bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Growth Hormone and Calorie Restriction on the Expression of Antioxidant Enzymes in the Liver and Kidney of Growth Hormone Receptor Knockout Mice
Authors: Al-Regaiey Khalid A
Published: June 2019

Caloric restriction (CR) can delay aging and prolong life span and these actions may be related to reduced oxidative damage. Mice with disrupted growth hormone (GH) receptor/binding protein knockout (GHRKO) live significantly longer than their normal siblings. Therefore, it is of interest to examine the effects of chronic CR on hepatic and renal antioxidant enzymes as well as lipid peroxidation (LP) as an oxidative stress marker in GHRKO mice. Female GHRKO and normal mice were either fed ad libitum (AL) or subjected to 30% CR starting at 2 months of age and examined at the age of 9 months. In the liver, catalase (CAT) activity was significantly increased in GHRKO-AL as compared to normal control -AL animals. CR reduced CAT activity in both GHRKO and normal phenotypes. Cu/Zn superoxide dismutase (SOD1) activity was also higher in GHRKO-AL as compared to normal-AL mice. However, CR reduced SOD1 activity in GHRKO mutants. Glutathione peroxidase (GPx) activity was significantly decreased in GHRKO-AL mice and further reduced in GHRKO-CR group of animals. CR significantly increased LP in GHRKOs while its activity was not altered in GHRKO-AL group of mice. In the kidney, CAT activity was lower in GHRKO-AL as compared to normal-AL, however CR did not induce any significant effect in both phenotypes. Similarly, SOD1 levels were significantly lower in GHRKO than in normal mice. GPx expression was higher in GHRKO-AL as compared to control-AL. CR reduced GPx activity in GHRKO mice but increased it in controls as compared to their AL counterparts. There was no difference in LP expression between GHRKO-AL and normal-AL mice. However, CR significantly increased its levels in both phenotypes. Although these findings do not support the hypothesis that CR would increase the capacity of ROS defense mechanisms in GHRKO mice by increasing antioxidant enzymes levels, they do agree with some of the reported effects of CR on their expression. We suspect that GH resistance and CR may affect aging by different mechanisms and if CR delays aging in GHRKO animals it is not due to changes in the activity of antioxidant enzymes.
Frequency-Dependent Mate Selection in the Guppy (Poeciliidae: Poecilia reticulata)
Authors: Porter Andre N. , Frankel Jack S.
Published: June 2019

Heterogeneity within a population enhances its long-term survival. A fundamental method of maintaining population heterogeneity is the retention of rare or uncommon phenotypes by selective mating strategies. Employing two color morphs, red tuxedo and red, of the guppy (Poecilia reticulata, Poeciliidae), this study was designed to investigate whether P. reticulata females would preferentially seek out heterogeneous groupings of males exhibiting two color morphs. Adult female guppies were exposed simultaneously to two groups of males (n=10); one comprised of only the tuxedo color morph (n=5) and the other of both color morphs (n=5). For the latter group, the ratio of males exhibiting the two colorations was changed incrementally over multiple trials, beginning and ending with homogeneous groupings (5:0, 4:1, 3:2, 2:3, 1:4, 0:5). Experiments were conducted employing a 76 L aquarium partitioned at both ends to house the male groups. Individual females were placed into an acclimation, holding column located in the center compartment of the experimental aquarium. Subsequent to a five minute acclimation period in the holding column, each female was released. Courting behaviors and population affinities (i.e. female location relative to the male compartments) were recorded every five seconds over a five minute observation period. Females did not show a preference for male groupings exhibiting either the 4:1 or 1:4 color ratios. However, females clearly showed affinity for the male groupings of 3:2 and 2:3 (p <0.05). This investigation on female mate choice in P. reticulata clearly reveals that a mating strategy is occurring in this species and that it is frequency-dependent.
Genetic Mapping of QTL Associated with Seed Macronutrients Accumulation in ‘MD 96-5722’ by ‘Spencer’ Recombinant Inbred Lines of Soybean
Authors: Bellaloui Nacer , Khandaker Laila , Akond Masum , Kantartzi Stella K. , Meksem Khalid , Mengistu Alemu , Lightfoot David A , Kassem My Abdelmajid
Published: June 2019

Research of quantitative trait loci (QTL) for macronutrient accumulation in soybean seed is limited. Therefore, the objective of this research was to identify QTL related to macronutrients (N, C, S, P, K, Ca, and Mg) in seeds in 92 F5:7 recombinant inbred lines (RILs) developed from a cross between MD 96-5722 (MD) and Spencer using a total 5,376 Single Nucleotide Polymorphism (SNP) markers. A genetic linkage map based on SNP markers was constructed using the Illumina Infinium SoySNP6K BeadChip Array. The RILs were genotyped using 537 polymorphic, reliably segregating SNP markers. A total of 8 QTL for K (qPOT001-qPOT008) were identified on LGs D1b (Chr 1), N (Chr 3), A1 (Chr 5), O (Chr 10), F (Chr 13), B2 (Chr 14), and J (Chr 16). Four QTL for Mg (qMAG001-qMAG004) were identified on LGs N (Chr 3), A1 (Chr 5), J (Chr 16), and G (Chr 18). One QTL for P (qPHO001), one for C on LG J (Chr 16), one for N (qNIT001) and S (qSUL001) on the same LG J (Chr 16), and one QTL for Ca (qCAL001) on LG G (Chr 18). K and Mg QTL were clustered together on LG A1 (Chr 5) with a peak position of 9.50 cM and  LOD support interval of 8.50-9.50 cM. Similar observation was noticed for P, K, Mg, C, N, and S, where the QTL were clustered on LG J (Chr 16) with peak position of 11 cM for K, P, and S, and 10 cM for C and N, and 12 cM for Mg. The LOD support intervals for all these clustered QTL were between 8.90 and 12.30 cM. The QTL clustering of these nutrients suggests possible common physiological and genetic relationships, suggesting possible similar metabolic processes and pathways  for these nutrients. The inverse relationships between N:S ratio and all nutrients suggest possible use of N:S ratio as a measure for higher nutrients accumulation in seed. Since most of QTL identified in this study were not previously reported, this research will further help breeders to improve nutrient accumulation in seeds and contribute to our understanding of the physiological and genetic bases of seed nutrition quality.
Phase Equilibria at Ti–Al Interface Under Low Oxygen Pressure
Authors: Chen Chien Chon
Published: June 2019

