Fundamental limit to Qubit Control with Coherent Field

The ultimate accuracy as regards controlling a qubit with a coherent field is studied in terms of degradation of the fidelity by employing a fully quantum mechanical treatment. While the fidelity error accompanied by pi/2 pulse control is shown to be inversely proportional to the average photon number in a way similar to that revealed by the Gea-Banacloche's results. Our results show that the error depends strongly on the initial state of the qubit. When the initial state of the qubit is in the ground state, the error is about 20 times smaller than that of the control started from the exited state, no matter how large N is. This dependency is explained in the context of an exact quantum mechanical description of the pulse area theorem. By using the result, the error accumulation tendency of successive pulse controls is found to be both non-linear and initial state-dependent.Comment: 9 pages, 3 figures, to appear in PR

Construction and test of flexible walls for the throat of the ILR high-speed wind tunnel

Aerodynamic tests in wind tunnels are jeopardized by the lateral limitations of the throat. This influence expands with increasing size of the model in proportion to the cross-section of the throat. Wall interference of this type can be avoided by giving the wall the form of a stream surface that would be identical to the one observed during free flight. To solve this problem, flexible walls that can adapt to every contour of surface flow are needed

SIMILARITY MEASUREMENT OF ECONOMIC TRENDS IN CENTRAL EUROPE: BUSINESS CYCLES’ CORRELATION OF GERMANY, HUNGARY, THE CZECH REPUBLIC AND CROATIA

Autori su u radu određivali relaciju Hrvatske prema njemačkom gospodarstvu i učinili usporedbu sa dvjema naprednijim tranzicijskim zemljama u razdoblju 1992.-1999. Usporedba gospodarstva provedena je usporedbom poslovnih ciklusa predočenih ciklusom nezaposlenosti u Njemačkoj, Mađarskoj, Češkoj i Hrvatskoj. Tom svojom analizom pokazali su da postoji uska povezanost cikličkoga kretanja nezaposlenosti u sve tri zemlje s cikličkim kretanjima nezaposlenosti u Njemačkoj. Najvažniji domet tih istraživanja jest to što je već poznatim rezultatima o uskoj povezanosti cikličkih kretanja u Srednjoj Europi sada pridodan i nalaz za Hrvatsku.Following the researches done by Laurence Boone and Mathilde Maurel (1998, 1999) about monetary union of Central European countries with Germany or European Union, the research curiosity directed us to discovery of connections of Croatian and German economy, and the average of the European Union. Boone and Maurel (1999) concluded that the benefit of common monetary policy of transitional countries exceeds the costs. The paper determines only relation of Croatia towards German economy and it is made a comparison with two more progressive transitional countries. Comparison of economy has been carried out by comparison of business cycles, illustrated by unemployment cycle in observed countries. By using the Hodrick-Prescott filter in order to remove trend-components from the time series of unemployment in Germany, Hungary, the Czech Republic and Croatia, the authors proved close correlation of cyclical unemployment movement in all three countries with the cyclical unemployment movement in Germany. Besides, they suggested the similarity of reactions of business cycle in three observed transitional countries during 24 months after initial shock which had originated from German economy, and even larger similarity in reaction to shock during the first 12 months. The authors are careful because the results lead to conclusion that the observed countries in Mundell’s sense are optimal currency area. They point out the possibilty that cyclical coordination is endogenous, i.e. that it is a consequence of implicit or explicit exchange rate pegging of more progressive transitional countries to exchange rate of German mark during the most of period comprised by analysis (1992-1999). However the paper does not deny the importance of results about cyclical coordination for consideration of optimal currency regime. It is pointedout that the most important in research is the fact that to the already known results about close correlation of cyclical movements in Central Europe is added now the report for Croatia which shows close cyclical correlation of unemployment with Germany

Distal radius fracture after proximal row carpectomy

AbstractIntroductionWe encountered a patient with distal radius fracture (DRF) after proximal row carpectomy (PRC). The mechanism of the DRF after PRC is discussed in this report.Presentation of caseThe patient was a 73-year-old female who had undergone PRC due to Kienböck disease before. The wrist range of motion was: 45° on dorsiflexion and 20° on flexion. DRF has occurred at 3 years after PRC. The fracture type was extra-articular fracture. Osteosynthesis was performed using a volar locking plate. No postoperative complication developed, the Mayo score was excellent at 6 months after surgery, and the daily living activity level recovered to that before injury.DiscussionSince the wrist range of motion decreased and the lunate fitted into the joint surface after PRC, making the forearm join with the hand like a single structure, pressure may have been loaded on the weak distal end of the radius from the dorsal side, causing volar displacement and fracture.ConclusionThe pressure distribution and range of motion of the radiocarpal joint after PRC are different from those of a normal joint, and the mechanism of fracture also changes due to PRC

カシノナガキクイムシの移動と分布に影響を及ぼす要因の解明

取得学位：博士(理学)，学位授与番号：博甲第801号，学位授与年月日：平成18年3月22日,学位授与年：200

4.EAFES International Congress in Mokpo, Korea

Institute of Geograpical Sciences and Natural Resources Research, CASProject Number 14404021, Peport of Research Project ; Grant-in-Aid for Scientific Research(B)(2), from April 2002 to March 2006, Edited by Muramoto,Ken-ichiroKamata, NaotoKawanishi, TakuyaKubo, MamoruLiu, JiyuanLee, Kyu-Sung , 人工衛星データ活用のための東アジアの植生調査、課題番号14404021, 平成14年度～平成17年度科学研究費補助金, 基盤研究（B)(2)研究成果報告書, 研究代表者：村本, 健一郎, 金沢大学自然科学研究科教

4.EAFES International Congress in Mokpo, Korea

石川国立工業高等専門学校Northeastern Research Station, USDA Forest ServiceIshikawa Forest Experoment Station金沢大学大学院自然科学研究科Project Number 14404021, Peport of Research Project ; Grant-in-Aid for Scientific Research(B)(2), from April 2002 to March 2006, Edited by Muramoto,Ken-ichiroKamata, NaotoKawanishi, TakuyaKubo, MamoruLiu, JiyuanLee, Kyu-Sung , 人工衛星データ活用のための東アジアの植生調査、課題番号14404021, 平成14年度～平成17年度科学研究費補助金, 基盤研究（B)(2)研究成果報告書, 研究代表者：村本, 健一郎, 金沢大学自然科学研究科教