bluuebunny/crossref_metadata_2025 huggingface dataset:
Kinetic, isotherm and thermodynamic studies with linear and non-linear fitting for cadmium(II) removal by black carbon of pine cone
Authors: Yavari Z. , Noroozifar M.
Published: July 2017

In this study, black carbon from pine cone (BCPC) and acidic-modified BCPC (MBCPC) powder as a popular agricultural waste in the southeast of Iran were used for cadmium removal from aqueous solutions. The effect of various factors, such as surface chemistry and dosage of adsorbent, contact time, size of particles, initial concentration of cadmium, temperature, and pH of aqueous solutions, was investigated. The results show cadmium removal with usage of the mentioned adsorbents increased after acidic modification. It was noteworthy in this work that the removal percentage of pollutant was above 90% for suggested biosorbents. The obtained experimental data for optimum conditions were selected to model the adsorption behavior of the materials with usage of six isotherm equations via non-linear fitting method and the residual root mean square error estimation for each model. The adsorption of cadmium preferably fitted Khan and Langmuir–Freundlich isotherms for BCPC and MBCPC adsorbents, respectively. The kinetic studies via linear fitting method proved the second-order kinetic was the applicable model for the adsorption process. Thermodynamic studies show the adsorption process of cadmium onto BCPC and MBCPC was spontaneous and endothermic.
Augmenting granular activated carbon with natural clay for multicomponent sorption of heavy metals from aqueous solutions
Authors: Mu'azu Nuhu Dalhat , Essa Mohammed Hussain , Lukman Salihu
Published: July 2017

Multicomponent adsorption of Cd, Cr, Cu, Pb and Zn onto date palm pits based granular activated carbon (GAC) augmented with highly active natural clay at different proportion was investigated. The effects of the initial pH and the adsorbents mixed ratio on the removal selectivity sequence of the metals evaluated. Batch adsorption experiments were undertaken at initial pH 2, 6 and 12. At initial pH 2, both the percent removal and the metals adsorptive capacity decreased with increasing GAC to clay ratio (from 0 to 1) with the percentage removal of Cd, Zn and Cr ions dropping from 68, 81, 100% to 43, 57 and 70%, respectively. At both pH 6 and 12, the percentage removals and adsorption capacities of all the heavy metal ions are higher than at pH 2. Selectivity sequences for pH 2, 6 and 12 followed the order Pb > Cr > Cu > Zn > Cd; Pb > Cr > Cu > Cd > Zn and Cd > Cr > Cu > Pb > Zn, respectively. The adsorption trends were analyzed in relation to point of zero charge and ξ-potential and the metals ions speciation at different pH. These results will help better understand the feasibility of augmenting GAC with natural clay minerals during fixed bed column test which is more beneficial for practical industrial applications.
Cellulolytic and Butyrivibrio fibrisolvens bacteria population density, after supplementing fodder diets (Pennisetum clandestinum)
Authors: Molina G Licet , Giraldo V Luis , Polanco E Diana , Gutiérrez B Lina
Published: July 2017

ABSTRACT Objective. Determine the population density of cellulolytic bacteria, Butyrivibrio fibrisolvens and the concentration of vaccenic acid, by supplementing diets consisting of kikuyu grass (Pennisetum clandestinum Hoechst. Ex Chiov.) as base ingredient, together with cassava flour and biomass (effluent from ethanol production) in rumen simulator-Rusitec. Materials and methods. Four treatments (T) were evaluated, these were composed as: T1/Control 1: 100% kikuyu grass with a total protein intake of 23.9%, T2: a mixture of 70% kikuyu grass, 20% biomass and 10% cassava flour with a total protein intake of 19.4%; T3/Control 2: 100% kikuyu grass, with a 17.8% protein intake and T4: 70% kikuyu grass, 20% biomass and 10% cassava flour with a 15.3% protein intake. One and two-way variance analysis was made and the Pearson correlation coefficient was determined. Results. An increase was observed in the population density of viable cellulolytic bacteria (CFU/ml) and B. fibrisolvens statistically significant (p<0.005) with treatment T2, in contrast to T1, T3 and T4 treatments. In addition, there was a significant increase in the concentration of vaccenic acid (mg/L) in the ruminal content in Rusitec with the same treatment (T2). Conclusions. Results obtained in this ruminal simulation study are evidence to the benefits of kikuyu grass together with cassava flour and biomass diet implementation on the growth of ruminal cellulolytic and B. fibrisolvens bacteria, as well as on the production of vaccenic acid. The study also suggests the nutritional potential that such supplements could provide to grazing bovine feeding.
Estimation of genetic and phenotypic parameters for production traits in Holstein and Jersey from Colombia
Authors: Rincón F Juan , Zambrano A Juan , Echeverri Julián
Published: July 2017