In this paper, thirty-nine phases in the Ti-Al-O system at high temperatures have been analyzed through thermodynamic calculations. A Ti-Al-O isothermal stability diagram was obtained from the thermochemical data. The diagrams described the equations for Ti/Al intermetallic compounds at Al2O3/TixAly and Al2O3/TiAl2O5 interfaces, and their corresponding regions. Four univariant equilibria points and ten bivariant equilibria lines at 1000 K were obtained. The equations for the coexistence points and interface lines were also obtained. A three-domain diagram of Ti-Al-O phase arrangement at temperatures between 1000 K and 1200 K was shown. Thermodynamic calculations confirmed that the formation of titanium aluminate spinel (TiAl2O5) requires a threshold TiO2 activity and a partial pressure of oxygen. In the Ti-Al-O system, when aTiO2 < 0.121 and log PO2 < –47.2 atm, TiAl2O5, TiO2, and Al2O3 compounds are not formed at 1000 K; while at the Ti/Al interfaces, compounds are formed in the order of Ti3Al(s) → TiAl(s) → TiAl2(s) → TiAl3(s).
Innovative Nanoimprint-Assisted Fabrication of Anodic Aluminum Oxide
Authors: Chen Po-Chun , Jiang Youwei , Li Dawen , Zou Jun , Cheng Xing
Published: June 2019

Anodic aluminum oxide (AAO) templates possess highly-ordered nanoporous structures, with advantages such as high aspect ratio. However, there are limits to control the growth of the traditional AAO arrays, such as interpore distance, pore sizes and densities. In this study, we introduce an innovative nanoimprint process guided AAO fabrication to overcome these limitations of the traditional AAO arrays.
The Influence of Annealing Temperature on Microstructure and Magnetic Properties of Fe74Co3Si8B10Al1Nb4 Amorphous Alloy Ribbons
Authors: Chen Shih Fan , Chen Chih Yuan , Chiang Chien Fan
Published: June 2019

Multi-component alloy ribbons with a composition of Fe74Co3Si8B10Al1Nb4 were prepared by a single roller melt-spinning method. The alloy had a fully amorphous structure, as determined by X-ray diffraction. The alloy ribbons were annealed for 10 min at temperatures of 350, 400, 450, 500, 550 and 600 oC, respectively. Differential scanning calorimetry curves indicated that the glass transition temperature (Tg) and the supercooled liquid range (ΔTx) of the amorphous alloy ribbon were about 494 oC and 43 oC, respectively. The ribbons showed soft magnetic properties, with a Curie temperature (Tc) at 284 oC, high saturation magnetization (Ms) of 1.18 T, and coercive force (Hc) of 33.66 A/m. In the present study, both saturation magnetization and coercive force of amorphous alloy ribbons increased with increasing the annealing temperature, due to precipitations and growth of α–Fe phase nanocrystals in the amorphous matrix. On the other hand, it was found that the coercive force of alloy ribbons reduced as a consequence of precipitations of Nb3Si phase if the annealing temperature reached 600 oC.
Preparation and Characterization of Molybdenum Thin Films by Direct-Current Magnetron Sputtering
Authors: Chen Shih-Fan , Wang Shea-Jue , Lee Win-Der , Chen Ming-Hong , Wei Chao-Nan , Bor Huy-Yun Y.
Published: June 2019

The back contact electrode with molybdenum (Mo) thin film is crucial to the performance of Cu(In, Ga)Se2 solar cells. In this research, Mo thin films were fabricated by direct current sputtering to attain low-resistivity molybdenum films on soda-lime glass substrates with good adhesion. The films were sputtered onto substrates in 500 nm thickness and nominally held at room temperature with deposition conditions of power and working pressure. Low resistivity (17-25 μΩ∙cm) of bi-layer molybdenum thin films were achieved with combination of top layer films deposited at 300 W with different working pressure, and bottom fixing layer film deposited at 300 W with 2.5 mTorr which adhered well on glass. Films were characterized the electrical properties, structure, residual stress, morphology by using the Hall-effect Measurement, X-ray Diffraction, and Field-Emission Scanning Electron Microscopy, respectively, to optimize the deposition conditions.
Evaluation of Several Agronomic Traits in ‘Essex’ By ‘Forrest’ Recombinant Inbred Line Population of Soybean [Glycine max (L.) Merr.]
Authors: Sherrie Ivey , Khaled Ouertani , Washington Evandrew , Lage Patricia , Woods Samantha , Kantartzi Stella K. , Meksem Khalid , Lightfoot David A. , Kassem My Abdelmajid
Published: June 2019

