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Field report:Sailing around the exhumed roots of the Mesozoic Patagonian paleo-accretionary wedge(Diego de Almagro Island,Chile)

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geoscience Frontiers 2018年第5期9卷 1591-1594页

作者： samuel Angiboust Jesus Munoz Institut de Physique du globe de Paris Sorbonne Paris CitéUniversity Paris DiderotCNRSF-75005ParisFrance gFZ german Research Centre for geosciences D-14473PotsdamGermany Carrera de geología Universidad Andres BelloSazie2119SantiagoChile

We undertook a boat expedition to explore the geological framework of a very remote, lesser-known island, in the Chilean Patagonia: the Diego de Almagro Island(latitude S51°330'). This uninhabited, ca.400 km^2 Island is one of the very rare exposures of the Mesozoic accretionary subduction complex along the Chilean margin. Unstable weather, strong winds, steep topography, and very dense vegetation make an on-land mission difficult. Careful preparation based on high-resolution satellite images is advised to optimize shore access and minimize risks of injury. Despite a relatively important degree of regional reequilibration of metamorphic assemblages due to sluggish exhumation through the forearc crust, our results have shown that the island is composed of a nappe stack of ocean-floor derived slivers of metasedimentary units that exhibit very different pressure-temperature-time paths during burial by subduction under the Chilean margin and subsequent exhumation. These rocks are witness to a complex thermal evolution of the subduction zone between Jurassic and Cretaceous times from granulite facies to blueschist facies conditions as well as multiple episodes of accretion at ca. 35 -40 km in depth for almost100 Ma over the Mesozoic era.

关键词： Patagonia Accretionary wedge Blueschists Subduction Chile

A geometry-based framework for modeling the complexity of origami folding

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Theoretical & Applied Mechanics Letters 2021年第3期11卷 115-124页

作者： samuel Schulman Xin Ning Department of Aerospace Engineering The Pennsylvania State UniversityUniversity ParkPennsylvania 16802USA

This paper presents a quantitative framework to analyze the complexity of folding origami structures from flat *** efforts have realized intricate origami patterns with desired functions such as mechanical properties,packaging efficiency,and deployment ***,the complexity associated with the manufacturing or folding of origami patterns has not been *** how difficult origami structures are to make,and how much time they require to form is crucial information to determining the practical feasibility of origami designs and future applications such as robotic origami assembly in *** this work,we develop this origami complexity metric by modeling the geometric properties and crease formation of the origami structure,from which it outputs crease and pattern complexity values and a prediction of the time to complete the pattern assembly,based on the characteristics of the *** framework is experimentally validated by fabricating various Miura-ori origami paper models.

关键词： Origami folding Framework Miura-ori

A correction of the 2D kdV equation of Djordjevic & Redekopp in exponentially stratified fluid

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Acta Mechanica Sinica 2005年第4期21卷 346-352页

作者： Zhaoting Xu guojin Shen samuel Shan-pu Shen Institute Of Physical Oceanography and Physical Oceanography Laboratory Ocean University of China Qingdao 266003 China Department of Mathematics and Statistics Science University of Alberta Edmonton Alberta T6G 2G 1 Canada

To further study the nal solitons on the continental fission laws of initial intershelf/slope, we rederive and correct the 2D kdV equation of Djordjevic ＆ Redekopp for exponentially stratified fluid （or ocean） and with twodimensional topography. Through a combination of theoretical study and numerical experiments, we show that solitons in the odd vertical modes can fission. However, because of the corrections, the fission conditions are different from those of Djordjevic ＆ Redekopp. The even modes cannot fission unless the initial internal solitons propagate from shallow sea to deep sea. This conclusion is entirely opposite to that of Djordjevic ＆ Redekopp.