ABSTRACT Objective. Determine the genetic and phenotypic parameters for milk yield, fat percentage, protein percentage and somatic cell score. Materials and methods. 18134 lactation records were used to Holstein and 1377 lactations for Jersey in different herds. The (co) variance components and genetic parameters were estimated using the software Multiple Trait Derivative-Free Restricted Maximum Likelihood MTDFREML. Results. The Holstein and Jersey heritability’s (and standard error) for milk yield were: 0.16 (0.082) and 0.15 (0.306), 0.30 (0.079) and 0.37 (0.319) for protein percentage, 0.32 (0.076) and 0.46 (0.313) for fat percentage and for somatic cell score were: 0.01 (0.054) and 0.01 (0.233), respectively. The largest genetic correlations were found between the percentage of fat and percentage of protein, with values of 0.82 (0.126) and 0.98 (0.852) for Holstein and Jersey respectively. The lowest correlations were between fat percentage and somatic cell score with -0.01 (1.147) and -0.01 (1. 734). Phenotypic correlations were generally found low and repeatability showed a significant effect of permanent environment on milk production per lactation. Conclusions. It is important to emphasize the development of research to help guide breeding programs in the tropics, using selection indices of multi-traits.
Effects of different dietary of protein and lipid levels on the growth of freshwater prawns (Macrobrachium carcinus) broodstock
Authors: Benítez-Mandujano Mario , Ponce-Palafox Jesús T.
Published: July 2017

ABSTRACTObjective. Evaluate the effects of varying dietary protein and lipid levels on the growth and body composition of adult freshwater prawns, Macrobrachium carcinus (Linnaeus 1758), in a recirculation system for 11 weeks (77 days). Materials and methods. The experimental treatments were assigned in triplicate. Six test diets were formulated with three different protein levels (35, 40 and 45%) and two lipid levels (8 and 13%). Results. The highest survival rate, growth indices and feed utilization were observed for M. carcinus adults fed protein:lipid diets of 35:13, 40:13 and 45:13, and the lowest values for these parameters were recorded for prawns fed diets with the lowest lipid levels; the differences in these parameters between these types of diets were significant (p<0.05). A nonsignificant tendency for an increased percentage of protein in the body with an increased dietary protein level was observed. The percentage of lipids decreased with an increasing dietary protein level, and no definite trends in ash content were found. Conclusions. The results suggest that a diet with 35% dietary crude protein and 13% lipids enhances the growth and body composition of adult M. carcinus.
Cryptosporidium spp., comparative diagnosis and geospatial distribution in diarrheic calves from dairy farms, Valdivia, Chile
Authors: Muñoz A Pamela , Mercado P Rubén , Morales T Gabriela , Bravo O Viviana , Raffo C Eduardo
Published: July 2017

ABSTRACTObjective. To determine the Cryptosporidium spp. infection frequency by using Ziehl-Neelsen and Auramine stains on samples obtained from diarrheic calves from milking farms of the Valdivia province. To compare both diagnostic tests and to determine the geospatial distribution of the infections caused by this protozoan. Materials and methods. 221 fecal samples of diarrheic calves of 24 milking farms of the Valdivia province were studied. The processing and analysis of the samples was done by Ziehl-Neelsen (ZN) and Auramine (AU) staining techniques, and the results were compared by McNemar statistical test and the concordance level was determined by kappa index. A map was also generated to determine the geospatial distribution of Cryptosporidium infections. Results. 57.9% of all the animals tested were classified as positive with the ZN stain test, while 55.6% of all the animals turned out positive for the AU stain test. The McNemar test showed no significant difference between both diagnostic techniques (p>0.05), while the kappa index showed proper concordance between tests (κ=0.73). 100% of the farms studied showed protozoan presence demonstrating the broad distribution of the parasite, however, and considering the previous factor, it was not possible to determine geospatial associations for the parasite distribution. Conclusions. The infection frequency of Cryptosporidium is higher than 50% in the milking farms studied from the Valdivia province. No difference between the Ziehl-Neelsen and Auramine staining techniques was demonstrated showing very consistent results. It was possible to detect that the number of farms infected correspond to 100% of the farms analyzed.
Potencialidad de la región costera de Córdoba -Colombia- para el cultivo de tilapia nilótica
Authors: Oviedo P Misael , Brú C Samir , Atencio G Víctor , Pardo C Sandra
Published: July 2017

