检索结果-南通市图书馆

Ageism: Millennial Persistence

在线全文

学校读者我要写书评

暂无评论

Advances in Aging Research 2024年第1期13卷 1-14页

作者： Alejandro Klein Oxford Institute of Population Ageing University of Guanajuato Leon Mexico

This work develops the idea that is possible to affirm that beyond its nuances. Ageism has shown a surprising force of prevalence in western society. Nourished by mythical, empirical, ideological and health elements, it has been enormously successful in imposing an image of vulnerability, decrepitude and illness on older adults. Since 1969, when the first academic article on the subject was published, much has been written on the subject, but little progress has been made in terms of social and state policies and community awareness. When an attempt has been made to propose an alternative to decrepit (Aristotelian as we suggest in this paper) ageism, nothing has emerged but a new kind of ageism that has imposed the supposed need that the older adult “must” be “productive”, “young”, “vigorous”, posing the impossibility, in short, once again, of the older adult living spontaneously as an older adult.

关键词： Ageism Stereotypes Prejudices

Strategic Analysis to Develop an Internationalization Plan for a Small Construction Company in guanajuato,Mexico

在线全文

学校读者我要写书评

暂无评论

Chinese Business Review 2018年第5期17卷 209-222页

作者： María Guadalupe Arredondo-Hidalgo Diana Del Consuelo Caldera-González Gerardo Alvarez-Valadez Universidad de guanajuato GuanajuatoMéxico Universidad Iberoamericana León GuanajuatoMéxico

Nowadays internationalization is no longer a luxury for companies and becomes a necessity in order to survive in the market and ensure its durability over time.This justifies the structure of a internationalization plan(IP)for a small company(SEC),in order to modify its value curve against the competition and guarantee a sustained growth development in new markets.This paper presents a strategic analysis of a small construction company dedicated to the elaboration of finishes for walls,floors,and concrete architecture.A situational analysis was carried out to see what would be the most appropriate international strategy for the company.Tools,such as:(a)SWOT(strengths,weaknesses,opportunities,threats)Analysis,(b)PEST(political,economic,social,and technological)Analysis,(c)Internal Factors Evaluation Matrix(IFE),and(d)External Factors Evaluation Matrix(EFE Assessment Matrix),were used to identify the current standing of the SEC.The canvas model and the competitive profile matrix were used to make the connection with the strategic position of the SEC against the desire of internationalization.Likewise,an analysis of the external factors was carried out showing a significant growth of 4.6%in the specialized sub-sector,as well as a tense business landscape driven by the political situation between Mexico and the United States.

关键词： small enterprise strategies internationalization

Root Sprouts of Domesticated Phaseolus coccineus L. Overwinter Plants and the Environment at Its Collection Sites

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Ecology 2024年第5期14卷 508-521页

作者： Ma. Luisa Patricia Vargas-Vázquez Jorge Alberto Acosta-Gallegos Fabián Islas-Gutiérrez Enrique Buendía-Rodríguez Campo Experimental Valle de Mé xico Instituto Nacional de Investigaciones Forestales Agr&#237colas y Pecuarias Texcoco Mexico Campo Experimental Bají o Instituto Nacional de Investigaciones Forestales Agr&#237colas y Pecuarias Guanajuato M&#233xico

Buds emerge from the roots of domesticated runner bean plants (Phaseolus coccineus L.) as sprouts and give the crop its persistence. This particularity of the species seems to be associated with the environment where the species was cultivated during long time. Data on regrowth traits were recorded on 70 accessions of domesticated P. coccineus after overwintering at a site in the central highlands of Mexico. The characteristics recorded included fresh weight of vegetative regrowth, root length, root crown diameter, and diameter of the main root. Most accessions that sprout the following spring, after the grain harvest of the previous year, come from temperate and semi-cold sites with cambisol and andosol soils in mixed Quercus pine forest and high mountain fir trees. Those that do not sprout are from sites of semiarid temperate climate, haplic phaeozem soil in shrub grasslands with deciduous broadleaved trees, and semiwarm subhumid climate, eutrophic regosol soil in deciduous broadleaved forest. Two types of roots were differentiated: branched and thickened taproots, also associated with a different climate, and the type of soil of the collection sites.

