bluuebunny/crossref_metadata_2025 huggingface dataset:
Implant-associated cracked teeth: case series
Authors: Rosen Eyal , Goldberger Tomer , Tamse Aviad , Nemcovsky Carlos E. , Breslauer Salmon , Beitlitum Ilan , Tsesis Igor
Published: August 2017

Background

This study presents a series of 18 cases of cracked non-endodontically treated teeth that were diagnosed following the placement of adjacent implant-supported rehabilitation. These findings could suggest a possible cause/related events.

Results

Most of the cases occurred in female patients (61%), over 50 years old (78%, with an average age of 59 years). Nine (50%) of the cracked teeth were molars, 7 (39%) were mandibular premolars, and 2 (11%) were incisor teeth. Most of the cracked teeth (61%) had an amalgam restoration, 50% had deep periodontal pockets, and 78% had vital pulps. In 78% of patients, multiple implants were placed (with an average of 3 implants per patient). The time from implant loading to the diagnosis of a crack was longer than 1 year in 78% of cases.

Conclusions

The most common patient profile found in this series was a woman over 50 years old, having a cracked mandibular premolar tooth, which was diagnosed more than 1 year after reconstruction based on multiple adjacent implants. Additional clinical studies are warranted in order to shed light on this potential complication.
Identifying and Managing Undue Influence From Family Members in End-of-Life Decisions for Patients With Advanced Cancer
Authors: Baker Francis X. , Gallagher Colleen M.
Published: August 2017

Undue influence from family members of patients with advanced cancer remains a serious ethical problem in end-of-life decision making. Despite the wealth of articles discussing the problem of undue influence, little has been written by way of practical guidance to help clinicians identify and effectively manage situations of undue influence. This article briefly lays out how to identify and manage situations of undue influence sensitively and effectively. We explain how undue influence may present itself in the clinic and distinguish it from ethically permissible expressions of relational autonomy. In addition, we lay out a process by which any clinician suspecting undue influence may gather additional information and, if necessary, conduct a family meeting to address the undue influence. It is our hope that by providing clinicians at all levels of patient care with such guidance, they will feel empowered to respond to cases of undue influence when they arise.
Effect of Palliative Care on Aggressiveness of End-of-Life Care Among Patients With Advanced Cancer
Authors: Triplett Daniel P. , LeBrett Wendi G. , Bryant Alex K. , Bruggeman Andrew R. , Matsuno Rayna K. , Hwang Lindsay , Boero Isabel J. , Roeland Eric J. , Yeung Heidi N. , Murphy James D.
Published: August 2017

Purpose:

Palliative care’s role in oncology has expanded, but its effect on aggressiveness of care at the end of life has not been characterized at the population level.

Methods:

This matched retrospective cohort study examined the effect of an encounter with palliative care on health-care use at the end of life among 6,580 Medicare beneficiaries with advanced prostate, breast, lung, or colorectal cancer. We compared health-care use before and after palliative care consultation to a matched nonpalliative care cohort.

Results:

The palliative care cohort had higher rates of health-care use in the 30 days before palliative care consultation compared with the nonpalliative cohort, with higher rates of hospitalization (risk ratio [RR], 3.33; 95% CI, 2.87 to 3.85), invasive procedures (RR, 1.75; 95% CI, 1.62 to 1.88), and chemotherapy administration (RR, 1.61; 95% CI, 1.45 to 1.78). The opposite pattern emerged in the interval from palliative care consultation through death, where the palliative care cohort had lower rates of hospitalization (RR, 0.53; 95% CI, 0.44-0.65), invasive procedures (RR, 0.52; 95% CI, 0.45 to 0.59), and chemotherapy administration (RR, 0.46; 95% CI, 0.39 to 0.53). Patients with earlier palliative care consultation in their disease course had larger absolute reductions in health-care use compared with those with palliative care consultation closer to the end of life.

Conclusion:

This population-based study found that palliative care substantially decreased health-care use among Medicare beneficiaries with advanced cancer. Given the increasing number of elderly patients with advanced cancer, this study emphasizes the importance of early integration of palliative care alongside standard oncologic care.
Cytoskeletal variations in an asymmetric cell division support diversity in nematode sperm size and sex ratios
Authors: Winter Ethan S. , Schwarz Anna , Fabig Gunar , Feldman Jessica L. , Pires-daSilva André , Müller-Reichert Thomas , Sadler Penny L. , Shakes Diane C.
Published: August 2017

Asymmetric partitioning is an essential component of many developmental processes. As spermatogenesis concludes, sperm are streamlined by discarding unnecessary cellular components into cellular wastebags called residual bodies (RBs). During nematode spermatogenesis, this asymmetric partitioning event occurs shortly after anaphase II, and both microtubules and actin partition into a central RB. Here, we use fluorescence and transmission electron microscopy to elucidate and compare the intermediate steps of RB formation in Caenorhabditis elegans, Rhabditis sp. SB347 (recently named Auanema rhodensis) and related nematodes. In all cases, intact microtubules reorganize and move from centrosomal to non-centrosomal sites at the RB-sperm boundary whereas actin reorganizes through cortical ring expansion and clearance from the poles. However, in species with tiny spermatocytes, these cytoskeletal changes are restricted to one pole. Consequently, partitioning yields one functional sperm with the X-bearing chromosome complement and an RB with the other chromosome set. Unipolar partitioning may not require an unpaired X, as it also occurs in XX spermatocytes. Instead, constraints related to spermatocyte downsizing may have contributed to the evolution of a sperm cell equivalent to female polar bodies.
Evaluation of mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH) in pure mineral hydrocarbon-based cosmetics and cosmetic raw materials using 1H NMR spectroscopy
Authors: Lachenmeier Dirk W. , Mildau Gerd , Rullmann Anke , Marx Gerhard , Walch Stephan G. , Hartwig Andrea , Kuballa Thomas
Published: August 2017

