bluuebunny/crossref_metadata_2025_split huggingface dataset:
Topographic signatures and a general transport law for deep‐seated landslides in a landscape evolution model
Authors: Booth Adam M. , Roering Josh J. , Rempel Alan W. 
Published: February 2013

AbstractA fundamental goal of studying earth surface processes is to disentangle the complex web of interactions among baselevel, tectonics, climate, and rock properties that generate characteristic landforms. Mechanistic geomorphic transport laws can quantitatively address this goal, but no widely accepted law for landslides exists. Here we propose a transport law for deep‐seated landslides in weathered bedrock and demonstrate its utility using a two‐dimensional numerical landscape evolution model informed by study areas in the Waipaoa catchment, New Zealand, and the Eel River catchment, California. We define a non‐dimensional landslide number, which is the ratio of the horizontal landslide flux to the vertical tectonic flux, that characterizes three distinct landscape types. One is dominated by stochastic landsliding, whereby discrete landslide events episodically erode material at rates exceeding the long‐term uplift rate. Another is characterized by steady landsliding, in which the landslide flux at any location remains constant through time and is greatest at the steepest locations in the catchment. The third is not significantly affected by landsliding. In both the “stochastic landsliding” and “steady landsliding” regimes, increases in the non‐dimensional landslide number systematically reduce catchment relief and widen valley spacing, producing long, low angle hillslopes despite high uplift rates. The stochastic landsliding regime captures the frequent observation that deep‐seated landslides produce large sediment fluxes from small areal extents while being active only a fraction of the time. We suggest that this model is adaptable to a wide range of geologic settings and is useful for interpreting climate‐driven changes in landslide behavior.
Survey of academic pediatric hospitalist programs in the US: Organizational, administrative, and financial factors
Authors: Gosdin Craig , Simmons Jeffrey , Yau Connie , Sucharew Heidi , Carlson Douglas , Paciorkowski Natalia 
Published: February 2013

BACKGROUNDMany pediatric academic centers have hospital medicine programs. Anecdotal data suggest that variability exists in program structure.OBJECTIVETo provide a description of the organizational, administrative, and financial structures of academic pediatric hospital medicine (PHM).METHODSThis online survey focused on the organizational, administrative, and financial aspects of academic PHM programs, which were defined as hospitalist programs at US institutions associated with accredited pediatric residency program (n = 246) and identified using the Accreditation Council for Graduate Medical Education (ACGME) Fellowship and Residency Electronic Interactive Database. PHM directors and/or residency directors were targeted by both mail and the American Academy of Pediatrics Section on Hospital Medicine LISTSERV.RESULTSThe overall response rate was 48.8% (120/246). 81.7% (98/120) of hospitals reported having an academic PHM program, and 9.1% (2/22) of hospitals without a program reported plans to start a program in the next 3 years. Over a quarter of programs provide coverage at multiple sites. Variability was identified in many program factors, including hospitalist workload and in‐house coverage provided. Respondents reported planning increased in‐house hospitalist coverage coinciding with the 2011 ACGME work‐hour restrictions. Few programs reported having revenues greater than expenses (26% single site, 4% multiple site).CONCLUSIONSPHM programs exist in the majority of academic centers, and there appears to be variability in many program factors. This study provides the most comprehensive data on academic PHM programs and can be used for benchmarking as well as program development. Journal of Hospital Medicine 2013;8:285–291. © 2013 Society of Hospital Medicine
A Case Study in Intercultural Management at Iter
Authors: Anglès Valérie 
Published: February 2013

AbstractMost international organizations, particularly multinational companies, have to deal with two cultures: the culture of the country of origin and that of the country where subsidiaries are located. The International Thermonuclear Experimental Reactor (Iter) project in Cadarache, France, requires the collaboration of individuals representing more than 30 different cultures at the same site. Consequently, Iter is considered not only a unique scientific project, but also an exceptional intercultural undertaking. Could some of the policies at Iter be reproduced elsewhere? Information collected over three years reflects the institutional contexts that favor or constrain these policies and allows for a comparison of Iter's intercultural management policies with those of other international organizations. © 2013 Wiley Periodicals, Inc.
Working on the “Change Chain” Drives a Transportation Division to Success
Authors: Glenner Moe 
Published: February 2013

