bluuebunny/crossref_metadata_2025_split huggingface dataset:
Serial multiplexing of optical fibers for sensing of structural strains
Authors: Chen Z. , Li Q. , Ansari F. , Mendez A. 
Published: April 2007

AbstractCondition Monitoring of civil structures is best accomplished by way of distributed sensors. Sensors capable of making distributed measurements allow for monitoring the entire structure. Optical fiber sensors are especially very attractive for this purpose, since they are geometrically versatile and they can be readily integrated within various types of structures and materials. The research presented here describes the development of a new optical fiber sensor system for measurement of structural strains based on white light interferometry. Individual sensors are linked in series and an optical switch provides for multiplexing of strain signals from various locations in the structure. Bragg grating type fiber optic sensors as well as strain gauges were employed for comparison and verification of strain signals as measured by the new system. The system provides capability for distributed sensing of strains in large structures.
Limiting control possibilities of multi‐mass flexible structures
Authors: Balandin D. 
Published: April 2007

AbstractThe limiting control possibilities of multi‐mass flexible systems subjected to disturbances from a certain class are studied. A general method of estimating these possibilities is suggested. This method is discussed for the systems described by the ordinary differential equations. The relationship between estimating limiting control possibilities and calculating optimal control with respect to a criterion of minimal guaranteed result is discussed. The mathematical models presented in this paper can be applied to a wide class of actual flexible systems, in particular, to buildings and structures under seismic or wind loads.
Nonlinear analysis of stochastic stability problems
Authors: Griesbaum R. , Wedig W. 
Published: April 2007

AbstractFor stability investigations of elastic structures subjected to parametric excitations by white noise we follow Khas'minskii's concept introducing projections on unit hyperspheres which separate all stationary solutions of the linear systems from their instationary part. The projection processes are investigated by Monte‐Carlo simulations and by Fourier expansions of the associated Fokker‐Planck equations in order to obtain the invariant measures of the systems and corresponding top Lyapunov exponents.
Numerical methods for the control of flexible structures extended abstract of briffaut's thesis
Authors: Bourquin F. 
Published: April 2007

AbstractThis paper is an extended abstract of the thesis of J.‐S. Briffaut. It treats the active control of flexible structures. In the first part the design of open‐loop control laws for beams is considered. In the second the implementation of Komornik's full state feed‐back law. In the third and fourth numerical results for the control of frames made of beams under bending and traction‐compression.
Active control in civil engineering: From conception to full scale applications
Authors: Aupérin M. , Dumoulin C. , Magonette G. E. , Marazzi F. , Försterling H. , Bonefeld R. , Hooper A. , Jenner A. G. 
Published: April 2007

AbstractAn active tendon control system for civil engineering cable‐supported structures is proposed. The technique is based on a tendon actuator collocated with a force sensor. A large‐scale mock‐up using industrial components has been built and widely tested. The test‐bed is a model of cable‐stayed bridge during its construction phase, equipped with hydraulic actuators on the two longest stay‐cables. The results of several damping experiences are presented; they clearly demonstrate the efficiency of the active damping system. The proposed technology is directly applicable to real structures by scaling up the devices.
Asymptotics of forced vibrations of bases, foundations and seismoisolators
Authors: Aghalovyan L. A. , Gevorgyan R. S. , Sahakyan A. V. , Aghalovyan M. L. 
Published: April 2007

AbstractVibrations of plate‐like bases, foundations and seismoisolators caused, in particular, by seismic loading are studied. Asymptotic solutions of relevant dynamic equations of elasticity theory are constructed. Resonance conditions are derived, ways to avoid hazardous resonances are discussed.
Seismic control of regular and irregular buildings using viscoelastic passive dampers
Authors: Sophocleous A. A. 
Published: April 2007