Crop yield is a polygenic complex trait and its improvement is a major goal of breeding programs. The objective of this study was to compare yield and its components along over a period of four years (2007-2010) in three locations in North Carolina using the ‘Essex’ by ‘Forrest’ recombinant inbred line (RIL) population of soybean (ExF, n=94). The RILs distribution for all traits showed higher means than their respective mid-parental values but do not differ significantly at P<0.05. Nearly 45% of the lines germinated later than 6 days which is the mean for the slower germinating parent, Essex. In approximately 63%, the first flower appeared at 52.5 days, which is the mean mid-parental value. As for seed weight, RILs showed better performance than parental lines and 46% of the plants exceeded the higher yielding parent, Forrest. Seed weight showed the highest level of variation ranging from 54.1% for year to 70.7% for genotype. The lowest coefficients of variation (CVs) on average were calculated for flowering time and did not exceed 31.6%. In contrast , the year of the experiment caused the lowest level of variation for the traits studied while the genotype caused the highest level of variation. Seed germination was positively correlated with plant height (r=0.441 at P<0.001) and negatively correlated with both flowering time (r=-0.374 at P<0.001) and seed weight (r=-0.357 at P<0.001) across environments. Flowering time was found negatively correlated with plant height (r=-0.579 at P<0.001) and positively correlated with seed weight. The ExF population performed well in all environments compared to other populations tested in the same environments. The results presented here can be beneficial to NC soybean breeding programs that aim to create superior high yielding and disease free cultivars adapted to several NC environments.
Effect of Two Row Spaces on Several Agronomic Traits in Soybean [Glycine max (L.) Merr.]
Authors: Akond ASM G. Masum , Bobby Ragin , Bazzelle Richard , Clark Wilsheana , Kantartzi Stella K. , Meksem Khalid , Kassem My Abdelmajid
Published: June 2019

Soybean [Glycine max (L.) Merr.] yield is responsive to changes in plant population and row spacing. The objective of this study was to compare some agronomic traits of soybean cultivated in two different row spaces in a field in St Pauls, NC. Among the traits, total seed weight showed the highest level of variation than others in both 25 cm (97.31%) and 50cm (60.23%) row space. The lowest co-efficient of variation, 5.06% at 25 cm and 11.54% at 50 cm were found for days to flowering. Mean value showed that plants grown in 25 cm row space have a higher 100-seed and total seed weight than those grown in 50 cm row space. Plants grown in 50 cm row space had a slightly increased mean plant height compared to those grown on 25 cm. Plants grown in 50 cm row space had greater pod and seed numbers compared to those grown on 25 cm. Comparisons of the agronomic parameters between 25 and 50 cm row space employed by two-tailed t test (type 2; α = 0.05) showed that there are significant differences in days to germination, days to flowering, number of seeds, and total seed weight between plants grown in 25 cm vs. 50 cm row space; while plant height and number of pods were not differ significantly. However, further research may reveal a system for soybeans cultivation in the future which would increase the probability of obtaining maximum yields with narrow rows.
Key Practices and Interventions for Training and Transitioning UR Students from an HBCU into Advanced Degree Programs in the Biomedical Sciences
Authors: E. Raynor, Jr. James E. Raynor, Jr. , B. Bell Juliette B. Bell , V. Allen Sherrice , Whittington Dawayne , Baldwin Cathy Baldwin , Naik Amita
Published: June 2019

For more than 30 years, institutions funded by NIH had less than an impressive record for achieving diversity in the bio- medical workforce.   To address this concern, NIH recently implemented a series of bold initiatives to bridge the gaps in NIH training programs to further promote diversity. However, critical to the success of these initiatives is the timely report- ing, from institutions with large diverse populations such as HBCUs, of evidence-based practices, strategies, and interven- tions for training and transitioning individuals underrepre- sented (UR) in the biomedical sciences from baccalaureate to Ph.D. degree programs. To this end, the purpose of this study is to evaluate the 10-year success of the NIH-funded MBRS Fayetteville State University (FSU) Research Initiative for Scientific Enhancement (FSU-RISE) program for training and subsequent transitioning of UR students from the baccalaure- ate degree into advanced degree programs in the biomedical sciences. We hypothesized that the FSU-RISE program would significantly increase the number of well-prepared under- graduate UR biology and chemistry students who would graduate and transition into advanced degree programs in the biomedical sciences. This article provides evidence-based findings on practices, strategies and interventions for prepar- ing UR individuals from a Historically Black College and Uni- versity (HBCU) for successful entry into Ph.D. programs
The Effects of Maturity and Preservation Method on Nutrient Composition and Digestibility of Master Graze
Authors: Salamone A. M. , AbuGhazaleh Amer A. , Stuemke C.
Published: June 2019