AbstractWhen organizations are intent on changing the status quo, those who lead must be familiar with the dynamics of the change process. Not every change will lead to success; change can just as easily lead to disappointment. Ensuring that objectives are met in a change initiative requires understanding employees' needs—that is, what they consider the personal returns on investment that they expect in exchange for their time, talents, and effort. With that information in hand, managers can create a chain of success composed of these essential links: open communication, genuine interest, and widespread enthusiasm. At the transportation division of one Midwestern metals processing firm, this approach enabled the division leader to reenergize his workforce, reduce tardiness and absenteeism, and turn a money‐losing enterprise into a profitable one. © 2013 Wiley Periodicals, Inc.
Complementary split ring resonator‐based microstrip antenna for compact wireless applications
Authors: Laila D. , Sujith R. , Shameena V.A. , Nijas C.M. , Sarin V.P. , Mohanan P. 
Published: February 2013

AbstractA compact circular patch antenna operating at 2.48 GHz using multiple ring complementary split ring resonator (multiple ring CSRR) in the ground plane is presented.The resonant frequency depends on the parameters of the CSRR. The antenna is fabricated on a substrate of dielectric constant (εr) 4.4 and the thickness (h) 1.6 mm. A size reduction of 83% is achieved compared to standard circular patch antenna working at the same frequency. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:814–816, 2013; View this article online at wileyonlinelibrary.com. DOI: 10.1002/mop.27429
Robust variable‐fidelity optimization of microwave filters using co‐Kriging and trust regions
Authors: Koziel Slawomir , Leifsson Leifur , Couckuyt Ivo , Dhaene Tom 
Published: February 2013

AbstractThis work introduces a variable‐fidelity optimization methodology for simulation‐driven design optimization of filters. Our approach is based on electromagnetic (EM) simulations of different accuracy controlled by the mesh density. A Kriging interpolation model (the surrogate) is created using sampled low‐fidelity EM data and optimized to approximately locate the optimum of the high‐fidelity EM model of the filter. This initial surrogate is subsequently improved by blending in the high‐fidelity data accumulated during the optimization process using the co‐Kriging technique. The algorithm convergence is ensured by embedding it into the trust region framework. The operation and performance of our method is demonstrated using three filter design cases. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:765–769, 2013; View this article online at wileyonlinelibrary.com. DOI: 10.1002/mop.27447
Dual‐band wearable compact antenna for GPS and UMTS applications
Authors: Chen Liang‐Kai , Chien Tsung‐Fu , Luo Ching‐Hsing 
Published: February 2013

AbstractA novel dual‐band wearable compact antenna for the Global Positioning System (GPS) and Universal Mobile Telecommunications System (UMTS) is presented.The proposed antenna pattern is connected to the ground plane vertically and consists of a folded inverted‐F connected to two folded branches and a parasitic coupling arm. The measured antenna gain and radiation efficiency of the dual‐band antenna are 2.84 dBi/55.14 % and 3.05 dBi/94.08 % for the low band and high band, respectively. With a supporting sponge on the shielding ground, 1‐g average specific absorption rate (SAR) is decreased significantly to only 1.38 W/kg to comply with the linking power budget (21 dBm) for the UMTS band. Therefore, the proposed wearable compact dual‐band antenna is suitable for wearable device applications. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:859–863, 2013; View this article online at wileyonlinelibrary.com. DOI: 10.1002/mop.27455
Compact UWB microstrip antenna with satellite down‐link frequency rejection in X‐band communications by etching an E‐shaped step‐impedance resonator slot
Authors: Ojaroudi Nasser , Ojaroudi Mohammad , Amiri Shervin 
Published: February 2013