RESUMENObjetivo. Identificar las áreas con alta potencialidad para el cultivo de tilapia nilótica en la región costera de Córdoba, Colombia. Materiales y métodos. Cinco capas de información fueron incorporadas en un sistema de información geográfica: ubicación potencial de estanques, calidad del suelo, calidad del agua, infraestructura vial, población, limitantes y restricciones. Se recopiló información cartográfica, se revisaron los planes de ordenamiento territorial (POT) de los municipios costeros, se obtuvieron imágenes de satélite de la zona y se tomaron muestras de agua y suelo; esta información fue evaluada, organizada e introducida en la base de datos de sistemas de información geográfica (SIG). Se aplicaron herramientas de análisis espacial y se establecieron modelos de análisis que permitieron la generación e integración de los diferentes temas y la construcción final del mapa de aptitud para el cultivo de tilapia. Resultados. El 2% del área de estudio resultó apta para el cultivo de tilapia nilótica. El alto índice de necesidades básicas insatisfechas (NBI) y las deficiencias en la infraestructura vial tuvieron efecto negativo sobre la potencialidad para la tilapicultura. Altas concentraciones de hierro y ligera acidez en algunas áreas posibilitan la presencia de suelos sulfatados ácidos. La alta turbidez y sólidos suspendidos afectaron la calidad del agua, además de la reducida capacidad de drenaje que en algunas áreas evidencian los riesgos de inundación. Conclusiones. El municipio de San Antero presentó la mejor aptitud para el cultivo de tilapia; sin embargo el área deltaico-estuarina, los ambientes lacustres y sus alrededores en la cuenca baja del Sinú, no resultaron aptos.
Diámetro del cuerpo lúteo y niveles de progesterona sérica, durante el ciclo estral en yeguas criollas colombianas
Authors: Paredes H Pilar , Jiménez E Claudia , Hernández V Aureliano
Published: July 2017

RESUMENObjetivo. Determinar el diámetro del cuerpo lúteo (CL) y los niveles séricos de progesterona (P4) durante el ciclo estral (CE) en yeguas Criollas Colombianas (CC). Materiales y métodos. Se utilizaron 30 yeguas entre 4 a 14 años de edad, ubicadas en Pereira (Colombia). Se realizó ultrasonografía transrectal diariamente, desde la ovulación (día cero), durante dos CE para evaluar el diámetro del CL. Se tomaron muestras de sangre cada 48 horas entre una ovulación y la siguiente para cuantificar niveles séricos de P4 por la técnica de radioinmunoanálisis (RIA). Los datos fueron analizados con estadística descriptiva, desviación estándar, t de Student para determinar diferencias entre los CE y una prueba de correlación entre el diámetro del CL y P4. Resultados. El tamaño del CL durante el CE fue 18.3 ± 5.9 mm (promedio ± desviación estándar). El diámetro el día cero fue 25.1±4.5 mm y el tamaño final del CL 8.5±0.9 mm el día 20 del CE. El mayor diámetro se encontró el día 2 postovulación (26.4±5.0 mm). Los niveles máximos de P4 se encontraron al día 6 postovulación (10.7±4.3 rango 2.51 a 18.8 ng/ml). La concentración de P4 durante el diestro fue 6.6±3.6 (1.15 a 10.7 ng/ml) y durante el estro 0.25±0.3 (0.01m a 0.86 ng/ml). Conclusiones. La yegua CC presenta una dinámica del CL similar a la reportada en la literatura. Los valores aquí reportados pueden ser el punto de partida para establecer valores de referencia de utilidad clínica.
Swine Carcass Condemnation in Commercial Slaughterhouses
Authors: Bueno Lesley S. , Caldara Fabiana R. , Nääs Irenilza A. , Salgado Douglas D. , García Rodrigo G. , Almeida Paz Ibiara C.L.
Published: July 2017

ABSTRACTObjective. The research was conducted to evaluate the main causes of carcass condemnation, as well as the financial loss caused by it, at a commercial slaughterhouse located in Dourados, MS, Brazil. Materials and methods. The data related to carcass condemnation, for the years 2007 to 2009 was obtained from a commercial slaughterhouse, located in the city of Dourados, MS, Brazil, and turned into a percentage of the total number of animals slaughtered during that period. The most frequent causes of carcass condemnation (total or partial) were grouped into classes (pleurisy + pneumonia; enteritis; arthritis; abscesses; fractures/hematomas + contusions + death). The financial loss by the slaughterhouse was estimated using the condemnation data. Results. The total rate of carcass condemnation was low and tended to stability (<0.45%). The most prevalent causes of condemnation during the study period were abscesses and death in the transport, which together accounted for approximately 40% of all condemnation. The condemnation due to health problems tended to decrease or to be stable over the years. However, the condemnations caused by management problems (abscesses, fractures, contusions and death) showed a significant increase. The average loss to the integrative company according to the carcasses condemnation was exceeding U$1,600,000.00 in the years studied. Conclusions. The main causes of carcass condemnation come from management failure. The annual loss by the company can be invested in the training of manpower in order to reduce the rates of carcass condemnation.
Clinical safety of dichlorvos (45%), cypermethrin (5%) and piperonyl butoxide (25%) administered by spray on the skin of cattle
Authors: Moraes Alessandra C , Prado Ed JR , Faria Vanessa P , Gírio Thais MS , Manrique Wilson G , Belo Marco AA
Published: July 2017