Mineral hydrocarbons consist of two fractions, mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH). MOAH is a potential public health hazard because it may include carcinogenic polycyclic compounds. In the present study, 400 MHz nuclear magnetic resonance (NMR) spectroscopy was introduced, in the context of official controls, to measure MOSH and MOAH in raw materials or pure mineral hydrocarbon final products (cosmetics and medicinal products). Quantitative determination (qNMR) has been established using the ERETIC methodology (electronic reference to access in vivo concentrations) based on the PULCON principle (pulse length based concentration determination). Various mineral hydrocarbons (e.g., white oils, paraffins or petroleum jelly) were dissolved in deuterated chloroform. The ERETIC factor was established using a quantification reference sample containing ethylbenzene and tetrachloronitrobenzene. The following spectral regions were integrated: MOSH δ 3.0 – 0.2 ppm and MOAH δ 9.2 - 6.5, excluding solvent signals. Validation showed a sufficient precision of the method with a coefficient of variation <6% and a limit of detection <0.1 g/100 g. The applicability of the method was proven by analysing 27 authentic samples with MOSH and MOAH contents in the range of 90-109 g/100 g and 0.02-1.10 g/100 g, respectively. It is important to distinguish this new NMR-approach from the hyphenated liquid chromatography-gas chromatography methodology previously used to characterize MOSH/MOAH amounts in cosmetic products. For mineral hydrocarbon raw materials or pure mineral hydrocarbon-based cosmetic products, NMR delivers higher specificity without any sample preparation besides dilution. Our sample survey shows that previous methods may have overestimated the MOAH amount in mineral oil products and opens new paths to characterize this fraction. Therefore, the developed method can be applied for routine monitoring of consumer products aiming to minimize public health risks.
Protein nano-cages: Novel carriers for optimized targeted remedy
Authors: Roudi Negar Etehad , Saraygord-Afshari Neda , Hemmaty Maryam
Published: August 2017

Since 1980, when the idea of drug-delivery was proposed, various drug-carriers have been developed, including DNA, proteins, liposomes and several other polymer cages, consisting of many well established natural and synthetic nano-particles. All these drug-carriers can self-assemble in the body and can be manipulated for safer delivery into target tissues. By definition, nano-scale drug delivery systems encompass any structure (either cage or particle) in the form of solid colloids, which range in size from 10 nm to 100 nm. Today, optimization of these nano drug-vehicles is a topic in many research centers. Researchers are trying to improve the carrier’s solubility and their loading capacity and also wish to increase the half-life of drug delivery cargos in target tissues. Efforts in recent years have led to the introduction of novel protein nano-cages composed of multiple protein subunits, which self-assemble within a superfine and precise format. Science their introduction these promising structure have shown many unique characteristics, including low toxicity, bio-system compatibility, minor immunogenicity, high solubility, and a relatively easy production in large scale. Herein, we review and discuss the recently developed protein nano-carriers that are used as drug cargos for targeted delivery and/or diagnostic tools.
Impact of trichiasis surgery on daily living: A longitudinal study in Ethiopia
Authors: Habtamu Esmael , Wondie Tariku , Aweke Sintayehu , Tadesse Zerihun , Zerihun Mulat , Melak Berhanu , Gashaw Bizuayehu , Callahan Kelly , Emerson Paul M. , Bailey Robin L. , Mabey David C.W. , Rajak Saul N. , Kuper Hannah , Polack Sarah , Macleod David , Weiss Helen A. , Burton Matthew J.
Published: August 2017

Background: Trachomatous trichiasis (TT) may lead to disability, impeding productive activities, resulting in loss of income. This study was conducted to determine if trichiasis surgery improves participation in productive and leisure activities, and ability to perform activities without difficulty or assistance.

Methods: We recruited 1000 adults with trichiasis (cases) and 200 comparison participants, matched to every fifth trichiasis case on age (+/- two years), sex and location. The ‘Stylised Activity List’ tool, developed for the World Bank Living Standard Measurement Survey, was adapted to collect data on activity in the last week (participation in activity, difficulty with activity, requirement of assistance for activity), at baseline and 12 months later. All trichiasis cases received trichiasis surgery at baseline. Random effect logistic regression was used to compare cases and comparison participants.

Results: There was strong evidence that trichiasis surgery substantially improves the ability of trichiasis cases to perform all the productive and leisure activities investigated without difficulty, with large increases in processing agricultural products, 21.1% to 87.0% (p<0.0001), farming, 19.1% to 82.4% (p<0.0001), and fetching wood, 25.3% to 86.0% (p<0.0001). Similarly, there was a significant increase in the proportion of cases who could perform activities without assistance, with the largest increases in animal rearing 54.2% to 92.0% (p<0.0001) and farming 73.2% to 96.4% (p<0.0001). There was no change in the proportion of comparison participants performing activities without difficulty or assistance. The change in most of the activities in cases was independent of visual acuity improvement and recurrent TT at 12 months. One year after trichiasis surgery, the proportion of cases reporting ocular pain reduced from 98.9% to 33.7% (p<0.0001).

