respectively. Predicted and measured peritoneal creatinine clearances were 42.9 ± 8.6 and 43.0 ± 8.8 L/1.73 m2/week and total creatinine clearances were 65.3 ± 26.0 and 63.3 ± 21.8 L/1.73 m2/week, respectively. The analysis revealed a Pearson's correlation coefficient for peritoneal Kt/V of 0.911 and Lin's concordance coefficient of 0.829. The value of both coefficients was 0.853 for peritoneal creatinine clearance. Predicted and measured daily net ultrafiltration was 0.77 ± 0.49 and 1.16 ± 0.63 L/24 h, respectively. Pearson's correlation and Lin's concordance coefficient were 0.518 and 0.402, respectively. Predicted and measured peritoneal glucose absorption was 125.8 ± 38.8 and 79.9 ± 30.7 g/24 h, respectively, and Pearson's correlation and Lin's concordance coefficient were 0.914 and 0.477, respectively. With good predictability of peritoneal Kt/V and creatinine clearance, the present model provides support for individual dialysis prescription in clinical practice. Peritoneal glucose absorption and ultrafiltration are less predictable and are likely to be influenced by additional clinical factors to be taken into consideration.

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Welsch (Projektbearbeiter): Eingabe des Abgeordneten Semrau (Kreis Schlochau, Westpreußen) bezüglich der Trassierung der projektierten Eisenbahnlinie Berlin - Königsberg (Pr.): Favorisierung der Linie B (Küstrin - Woldenberg - Deutsch-Krone - Jastrow - Konitz - Preußisch-Stargardt - Dirschau) gegenüber der Linie A (Küstrin - Schneidemühl - Bromberg - Dirschau) aus finanziellen, ökonomischen und militärstrategischen Gründen