关键词： Internal wave Soliton Fission 2D kdV equation

Superior mesenteric venous thrombosis: Endovascular management and outcomes

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World Journal of Clinical Cases 2022年第1期10卷 217-226页

作者： khaled Alnahhal Beau B Toskich samuel Nussbaum Zhuo Li Young Erben Albert g Hakaim Houssam Farres Department of Surgery Division of Vascular SurgeryMayo Clinic FloridaJacksonvilleFL 32224United States Department of Radiology Mayo Clinic FloridaJacksonvilleFL 32224United States Department of Biostatistics Mayo Clinic FloridaJacksonvilleFL 32224United States

BACkgROUND Superior mesenteric venous thrombosis(SMVT)is a rare but fatal condition that is typically treated initially with anticoagulation therapy,and if this fails,with endovascular ***,due to its rarity,there are not many studies that have explored the effectiveness of anticoagulation and endovascular therapies in treating *** To evaluate patients diagnosed with SMVT who received endovascular therapy in addition to anticoagulation and report technical and clinical *** A retrospective analysis of the patients who underwent endovascular treatment for SMVT at Mayo Clinic from 2000-2019 was *** success was defined as angiographic improvement in SMV flow after *** patency was defined as the interval from reestablishing mesenteric venous flow until the first repeat thrombotic event or need for additional *** patency was defined as successful restoration of flow after repeat intervention until rethrombosis or last *** adverse events were reported through Clavien-Dindo *** Twenty-four patients were included for *** median age at intervention was 60 years(35-74 years)and 16(67%)were *** patients presented with acute thrombosis(79.2%)and 5 with chronic thrombosis with acute manifestations(20.8%).The most commonly used endovascular modalities were thrombectomy in 12 patients(50.0%)and catheter-directed thrombolysis in 10 patients(41.7%).Technical success was achieved in 18 patients(75%).The 14-d and 30-d primary patency rates were 88.9%and 83.3%,*** events were reported in two patients(8.3%),one marked as grade IIIB,and 1 death marked as grade ***-year overall survival rate was 82%(58%-100%).CONCLUSION Endovascular intervention with anticoagulation appears to be effective for managing *** treatment combination may be considered as first-line therapy for SMVT management in select patients.

关键词： Superior mesenteric venous thrombosis Endovascular Anticoagulation Retrospective Thrombectomy Mesenteric Thrombolysis

EXTENDED WARRANTY STRATEgIES FOR ONLINE SHOPPINg SUPPLY CHAIN WITH COMPETINg SUPPLIERS CONSIDERINg COMPONENT RELIABILITY

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Journal of Systems Science and Systems Engineering 2017年第6期26卷 753-773页

作者： Xinghong Qin Qiang Su samuel H. Huang 1.School of Economics and Management Tongji University Shanghai 200092 China 2.School of Business Planning Chongqing Technology and Business University Chongqing 400067 China 3.Department of Mechanical and Materials Engineering University of Cincinnati Cincinnati OH 45221 USA

This article presents the issue of extended warranty and management strategies in a three-echelon competing online shopping supply chain with price- and base warranty period-dependent demand. We employ game theory to develop decision models to explore the interactions between component suppliers and the manufacturer, as well as competition between two component suppliers. Products and extended warranty are sold by an online store, which is the leader in the Stackelberg game. Two scenarios are considered： either the manufacturer offers a prepaid extended warranty to customers or doses not. In each scenario, base warranties are assumed to be bundled with products. Our results show that when the manufacturer＇s repair costs change in a proper range, providing extended warranty can benefit both the manufacturer and the online store; otherwise, the manufacturer has no incentive to offer the extended warranty. Reducing repair costs, improving component reliability, or shortening the base warranty period allows the manufacturer to realize significantly better value of the extended warranty. High component reliability benefits both the manufacturer and the online store, with the manufacturer reaping more benefit. Extending the length of the base warranty adversely affects profit of the manufacturer and the value of the extended warranty.

关键词： Extended warranty online shopping supply chain game theory online shopping

Ethical decision-making in older drivers during critical driving situations: An online experiment

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Journal of Intelligent and Connected Vehicles 2024年第1期7卷 30-37页

作者： Amandeep Singh Sarah Yahoodik Yovela Murzello samuel Petkac Yusuke Yamani Siby samuel Department of Systems Design Engineering University of WaterlooWaterloo N2L 3G1Canada Department of Psychology Old Dominion UniversityNorfolk 23529USA