Conclusions: Eyelid surgery for TT improves functional capabilities regardless of vision gains. These data lend strong support to the view that TT surgery improves function and contributes to improved household income and wealth.
Methyl donor deficient diets cause distinct alterations in lipid metabolism but are poorly representative of human NAFLD
Authors: Lyall Marcus J. , Cartier Jessy , Richards James A , Cobice Diego , Thomson John P , Meehan Richard R , Anderton Stephen M , Drake Amanda J
Published: August 2017

Background: Non-alcoholic fatty liver disease (NAFLD) is a global health issue. Dietary methyl donor restriction is used to induce a NAFLD/non-alcoholic steatohepatitis (NASH) phenotype in rodents, however the extent to which this model reflects human NAFLD remains incompletely understood. To address this, we undertook hepatic transcriptional profiling of methyl donor restricted rodents and compared these to published human NAFLD datasets.             

Methods: Adult C57BL/6J mice were maintained on control, choline deficient (CDD) or methionine/choline deficient (MCDD) diets for four weeks; the effects on methyl donor and lipid biology were investigated by bioinformatic analysis of hepatic gene expression profiles followed by a cross-species comparison with human expression data of all stages of NAFLD.

Results: Compared to controls, expression of the very low density lipoprotein (VLDL) packaging carboxylesterases (Ces1d, Ces1f, Ces3b) and the NAFLD risk allele Pnpla3 were suppressed in MCDD; with Pnpla3 and the liver predominant Ces isoform, Ces3b, also suppressed in CDD. With respect to 1-carbon metabolism, down-regulation of Chka, Chkb, Pcty1a, Gnmt and Ahcy with concurrent upregulation of Mat2a suggests a drive to maintain S-adenosylmethionine levels. There was minimal similarity between global gene expression patterns in either dietary intervention and any stage of human NAFLD, however some common transcriptomic changes in inflammatory, fibrotic and proliferative mediators were identified in MCDD, NASH and HCC.

Conclusions: This study suggests suppression of VLDL assembly machinery may contribute to hepatic lipid accumulation in these models, but that CDD and MCDD rodent diets are minimally representative of human NAFLD at the transcriptional level.
Bone mineral density and risk of type 2 diabetes and coronary heart disease: A Mendelian randomization study
Authors: Gan Wei , Clarke Robert J. , Mahajan Anubha , Kulohoma Benard , Kitajima Hidetoshi , Robertson Neil R. , Rayner N. William , Walters Robin G. , Holmes Michael V. , Chen Zhengming , McCarthy Mark I.
Published: August 2017

Background: Observational studies have demonstrated that increased bone mineral density is associated with a higher risk of type 2 diabetes (T2D), but the relationship with risk of coronary heart disease (CHD) is less clear. Moreover, substantial uncertainty remains about the causal relevance of increased bone mineral density for T2D and CHD, which can be assessed by Mendelian randomisation studies. 

Methods: We identified 235 independent single nucleotide polymorphisms (SNPs) associated at p<5×10-8 with estimated heel bone mineral density (eBMD) in 116,501 individuals from the UK Biobank study, accounting for 13.9% of eBMD variance. For each eBMD-associated SNP, we extracted effect estimates from the largest available GWAS studies for T2D (DIAGRAM: n=26,676 T2D cases and 132,532 controls) and CHD (CARDIoGRAMplusC4D: n=60,801 CHD cases and 123,504 controls). A two-sample design using several Mendelian randomization approaches was used to investigate the causal relevance of eBMD for risk of T2D and CHD. In addition, we explored the relationship of eBMD, instrumented by the 235 SNPs, on 12 cardiovascular and metabolic risk factors. Finally, we conducted Mendelian randomization analysis in the reverse direction to investigate reverse causality.

Results: Each one standard deviation increase in genetically instrumented eBMD (equivalent to 0.14 g/cm2) was associated with an 8% higher risk of T2D (odds ratio [OR] 1.08; 95% confidence interval [CI]: 1.02 to 1.14; p=0.012) and 5% higher risk of CHD (OR 1.05; 95%CI: 1.00 to 1.10; p=0.034). Consistent results were obtained in sensitivity analyses using several different Mendelian randomization approaches. Equivalent increases in eBMD were also associated with lower plasma levels of HDL-cholesterol and increased insulin resistance. Mendelian randomization in the reverse direction using 94 T2D SNPs or 52 CHD SNPs showed no evidence of reverse causality with eBMD.

Conclusions: These findings suggest a causal relationship between elevated bone mineral density with risks of both T2D and CHD.
STR-Oriented Theory of Audit
Authors: Арабян  , Arabyan Knarik
Published: August 2017

In this article, the author, based on the role of auditing in modern conditions as a regulator of socio-economic equilibrium and the absence of a full-fl edged and integral scientifi c audit theory today, off ers his concept of the scientific theory of audit, namely STR-oriented audit theory and examines in detail its main elements.
Constructive Analysis of Educational and Professional Standards on the «Accounting, Analysis and Audit» Profile
Authors: Миславская  , Mislavskaya N.
Published: August 2017

In this article, an attempt is made to explain the nature of the emergence of problems in the field of training economists specializing in accounting and auditing. Th e author’s opinion on the fundamental impossibility of fulfilling the requirements of modern state educational standards is completely out of the ordinary and is based on the research of both domestic and foreign colleagues of psychologists, sociologists and economists.
Positive outcomes for homeless patients in UCLH Pathway programme
Authors: Wyatt Lara
Published: August 2017