The objective of experiment two was to evaluate the effects of maturity and harvest preservation method on Master Graze (MG) nutrient composition and digestibility. The MG was harvested on June 28 (Cut 1; 48 days), July 20 (Cut 2; 69 days), and August 12 (Cut 3; 92 days) and samples were then preserved using three different preservation methods (oven-dried hay (HAY), ensiled (SIL), or freeze dried (FD)) at each maturity. The collected samples were then analyzed for organic matter (OM), crude protein (CP), ether extract (EE), acid detergent fiber (ADF), neutral detergent fiber (NDF) and lignin. The OM content was similar for Cut 2 and Cut 3 and both were higher (P < 0.01) than Cut 1 (92.4, 95.4 and 95.0% for cuts 1 to 3, respectively). The NDF content was highest (P < 0.05) with Cut 3 (63.1%) and was least (P < 0.05) with Cut 2 (60.1%). Cut 3 had a higher (P < 0.01) lignin content compared to both Cut 1 and Cut 2 (3.5, 3.4 and 4.1%, respectively). Crude protein content was higher (P < 0.01) for Cut 1 than Cut 2 and Cut 3 (8.0, 6.0, and 6.0%, respectively). The preservation method did not affect the CP or lignin content of the MG. The NDF content was highest (P < 0.01) with HAY (65.8%) and was least (P < 0.01) with FD (58.6%). The digestibility of the MG was measured under in situ conditions using one cow fitted with a rumen cannula. The ground oven-dried hay, ensiled and freeze dried samples were incubated in the rumen for 24 h using the mobile nylon bag techniques. The DM digestibility for Cut 1 and Cut 2 were higher (P < 0.01) than Cut 3 (70.0, 67.0 and 60.3%, respectively). The NDF digestibility was highest for Cut 1 and decreased (P < 0.01) with maturity (58.5, 51.6 and 43.8% for Cuts 1 to 3, respectively). Similarly, the CP digestibility was highest for Cut 1 and also decreased (P < 0.01) with maturity (68.3, 56.1 and 46.5% for Cuts 1 to 3, respectively). The DM and OM digestibility was higher (P < 0.04) with the FD in comparison to both HAY and SIL. Digestibility of NDF was not affected (P > 0.05) by preservation methods, while the CP digestibility was higher (P < 0.03) with the FD (61.6%) than the HAY (51.4%). In conclusion, the nutrient composition and digestibility of the MG were both affected by stage of the maturity and preservation method. The nutritional quality of MG decreased with advanced maturity and the MG digestibility was higher when FD preservation method was used.
Solutions of General Pentagonal Equation Under Certain Conditions
Authors: Karim Mohammed R.
Published: June 2019

It was proved by Galois that there are no formulas that can be used to solve “by radicals” general equations of degree 5 or larger. In this paper we solved the general pentagonal equation under certain conditions. We used the “Quartic Formula” and unipodal numbers respectively for condition 1 and conditions 2 to solve the general pentagonal equation. The unipodal case was elaborated with a detailed example.
Mixed Sampling Product Control for Costly or Destructive Items
Authors: Arul S. Deva , Edna K. Rebecca Jebaseeli
Published: June 2019

This paper presents the derivation of operating characteristics function and associated measures of performance of mixed sampling Plans for costly or destructive items. The first stage is concerned with single sample variable inspection and in the second stage modified Chain Sampling inspection is recommended. If the first stage inspection of mixed plans does not lead to acceptance of the batch or lot then the second stage becomes more important. In the second stage of mixed plans, it is advisable to have small sample size for costly or destructive items. Therefore, in the second stage, the modified chain sampling plan which always utilizes the past lot inspection results in order to achieve very small sample size is taken into consideration. The economic or cost-effective of the sampling plans is measured through Average Sample Number which is smaller compared to any other mixed sampling plans. Designing procedure is given and tables are constructed to facilitate easy application in the production industries.
New Approaches to Selecting Resistance or Tolerance to SDS and Fusarium Root Rot
Authors: Yuan Jiazheng , Bashir Rabia , Salas Graciela , Sharma Hemlata , Srour Ali , Lightfoot David A
Published: June 2019

Fusarial rots are a significant problem worldwide affecting roots (and sometimes fruits) of most major crops including soybean, maize and wheat. Cultivar variation in partial resistance or tolerance is widespread and significant. Different cultivars of the soybean [Glycine max (L.) Merr.] have both resistance/tolerance to the leaf scorch known as Sudden Death Syndrome (SDS) and to the infection and root rot by the causal organism, Fusarium virguliforme (ex. F. solani f. sp glycines) hence the syndrome is composed of two diseases (1-3). Thirteen loci have been identified from analysis of 7 different crosses (2). Using new strains and new methods resistance loci in ‘Hartwig’ and ‘Forrest’, resistant cultivars clearly showed two loci underlie root resistance (lower LG G and D2) and four to eleven loci underlie leaf scorch resistance, depending on the cross made(eg, C2, F, I and upper G in ExF). Transcript abundance analysis of roots in response to F. virguliforme shows an orthologous set of transcripts accumulate during infection of resistant soybean cultivars and Arabidopsis thaliana that include the pathways leading to phenylpropanoid metabolism and its control, guanyl cylase a common second messenger and several transcription factors. Guanyl cyclase is also implicated in resistance in maize. In root disease resistance the genes implicated were known to be stress related. Therefore, A. thaliana is partially resistant and can be used to test both transgenes and mutants in candidate genes. Trangenics show fine maps to BACs have isolated some genes. For example, by fine mapping in NILs candidate genes underlying the controlling loci programming root resistance was a multi-stress resistance protein (lower G; Rfs1). For leaf scorch (Rfs4) an ascorbate peroxidase (C2) has been targeted. Also, Rfs2, a receptor like kinase (G) has been used to generate stable transgenic soybeans. Identification of the genes and loci conferring SDS resistance has provided options to breed improved cultivars with resistance to SDS.
Multi-generation OH oxidation as a source for highly oxygenated
organic molecules from aromatics
Authors: Garmash Olga , Rissanen Matti P. , Pullinen Iida , Schmitt Sebastian , Kausiala Oskari , Tillmann Ralf , Percival Carl , Bannan Thomas J. , Priestley Michael , Hallquist Åsa M. , Kleist Einhard , Kiendler-Scharr Astrid , Hallquist Mattias , Berndt Torsten , McFiggans Gordon , Wildt Jürgen , Mentel Thomas , Ehn Mikael
Published: June 2019

