Results 101 to 110 of about 19,139 (205)

Una Matriz de Contabilidad Social de México y un análisis estructural de la economía mexicana

open access: yesEstudios Sociales, 2010
El objetivo central de este trabajo es el de presentar una Matriz de Contabilidad Social (MCS) de la economía mexicana para 1996, detallando la metodología que seguimos para construirla. Ilustramos aquí su utilidad llevando a cabo un análisis estructural
Gaspar Núñez, Clemente Polo
doaj  

神经电生理检查在诊断C6-7脊髓病中的临床应用

open access: yesZhongguo shiyan zhenduanxue, 2022
脊髓病的发病率及确诊率逐年增加[1-4],脊髓病最初的临床症状主要为上肢感觉异常,随病情进展,还可出现四肢运动障碍[5]。典型的病例可通过查体和影像学获得明确诊断[2]。但是,少数脊髓病患者表现为上肢轻微症状或无症状,容易被误诊,甚至手术后症状不缓解。C6-7是脊髓病常见发病部位,对于多节段脊髓受压症状不典型患者,无法根据症状定位责任节段,对后续治疗造成严重困扰。既往研究表明脊髓诱发电位可用于评估脊髓通路的完整性[6-8]。本研究对比了无症状C6-7脊髓病患者和健康人群的中枢运动传导时间 ...
吴立杰   +5 more
doaj  

Efficiency analysis of producers’ organizations (Case of South Eastern and Central planning regions of Bulgaria) [PDF]

open access: yes
The main aim of this paper is to compare two alternative methods for estimating frontier functions and measuring efficiency in production. The application of Data Envelopment Analysis (DEA) and Stochastic Frontier Analysis (SFA) to the same data panel ...
Zaimova, Darina
core   +1 more source

Isospin dependence of nucleon emission and radial flow in heavy-ion collisions induced by high energy radioactive beams

open access: yes, 2004
Using an isospin- and momentum-dependent transport model we study the emission of free nucleons and the nuclear radial flow in central heavy-ion collisions induced by high energy radioactive beams.
B. A. Li   +3 more
core   +1 more source

Design and Implementation of a DSP-Based MIMO System Prototype for Real-Time Demonstration and Indoor Channel Measurements

open access: yesEURASIP Journal on Advances in Signal Processing, 2005
The design and implementation of the Virginia Tech Space-Time Advanced Radio (VT-STAR), a multiple antenna element space-time (ST) processing prototype testbed, is presented.
Jeffrey H. Reed   +6 more
doaj   +1 more source

On the nuclear symmetry energy and the neutron skin in neutron-rich nuclei

open access: yes, 2003
The symmetry energy for nuclear matter and its relation to the neutron skin in finite nuclei is discussed. The symmetry energy as a function of density obtained in a self-consistent Green function approach is presented and compared to the results of ...
Dewulf, Y.   +4 more
core   +2 more sources

Agricultural Credit Interest Rate Equalization Policy: A Growth Subsidy? [PDF]

open access: yes
The Brazilian Interest Rate Equalization System (IRES) subsidizes farmers by providing them with credit at lower than market interest rates. The objective of this research is to evaluate the IRES by comparing its monetary cost with its benefits as ...
Castro, Eduardo Rodrigues de   +1 more
core   +1 more source

Eficiencia de la educación secundaria en México, 2010-2017: Un estudio a nivel municipal a través del análisis de la envolvente de datos

open access: yesPerfiles Latinoamericanos
Este artículo identifica el grado de eficiencia en el uso de los insumos de las escuelas secundarias en México a nivel municipal durante el periodo 2010-2017.
Odette Virginia Delfín Ortega   +2 more
doaj   +1 more source

The excess burden of cancer in men in the UK [PDF]

open access: yes, 2009
In general men are at significantly greater risk than women from nearly all of the common cancers that occur in both sexes (with the exception of breast cancer) (White 2009, Wilkins 2006, DH 2007).
FORMAN, D, THOMPSON, C, WHITE, A
core  

Further evidence for narrow exotic low mass baryons

open access: yes, 2004
Although narrow low mass baryonic structures, observed mainly in SPES3 (Saturne) data, were not confirmed in recent experiments using lepton probes, their existence is confirmed in other data, where hadronic probes were used.Comment: 5 pages, 3 ...
Tatischeff, B.
core   +1 more source

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