Pathway is the leading homeless healthcare charity in the UK. Established in 2009 after an audit of homeless patient admissions data, a model for holistic management was developed with the aim of improving both health and social outcomes for this vulnerable group. There are now 10 teams in hospitals across the country, where in-hospital GPs and nurses hold multidisciplinary meetings to address the housing, financial, social and health issues of patients. We conducted an audit of Pathway patients between November 2014 and November 2015 to determine if patients experienced any reduction in A&E presentation, admission or bed days following Pathway care, and explored the factors that may have contributed to this. Reductions between 38–78% were seen in these parameters, where long-distance repatriation, food and clothing donation and accommodation arrangements were likely to have played a role. This article describes some of the actions undertaken by the UCLH Pathway team to ensure comprehensive and individualised care was provided to a truly heterogeneous population, with insight from Medical Director Dr Nigel Hewett. Although funding for such models of care may be inconsistent nationwide, this article aims to provide ideas and inspiration for the management of this complex and disadvantaged population.
Research roundup: August 2017
Authors: Odd Dawn , Lewis Lisa , Brook Judy
Published: August 2017

In this section, a range of brief synopses of recently published articles that may be of interest to health visitors is presented. The aim of this roundup is to provide an overview, rather than a detailed summary, of the research papers selected. Should you wish to look at any of the papers in more detail, a full reference is provided.
Getting Out There: Community Support Services for People With Intellectual and Developmental Disabilities in Medicaid HCBS Waivers
Authors: Friedman Carli , Spassiani Natasha A.
Published: August 2017

Despite an increased number of community-based services, people with intellectual and developmental disabilities (IDD) continue to struggle with meaningful community participation and often feel they are not valued community members. This study examined how community support services, which support physical placement and community integration, were allocated in Medicaid 1915(c) HCBS waivers, the largest provider of long-term services and supports for people with IDD in the United States. Community support services totaled $447.5 million of projected funding in fiscal year 2014. While community transition services funded expenses required to establish a basic household for the initial transition, community integration services promoted a successful community placement by utilizing natural supports and developing skills necessary to maintain community integration.
Microphytoplankton biomass and trophic state of the Estuarine Region of São Francisco River (northeastern Brazil)
Authors: Melo-Magalhães Enaide Marinho , Moura Ariadne do Nascimento , Medeiros Paulo Ricardo Petter , Koening Maria Luise
Published: August 2017

One of the most serious problems that affect estuaries is the excessive enrichment of nutrients, especially nitrogen and phosphorus compounds that result in increased productivity. Studies to evaluate the trophic conditions of the São Francisco River estuary were conducted at four stations in the rainy (July/ 2006 ) and dry (January/2007) season in neap and spring tides, during high tide and low tide. Microphytoplankton was collected using plankton nets with mesh size of 45mm and the samples for analysis of nutrients and Phytoplankton biomass (chlorophyll a) were obtained from the sub-surface layer with wide-mouthed plastic bottles. The waters of this ecosystem showed salinities ranging from an oligohaline to a limnetic regime, alkaline pH and water clarity ranging between 1.00m and 2.60m. The concentrations of dissolved nutrients varied considerably, being highest during the dry season period. The Microphytoplankton was composed of 176 taxa, mainly distributed among the Chlorophyta, Charophyta and Bacillariophyta. Phytoplankton biomass (chlorophyll a) showed no significant differences between seasons, tides and tidal regimes, however the density (Cel.L-1) was significantly higher in the dry season. Values of a TSI showed oligotrophic conditions in the four stations and in the two periods analyzed. In the dry season there was a higher cell density and increased levels of dissolved nutrients with the exception of nitrate that was considered higher in the rainy season. The Microphytoplankton species are characteristic of waters of low to moderate trophic level and the TSI indicated a predominance of oligotrophic conditions in the two seasons in the study area.Keywords: chlorophyll a, estuary,  hydrology, phytoplankton, seasonality
Las dependencias regionales de los asentamientos humanos localizados en el parque nacional "Lagunas de Chacahua", Oaxaca
Authors: Huerta Marco Antonio , Propin Frejomil Enrique
Published: August 2017

Este trabajo tiene como objetivo revelar la dinámica regional de los asentamientos humanos localizados en el parque nacional "Lagunas de Chacahua", derivada de actividades de prioritaria necesidad poblacional. En una primera parte se presentan las principales posturas teórico-metodológicas asumidas en la investigación. En la segunda, se identifica una jerarquía de cuatro asentamientos humanos de interés, presentes en el territorio, que permite apreciar la importancia relativa de éstos dentro del parque nacional. El contenido final se desarrolla sobre la base de la correlación espacial entre la jerarquía revelada y las dependencias regionales de funciones esenciales de los residentes locales como la asistencia médica, el abasto alimentarlo y la comercialización de la producción pesquera.
Entidades de la Zona Metropolitana de la Ciudad de México propensas a la contaminación de agua subterránea
Authors: Soto Galera Ernesto , Mazari Hillari Marisa , Bojórquez Tapia Luis A.
Published: August 2017

El 70% del agua que se utiliza en la Zona Metropolitana de la Ciudad de México (ZMCM) destinado al uso doméstico, industrial y agrícola, proviene de los sistemas de acuíferos de la Cuenca de México, por lo que es importante conocer las fuentes de contaminación que pueden influir en la calidad del recurso. En este estudio se realiza un análisis espacial, a nivel de delegación y municipio, de las principales fuentes contaminantes del agua subterránea, con el objeto de identificar zonas propensas a la contaminación. Se tomaron como fuentes contaminantes la Industria, los confinamientos de residuos sólidos, los depósitos de combustible, el sistema de drenaje, las gasolineras, los pozos de extracción y la zona urbanizada. La distribución de las fuentes contaminantes, aunada a las zonas geológicas principales que subyacen a la ciudad, permitió determinar que el centro de la ZMCM presentaba la mayor concentración de fuentes contaminantes, mientras que la mayor propensión a la contaminación para el sistema de acuíferos se encontró hacia el sur-poniente y norte de la ZMCM.
Los niveles de asimilación económica de la región costera de México
Authors: Juárez Gutiérrez María Del Carmen
Published: August 2017