Abstract. Recent studies have recognized highly oxygenated organic molecules (HOM) in the atmosphere as important in the formation of secondary organic aerosol (SOA). A large number of studies have focused on HOM formation from oxidation of biogenically emitted monoterpenes. However, HOM formation from anthropogenic vapours has so far received much less attention. Previous studies have identified the importance of aromatic volatile organic compounds (VOC) for SOA formation. In this study, we investigated several aromatic compounds, benzene (C6H6), toluene (C7H8), and naphthalene (C10H8), for their potential to form HOM upon reaction with hydroxyl radicals (OH). We performed flow tube experiments with all three VOC, and focused in detail on benzene HOM formation in the Jülich Plant Atmosphere Chamber (JPAC). In JPAC, we also investigated the response of HOM to NOx and seed aerosol. Using a nitrate-based chemical ionization mass spectrometer (CI-APi-TOF), we observed the formation of HOM in the flow reactor oxidation of benzene from the first OH attack. However, in the oxidation of toluene and naphthalene, which were injected at lower concentrations, multi-generation OH oxidation seemed to impact the HOM composition. We tested this in more detail for the benzene system in the JPAC, which allowed for studying longer residence times. The results showed that the apparent molar benzene HOM yield under our experimental conditions varied from 4.1 to 14.0 %, with a strong dependence on the OH concentration, indicating that the majority of observed HOM formed through multiple OH-oxidation steps. The composition of the identified HOM in the mass spectrum also supported this hypothesis. By injecting only phenol into the chamber, we found that phenol oxidation cannot be solely responsible for the observed HOM in benzene experiments. When NOx was added to the chamber, HOM composition changed and many oxygenated nitrogen-containing products were observed in CI-APi-TOF. Upon seed aerosol injection, the HOM loss rate was higher than predicted by irreversible condensation, suggesting that some undetected oxygenated intermediates also condensed onto seed aerosol, which is in line with the hypothesis of multi-generation HOM. Based on our results that HOM yield and composition in aromatic systems strongly depend on OH and VOC concentration, we conclude that atmospheric models should account for such dependency and the chemical regime when implementing the quantitative results of laboratory studies. We also suggest that the dependence of HOM yield on chamber conditions may explain part of the variability in SOA yields reported in the literature.
El desafío violeta. Un camino de libertad
Authors: Del Olmo Camlillo Gemma
Published: June 2019

El debate sobre la relación entre feminismo y lesbianismo estuvo muy presente en los años 70 del siglo XX. Las posturas giraban en torno a la importancia del lesbianismo como instrumento político para el feminismo. Por un lado, se afirmaba su relevancia en el movimiento de mujeres y, por otro, se consideraba al lesbianismo una práctica exclusivamente privada, carente de capacidad para la transformación social que propone el feminismo. Esta polémica pervive hasta la actualidad poniendo en evidencia las dificultades para aceptar la pluralidad del sujeto feminista. El problema no son las diferencias constatables sino la forma en que son tratadas, como ya indicó con acierto Audre Lorde. Es el miedo a la ruptura lo que impulsa a reivindicar una unidad en la que inevitablemente las singularidades quedan asfixiadas, pero lo que debilita al feminismo no son las diferencias sino los ejercicios de incomprensión y exclusión hacia ellas. En este trabajo se defiende que el reconocimiento y la afirmación de las especificidades de las mujeres en su pluralidad es fundamental para el feminismo que tiene como meta la libertad.
"Aquí y ahora": la noción de contrato social en el lesbianismo materialista de Monique Wittig
Authors: Hernández Piñero Aránzazu
Published: June 2019

En el presente artículo, analizo el papel que juega la noción de contrato social en el pensamiento lesbiano radical de Monique Wittig. Argumento que la idea wittigiana de contrato social presenta dos dimensiones: una crítica y otra creativa o “utópica”, como la denomina la autora. Con respecto a la dimensión crítica, sostengo que Wittig encuentra en la noción de contrato social la forma de dar cuenta del carácter instituyente y tácito de la heterosexualidad y de desvelar cuáles son los términos del contrato para las mujeres (heterosexualización y apropiación). La dimensión creativa o “utópica” radica, en cambio, en la posibilidad de modificar el pacto. Estimo que la idea de Wittig de contrato social presenta tres características que no coinciden ni con la acepción etimológica ni con la definición clásica de utopía: facticidad, contingencia y actualidad. Concluyo, por tanto, que la dimensión utópica del contrato social no designa un futurible, sino que indica la capacidad de cada sujeto individual (“cada una de nosotras”, en expresión de la autora) de actuar sobre él en el presente, “aquí y ahora” como le gusta decir a Wittig. Asimismo muestro cómo la reconsideración wittigiana del concepto de contrato social se inscribe en su perspectiva del lesbianismo materialista.
Deformes y animalizadas: la subversión de tres autoras de cómic ante el canon físico patriarcal
Authors: Márquez López María Josefa
Published: June 2019

En el cómic español reciente han debutado autoras que refutan la (auto)representación corporal de la mujer tal y como ha sido históricamente custodiada por el orden hegemónico-patriarcal. Ana Galvañ (Murcia, 1975), Roberta Vázquez (Santiago de Compostela, 1989) y Amanda Baeza (Chile, 1990), se encuentran entre ellas. Desafían las normas estéticas mediante el uso de la deformidad y el antropomorfismo, vertebrando un discurso político de rechazo a la relación entre corporalidad e identidad femenina. Las obras que contiene este artículo, dos procedentes de fanzines colaborativos y la tercera de una publicación, han sido seleccionadas a partir de la singularidad de sus lenguajes gráficos y de la crítica que comparten hacia los roles sociales y la dictadura del canon físico normativo. El análisis gráfico de las propuestas dialoga con la reflexión desde los estudios de género para hacer patente en qué medida subvierten gráfica y simbólicamente la iconografía del cuerpo femenino.
Act for Your Life: Widows in Vrindavan
Authors: Ganapathy Radhica
Published: June 2019

