Синусоїдальні зубчасті передачі як альтернатива традиційним передачам та новий метод їх виготовлення

Дана характеристика синусоидальных зубчатых колес и передач, особенности их построения и преимущества по сравнению с традиционными передачами. Описан новый универсальный высокоэффективный способ нарезания синусоидальных профилей, обеспечивающий изготовление большинства известных типов зубчатых колес одним инструментом на одном станке.The sine type gears and transmissions takes many advantages in the comparison with the standard transmissions. The new universal high-efficiency method of sine curve cogs cutting, providing makes the most known types of gear-wheels by one instrument on one machine-tool , is described

Mass Measurements and the Bound--Electron g Factor

The accurate determination of atomic masses and the high-precision measurement of the bound-electron g factor are prerequisites for the determination of the electron mass, which is one of the fundamental constants of nature. In the 2002 CODATA adjustment [P. J. Mohr and B. N. Taylor, Rev. Mod. Phys. 77, 1 (2005)], the values of the electron mass and the electron-proton mass ratio are mainly based on g factor measurements in combination with atomic mass measurements. In this paper, we briefly discuss the prospects for obtaining other fundamental information from bound-electron g factor measurements, we present some details of a recent investigation of two-loop binding corrections to the g factor, and we also investigate the radiative corrections in the limit of highly excited Rydberg S states with a long lifetime, where the g factor might be explored using a double resonance experiment.Comment: 13 pages, LaTeX; dedicated to Prof. H.-J. Kluge on the occasion of his 65th birthday, to appear in Int. J. Mass. Spectrometr

Spectacular Role of Electron Correlation in the Hyperfine Interactions in 2D5/2^2D_{5/2} States in Alkaline Earth Ions

The low-lying n(=3,4,5)d $^2D_{5/2}$ states alkaline earth ions are of vital importance in a number of different physical applications. The hyperfine structure constants of these states are characterized by unusually strong electron correlation effects. Relativistic coupled-cluster theory has been employed to carry out {\it ab initio} calculations of these constants. The role of the all order core-polarization effects was found to be decisive in obtaining good agreement of the results of our calculations with accurate measurements. The present work is an apt demonstration of the power of the coupled-cluster method to cope with strongly interacting configurations.Comment: Submitted to Physical Review Letters, 3 figures and 5 table

Evaluation of the index of biotic integrity and its use describing the fisheries community in Bell Creek, Delaware County IN : an honors thesis (HONRS 499)

The objective of this study was to compare Index of Biotic Integrity (IBI) with Qualitative Habitat Evaluation Index (QHEI) scores of Bell Creek, Delaware and Henry IN counties. Twelve sites were chosen spaced approximately evenly along Bell Creek from the mouth upstream to the headwaters. At each site, we evaluated the aquatic habitat using standard QHEI methodology. Collecting fish samples followed IBI protocol and used a backpack electrofishing unit. IBI scores were lowest at the most upstream station, while scores downstream (>3.6 mi2) appeared due more to changes in other aspects of the habitat, as defined by the QHEI score for that particular site. Thus, lower IBI scores in our sample may be due to low QHEI scores calculated at sites that had previously been channelized or influenced by other anthropogenic events. This suggests that habitat has a greater influence on IBI scores than drainage area and current IBI methodology may need to be reevaluated based upon habitat classification.Honors CollegeThesis (B.?.

Отказоустойчивый вентильный электро-привод для гибридного транспортного средства

Выпускная квалификационная работа содержит 79 страниц, 10 рисунка, 30 таблиц, 24 источников. Ключевые слова: гибридное транспортное средство, отказоустойчивый вентильный электропривод, математическая модель вентильного двигателя, неполнофазный режим работы, обрыв фазы двигателя, отказ ключа преобразователя частоты. Был проведён обзор аккумуляторов, обоснован выбор ёмкости аккумуляторной батареи. Цель работы – разработка отказоустойчивого вентильного электропривода для гибридного транспортного средства, обеспечение алгоритма восстановления работоспособности. Выпускная квалификационная работа выполнена в текстовом редакторе Microsoft Office Word 2010 с использованием пакетов: Microsoft Visio 2010, Matlab Simulink.Final qualifying work consists of 79 pages, 10 figure, 30 tables, 24 sources. Key words: hybrid vehicle, failover the valve actuator, the mathematical model of the brushless DC motor, open-phase mode, output phase loss, failure of a key of the frequency Converter. A review was undertaken of batteries and justifies the choice of battery capacity. The work purpose – development of fault-tolerant brushless drive for a hybrid vehicle, provision of algorithm restore functionality. Final qualifying work is executed in a text editor Microsoft Office Word 2010 packages: Microsoft Visio 2010, Matlab Simulink