La presente investigación analiza la ocupación que la sociedad hace del espacio a través de los niveles de asimilación económica de los municipios costeros de México. En una primera parte, se abordan las posturas teóricas y los criterios cuantitativos, a través de la distribución de la población y de las actividades económicas; en la segunda se presentan las diferencias regionales de los niveles de asimilación con una tipología de espacios geográficos que correlaciona fenómenos humanos esenciales.
La condición actual de los recursos forestales en México: resultados del Inventario Forestal Nacional 2000
Authors: Palacio-Prieto José Luis , Bocco Gerardo , Velázquez Alejandro
Published: August 2017

A partir de fines de 1 999, la SEMARNAP decidió desarrollar la primera fase del inventario forestal nacional de México. A tal efecto, el Instituto de Geografía de la UNAM presentó en febrero de 2000 una propuesta técnica que fue adjudicada por la SEMARNAP. La propuesta del instituto de Geografía respondió al interés de SEMARNAP de elaborar una estrategia que rebasara los alcances de los inventarios forestales tradicionales, e incorporara una perspectiva ecológica complementaria. Se evaluaron 194 198 411 ha (1 941 984 km2, porción continental del territorio nacional). De esta superficie, los "Matorrales" ocupan la mayor proporción con casi un 30%; le siguen en orden descendiente de superficie los "Bosques", "Cultivos", "Pastizales" y "Selvas" con superficies entre 15 y 17% del total. Las otras tres formaciones ocupan en conjunto alrededor del 5% de la superficie total del país (véase gráfica más abajo). Los resultados obtenidos se plasmaron en los siguientes productos: 121 mapas de cubierta vegetal y uso del suelo, a escala 1:250 000, y 1 21 espaciomapas, ambos en formato digital e impresos. Evaluación cuantitativa de la calidad de la cartografía mediante fotografía digital detallada. Datos de superficies forestales y otras cubiertas a varios niveles de agregación. Diccionario de datos, glosario y metadatos. Página en la INTERNET donde se presentan el informe, los anexos y los productos obtenidos. Esta investigación permitirá a muy corto plazo hacer estimaciones confiables sobre las tasas de deforestación, ya que las categorías mapeadas son compatibles con los sistemas de clasificación de mayor uso en el país.
Estratificación de la información en el procesamiento digital de imágenes de satélite aplicado a la cartografía de los bosques de Pinus cembroides
Authors: Treviño Garza Eduardo Javier
Published: August 2017

Los bosques de Pinus cembroides constituyen un valioso recurso para los habitantes de las zonas áridas en el noreste de México. En este trabajo se presenta una propuesta metodológica para determinar la condición de los bosques de pino piñonero mediante la utilización de imágenes digitales de satélite, el apoyo en la estratificación de la información y la aplicación de un sistema de información geográfica (SIG). En la elaboración de la cartografía de estos bosques se integró la información contenida en mapas de uso del suelo y vegetación al procesamiento digital de imágenes de satélite. Dicha información, almacenada en un SIG, a manera de una cubierta digital, fue manipulada para derivar otra conteniendo sólo la información de interés, con la que se creó una "máscara" sobre la imagen de satélite, procesada posteriormente para obtener un mapa donde se representaron cinco clases de densidad de esos bosques De acuerdo con los resultados obtenidos, a los bosques cerrados y densos corresponde un 40% de la superficie estudiada; a los semidensos 45% y al bosque abierto y áreas con suelo desnudo 15%.
La Comisión de Límites de México y el levantamiento de la Iínea divisoria entre México y Estados Unidos, 1849 - 1857
Authors: Tamayo P. de Ham Luz María O. , Moncada Maya José Omar
Published: August 2017

Al concluirse la guerra entre México y Estados Unidos, se hizo necesario trazar la línea fronteriza entre los dos países. Los tratados de Guadalupe-Hidalgo (1848) y de La Mesilla o Gadsden (1853) especificaron estos límites. Cada país nombró una comisión que trabajó de manera simultánea, y acordó la colocación de los monumentos que definieron esta línea en el terreno. La comisión mexicana estaba integrada por los Colegios de Minería y Militar. La diferencia en cuanto a condiciones de trabajo, instrumentos y apoyo del gobierno era muy diferente entre las dos comisiones, sin embargo, la buena preparación profesional de los ingenieros mexicanos les valió el respeto y reconocimiento de los estadounidenses. La comisión trabajó en el campo durante los seis primeros años, se hicieron el reconocimiento del terreno, la determinación de los puntos sobre la línea por métodos astronómicos y topográficos y la monumentación. También elaboró croquis y mapas de campo que fueron la base de la cartografía realizada durante el último año. El objetivo de este trabajo es mostrar los logros de esta comisión.
Alteración del ciclo hidrológico en la parte baja de la cuenca alta del río Lerma por la transferencia de agua a la Ciudad de México
Authors: Maderey Rascón Laura Elena , Jiménez Román Arturo
Published: August 2017