AbstractA multiresonance and UWB monopole antenna with frequency band‐notched function in 7.25–7.75 for downlink of X‐band satellite communication systems is presented.Proposed antenna consist of a square radiating patch with a pair of L‐shaped slots, a feed‐line with an E‐shaped step‐impedance resonator (SIR) slot, and a ground plane with a pair of L‐shaped conductor‐backed plane. In this design, by cutting a pair of modified L‐shaped slots with variable dimensions on the radiating patch and also by inserting a pair of L‐shaped conductor‐backed plane, additional resonances are excited and hence much wider impedance bandwidth can be produced especially at the higher band 125% (2.95–13.36). To achieve a band‐notched function an E‐shaped SIR slot was inserted in the feed‐line. Simulated and experimental results obtained for this antenna show that it exhibits good radiation behavior within the UWB frequency range. The designed antenna has a small size of 12 × 18 mm2. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:922–926, 2013; View this article online at wileyonlinelibrary.com. DOI: 10.1002/mop.27456
Miniaturized ultra wide band filter with extended stop band
Authors: Packiaraj D. , Vinoy K.J. , Ramesh M. , Kalghatgi A. T. 
Published: February 2013

AbstractThis article reports the design of extended stop band miniaturized ultra wide band (UWB) filter based on short‐circuited meandered coupled lines. In addition, rectangular‐shaped slots are incorporated in the ground plane beneath the input and output feed lines to improve the stop‐band rejection. The proposed filter has been realized in microstrip medium having thickness of 0.78 mm and dielectric constant of 2.17. Experimental results of the developed filter validate the results obtained from circuit models and full‐wave simulations. Maximum insertion loss of the experimental filter is 1.1 dB. Group delay variation over the pass band of the filter is within ±0.04 ns. Stop band is extended upto 30 GHz with a stop‐band rejection of better than 20 dB. Dimensions of the miniaturized experimented filter are 22 × 22 × 0.78 mm3. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:703–705, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27462
An approach to miniaturize bandpass filter with half‐wavelength resonators
Authors: Li Xiuping , Wang Huisheng 
Published: February 2013

AbstractIn this article, an approach to miniaturize bandpass filter with half‐wavelength resonators is proposed.Theoretical analysis shows that the passband of the filter can be shifted to lower frequency by shunt open stubs. Furthermore, to prove its practical viability, three miniaturized bandpass filters with T‐shape, comb‐shape, and interdigital‐like shunt open stubs are designed, fabricated, and compared. The filter with interdigital‐like shunt open stubs has the minimized size 13.3 × 8.5 mm2 and maximum insertion loss around − 1.7 dB. The simulated and measured results agree well. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:890–894, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27465
Renal perfusion imaging with two‐dimensional navigator gated arterial spin labeling
Authors: Tan Huan , Koktzoglou Ioannis , Prasad Pottumarthi V. 
Published: February 2013

PurposeTo develop a navigator technique enabling free‐breathing acquisition to afford sufficient signal averaging for quantitative renal perfusion measurement using arterial spin labeling MRI.MethodsA novel two‐dimensional (2D) navigator technique was implemented in concert with flow‐sensitive alternating inversion recovery (FAIR) preparation and true fast imaging with steady precession (True‐FISP) readout. The navigator images were obtained with a low‐resolution fast low angle shot readout at end of each arterial spin labeling acquisition. A retrospective algorithm was developed to automatically detect respiratory motion for selective signal averaging. The 2D navigator‐gated FAIR True‐FISP sequence was performed in ten healthy volunteers and five patients with chronic kidney disease.ResultsExcellent image quality and comparable cortical perfusion rates (healthy: 276 ± 28 mL/100 g/min, patients: 155 ± 25 mL/100 g/min) to literature values were obtained. An average of 3‐fold signal‐to‐noise ratio improvement was obtained in the 2D navigator‐gated approach compared with the breath‐hold acquisition in healthy volunteers. Good image quality was achieved in patients while the results from breath‐hold acquisition were unusable. The quantitative perfusion rates were significantly lower in chronic kidney disease patients compared with the healthy volunteers.Conclusion2D navigator‐gated free breathing arterial spin labeling is feasible and is a noninvasive method to evaluate renal perfusion both in healthy subjects and those with chronic kidney disease. Magn Reson Med 71:570–579, 2014. © 2013 Wiley Periodicals, Inc.
Copper oxide nanofibres for detection of hydrogen peroxide vapour at high concentrations
Authors: Hennemann Jörg , Kohl Claus‐Dieter , Reisert Steffen , Kirchner Patrick , Schöning Michael J. 
Published: February 2013

