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landa展示纳米图像技术

印刷杂志 2021年第4期 77-77页

作者： landa landa

landa数字印刷和三家中国合作伙伴——方正电子、好利印和泛彩图像一起参加了China Print 2021,向参观者展示了纳米图像印刷技术,同时也有专家现场解释它将如何在高质量的中短版印刷领域开辟新的、具有成本效益的商业机会。

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克制的否定——马克思论消费

马克思主义哲学 2024年第4期 88-101页

作者： [以色列]I.兰达马新晶(译) 以色列开放大学中国社会科学院大学哲学院中国社会科学院哲学研究所

本文回顾了马克思对消费的理解,并试图将其从黯然失色的批判理论阴影中拯救出来,后者将马克思的理论阐释为对虚假需求的猛烈扦击。有人认为,马克思以一种普遍有利的方式看待资本主义所带来的需求扩张,但却认为资本主义是一种将使用价值... 详细信息

本文回顾了马克思对消费的理解,并试图将其从黯然失色的批判理论阴影中拯救出来,后者将马克思的理论阐释为对虚假需求的猛烈扦击。有人认为,马克思以一种普遍有利的方式看待资本主义所带来的需求扩张,但却认为资本主义是一种将使用价值与利润积累的必要性捆绑在一起的制度,从而限制和压抑了大众消费。虽然马克思的立场与传统的反消费主义截然不同,但与对“消费社会”的自鸣得意的肯定也同样是不相容的,因为马克思一直致力于一场革命性变革,这场变革将从量和质两个方面改变消费。本文首先讨论马克思在《1844年经济学哲学手稿》中的观点,这一文本也是一直以来被大家引用的文本。第二部分继续考察马克思的思想在后续文本特别是《政治经济学批判(1857-1858年手稿)》中的进一步演变。

关键词：马克思马克思主义批判理论消费消费主义物质文化

An application programming interface with increased performance for optimisation problems data

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Journal of Management Analytics 2016年第4期3卷 305-332页

作者： Rodrigo Lankaites Pinheiro Dario landa-Silva Rong Qu Ademir Aparecido Constantino Edson Yanaga ASAP Research Group School of Computer ScienceUniversity of NottinghamNottinghamUK Departamento de Informática Universidade Estadual de MaringáMaringáBrazil Unicesumar-Centro Universitário Cesumar MaringáBrazil

An optimisation problem can have many forms and *** may consider different objectives,constraints,and *** that reason,providing a general application programming interface(API)to handle the problem data efficiently in all scenarios is ***,on an R&D environment involving personnel from distinct backgrounds,having such an API can help with the development process because the team can focus on the research instead of implementations of data parsing,objective function calculation,and data ***,some researchers might have a stronger background in programming than others,hence having a standard efficient API to handle the problem data improves reliability and *** paper presents a design methodology to enable the development of efficient APIs to handle optimisation problems data based on a data-centric development *** proposed methodology involves the design of a data parser to handle the problem definition and data files and on a set of efficient data structures to hold the data in ***,we bring three design patterns aimed to improve the performance of the API and techniques to improve the memory access by the user ***,we present the concepts of a Solution Builder that can manage solutions objects in memory better than built-in garbage collectors and provide an integrated objective function so that researchers can easily compare solutions from different solving ***,we describe the positive results of employing a tailored API to a project involving the development of optimisation solutions for workforce scheduling and routing problems.

关键词： optimisation problems data API efficient data structures research and development projects

New insights into the pathophysiology of achalasia and implications for future treatment

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World Journal of Gastroenterology 2016年第35期22卷 7892-7907页

作者： Janette Furuzawa-Carballeda Samuel Torres-landa Miguel ángel Valdovinos Enrique Coss-Adame Luis A Martín del Campo Gonzalo Torres-Villalobos Department of Immunology and Rheumatology Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Department of Experimental Surgery Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Department of Gastroenterology Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán

Idiopathic achalasia is an archetype esophageal motor disorder, causing significant impairment of eating ability and reducing quality of life. The pathophysiological underpinnings of this condition are loss of esophageal peristalsis and insufficient relaxation of the lower esophageal sphincter(LES). The clinical manifestations include dysphagia for both solids and liquids, regurgitation of esophageal contents, retrosternal chest pain, cough, aspiration, weight loss and heartburn. Even though idiopathic achalasia was first described more than 300 years ago, researchers are only now beginning to unravel its complex etiology and molecular pathology. The most recent findings indicate an autoimmune component, as suggested by the presence of circulating anti-myenteric plexus autoantibodies, and a genetic predisposition, as suggested by observed correlations with other well-defined genetic syndromes such as Allgrove syndrome and multiple endocrine neoplasia type 2 B syndrome. Viral agents(herpes, varicella zoster) have also been proposed as causative and promoting factors. Unfortunately, the therapeutic approaches available today do not resolve the causes of the disease, and only target the consequential changes to the involved tissues, such as destruction of the LES, rather than restoring or modifying the underlying pathology. New therapies should aim to stop the disease at early stages, thereby preventing the consequential changes from developing and inhibiting permanent damage. This review focuses on the known characteristics of idiopathic achalasia that will help promote understanding its pathogenesis and improve therapeutic management to positively impact the patient's quality of life.