AbstractThis paper illustrates the vibration control effectiveness of passive viscoelastic dampers for regular or irregular structures. Its optimum installation location is determined from the controlled mode shape values and the optimal system parameters of the viscoelastic passive dampers are evaluated by minimizing the modal displacement response and maximizing the damping energy dissipation capacity between the structure with and the structure without the dampers. The analytical results of the parametric investigation show that the seismic response of regular or irregular structures are greatly improved by using viscoelastic dampers, leading to an alternative method of strengthening compared to the traditional rehabilitation techniques.
A PET study of effects of chronic 3,4‐methylenedioxymethamphetamine (MDMA, “ecstasy”) on serotonin markers in Göttingen minipig brain
Authors: Cumming Paul , Møller Mette , Benda Kjeld , Minuzzi Luciano , Jakobsen Steen , Jensen Svend B. , Pakkenberg Bente , Stark Anette K. , Gramsbergen Jan Bert , Andreasen Mette F. , Olsen Aage K. 
Published: April 2007

AbstractThe psychostimulant 3,4‐methylendioxymethamphetamine (MDMA, “ecstasy”) evokes degeneration of telencephalic serotonin innervations in rodents, nonhuman primates, and human recreational drug users. However, there has been no alternative to nonhuman primates for studies of the cognitive and neurochemical consequences of serotonin depletion in a large‐bodied animal. Therefore, we used positron emission tomography (PET) with [11C]DASB to map the distribution of plasma membrane serotonin transporters in brain of Göttingen minipigs, first in a baseline condition, and again at 2 weeks after treatment with MDMA (i.m.), administered at a range of doses. In parallel PET studies, [11C]WAY‐100635 was used to map the distribution of serotonin 5HT1A receptors. The acute MDMA treatment in awake pigs evoked 1°C of hyperthermia. MDMA at total doses greater than 20 mg/kg administered over 2–4 days reduced the binding potential (pB) of [11C]DASB for serotonin transporters in porcine brain. A mean total dose of 42 mg/kg MDMA in four animals evoked a mean 32% decrease in [11C]DASB pB in mesencephalon and diencephalon, and a mean 53% decrease in telencephalic structures. However, this depletion of serotonin innervations was not associated with consistent alterations in the binding of [11C]WAY‐100635 to serotonin 5HT1A receptors. Stereological cell counting of serotonin‐positive neurons, which numbered 95,000 in the dorsal raphé nucleus of normal animals, was unaffected in MDMA‐treated group. group. Synapse 61:478–487, 2007. © 2007 Wiley‐Liss, Inc.
Transforming the Acquisition Enterprise: A Framework for Analysis and a Case Study of Ship Acquisition
Authors: Pennock Michael J. , Rouse William B. , Kollar Diane L. 
Published: April 2007

AbstractThe acquisition of public sector complex systems is time‐consuming, very expensive, and rife with uncertainties. The enterprise associated with acquisition is an excellent candidate for transformation— fundamental change to achieve substantially higher levels of value. This paper argues that choosing among alternative transformation initiatives should be based on an enterprise‐wide perspective as well as systematic economic valuation of the alternative investments. An options‐based methodology for assessing the economic value of alternative initiatives is presented and illustrated in the context of military ship building. © 2007 Wiley Periodicals, Inc. Syst Eng 10: 99– 117, 2007
Young Hong Kong managers: Their doubts about 1997
Authors: Caldwell James L. , Moser Ernest R. 
Published: April 2007

AbstractThe economic success of Hong Kong—especially when compared to its much larger neighbor the People's Republic of China—has been a source of worry among business leaders in light of the colony's planned reversion back to China in 1997. Young managers in particular are nervous that, under the bureaucratic and repressive dominion of China, economic growth and opportunities will dwindle. How China handles its own affairs, as well as those of Hong Kong, may well affect the region's economy well into the next century.
The Bulgarian executive: Promoter or obstacle to the economy?
Authors: Puchev Plamen 
Published: April 2007

AbstractHow well are Bulgarian managers adapting to the advent of market economy in the former socialist state? Part of the difficulty lies in a lack of practical business knowledge on the part of managers. Also, many executives are reluctant to give up a system that they know. Ultimately, the future of economic reform in Bulgaria will hinge on how willing managers are to integrate change.
Europe 1992: Regionalism and globalism
Authors: Miller William F. 
Published: April 2007