AbstractWe present a sensor concept based on copper(II)oxide (CuO) nanofibres for the detection of hydrogen peroxide (H2O2) vapour in the percent per volume (% v/v) range. The fibres were produced by using the electrospinning technique. To avoid water condensation in the pores, the fibres were initially modified by an exposure to H2S to get an enclosed surface. By a thermal treatment at 350 °C the fibres were oxidised back to CuO. Thereby, the visible pores disappear which was verified by SEM analysis. The fibres show a decrease of resistance with increasing H2O2 concentration which is due to the fact that hydrogen peroxide is an oxidising gas and CuO a p‐type semiconductor. The sensor shows a change of resistance within the minute range to the exposure until the maximum concentration of 6.9% v/v H2O2. At operating temperatures below 450 °C the corresponding sensor response to a concentration of 4.1% v/v increases. The sensor shows a good reproducibility of the signal at different measurements. CuO seems to be a suitable candidate for the detection of H2O2 vapour at high concentrations. Resistance behaviour of the sensor under exposure to H2O2 vapours between 2.3 and 6.9% v/v at an operating temperature of 450 °C.
Multi‐sensor chip for the investigation of different types of metal oxides for the detection of H2O2 in the ppm range
Authors: Reisert Steffen , Schneider Benno , Geissler Hanno , van Gompel Matthias , Wagner Patrick , Schöning Michael J. 
Published: February 2013

AbstractIn this work, a multi‐sensor chip for the investigation of the sensing properties of different types of metal oxides towards hydrogen peroxide in the ppm range is presented. The fabrication process and physical characterization of the multi‐sensor chip are described. Pure SnO2 and WO3 as well as Pd‐ and Pt‐doped SnO2 films are characterized in terms of their sensitivity to H2O2. The sensing films have been prepared by drop‐coating of water‐dispensed nano‐powders. A physical characterization, including scanning electron microscopy and X‐ray diffraction analysis of the deposited metal‐oxide films, was done. From the measurements in hydrogen peroxide atmosphere, it could be shown, that all of the tested metal oxide films are suitable for the detection of H2O2 in the ppm range. The highest sensitivity and reproducibility was achieved using Pt‐doped SnO2. Calibration plot of a SnO2, WO3, Pt‐, and Pd‐doped SnO2 gas sensor for H2O2 concentrations in the ppm range.
Influence of magnetic correlations on low‐field magnetoresistance in La2/3Sr1/3MnO3/SrTiO3 composites
Authors: Tang Yan‐kun , Ge Xue‐feng , Si Xiao‐fei , Zhao Wen‐juan , Wang Yu , Dong Shuai , Zhai Ya , Sui Yu , Su Wen‐Hui , Almasan C. C. 
Published: February 2013

AbstractWe report on the structure, magnetism, and transport properties of composites La2/3Sr1/3MnO3/SrTiO3 synthesized at 700 °C for 10 min. The results show that high‐field magnetoresistance is almost the same for all composites. However, an enhancement of the low‐field magnetoresistance is observed due to the weakening of the magnetic correlations with decreasing the La2/3Sr1/3MnO3 component of the composite. This paper suggests that the weakening of magnetic coupling between the nanostructured grains or films is a viable route to achieve a large magnetoresistance at low applied magnetic fields.
Capped and coupled Fe3O4/TiO2 nanopowder systems fabricated by sol–gel and a nonthermal method
Authors: Niyaifar Mohammad , Hasanpour Ahmad , Mohammadpour Hory , Amighian Jamshid 
Published: February 2013

AbstractIn this work, Fe3O4/TiO2 core–shell and composite nanopowders have been prepared to study their structural and magnetic properties. First a conventional sol–gel method was used to synthesize Fe3O4 and TiO2 nanoparticles separately. Then, they were combined to each other in two different geometries of core–shell and composite nanopowders. The samples were characterized by analytical techniques including XRD, TEM, SEM, and VSM. The results show the successful covering of the Fe3O4 nanoparticles surfaces with TiO2 in core–shell samples. In composite samples annealed at 400, 500, 600 °C, magnetite nanoparticles are distributed randomly in the TiO2 matrix. The magnetic measurements show that the core–shell sample, fabricated by a nonthermal method, has higher saturation magnetization than composite samples. Moreover, the values of the saturated magnetization of Fe3O4/TiO2 nanoparticles decreased with increasing calcined temperature.
Evolution from a magnetically correlated state to a single impurity state in heavy fermion system Ce3−xLaxCo4Sn13
Authors: Ślebarski A. , Fijałkowski M. , Goraus J. 
Published: February 2013