关键词： P. coccineus Distribution Vegetation-Environment Interactions Drought-Alternative Species Root-Regrowth

Social spatial changes： Booster for a new regional policy——The event of Silao and Romita counties in guanajuato Mexico

在线全文

学校读者我要写书评

暂无评论

Chinese Business Review 2009年第1期8卷 31-36页

作者： Susana Suarez Paniagua Division of Social Sciences Campus Leon Guanajuato University Guanajuato 37170 Mexico

Distribution and Relation of Primes with Tesla Numbers 3, 6, and 9

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Applied Mathematics and Physics 2024年第4期12卷 1021-1027页

作者： Javier Mendoza-Navarrete Huetzin Perez Ismael Ojeda Victor Verdugo Gabriel Luna Sandoval Ricardo Jimenez Garcia Jaime Alvarez Departametno de Matemá ticas CBTis 256 DGETI Cabo San Lucas M&#233xico DCI Departamento de Fisica Mé dica Universidad de Guanajuato Leon M&#233xico Divisió n de Ingenieria en Sistemas Computacionales Tecnol&#243gico Nacional de M&#233xico ITES Los Cabos Cabo San Lucas M&#233xico Departamento de Ingenieria Industrial en Manufactura Universidad Estatal de Sonora Navojoa M&#233xico Departamento de Elé ctrica-Electr&#243nica Tecnol&#243gico Nacional de M&#233xico Campus Mexicali Mexicali M&#233xico guanajuato M&#233xico

This work presents a different approach to twin primes, an approach from the perspective of the Tesla numbers and gives a refresh and new observation of twin primes that could lead us to an answer to the Twin Prime Conjecture problem. We expose a peculiar relation between twin primes and the generation of prime numbers with Tesla numbers. Tesla numbers seem to be present in so many domains like time, vibration and frequency [1], and the space between twin primes is not the exception. Let us say that twin primes are more than just prime numbers plus 2 or minus 2, and Tesla numbers are more involved with twin primes than we think, and hopefully, this approach give us a better understanding of the distribution of the twin pairs.

关键词： Tesla Numbers Prime Number Twin Prime Numbers Twin Pair

Effect of psychological stress on gastric motility assessed by electrical bio-impedance

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2012年第36期18卷 5027-5033页

作者： María Raquel Huerta-Franco Miguel Vargas-Luna Juana Berenice Montes-Frausto Ismael Morales-Mata Lorena Ramirez-Padilla Department of Applied Sciences to Work Health Science DivisionUniversity of Guanajuato37320 LeonGuanajuatoMexico Department of Physical Engineering Science and Engineering DivisionUniversity of Guanajuato37150 LeonGuanajuatoMexico

AIM:To evaluate gastric motility using electrical bioimpedance(EBI) and gastric changes as a result of stress induced by psychological tests.METHODS:A group of 57 healthy women,aged 40-60 years,was recruited,and a clinical history and physical examination were performed.The women were free from severe anxiety,chronic or acute stress,severe depression,mental diseases and conditions that affect gastric activity.The women were evaluated under fasting conditions,and using a four-electrode configuration,the gastric signals were obtained through a BIOPAC MP-150 system.The volunteers were evaluated using the following paradigm:basal state,recording during the Stroop Test,intermediate resting period,recording during the Raven Test,and a final resting period.We analyzed the relative areas of the frequency spectrum:A1(1-2 cpm),A2(2-4 cpm),A3(4-8 cpm),and A4(8-12 cpm),as well as the median of area A2 + A3.The data were analyzed by an autoregressive method using a Butterworth filter with MatLab and Origin.Analysis of variance(ANOVA) and Friedman ANOVA(for nonparametric variables) were performed;in addition,pairs of groups were compared using the T dependent and Wilcoxon T tests.RESULTS:The results of the main values of area A2 were not significantly different comparing the five steps of the experimental paradigm.Nevertheless,there was a tendency of this A2 region to decrease during the stress tests,with recuperation at the final resting step.When an extended gastric region was considered(1-4 cpm),significant differences with the psychological stress tests were present(F = 3.85,P = 0.005).The A3 region also showed significant changes when the stress psychological tests were administered(F = 7.25,P < 0.001).These differences were influenced by the changes in the adjacent gastric region of A2.The parameter that we proposed in previous studies for the evaluation of gastric motility by electrical bio-impedance(EBI) was the median of the area under the region from 2 to 8 cpm(A2 + A3).The mean values of these frequencies(median of