ABSTRACTObjective. Due to the importance of controlling ectoparasites, associated with the necessity of technical knowledge on the safety of topical treatment with organophosphates, pyrethroids and piperonyl butoxide to the animal organism, this bioassay was carried out to evaluate the clinical safety of the association of dichlorvos (45%) + cypermethrin (5%) + piperonyl butoxide (25%) administered by spray on the skin of cattle, through the study of clinical parameters, biochemical, haematological and behavioral changes. Materials and methods. Sixteen crossbred animals with a mean age of 18 months, males and females grouped into two treatments with eight animals each: T1 (1:800 v/v) and T2 (1:200 v/v). Were collected blood samples at six different times: before treatment (BT), 24, 48, 72, 96 and 192 hours post treatment (HPT). Results. The antiparasitic association administered by spray on the skin did not result in changes in the enzymatic activity of ALT, AST, GGT and ALP, as well as in serum albumin, triglycerides, cholesterol, urea and creatinine, demonstrating the safety of this antiparasitic compound for maintaining hepatic and renal functionality. The erythrocyte, leukocyte and platelet studies showed no changes caused by treatments, and no clinical signs and behavioral changes were observed after treatment. Conclusions. These findings demonstrated good safety margin for spray treatment on the skin with this antiparasitic compound, even when administered at a dilution of 1:200 v/v, which is four times the dose recommended for ectoparasite control.
Estimation of milk production in hair ewes by two methods of measurement
Authors: Peniche G Irina , Sarmiento F Luis , Santos R Ronald
Published: July 2017

ABSTRACTObjective. The objective of the current study was to compare two methods to estimate daily milk production in crossbred hair ewes. Materials and methods. Eight multiparous, crossbred (Pelibuey x Katahdin) lactating hair ewes were used in a completely randomized design with repeated measurements, for 56 days. Ewes were fed ad libitum with a diet based on concentrate. Milk production was estimated twice a week for each ewe by both methods, suckled-hand (SH) and weigh-suckle-weigh (WSW) method. Results. Milk production (p>0.05) means were 1031.9±95.6 and 1119.0±95.6 g/day/ewe for SH and WSW method, respectively. Conclusions. No significant differences (p>0.05) were found between methods for milk yield.RESUMENObjetivo. El objetivo del presente trabajo fue comparar dos métodos para estimar la producción diaria de leche en ovejas de pelo cruzadas. Materiales y métodos. Se utilizaron ocho ovejas multíparas, cruzadas (Pelibuey x Katahdin) y lactantes, en un diseño completamente al azar, con medidas repetidas, durante 56 días. Las ovejas fueron alimentadas ad libitum con una dieta basada en concentrado. La producción de leche se estimó dos veces a la semana a cada oveja, mediante ambos métodos, el doble pesaje del cordero-ordeño manual de la ovejas (DPC-OMO) y el doble pesaje del cordero (DPC). Resultados. La producción de leche estimada (p>0.05) fue de 1031.9±95.6 y 1119.0±95.6 g/día/ovejas para el DPC-OMO y DPC, respectivamente. Conclusión. No se encontraron diferencias significativas (p>0.05) entre métodos de estimación de la producción de leche.
Non-genetic effects on growth characteristics of Brahman cattle
Authors: Hernández-Hernández Nicacia , Martínez-González Juan , Parra-racamonte Gaspar , Ibarra-Hinojosa Martín , Briones-Encinia Florencio , Saldaña-Campos Pánfilo , Ortega-Rivas Eligio
Published: July 2017