AbstractCe3Co4Sn13 crystallizes in the cubic Yb3Rh4Sn13 structure, which is closely related to the one of scutterudites, well known thermoelectric materials. Ce3Co4Sn13 exhibits novel physical properties, a large increase in Cmag/T was recently observed at low temperatures with a maximum value of about 4 J K−2 ${\rm mol}_{{\rm Ce}}^{- 1} $. The specific heat data suggested that Ce3Co4Sn13 is likely near a magnetic quantum critical point (QCP). In this report we investigate the low‐temperature specific heat of Ce3−xLaxCo4Sn13 in order to study the proximity of Ce3Co4Sn13 to the possible magnetic QCP. We found the critical concentration xc ≈ 0.6 which separates the magnetically correlated state with a maximum in C(T)/T at ∼0.7 K for x < xc, and a single impurity state for x > xc in heavy fermion (HF) system Ce3−xLaxCo4Sn13. However, for xc the low‐temperature C(T)/T behaviour is not characteristic of the QCP.
Fluctuations and the ferromagnetic instability in YFe2Al10: The role of Fe stoichiometry
Authors: Strydom A. M. , Khuntia P. , Baenitz M. , Peratheepan P. , Steglich F. 
Published: February 2013

AbstractYFe2Al10 forms in a well‐ordered crystal structure, with a unique site for the magnetic atom Fe. At elevated temperatures YFe2Al10 behaves electronically as a good metal. At low temperatures on the other hand, signatures of correlated behavior develop and eventually non‐Fermi‐liquid scaling dominates all of the physical properties: the electrical resistivity develops a negative temperature coefficient below 20 K, and the specific heat Cp(T)/T and χ(T) both assume a power‐law increase upon lowering the temperature below ≃3 K. Lowest temperature studies have failed to find magnetic ordering in YFe2Al10 in spite of compelling evidence that there is impending order in this compound and that it is indeed of ferromagnetic character. Here we report on measurements of thermal and electronic transport as well as heat capacity studies on the series of compounds YFe2 + δAl10 with δ ≤ |0.1|, with the purpose of testing the stability of the low‐temperature divergences in physical properties against off‐stoichiometric Fe.
Characteristic energy scales in CePdAl
Authors: Woitschach Sarah , Stockert Oliver , Koza Michael Marek , Fritsch Veronika , von Löhneysen Hilbert , Steglich Frank 
Published: February 2013

AbstractWe report on inelastic neutron scattering experiments that were carried out on single‐crystalline CePdAl, which is a heavy fermion system with hexagonal crystal structure and is close to an antiferromagnetic quantum critical point. The measurements yield information on the crystalline‐electric‐field (CEF) excitations and quasielastic spin fluctuations. Two excited CEF levels have been detected at ≈240 K and >400 K. A broad quasielastic magnetic signal could be observed, yielding a Kondo temperature TK = 5 K that agrees with the result from thermodynamic measurements.
Magnetization and specific heat of CePd1 − xNixAl
Authors: Fritsch Veronika , Huang Chien‐Lung , Bagrets Nadezda , Grube Kai , Schumann Sarah , Löhneysen Hilbert v. 
Published: February 2013

AbstractCePdAl crystallizes in the hexagonal ZrNiAl‐type structure (space group $P\overline {6} 2m$), where the magnetic Ce3+ ions form a network of equilateral triangles in the ab plane similar to the kagomé lattice. It is a well known antiferromagnetic heavy‐fermion system with Néel temperature TN = 2.7 K. Magnetization and specific‐heat measurements performed on CePd1 − xNixAl polycrystals show that the antiferromagnetic order in the system is suppressed by Ni substitution. TN is reduced to zero temperature at a Ni concentration x = 0.144. At high temperatures the magnetization data follow a Curie–Weiss law. The Weiss temperature $\Theta $ is negative with $\left| {\Theta } \right|$ increasing with x possibly due to the increasing Kondo effect. Indeed, the Kondo temperature increases with x as documented by an analysis of the specific heat and magnetic entropy of CePd1 − xNixAl for the samples with x = 0, 0.062, 0.097, and 0.144.