AbstractThe changes that Europe has seen in the past few years—the growing reality of a unified EC, the reforms in Eastern Europe and the Soviet Union, and the results of economic and political events from outside—have opened up new opportunities and created new challenges. Perhaps the most important result of “Europe '92” will be its ability to spur on a new era of innovation and entrepreneurship whose effects will be felt around the globe.
The use of R&D consortia as market barriers: Case studies of consortia in the United States, Japan, and Western Europe
Authors: Hart Jeffrey A. 
Published: April 2007

AbstractThere are strong temptations to use research and development (R&D) consortia as barriers to trade and investment. The cases discussed here, the VLSI Project in Japan, Sematech in the United States, the Joint European Submicron Silicon Initiative (JESSI), the European Eureka EU95 program, the European Vision 1250 program, and NHK Engineering Services in Japan are all in the field of high technology electronics. Electronics has been made a priority for public research and development efforts because the governments of advanced industrial countries believe that competitiveness in high technology electronics is important for both national security and overall economic competitiveness. R&D consortia are used by governments and the European Community to pool the risks of the development of new technologies. Access to full membership in these R&D consortia in all three regions is limited, as a rule, to firms owned and headquartered in the region. Access to the technology created is limited in a variety of ways, the most important of which is the inability to work with the technologies themselves at an early stage, which is a major disadvantage in high technology industries. © 1993 John Wiley & Sons, Inc.
Impact of system culture on West and East German Managers: A new topic of intercultural management research
Authors: Autenrieth Christine 
Published: April 2007

AbstractThe transformation from socialism to capitalism and from a socialist planned economy to a social market economy in the new Federal States of the Federal Republic of Germany confronts the affected people with a new life and working world. On the level of the enterprises, it is especially human resource management that is faced with integrating the different preceding experience, qualifications, and cultural values of their managers from the new Federal States into the company. In order to carry out this task adequately, human resource management needs an appropriate detailed analysis. Intercultural management research offers a suitable framework, as it is familiar with management in the context of different cultures and societies. © 1993 John Wiley & Sons, Inc.
Technology transfer in Mexico: Past patterns and new problems related to the North American free trade agreement
Authors: Pfaff John F. , Sordo Juan Garcia , Schwarz Theodore , Trevino Salvador , Sepulveda Cesar J. M. , Dominquez Carlos G. Villarreal 
Published: April 2007

AbstractAs the Mexican economy prepares to transition from a relatively closed and protected market to a regionally integrated free market which is part of the proposed North American Free Trade Agreement (NAFTA), a change in its technology licensing environment will be needed to enable Mexican companies to compete for technology with firms from the other member countries of the NAFTA. This study identifies the national sources which have provided Mexico with technology and the Mexican industrial sectors which have been able to attract this technology in the 1980s. It further evaluates the current licensing environments in Canada, Mexico, and the U.S.A. as well as in the Latin American Integration Association (LAIA). The study provides recommendations for changes to the Mexican licensing environment and proposes strategies for attracting technology to Mexican industry under the changed conditions which would be introduced by the NAFTA. © 1993 John Wiley & Sons, Inc.
Assessment of reproductive behavior and hormonal cycles in geriatric western Lowland gorillas
Authors: Margulis Susan W. , Atsalis Sylvia , Bellem Astrid , Wielebnowski Nadja 
Published: April 2007

AbstractThe population of western lowland gorillas in North American zoos is aging and, as is the case with the aging human population, may have unique physical and social needs. We have documented previously that 25% of aging females (5/22) ceased to show reproductive cycles entirely, and could be defined as menopausal. Approximately 32% of females showed somewhat irregular cycling patterns. We review our hormonal and behavioral findings on reproductive aging in gorillas; describe the range of cycling patterns that we see and how we interpret these; and discuss the implications of these findings for captive management and husbandry of aging gorillas. We monitored fecal hormone metabolites (progestogens) in 30 gorillas and collected simultaneous behavioral data to evaluate the relationship between cyclicity and sexual behavior. We identified and described several discrete patterns of irregular cycling. These included extreme variability of cycle length, cyclic patterns with unusually low progestogen peak concentrations that possibly may not support luteal activity, and large variability in maximum progestogen peak height among cycles. All of these changes are consistent with age‐related hormonal changes observed in humans and may be signs of changes in fertility as well. Behaviorally, nearly all cycling females exhibited signs of estrus. Affiliative behavior between male silverbacks and estrous females was observed in the control females, but not the geriatric females. These findings suggest that pre‐menopausal females are exhibiting signs of perimenopause. As is the case in humans, such changes in hormone patterns may occur years before the onset of menopause. As enhancements in nutrition, husbandry, and veterinary medicine have led to increased longevity in our zoo populations of apes, it has become imperative that we investigate and better understand associated physiological and behavioral changes in geriatric animals to ensure appropriate management of this increasing demographic sub‐population. Zoo Biol 0:1–23, 2007. © 2007 Wiley‐Liss, Inc.
Semen collection and evaluation in free‐ranging Brazilian rattlesnakes (Crotalus durissus terrificus)
Authors: Zacariotti Rogério Loesch , Grego Kathleen Fernandes , Fernandes Wilson , Sant'Anna Sávio Stefanini , de Barros Vaz Guimarães Marcelo Alcindo 
Published: April 2007