The present study examined the impact of aging on ethical decision-making in simulated critical driving scenarios.204 participants from North America,grouped into two age groups(18–30 years and 65 years and above),were asked to decide whether their simulated automated vehicle should stay in or change from the current lane in scenarios mimicking the Trolley *** participant viewed a video clip rendered by the driving simulator at Old Dominion University and pressed the space-bar if they decided to intervene in the control of the simulated automated vehicle in an online *** hierarchical models were used to analyze participants’responses,response time,and acceptability of utilitarian ethical *** results showed significant pedestrian placement,age,and time-to-collision(TTC)effects on participants’ethical *** pedestrians were in the right lane,participants were more likely to switch lanes,indicating a utilitarian approach prioritizing pedestrian *** participants were more likely to switch lanes in general compared to older *** results imply that older drivers can maintain their ability to respond to ethically fraught scenarios with their tendency to switch lanes more frequently than younger counterparts,even when the tasks interacting with an automated driving *** current findings may inform the development of decision algorithms for intelligent and connected vehicles by considering potential ethical dilemmas faced by human drivers across different age groups.

关键词： ethical decision making age-differences utilitarianism moral dilemmas driver behavior simulated driving bayesian hierarchical model

Physical universals in problem of precursor soliton generation

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Science China Earth Sciences 1997年第3期40卷 306-314页

作者：徐肇廷 samuel Shan-pn SHEN Institute of Physical Oceanography and Physical Oceanography Laboratory Ocean University of QingdaoQingdao 266003 China Department of Mathematics and Applied Mathematics Institute University of AlbertaEdmondon T6G 2G1Canada

Six physical universals and two general relations in the problem of locally forced precursor soliton generation are found theoretically in terms of the AfkdV equation derived by authors. These six universals and two general relations are examined by experiment and numerical calculation of two-layer flow based on the canonical character of the coefficients of the fkdV equations. From comparisons among the theoretical, numerical and experimental results, it is shown that they are in good agreement. There is not any free parameter in this theory, so the theory of the present paper can be used to predict the wave properties of locally forced precursor soliton generation.

关键词： precursor soliton fkdV equation AfkdV equation physical universal

An evaluation of digital elevation modeling in gIS and Cartography

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geo-Spatial Information Science 2014年第2期17卷 139-144页

作者： Bola AYENI kayode Julius samuel Department of geography University of IbadanIbadanNigeria Department of geography&Resource Management Osun State UniversityOkukuNigeria

This study considers seven commonly used surface fitting methods within golden Software and ArcgIS^(TM) *** grid sizes of 68 rows by 100 columns(6800 grids)and 680 rows by 1000 columns(680,000 grids)and 294,208 elevation points covering the entire landmass of Nigeria,the study evaluates the performance of these methods in terms of execution time and faithfulness in the representation of the spatial *** show marked differences in time taken to execute the fitting and that Inverse Distance,the Natural Neighbor,the Nearest Neighbor,and Triangulation with Linear Interpolation seem to give the highest level of correspondence or faithfulness.

关键词： image surface fitting digital elevation modelling gIS cartography

On Models of Nonlinear Evolution Paths in Adiabatic Quantum Algorithms

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Communications in Theoretical Physics 2013年第1期59卷 22-26页

作者：孙杰路松峰 samuel L.Braunstein School of Computer Science Huazhong University of Science and Technology Department of Computer Science University of York

In this paper,we study two different nonlinear interpolating paths in adiabatic evolution algorithms for solving a particular class of quantum search problems where both the initial and final Hamiltonian are one-dimensional projector Hamiltonians on the corresponding ground *** the overlap between the initial state and final state of the quantum system is not equal to zero,both of these models can provide a constant time speedup over the usual adiabatic algorithms by increasing some another corresponding "complexity".But when the initial state has a zero overlap with the solution state in the problem,the second model leads to an infinite time complexity of the algorithm for whatever interpolating functions being applied while the first one can still provide a constant running ***,inspired by a related reference,a variant of the first model can be constructed which also fails for the problem when the overlap is exactly equal to zero if we want to make up the "intrinsic" fault of the second model - an increase in *** concrete theorems are given to serve as explanations why neither of these two models can improve the usual adiabatic evolution algorithms for the phenomenon *** just tell us what should be noted when using certain nonlinear evolution paths in adiabatic quantum algorithms for some special kind of problems.

关键词： adiabatic evolution nonlinear evolution paths quantum computing