La parte baja de la cuenca alta del rio Lerma ha sido seriamente afectada por la utilización irracional que se hizo del recurso agua para su transferencia a la cuenca de México con el fin de complementar el abastecimiento a la Ciudad de México. Dicha afectación ha traído consigo una clara transformación física de la cuenca. En este trabajo se estudia la alteración causada en la hidroclimatologia en la parte baja de la cuenca alta del río Lerma mediante el análisis de información tanto meteorológica como hidrométrica que, o bien forma parte del ciclo hidrológico o lo afecta de manera indirecta. El análisis se hizo a través de la comparación de las tendencias que muestran los parámetros meteorológicos, con períodos de registros comprendidos entre 1920 y 1985, abarcando información anterior a la transformación del área de estudio hasta aproximadamente treinta años después, y con datos hidrométricos examinados en dos lapsos, de 1945 a 1950 y de 1951 a 1980. También se calculó el volumen de agua disponible en la cuenca alta del rio Lerma, utilizando la precipitación media anual, la evaporación y el índice de aridez de Köppen registrados en la cuenca, con el objeto de conocer si ha habido una extracción de agua superior a la que la cuenca ofrece, sin que su medio ambiente sea alterado. Los resultados de la investigación demuestran que, aunque poco pronunciada, existe una alteración de los elementos meteorológicos tratados, las temperaturas medias, máximas y mínimas; las precipitaciones máxima, mínima y media anual, la evaporación potencial y la real, y una evidente modificación en la cantidad de agua de las lagunas que daban origen al rio Lerma, así como una extracción de agua que liego a sobrepasar el volumen de agua disponible de la cuenca alta de este río.
La ocupación laboral femenina en dos ciudades fronterizas: Tijuana y Matamoros
Authors: Escamilla Herrera Irma
Published: August 2017

El trabajo analiza el comportamiento de la ocupación laboral de las mujeres en las ciudades fronterizas de Tijuana y Matamoros, en 1937 y 1996. Las actuales condiciones de producción están siendo modificadas, experimentándose un cambio sectorial en algunas ramas de producción hacia una masculinización de la mano de obra, donde la feminización había prevalecido en la fase inicial del establecimiento de las maquilas: comienza una diferenciación regional donde Tijuana emplea cada vez más a hombres. De la caracterización de la ocupación laboral femenina se derivan cambios en patrones culturales y sociales: un predominio de mujeres separadas y divorciadas en Tijuana. Los niveles de instrucción también se han modificado respecto al número de hijos, ya que al no tener hijos o uno o dos hijos aumentan sus niveles de educación, mínimo al nivel medio, en ambas ciudades. Una diferenciación a resaltar son los niveles de ingresos, Matamoros ha aumentado hasta tres veces el salario mínimo a diferencia de Tijuana, se explica porque en aquélla la participación de la clase trabajadora ha condicionado mejores formas de organización grupal, sindical y clase, que ha permitido mejoras, aunque en niveles reducidos, de captación de ingresos, menor rotación en el empleo, y mayor estabilidad laboral.
El enfoque de paisaje en el manejo forestal de la comunidad indígena de Nuevo San Juan Parangaricutiro, Michoacán, México
Authors: Fregoso Alejandra , Velázquez Alejandro , Bocco Gerardo
Published: August 2017

Este trabajo compara, cuantitativamente, las ventajas y limitaciones entre los enfoques de paisaje y forestal. Los resultados intentan satisfacer la demanda tanto productiva (aprovechamiento forestal) como ambiental (conservación) que se establece sobre el mismo recurso. Dado que el bosque es el elemento común, se compararon las formas de estudio de ambos enfoques. El enfoque de paisaje se basó en la escuela europea de descripción y clasificación de la información. Para estos fines se realizaron 177 relevés o levantamientos bajo un diseño estratificado al azar. De aquí se reconocieron 13 comunidades vegetales y sus especies características. El enfoque forestal siguió un diseño estratificado sistemático de muestreo. Se reconocieron 136 rodales que agrupan a 1 271 subrodales (unidades de manejo forestal). Esto incluyó el muestreo de 4 662 sitios de ci. 1 000 m2. La comparación se presenta en tres contextos: alcances florísticos, dinámica del bosque y contexto espacial. El enfoque paisajístico incluyó 609 especies de plantas vasculares, mientras que el forestal sólo 11 (las de importancia maderable). La dinámica del bosque está bien representada en las comunidades definidas por el enfoque paisajístico, a diferencia del enfoque forestal, que sólo documenta la dinámica de las poblaciones seleccionadas. En el contexto espacial se logró integrar ambos enfoques para un porcentaje substancial de la región (80%). El resto de los subrodales presenta condiciones tan heterogéneas, que no permitieron la vinculación entre ellos. Se recomienda generar una estrategia de estudio complementaria entre ambos enfoques, ya que los dos aportan aspectos relevantes para fines de uso y conservación.
Caracterización óptica de la laguna costera de Coyuca de Benítez
Authors: Aguirre Gómez Raúl
Published: August 2017

En este trabajo se muestra la caracterización óptica de la laguna costera de Coyuca de Benítez en los períodos de agosto de 1992 y diciembre del mismo año. Esta caracterización se logró mediante la aplicación de un espectroradiómetro, en el que se midió la reflectancia volumétrica R(?) y el coeficiente de atenuación difusa Kd(? z), desde una pequeña embarcación Se hallaron zonas con diferencias ópticas mediante un análisis estadístico de cúmulos. Las diferentes zonas ópticas determinadas con esta metodología corresponden a regiones bio-ópticas claramente delimitadas.
ASPECTOS CLIMATICOS DE ALMACENAMIENTO DE GRANOS EN MEXICO
Authors: Jáuregui Ostos Ernesto
Published: August 2017

En el presente trabajo se hace un intento de delimitar las zonas del país con relación al deterioro potencial de granos almacenados, utilizando un Índice propuesto por Brooks.En las planicies costeras y tierras bajas de México el deterioro potencial (al sur del trópico) es moderado o alto. En la altiplanicie central y el noroeste semiárido el deterioro potencial es bajo la mayor parte del año. En estas dos últimas regiones de bajo Índice se encuentran los 2/3 de los graneros (a1macenes) del país.
LA DISTRIBUCION ESPACIAL Y TEMPORAL DEL MONOXIDO DE CARBONO EN LA CIUDAD DE MEXICO, Y SU RELACION CON ALGUNOS FACTORES METEOROLOGICOS
Authors: Ernesto Jáuregui 0stos Ernesto
Published: August 2017