To draw further attention to the notion of the physical body as a contested space, I observed widows in Vrindavan, India. Widows relocate to Vrindavan for a multitude of reasons, but, given certain performative theories of identity, this relocation marks the beginning of a distinct performance of widowhood, involving clothing, religious practices, commitments to religious institutions, and begging. Vrindavan's widows' survival depends on their performance of widowhood.
Can't Buy Me Love: Commodification and Redemption in F. Scott Fitzgerald's “The Popular Girl”
Authors: Senn Farrah R.
Published: June 2019

F. Scott Fitzgerald's popular magazine fiction story “The Popular Girl” mirrors in its commodification of characterization, language, relationships, and plot points the same commodification in the author's career, personal life, and national societal experiences in the jazz age. However, the story's emphasis on social and cultural capital—and that of the author and his country—cannot be fully understood through discussion centered strictly on commodification/consumerism or social class alone. Pierre Bourdieu's theory of the interplay of economic and cultural capital can be applied to explain the actions of the main character, Yanci, and by extension Fitzgerald's and 1920s America.
Things of the World: Migration, Presence, and the Arts of Presencing
Authors: Cintrón Ralph , Schneider Jason
Published: June 2019

This essay argues for the value of presence as rhetorical heuristic. Beginning with the philosophical tradition, the authors establish a long-standing interest in presence or isness, understood as the thing-itself outside subjectivity. We then trace how rhetorical theorists including Aristotle, Quintilian, and Perelman have privileged isness as a baseline for true conviction, positioning rhetoric as an effort to imitate material proofs. Such views highlight the tension between presence (things of the world in their isness) and the arts of presencing (the capacity of words and symbols to shape an isness), suggesting a generative frame for analysis. To demonstrate, we examine global migration. Drawing on ethnographic fieldwork among undocumented migrants, we posit that these individuals' paradoxical experiences of bodily presence but legal absence reveal a fraught interplay among rhetoric, state power, and competing notions of truth. However, immigration is only a case study; presence is a much more widely applicable heuristic.
Dwelling Narratively: Exploring Heideggerian Perspectives in the Narrative Paradigm
Authors: Qvortrup Mads , Nielsen Esben Bjerggaard
Published: June 2019

Walter Fisher's narrative paradigm has sparked intense debate about the role of narratives in rhetorical scholarship. The theory has subsequently been followed up by numerous criticisms and revisions. This article argues that especially the latter can benefit from a complementary phenomenological perspective that Fisher himself placed within the original paradigm. Through the Heideggerian concepts of building and dwelling, rhetoric within the narrative paradigm may be seen as a primary means for engaging with both individual and communal goals and exigencies, providing a more nuanced account for how people care for and act on the narratives in their lives.
Expression levels of matrix metalloproteinases in ascites of patients with ovarian cancer and the relationship with pathological characteristics of ovarian cancer
Authors: S Shuna , L Ping , W Junfei
Published: June 2019

Objective: To explore the expression levels of matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase-9 (MMP-9) in ascites in ovarian tumor and provide a theoretical basis for the diagnosis and prognosis evaluation of ovarian cancer ascites.Methods: ELISA was used to detect the levels of MMP-2 and MMP-9 in ascites samples from 73 cases of patients with malignant ovarian tumor, and RIA was used to detect the expression level of CA125 in the serum in these patients.Results: The expression levels of MMP-2 and MMP-9 in ascites in malignant ovarian tumor were higher than those in ascites in benign ovarian tumor (t = 8.08, 10.39, p < .01), and the difference was of statistical significance. The expression levels of MMP-2 and MMP-9 in patients with stage III and IV malignant ovarian tumors were higher than those in patients with stage I and II malignant ovarian tumors, and the difference was statistically significant (t = 2.75, 2.75, p < .05). There was no statistically significant difference in the expression levels of MMP-2 and MMP-9 among the patients with different pathological types, different histological grades, lymph node metastasis or not, different ascites volumes and different residual lesions (p > .05). The sensitivities of detecting MMP-2 and MMP-9 in ascites were 76.0% and 88.0%, respectively, which were significantly higher than those of ascites cytological examinations (χ2 = 4.61, 12.74, p < .05), but in comparison with serum CA125, there was no statistically significant difference (p > .05). The specificities of detecting MMP-2 and MMP-9 in ascites were 78.3% and 82.6%, respectively, which were significantly lower than those of ascites cytological examinations (χ2 = 5.61, 4.38, p < .05), but in comparison with serum CA125, there was no statistically significant difference (χ2 = 1.64, 2.68, p < .05).Conclusions: The levels of MMP-2 and MMP-9 in ascites may be markers for the differential diagnosis of benign and malignant ovarian lesions, and they are related to the prognosis in patients with malignant ovarian tumors.
Benchmarking on Water Resource Utilization Efficiency of Prefecture-Level Cities in Jiangxi, China: A Bootstrap-DEA Approach with Three-Stage DEA Models
Authors: Hu Mianhao , Hu Yunling , Yuan Juhong
Published: June 2019