关键词： Achalasia Treatment Autoimmune disease Pathophysiology

Use of δ^(18)O, δ^(13)C and NO_(3)^(-) to identify hydrogeochemical processes related to contamination in an aquifer located in central Mexico

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Acta Geochimica 2022年第3期41卷 367-392页

作者： JoséIván Morales-Arredondo María Aurora Armienta Hernández Fátima Juárez-Aparicio Jorge Federico landa-Arreguín Itzamna Zaknite Flores-Ocampo Natural Resources Department Institute of GeophysicsNational Autonomous University of MexicoCiudad Universitaria No.3000Col.Copilco UniversidadCoyoacan Delegation04360 MexicoCDMXMexico Earth Sciences Postgraduate Program University National Autonomous of MexicoUniversity City No.3000Col.Copilco UniversityCoyoacán Delegation04510 MexicoCDMXMexico

In this work,an isotopic analysis of δ^(18)O,δ^(13)C,and NO_(3)^(-) concentrations was carried out to identify the origin and the processes related to the contamination of an aquifer located in the state of Guanajuato,*** research identified the possible sources of δ^(13)C in *** groundwater flow,CO_(2) participates in different hydrogeochemical reactions in which the dissolution of carbonates or biochemical processes related to biodegradation stand *** data of δ^(13)C,δ^(18)O,and the hydrogeochemical behavior of NO_(3)^(-) and HCO_(3)^(-) in water,in addition to isotopic data and the chemical composition of limestones in the study area,were determined to establish the isotopic signature and the processes undergone by the *** isotopic signature of rock and water samples indicated that metamorphic limestones contributed with carbon dioxide to deep groundwater,while in the upper aquifer,bacterial metabolic reactions during nitrification–denitrification could modify the isotopic signature of δ^(13)C in some wells,although atmospheric contribution also plays a *** modification of the carbon isotopic component is related to the precipitation of calcite in specific regions of the study area,input of atmospheric CO_(2),and soil(*** possible participation of C4-type plants in the assimilation-release of carbon).This process is not confirmed or completely ruled out in this study since agriculture is excessively developed throughout the *** joint interpretation of isotopic values and the hydrogeochemical behavior of major and conservative elements help in identifying possible pollution processes in which different carbon sources are related.

关键词： ^(18)O and^(13)C isotopes Groundwater pollution Nitrate Limestone

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一种由地震反射资料求速度和深度的方法

国外油气勘探 1989年第6期 24-34页

作者： E.landa 孙汝江

速度和深度估算是地震资料处理和解释中的一个重要步骤。本文介绍了一种由叠前资料估算速度—深度模型的方法。这一方法是由一种产生模型的迭代算法构成,产生的这种模型能使沿着由追踪穿过模型的射线产生的旅行时计算的某种相干性量度... 详细信息

速度和深度估算是地震资料处理和解释中的一个重要步骤。本文介绍了一种由叠前资料估算速度—深度模型的方法。这一方法是由一种产生模型的迭代算法构成,产生的这种模型能使沿着由追踪穿过模型的射线产生的旅行时计算的某种相干性量度最大。在模型中,界面用三次样条函数表示,并且假设各层的速度为常数。反演包括求取所有层位的速度和样条结点的位置。处理的输入数据包括叠前地震资料和一个初始速度—深度模型。这个模型通常以附近的井下信息和叠加剖面的解释结果为依据。通过逐层迭代处理进行反演,在各次迭代过程中,都要计算所研究的界面的合成时距曲线。然后沿合成波至时间形成表征波场主相关特性的泛函。文中假设当合成波至时间曲线与野外道集同相轴的波至时间相一致时泛函达到最大。函数的最大值是用非线性程序设计的有效算法求得的。这种反演算法的优点是不需要在叠前资料上拾取同相轴,并且不是以波至时间的双曲线近似的曲线拟合为依据的。这种方法已成功地用于合成资料和野外资料。

关键词：均方根速度深度估算相关分析射线跟踪

Design and Development of an Electronic Sensor to Detect and Measure Curvature of Spaces Using Curvature Energy

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Journal of Sensor Technology 2012年第3期2卷 116-126页

作者： Francisco Bulnes Isaías Martínez Antonio Mendoza Manuel landa Department of Research in Mathematics and Engineering Technological Institute of High Studies of Chalco Chalco Mexico Headquarters of Electronic Engineering Technological Institute of High Studies of Chalco Chalco México

Using fine electromagnetic signals to measure observables of other fields like curvature and torsion of a space, and the corresponding value of their integrals of the action of perception of curvature through electronic signals that detect curvature on a curved surface, it is designed and constructed a sensor of curvature of accelerometer type that detects and curvature measures in 2 and 3-dimensional spaces using the programming of shape operators on spheres and the value of their integrals along the curves and geodesics in their principal directions.