AbstractTwo hundred‐ninety species of reptiles are estimated to need urgent action for conservation, with at least 113 threatened species worldwide. The International Union for Conservation of Nature and Natural Resources (IUCN) Red List of Threatened Species includes 80 species of snakes, with six native Brazilian species, a number likely to be an underestimation. Some authors believe that assisted reproduction would be an important tool to improve reproduction in captivity of some reptiles. An efficient technique for semen collection and evaluation is an important step in development of protocols for cryopreservation of semen or artificial insemination in snakes, contributing to the conservation of endangered species. Although these techniques are important, some basic semen parameters are described for four of the ∼2,900 snake species in the world. The Brazilian rattlesnake (Crotalus durissus terrificus) was chosen as a model for semen collection in snakes because it is found quite often in Sao Paulo State. Semen was collected once from each animal by the same investigator during the mating season of this species in Brazil. After antiseptic cleansing of the skin around the cloaca, the snakes were injected subcutaneously with a dose of 15 mg/kg of 1% solution of lidocaine around the cloaca. Semen was collected with ventral massages after cloacal relaxation and directly from genital papilla inside the cloaca. A total of 28 ejaculates from 39 animals were obtained, representing collection efficiency of 71.80%. Semen volume and concentration in Brazilian rattlesnakes ranged from 3–70 µl and from 0.94–2.23 × 109 spermatozoa/ml, respectively. Zoo Biol 0:1–6, 2007. © 2007 Wiley‐Liss, Inc.
Specification and verification challenges for sequential object-oriented programs
Authors: Leavens Gary T. , Leino K. Rustan M. , Müller Peter 
Published: April 2007

Abstract
The state of knowledge in how to specify sequential programs in object-oriented languages such as Java and C# and the state of the art in automated verification tools for such programs have made measurable progress in the last several years. This paper describes several remaining challenges and approaches to their solution.
Geographic patterns in the distribution of Palearctic songbirds
Authors: Roselaar Cees S. , Sluys Ronald , Aliabadian Mansour , Mekenkamp Peter G. M. 
Published: April 2007

AbstractA database was created of digitized equal area distribution maps of 3,036 phylogenetic species of Palearctic songbirds. Biogeographic patterns are reported for two data sets: (1) including all passeriform bird species reported as breeding within the boundaries of our study map, (2) passeriform species restricted in their distribution to our study region, thus excluding the partly extra-limital taxa. With respect to the data set excluding partly extra-limital taxa, the average range size is 238 grid cells (grid cell area: 4,062 km2). Analysis of the geographic distribution of species richness for the full data set showed several hotspot regions, mostly located in mountainous areas. The index of range-size rarity identified similar hotspot regions as that for species richness, albeit that the range-size rarity de-emphasized the central Siberian hotspot. Range-size rarity hotspots that are not evident on the measure of species richness concern a great number of islands. Much more prominent on the index of range-size rarity are the Atlas Mountains of northern Africa, the Jabal al Akhdar region in NE Libya, and the eastern border of the Mediterranean. Restricting the analysis of geographic variation to the 25% of the species with smallest ranges resulted in a greatly simplified pattern of hotspots.
Cellular cardiomyoplasty in large myocardial infarction: Can the beneficial effect be enhanced by ACE‐inhibitor therapy?
Authors: Olivares Emerson L. , Costa‐e‐Sousa Ricardo H. , Werneck‐de‐Castro João P.S. , Pinho‐Ribeiro Vanessa , Silva Márcia G. , Ribeiro Karla C. , Mattos Elisabete C. , Goldenberg Regina C.S. , de Carvalho Antonio C. Campos , Masuda Masako Oya 
Published: March 2007