China has long been adopted traditional data envelopment analysis (DEA) models to measure water resources utilization efficiency of different provinces and cities without bias correction of efficiency scores. In this study, the Bootstrap-DEA approach embedded 3-stage DEA models was introduced to analyze the comprehensive efficiency of water resources utilization in the different prefecture-level cities Jiangxi and tried to improve the application of this method for benchmarking and inter-regional research. It is found that the bias corrected efficiency scores of Bootstrap-DEA differ significantly from those of the traditional DEA model, which implies that Chinese researchers need to update their DEA models for more scientific calculation of water resources utilization efficiency scores. This research has helped narrow the inter-regional gap in the comprehensive efficiency measurement and improvement of water resources utilization. It is suggested that Bootstrap-DEA embedded 3-stage DEA models be widely applied into afterward research to measure comprehensive efficiency of water resources utilization in regional inter-city so as to better serve for efficiency improvement and related decision making.
Redes de apoyo familiares y feminización del cuidado de jóvenes estudiantes universitarios
Authors: Contreras Tinoco Karla Alejandra , Hernández González Eduardo
Published: June 2019

Este trabajo se realizó con el objetivo de analizar las redes de apoyo de jóvenes universitarios y mostrar que la feminización del cuidado, arraigada en nuestra cultura, induce patrones en la dinámica del apoyo social de esta población. Es un estudio cuantitativo y transversal que se llevó a cabo con jóvenes universitarios, que tenían entre 18 y 30 años de edad y que durante el 2016 se encontraban cursando una carrera en el Centro Universitario de la Ciénega de la Universidad de Guadalajara. La recogida de la información se efectuó mediante la aplicación de en línea basado en la rejilla de dispersión de dependencias de Kelly. El análisis de concentración -dispersión se desarrolló mediante POSAC (Partial Order Scalogram Analysis)y SPSS. En los resultados se encontró que la madre es la principal provedora de apoyo para el 94% de los participantes. Mientras que otras personas de la red familiar, como los abuelos, ofrecen poco apoyo. Otro de los hallazgos es que los tíos se colocan como fuente de apoyo relevante, aún más que el propio padre, quien tan solo aparece como figura importante para el apoyo instrumental, asociado a requerimientos económicos.
Modelos de trabajo en la interdisciplina: un análisis relacional de colaboración para el planeamiento hídrico en la Patagonia Norte (Argentina)
Authors: Murgida Ana , Castro Mora , Kazimierski Martín , Membribe Anahí
Published: June 2019

Este artículo analiza la estructura de las relaciones de un proyecto de investigación orientado al planeamiento y manejo ambiental, coordinado por una institución académica local y con financiamiento internacional. La metodología se compone de dos ejes: análisis antropológico y análisis de redes sociales; y se aplica el concepto de “espacio de frontera” para caracterizar las comunidades involucradas en las redes (científicos, tomadores de decisiones públicas y privadas, y técnicos en terreno). Este análisis nos impulsó a proponer nuevas herramientas para mejorar el seguimiento de las colaboraciones interdisciplinarias y comprender la dinámica del proceso de investigación desde su diseño, desarrollo e implementación. Los resultados sugieren que estas herramientas visualizan en tiempo real los éxitos y fracasos de la interfaz ciencia-política-sociedad a partir de las características estructurales de la red de relaciones en distintos momentos del proyecto: la organización de las relaciones sociales, la comunicación entre los actores involucrados y los grados de colaboración entre componentes.
Dual Interleaved LLC Converter for High Power Applications and Wide Load Range
Authors: Frivaldsky Michal , Morgos Jan , Kanovsky Andrej
Published: June 2019

Dual interleaved LLC resonant converter with half bridge topology of main circuit characterized by high switching frequency (500 kHz), high power density (60 W/inch3) and high efficiency (above 96 %) over entire operational range (20 %–100 %) is described. Focus was given on the practical design of power converter, which will be able to fulfil requirements on wide load range operation characterized by upcoming normative. Since proposed topology is based on dual interleaved LLC converter, the resonant component´s critical tolerance was also investigated to secure reliable and optimal operational point. Consequently, proposals for elimination of intolerance negative impact are also described. The results of theoretical analysis were verified directly through experimental measurements. Experimental results are finally compared with upcoming industrial standard 80 Plus Titanium.
Some Remarks on Design of LED Lamps and their AC Direct Drivers
Authors: Filus Zdzislaw , Checinski Jacek
Published: June 2019

Many examples of capacitorless and inductorless drivers used to power LED lamps directly from the AC mains use complicated circuitry in the form of a dedicated integrated circuit which is designed for a particular multistring lamp in order to obtain the value of the power factor very close to 1 and high efficiency of the whole unit. However, the authors of such descriptions do not provide any details concerning the optimum choice of the number of strings in a LED lamp and the number of LEDs in each string. The aim of this work is to show that acceptable values of both electrical parameters mentioned above can be obtained using a LED lamp with just one or two strings. Some formulae and results of their numerical analysis for the 230 V 50 Hz mains are presented, thanks to which designers of LED lamps and their AC direct drivers may easily estimate the optimum conduction voltage of a LED string or the number of single LEDs in a string.
Controller Performance Assessment of a Photovoltaic Generator Terminated in a Current-Mode-Buck-Convertor-Load
Authors: Sitbon Moshe , Mellincovsky Martin , Aharon Ilan
Published: June 2019

In this paper, a comprehensive control analysis is presented, with emphasis on regulating the terminal voltage of a photovoltaic generator, interfaced with a current mode controlled buck DC-DC converter, which is, in turn terminated by a battery. The combined generator-convertor-load system possesses nonlinear behaviour, and is subject to environmental conditions, thus causing the control task complicated. Additionally, analyses of small signal equations reveal a possible unstable condition. Hence, a new method of designing a controller for worst-case scenario is presented. Additionally, results of implementing a typical linear controller (PI), which can be designed only in reference to a single nominal operation point, revealing a varied responses. Simulation and results of mathematical analysis are presented to verify the proposed method.
DEMOCRACIA, GLOBALIZAÇÃO E NORMATIVIDADE JURÍDICA: A RELATIVIZAÇÃO DA SOBERANIA E A EFICÁCIA DOS DIREITOS FUNDAMENTAIS
Authors: Fornasier Mateus De Oliveira , Bedin Gilmar Antonio , Leves Aline Michele Pedron
Published: June 2019