Activity patterns of nesting Mexican spotted owls

We collected 2,665 hr of behavioral information using video surveillance on 19 Mexican Spotted Owl (Strix occidentalis lucida) pairs between 25 April and 26 July 1996, Prey deliveries per day increased as the nesting season progressed, with an average of 2.68 prey deliveries during incubation, 4.10 items during brooding, and 4.51 items during the nestling phase. The highest delivery rates were concentrated between 1-3 hours before sunrise (02:00-05:00) and 1-3 hours after sunset(18:00-21:00). Trip duration during diurnal hours increased 14 fold from incubation through the nestling phase, compared with a 7.2 fold increase during nocturnal hours. Nest bout duration decreased during both diurnal (36%) and nocturnal hours (76%) across the nesting season. Nest attentiveness decreased as the nesting season progressed, from 97% during the incubation phase to 47% during the nestling phase. Owls attended nests at higher rates during diurnal hours than nocturnal hours across all nesting phases. Activity patterns of Mexican Spotted Owls showed marked cyclical changes in response to ecological factors. Fluctuations in nesting behavior were related to changes in nesting phase and time of day

Conditions of the Development of Logistic Centers in Poland in the Context of European States Experiences

The article is, for the most part, the aftermath of his own examinations carried out in years 2007-2010 and concerning logistic centers development conditioning.Artykuł jest w znacznej mierze pokłosiem badań własnych autora przeprowadzonych w latach: 2007-2010 dotyczących uwarunkowań rozwoju centrów logistycznych

The Evolution of Central Volcanoes in Ultraslow Rift Systems : Constraints From D. Joao de Castro Seamount, Azores

The Dom Joao de Castro seamount in the Hirondelle Basin (Azores) is a central volcano on the ultraslow diverging Terceira Rift axis. The combination of structural and geochemical data provides insights into the evolution of central volcanoes in oceanic rift systems above the Azores melting anomaly. The orientation of fault scarps and volcanic structures at D. Joao de Castro and the adjacent Castro fissure zone indicate that the regional SW-NE extending stress field dominates the morphology of the NW Hirondelle Basin. The regional tectonic stress field controls the crustal melt pathways and leads to dike emplacement along fissure zones and the prevalent eruption of mafic lavas. The occurrence of mafic to felsic lavas at D. Joao de Castro gives evidence for both a deep and a shallow crustal melt reservoir generating a subordinate local stress field at the seamount. New Sr-Nd-Pb isotope data along with incompatible trace element ratios indicate that D. Joao de Castro and the Castro Ridges originated from similarly heterogeneous mantle source but did not form simultaneously. Our new model implies that central volcanoes along the Terceira Rift form by the growth of volcanic ridges and transitioned into circular edifices after magmatic systems generate local changes in the regional lithospheric stress field. The geometry of D. Joao de Castro and other magmatic systems along the Terceira Rift combined with the alkaline nature of the erupted lavas, and the large lithosphere thickness indicates that young oceanic rifts are more similar to continental rifts rather than mid-ocean ridges.Peer reviewe

Calculated Electron Fluxes at Airplane Altitudes

A precision measurement of atmospheric electron fluxes has been performed on a Japanese commercial airliner (Enomoto, {\it et al.}, 1991). We have performed a monte carlo calculation of the cosmic ray secondary electron fluxes expected in this experiment. The monte carlo uses the hadronic portion of our neutrino flux cascade program combined with the electromagnetic cascade portion of the CERN library program GEANT. Our results give good agreement with the data, provided we boost the overall normalization of the primary cosmic ray flux by 12\% over the normalization used in the neutrino flux calculation.Comment: in REVTEX, 12 pages + 4 figures available upon reques

Recoil correction to the ground state energy of hydrogenlike atoms

The recoil correction to the ground state energy of hydrogenlike atoms is calculated to all orders in \alpha Z in the range Z = 1-110. The nuclear size corrections to the recoil effect are partially taken into account. In the case of hydrogen, the relativistic recoil correction beyond the Salpeter contribution and the nonrelativistic nuclear size correction to the recoil effect, amounts to -7.2(2) kHz. The total recoil correction to the ground state energy in hydrogenlike uranium (^{238}U^{91+}) constitutes 0.46 eV.Comment: 16 pages, 1 figure (eps), Latex, submitted to Phys.Rev.