关键词：胃肠蠕动心理应激生物电阻抗影响评估巴特沃斯滤波器压力测试心理测试 MATLAB

Recyclable Fe_(3)O_(4)@Polydopamine(PDA) nanofluids for highly efficient solar evaporation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2022年第1期7卷 35-42页

作者： Qingmiao Wang Yi Qin Feifei Jia Shaoxian Song Yanmei Li Hubei Key Laboratory of Mineral Resources Processing and Environment Wuhan University of TechnologyWuhanHubei Province430070China Department of Mines Metallurgy and Geology EngineeringUniversity of GuanajuatoGuanajuato36000Mexico School of Resources and Environmental Engineering Wuhan University of TechnologyWuhanHubei Province430070China

Volumetric solar evaporations by using light-absorbing nanoparticles suspended in liquids(nanofluids)as solar absorbers have been widely regarded as one of the promising solutions for clean water production because of its high efficiency and low capital cost compared to traditional solar distillation systems.Nevertheless,previous solar evaporation systems usually required highly concentrated solar irradiation and high capital cost,limiting the practical application on a large scale.Herein,for the first time in this work,polydopamine(PDA)-capped nano Fe_(3)O_(4)(Fe_(3)O_(4)@PDA)nanofluids were used as solar absorbers in a volumetric system for solar evaporation.The introduction of organic PDA to nano Fe_(3)O_(4)highly contributed to the high light-absorbing capacity of over 85%in wide ranges of 200–2400 nm because of the existence of numerous carbon bonds and pi(π)bonds in PDA.As a result,high evaporation efficiency of 69.93%under low irradiation of 1.0 kW m^(-2)was achieved.Compared to other nanofluids,Fe_(3)O_(4)@PDA nanofluids also provided an advantage in high unit evaporation rates.Moreover,Fe_(3)O_(4)@PDA nanofluids showed excellent reusability and recyclability owing to the preassembled nano Fe_(3)O_(4),which significantly reduced the material consumptions.These results demonstrated that the Fe_(3)O_(4)@PDA nanofluids held great promising application in highly efficient solar evaporation.

关键词： Fe_(3)O_(4)@Polydopamine Nanofluids Volumetric solar evaporation Recyclability

The New Social and Identitary Models of Old People—Deepening the Concept of Successful Ageing

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Advances in Aging Research 2022年第4期11卷 91-97页

作者： Alejandro Klein Oxford Institute of Population Ageing University of Guanajuato Guanajuato Mexico

The concept of ageing society includes the quantitative factor that there will be more and more older people according to population transitions. But, at the same time, qualitative factors such as quality of life, identity changes and the experience of high changes in the subjectivity need to be included alongside these quantitative factors. So, the purpose and significance of the paper indicate that is necessary to ensure structures that can tolerate the new scenarios of this current generation of older people, who seek new life options, renewed emotional perspectives and transgenerational confrontation with traditional models of ageing and grandparenthood.

关键词： Old People Subjectivity Experimentation Identity Quality

Gut microbiota:a potential therapeutic target for Parkinson's disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2021年第2期16卷 287-288页

作者： JoséFidel Baizabal-Carvallo Department of Science and Engineering University of GuanajuatoGuanajuatoMéxico

Parkinson's disease(PD)is a neurodegenerative disorder characterized by accumulation ofα-synuclein in neurons of the central nervous system(CNS).The pathogenesis of PD is complex and only partially understood.Initial evidence pointed to the basal ganglia as the source of the motor manifestations of PD,and likely the origin of the pathological process.In the last two decades。

关键词： process. therapeutic pathogenesis