A democracia como forma de sociedade não é uma inovação recente da humanidade. A problemática atual reside no fato de que, com o fenômeno da globalização do mundo e os impactos das novas tecnologias, verifica-se uma verdadeira onipresença do enfraquecimento dos regimes democráticos no cenário contemporâneo. Frente ao massivo desenvolvimento tecnocientífico global, busca-se compreender como a eficácia horizontal dos direitos fundamentais pode contribuir com as democracias contemporâneas, as quais passam a ser evidenciadas em baixa escala no jogo político. Notadamente, o sistema financeiro pauta a razão, e a noção de busca pela promoção dos direitos fundamentais se confunde com a busca dos Estados por maior poder econômico. Assim, o presente estudo objetiva analisar, por meio do emprego do método hipotético-dedutivo e da técnica de pesquisa bibliográfica, o paradigma atual para a efetivação de um ideal de democracia que garanta a proteção dos direitos fundamentais diante dos céleres avanços tecnocientíficos na sociedade globalizada.
Porque diez años no son nada: de @tic revista d’innovació educativa  a  Research in Education and Learning Innovation Archives
Authors: Villar-Hernández Paz
Published: June 2019

Research in Education and Learning Innovation Archives (REALIA) es el nuevo nombre de la revista que desde 2008 y hasta 2018 publicó el Servei de Formació i Innovació Educativa de la Universitat de València. Al igual que antes lo han hecho otras, en 2019 @tic revista d'innovació educativa ha cambiado su nombre. En este texto se repasan los diez años de historia de @tic revista d'innovació educativa, se exponen los motivos de ese cambio y se presentan las novedades introducidas y algunas perspectivas de futuro.
Video Viewing Patterns Using Different Teaching Treatments: A Case Study Using YouTube Analytics
Authors: Walsh John N. , O'Brien Michael P. , Slattery Darina M.
Published: June 2019

This study explores the viewing patterns of 17 instructional videos in both a traditional and flipped classroom environment by 732 business students taking an IT-related module. While previous work has concentrated mainly on outputs(e.g. student satisfaction/results), this study focuses on how the nature of students’ interactions with videos can be determined through a deep analysis of analytics data. The main findings show that there were less interactions with the instructional videos in the flipped classroom environment compared to the traditional environment, and that videos were used more as a revision aid prior to exams (in both environments) than as an ongoing support to develop skills during term. Implications of this study include the need for regular monitoring of how instructional videos are being used during termand the importance of undertaking a deeper analysis of analytics data as the initial summary data may be misleading.
Descubriendo colaboradores online: Formando equipos interdisciplinarios en una universidad argentina
Authors:   Pontificia Universidad Católica de Chile, Gómez-Zará Diego , Andreoli Silvia ,   Universidad de Buenos Aires (Argentina), DeChurch Leslie A. , Contractor Noshir S. ,   Northwestern University United States
Published: June 2019

Este estudio explora cómo y por qué las personas encuentran colaboradores usando sistemas para la formación de equipos. Basados en teorías sobre equipos y capital humano y social, describimos cómo los rasgos de los individuos y sus redes sociales influyen en los procesos de formación de equipos. Realizamos un estudio en Argentina en el que 43 profesores utilizaron una plataforma online y formaron ocho equipos interdisciplinarios. Nuestros resultados muestran que los profesores inicialmente tendían a invitar a contactos anteriores, pero finalmente, formaron equipos interdisciplinarios y cohesivos con personas desconocidas. Concluimos reflexionando sobre cómo estas plataformas pueden permitir a las personas ampliar su capital social.
¿Son bots? Automatización en redes sociales durante las elecciones presidenciales de Chile 2017
Authors:   Universidad Adolfo Ibáñez (Chile), Santana Luis E. , Huerta Cánepa Gonzalo ,   Universidad Adolfo Ibáñez (Chile)
Published: June 2019

En esta investigación se buscaron estrategias automatizadas de creación o difusión de propaganda electoral en redes sociales durante la campaña presidencial de Chile de 2017. Se recolectaron y analizaron casi 2 millones de tuits sobre la elección o vinculados a alguno de los candidatos o sus campañas; en Facebook, se analizaron 2.927 publicaciones oficiales de los candidatos y sus 453.668 comentarios. Mientras que en Facebook el comportamiento fue relativamente normal, en Twitter se descubrió en primera vuelta que hubo brigadistas digitales que actúan de forma autónoma tratando de crear una ilusión de apoyo en las bases.
Status of Sewage Water Generation in Karnataka, India
Authors: Radhika V. S. , Kulkarni G. N.
Published: June 2019

Water is vital to the existence of all living organisms, but this valuable resource is increasingly being threatened with increasing population growth and demand for high water quality for both domestic purposes and economic activities. A critical factor in the estimation of waste water generation is the population growth. The population of the Hubli-Dharwad twin cities is the second-largest in Karnataka, after Bangalore. The present study was based on secondary (time series) data. The population and sewage water flow in twin cities was found to have increased almost nearly about twelve times with the growth rate of 1.07 percent per annum. The projected future population and sewage water generation from twin cities for three decadal points of time showed an increasing trend. This poses a challenging task in future with respect to management. The farmers consider the resource as a boon which provides water for irrigation throughout the year and serves as a source of income and employment.