关键词： Sensor of Curvature Curvature Detection Curvature Accelerometer Electronic Curvature Perception Sensor-Perception Curve Curvature Energy

Involvement of Estrogen Receptors in the Anxiolytic-Like Effect of Phytoestrogen Genistein in Rats with 12-Weeks Postovariectomy

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Pharmacology & Pharmacy 2012年第4期3卷 439-446页

作者： Juan Francisco Rodríguez-landa Fabiola Hernández-López Margarita Saavedra Institute of Neuroethology Universidad VeracruzanaAv.Dr.Luis Castelazo s/nCol.Industrial Las AnimasVeracruzMexico Faculty of Biological Pharmaceutical Chemistry Universidad VeracruzanaVeracruzMexico

Phytoestrogens are natural compounds found in some vegetables, and they replicate many of the physiochemical and physiological properties of estrogens, including the regulation of mood. The phytoestrogen genistein exerts anxiolytic-like effects in rats with a chronic absence of ovarian hormones, but the mechanism involved in this effect remains to be explored. The present study explored the participation of estrogen receptor-β in the anxiolytic-like effect of genistein (1.0 mg/kg, i.p., for 4 days) in Wistar rats with 12-weeks postovariectomy, considered as experimental model of post-surgical menopause. In the light/dark test, a useful tool for anxiety study and for the screening of anxiolytic drugs, genistein reduced the latency to enter and increased the time spent in the light compartment and significantly increased the frequency and time spent exploring the light compartment compared with the control group, which is considered as an anxiolytic-like effect at experimental level. All behavioral effects produced by genistein in the light/dark test were blocked by previous tamoxifen administration (5.0 mg/kg, s.c., for 6 days), a non selective antagonist for estrogen receptor-β. The effects produced by genistein or tamoxifen in this test were not related to significant changes in general motor activity evaluated in the open field test. In conclusion, the specific contribution of present investigation was identify that estrogen receptor-β is involved in the anxiolytic-like effect produced by phytoestrogen genistein in rats with a long-term absence of ovarian hormones;supporting the hypothesis that estrogen receptor-β participates in the regulation of anxiety associated with low concentration of ovarian hormones and in the anxiolytic-like effects produced by natural estrogenic compounds such as phytoestrogens.

关键词： Anxiety Genistein Phytoestrogen Estrogen Receptor-β Light/Dark Test Tamoxifen

De-novo hepatocellular carcinoma after pediatric living donor liver transplantation

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World Journal of Hepatology 2017年第36期9卷 1361-1366页

作者： Samuel Torres-landa Armando Salim Munoz-Abraham Brett E Fortune Ananta Gurung Jeffrey Pollak Sukru H Emre Manuel I Rodriguez-Davalos Michael L Schilsky Department of Gastrointestinal Surgery Hospital of the University of Pennsylvania Department of Surgery Yale University School of Medicine Division of Gastroenterology and Hepatology Weill Cornell Medicine Department of Pathology Royal Columbian Hospital Department of Radiology and Biomedical Imaging Yale University School of Medicine Division of Digestive Diseases and Transplant and Immunology Department of Medicine and Surgery Yale University School of Medicine

De-novo malignancies carry an incidence ranging between 3%-26% after transplant and account for the second highest cause of post-transplant mortality behind cardiovascular disease. While the majority of de-novo malignancies after transplant usually consist of skin cancers, there has been an increasing rate of solid tumor cancers over the last 15 years. Although, recurrence of hepatocellular carcinoma(HCC) is well understood among patients transplanted for HCC, there are increasing reports of de-novo HCC in those transplanted for a non-HCC indication. The proposed pathophysiology for these cases has been mainly connected to the presence of advanced graft fibrosis or cirrhosis and always associated with the presence of hepatitis B or C virus. We report the first known case of de-novo HCC in a recipient, 14 years after a pediatric living related donor liver transplantation for end-stage liver disease due to biliary atresia without the presence of hepatitis B or C virus before and after transplant. We present this case report to increase the awareness of this phenomenon and address on the utility for screening and surveillance of hepatocellular carcinoma among these individuals. One recommendation is to use similar guidelines for screening, diagnosis, and treatment for HCC as those used for primary HCC in the pre-transplant patient, focusing on those recipients who have advanced fibrosis in the allograft, regardless of etiology.

关键词： Liver transplantation De-novo hepatocellular carcinoma Living donor liver transplantation Biliary atresia