Se examinan las variaciones espaciales y temporales del CO en la Ciudad de México, en los años de 1976 y 1978. Los niveles de concentración de C0 son máximos en el centro del área urbana y decrecen a una cuarta parte en los suburbios. Durante el dí­a se presentan dos valores máximos de CO que coinciden con los picos de mayor actividad vehicular.La calidad del aire medida por este contaminante resultó en general satisfactoria, ya que sólo en diciembre del año 1978 se excedió la norma en un 20% del tiempo, en el sector del centro de la ciudad.
Representaciones y perspectivas prácticas sobre las finalidades de la enseñanza de la historia en los/las estudiantes del profesorado
Authors: Jara Miguel Angel , Salto Víctor , Értola Fabiana
Published: August 2017

En el presente artículo abordamos las representaciones y perspectivas prácticas que subyacen en estudiantes del profesorado (de la Universidad Nacional del Comahue) sobre las finalidades de la enseñanza de la historia. Se ofrecen resultados obtenidos a partir de la realización de un cuestionario que permitió indagar sobre el lugar que ocupa la didáctica de la historia en su formación inicial y sobre las intenciones que orientan dicha formación en relación a la enseñanza de la historia. Sondear en las finalidades que subyacen en los/las estudiantes del profesorado consideramos que es un aspecto clave para contribuir a su formación inicial y reflexionar sobre el lugar que ocupamos en la formación de futuros formadores. En este sentido, se identifican algunos núcleos de sentido que permiten observar no solo qué nos dicen sino cómo piensan sobre la enseñanza de la historia en su formación inicial.
Geothermal modelling and its application to hydrocarbon generation from agbada formation. a case study of USANi field, Niger delta basin, Nigeria
Authors: Aigbadon Godwin , Okoro Anthony , Akpunonu Elesius , Nimnu Rosemary , Ocheli Azuka
Published: August 2017

The geothermal model was done with the integration of surface. Subsurface temperature's data and formation depth values from suites of well log in the study field. The well comprises Gamma-ray log (GR log), Spontaneous Potential logs (SP log), Resistivity logs, Formationdensity, Neutron log and Sonic log. The suites of welllog within the studied sequences penetrates Agbada and the Benin Formation. The Benin Formation comprises mainly of continental sands, and the Agbada Formation consist of alternating sequence of sand and shales within the study wells. The estimated thickness and temperature values within the study field falls within the range from 1357- 3500m and 101 O C – 120.5 O C with estimated geothermal gradient range of (0.028 - 0.03 O C/100m) in the field. The geo-temperatures results range of 101.60 O C – 119.60 OCat modeled depth of 1357m- 3500m, indicating that the shale sequence at the basal path of the Agbada Formation is thermally matured with sufficient organic matter to generate hydrocarbon in the study field as earlier believe to be immature and cannot generate hydrocarbon. The geothermal model can be applicable to any sedimentary basin in the world. This work is also an important tool in source rock evaluation to compliment petroleum geochemistry and position the hydrocarbon generating window of the study field.
An investigation of prospective science teachers' socio-scientific argumentation processes in terms of metacognition: A causal-comparative study
Authors: Öztürk Ayşe
Published: August 2017

This study attempts to investigate through causal-comparative research whether socio-scientific argumentation processes of prospective science teachers (PSTs) who had high and low socio-scientific argumentation skills differed from each other in terms of metacognition. The research was conducted with a total of 45 PSTs, 24of whom had high socio-scientific argumentation skills, and 21 had low socio-scientific argumentation skills. Data were gathered using qualitative and quantitative methods. Research results indicated that the PSTs with high socio-scientific argumentation skills displayed more metacognitive behaviors when compared to the PSTs with low socio-scientific argumentation skills and that they used more metacognitive strategies with regard to many components such as planning, decision-making, evaluation, monitoring, and organizing. Furthermore, a statistically significant difference was detected between the scores of the PSTs' metacognitive awareness skills in favor of the PSTs with high socio-scientific argumentation skills. These results demonstrated that the two groups with different socio-scientific argumentation skills differed from each other in terms of metacognition and that the PSTs with high socio-scientific argumentation skills were better in regard with metacognition.
A EMANCIPAÇÃO FEMININA NA LITERATURA: UMA LEITURA DE UM PAR DE MEIAS DE SEDA, DE KATE CHOPIN
Authors: Zanatta Deisi Luzia , Burlamaque Fabiane Verardi
Published: August 2017

Este trabalho tem como objetivo principal analisar a prática de transgressão emancipatória da protagonista do conto Um par de meias de seda, da escritora norte-americana Kate Chopin. A metodologia que permeou este estudo se dá por meio de uma pesquisa bibliográfica com abordagem qualitativa. Para tal contribuem como base teórica os postulados Perrot (1991, 1992, 1998, 2008), Auad (2003) e Beauvoir (1949a, 1949b) sobre a condição da mulher ao longo do tempo. A pesquisa evidenciou que Kate Chopin apresenta a condição feminina no século XIX e, ao construir a sua heroína, Sr. Sommers, engendra nela os pensamentos modernos como escritora e mulher à frente de seu tempo, denunciando, assim, as formas de abuso contra a mulher.
CIBERCONTEÚDOS EDUCATIVOS E SUA CONSTRUÇÃO EM REDE
Authors: De Mesquita Ofélia Alencar , Castro Filho José Aires , Santos Junqueira Rodrigues Eduardo
Published: August 2017