AbstractBackground:Cellular cardiomyoplasty with bone marrow derived stromal (MSC) and mononuclear (BMNC) cells has been shown to improve performance of infarcted hearts. We performed a comparative study with MSC and BMNC and tested the hypothesis that captopril treatment could enhance the beneficial effect of cell therapy in large myocardial infarctions.MethodsMale syngeneic Wistar rats underwent experimental infarction and were randomized to receive 1–3×106 MSC, 108 BMNC or vehicle (BSS group). Two additional groups were treated with captopril and received 1–3×106 MSC (Cap.MSC) or vehicle (Cap).Results:The ejection fraction (EF%) of MSC and BMNC‐treated rats was higher than in the BSS rats, eight weeks after transplantation (33.0±4.0, 34.0±2.0 and 20.0±2.0% respectively, P<0.01). Both captopril‐treated groups improved EF% similarly. But only captopril plus MSC treatment almost restored cardiac function to control levels, 8 weeks after injection (60.50±5.40% vs. 41.00±4.50% in Cap.MSC and Cap respectively, P<0.05). Many DAPI‐labelled cells were found in the scar tissue of the left ventricle only in the Cap.MSC group.Conclusions:Cell transplantation with both MSC and BMNC produced a similar stabilisation of heart function, but the success of the cell engraftment and the recovery of cardiac performance were dependent on concomitant treatment with captopril.
Endoscopic repair of anterior table: Frontal sinus fractures with a medpor implant
Authors: Kim Kenneth K. , Mueller Reid , Huang Faye , Strong Bradley E. 
Published: April 2007

ObjectivesIsolated anterior table frontal sinus fractures are commonly repaired through a coronal incision. Endoscopic repair of these injuries has recently been described. This study evaluates the endoscopic repair of isolated anterior table frontal sinus fractures with a Medpor implant.MethodsPreinjury photographs of 10 cadaveric heads were obtained. Anterior table frontal sinus fractures were generated in all cadavers. The fractures were documented with postinjury computerized tomography (CT) scans. The fractures were then endoscopically repaired with a Medpor implant. Five cadavers received prefabricated implants generated from the post injury CT data. Five cadavers received a standard implant (0.85 mm sheet) contoured intraoperatively. The success of each repair was documented with post repair CT scans, photographs, and direct transcutaneous visualization.ResultsAll 10 defects were successfully repaired within 1 to 2 mm. All implants were palpable, but no objective asymmetry could be appreciated photographically or on CT scan.ConclusionAnterior table frontal sinus fractures can be endoscopically repaired with either a standard 0.85 mm sheet or a prefabricated implant. Clinical application of this technique would be expected to reduce operating time, surgical morbidity, and cost.
Organizing hematoma of the maxillary sinus
Authors: Song Hyung Min , Jang Yong Ju , Chung Yoo‐Sam , Lee Bong‐Jae 
Published: April 2007

ObjectiveThe study aims to elucidate the clinical features and surgical results of OHMS (organizing hematoma of the maxillary sinus).Study Design and SettingWe performed a chart review of 20 patients undergoing surgery for maxillary sinus lesions and pathologically diagnosed with OHMS between January 1990 and December 2005.ResultsThe most common complaint was frequent epistaxis (70%). Paranasal CT scans showed unilateral expansile maxillary opacification, heterogeneous enhancement, bony destruction (25%), and focal calcification (15%). Treatment consisted of a sublabial approach combined with endonasal endoscopic surgery (50%), endonasal endoscopic surgery alone (45%), and Denker's operation (5%). All patients had a successful outcome without recurrence.ConclusionConservative surgical approaches such as sublabial or endonasal endoscopic surgery alone or in combination lead to excellent outcomes without recurrence. We propose the term “OHMS” to better describe this rare pathology.SignificanceOur report is the largest series of OHMS to date.