Esse texto propõe o conceito de ciberconteúdos educativos a partir de duas análises: uma teórica sobre a cibercultura e a produção de materiais didáticos destinados à educação on-line; e outra a partir dos resultados de um estudo empírico. A pesquisa desenvolveu-se com graduandos e pós-graduandos de um grupo de pesquisa de diferentes áreas do conhecimento, vinculados à Universidade Federal do Ceará – UFC, que planejaram, criaram e analisaram os ciberconteúdos educativos em rede.adotado foi a pesquisa ação. Os resultados desta pesquisa indicam que: a) a ambiência do digital em rede potencializa e faz emergir outros espaços e tempos de construção coletiva de conteúdos educativos, proporcionando fazeres e saberes autorais colaborativos; b) novas redes educativas são tecidas no ciberespaço e amparam a pesquisa, a escrita e a disseminação de linguagens multirreferenciais; c) faz-se necessário articular novas propostas de elaboração de conteúdos educativos.
TELEVISÃO PARA CRIANÇAS: UMA QUESTÃO DE ÉTICA, REGULAMENTAÇÃO E EDUCAÇÃO
Authors: Eleá Ilana
Published: August 2017

Este artigo tem como proposta discutir questões de ética, regulamentação da televisão para crianças e mídia-educação. Parte-se do pressuposto de que o direito à liberdade de expressão e regulamentação não são incompatíveis, mas complementares – e fundamentais para o exercício democrático. O texto apresenta exemplos de regulação pública, auto-regulação e co-regulação de televisão para crianças em contexto principalmente europeu, com destaque para o modelo sueco. Iniciativas para garantir conteúdos considerados de qualidade, assim como ações para evitar que conteúdos potencialmente nocivos possam ser exibidos nas grades de programação pública são apresentados, assim como a importância do enfoque paralelo e contínuo em ações mídia-educativas.
FOTOGRAFIA E EDUCAÇÃO: POSSIBILIDADES NA PRODUÇÃO DE SENTIDOS DOS DISCURSOS VISUAIS
Authors: Pedrosa Stella Maria Peixoto de Azevedo , Figueiredo da Costa Ana Valéria De
Published: August 2017

O presente artigo tem como objetivo central propor reflexões sobre a produção e leitura de imagens, mais especificamente da fotografia, e algumas de suas relações com a educação. O texto apresenta uma breve história da fotografia relacionada à sua popularização discutindo: visão, visualidade e visualização e suas consequências para a produção e leitura de imagens. A partir da fundamentação teórica são apresentadas articulações da fotografia com a educação, sugerindo aspectos a serem estudados e práticas que contribuem para a leitura de fotografias. Na atualidade, a leitura de imagens se mostra fundamental nos processos educacionais, sugerindo estudos que envolvam a questão técnica, bem como a busca de referenciais heurísticos para a interpretação das mensagens contidas nos textos fotográficos.
Association of growth hormone (GH) gene polymorphism with growth and carcass in Sumba Ongole (SO) cattle
Authors: Agung P. P. , Anwar S. , Putra W. P. B. , Zein M. S. A. , Wulandari A. S. , Said S. , Sudiro A.
Published: August 2017

A study was conducted to identify the polymorphism in the intron 3 of the Growth Hormone (GH) gene and also to evaluate the association of the GH gene polymorphism with growth parameters and dressing percentage in the Sumba Ongole (SO) cattle. A total of 267 individual DNA samples were used in the Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) analysis. The SO cattle growth parameters data (n=44) including birth weight (BW), weaning weight at 205 days of age (WW205), yearling weight at 365 days of age (YW365) and also dressing percentage (DP) (n=122) were investigated in this study. There were three genotypes (AA, AB, and BB) of the GH gene based on the PCR-RFLP analysis with allele frequency was 0.87 and 0.13 for A allele and B allele respectively. The highest genotype frequency in the SO cattle is AA (0.76) and the lowest is BB (0.02). The Heterozygosity Observed (Ho) value in the SO cattle population is 0.23 and Polymorphism Information Content (PIC) value is 0.20. Therefore, the genetic diversity in the SO cattle based on the GH gene polymorphism is quite low. There is no association (P>0.05) in BW, WW205, YW365, and DP with genotypes of the GH gene. As the result, the GH gene in this study cannot be used as a genetic marker in the SO cattle breeding program.
Breeding value of sires based on offspring weaning weight as a recommendation for selecting Kebumen Ongole Grade cattle
Authors: Sumadi S. , Fathoni A. , Maharani D. , Ngadiyono N. , Widayati D. T. , Noviandi C. T. , Khusnudin M.
Published: August 2017

The objective of study was to estimate breeding value of sires of Kebumen Ongole grade cattle based on offsprings weaning weight. This research was carried out from August to December 2015 in Urut Sewu area, Kebumen. The calculation of genetic parameter estimation was heritability of weaning weight. The value of heritability was used to calculate the breeding value of sires based on offsprings weaning weight. Heritability was calculated using paternal half-sib correlation with the direct pattern variance analysis. Breeding Value (BV) of sire was calculated by absolute estimated breeding value. The materials used in this study included were data record during the last three years (2013-2015) consisted of 41 sires, 51 dams and 244 calves. Weaning weight data had been corrected based on age of dams, sex and weaning age of 120 days. The results showed that the heritability value of weaning weight was included in high category (0.36 ± 0.21). The highest BV was KJ.J608 (49.76) with a ratio of 231.45%. The results of this study were expected to be the basis recommendation for selecting sires in Kebumen.