Objective. To determine how some non-genetic factors influence weights at birth (BW), weaning (WW) and yearling (YW) of Brahman calves. Materials and methods. Data corresponding to 58257, 57045 and 40364 for BW, WW and YW, respectively, were analyzed. The models included the effects of year and season of birth and sex, and were considered simple interactions. Results. All effects were significant (p<0.05) for BW, WW and YW. Only the season of birth didn’t have a significant effect (p>0.05) on WW. The average general BW, WW and YW were 32±3.2, 188±37.7 and 291±56.8 kg, respectively. Variables evaluated that take into account the year of birth show a trend to increase weight each year. In relation to the birth season on BW and YW, it was observed that calves born during the rainy season were heavier than those born during the dry season. Similarly, male calves were heavier than females at birth, weaning and one year of age. The effects of the analyzed interactions were significant (p<0.05) for the three variables, except for the season of birth per sex interaction, which did not have a significant effect (p>0.05) for BW and WW. Conclusions. The studied non-genetic factors were important and should be taken into account in management strategies when striving to increase the efficiency of the productive system. Key words: Zebu, birth weight, weaning weight, year weight. (Source: AIMS)
Molecular detection and antimicrobial resistance of Aeromonas from houseflies (Musca domestica) in Iran
Authors: Ommi Davood , Mohammadreza Hashemian Seyed , Tajbakhsh Elahe , Khamesipour Faham
Published: July 2017

ABSTRACT Objective. This study aimed to report the molecular detection and antimicrobial resistance of Aeromonas among houseflies (Musca domestica) in Shahrekord and Isfahan provinces of Iran. Materials and methods. Flies were caught from household kitchens, cattle farms, animal hospitals, human hospitals, slaughter house and poultry farms and put in collection separate sterile tubes. Isolation was accomplished by culture of flies in alkaline peptone water followed by identification with Aeromonas-specific Polymerase Chain Reaction (PCR). Results. Out of 600 houseflies 73 (12.2%) were infected with Aeromonas spp. Significantly higher frequencies of Aeromonas were isolated in Shahrekord province (13.0%; 39/300) than in Isfahan province (11.3%; 34/300). The recovery frequencies of the organisms were significantly lower in kitchens as compared to those in cattle farms and hospital wards which were similar. Higher proportions of infected flies were obtained during summer whereas low proportions were obtained during winter. Conclusions. It is concluded that houseflies do harbor diarrheagenic pathogens, including Aeromonas especially during summer. The carried organisms are resistant to a number of antimicrobials at different levels. Thus, future plans aimed at stemming infections caused by these organisms should take flies into account. Control efforts of infections caused by this particular bacterium should therefore take into account Musca domestica.
Pseudomonas aeruginosa: an emerging nosocomial trouble in veterinary
Authors: Bernal-Rosas Yuly , Osorio-Muñoz Karen , Torres-García Orlando
Published: July 2017

ABSTRACT Objective. The goal of this study was to evaluate the susceptibility pattern of isolates P. aeruginosa from veterinary clinical centers in Bogotá, D.C., to some commonly used antibiotics in clinical. Materials and methods. Bacteriological standard protocols were used for the isolation and identification of bacterial strains. To evaluate the antimicrobial susceptibility of the isolates, to commonly used antibiotics, was performed the Kirby-Bauer agar-disk diffusion method on Mueller-Hinton agar. Results. A total of 160 samples was taken from clinical specimens and the environment in different veterinary clinics. Out of these samples, 89 (55.6%) were gram-negative strains, of which ten strains of P. aeruginosa were isolated (11.2%). All strains were resistant to Cefazolin, Lincomycin, Cephalothin, Ampicillin, Clindamycin, Sulfamethoxazole-Trimethoprim and Chloramphenicol while some isolates exhibited either resistance or an intermediate response to Amikacin (30%), Gentamicin (30%), Tobramycin (10%), Ciprofloxacin (20%), Ceftazidime (30%), Erythromycin (100%), Tetracycline (100%), Imipenem (10%), Meropenem (90%) and Bacitracin (90%). Conclusions. The results demonstrate that the acquired antimicrobial resistances of P. aeruginosa strains depend on antibiotic protocols applied. As observed in human hospitals, Pseudomonas aeruginosa is acting as one of the multidrug-resistant microorganisms of veterinary clinical relevance.
Thrombocyte indices in dogs infected with Ehrlichia canis and Anaplasma phagocytophilum
Authors: Özata Funda , Ural Kerem
Published: July 2017

ABSTRACTObjectives. In the present study alterations in trombocyte numbers and trombocyte indices were investigated in 51 dogs naturally infected with E. canis and/or A. phagocytophilum. Achieved results were compared to those of 20 healty dogs comprising control group. Materials and methods. Naturally occuring vector borne diseases were diagnosed by use of a canine point-of-care ELISA kit (Snap 4Dx, Idexx). Dogs were enrolled into 3 groups as follows; II. group involved A. phagocytophilum infected dogs (n=10), III. group (n=13) E. canis+ A. phagocytophilum co-infected, and IV. group (n=28) E. canis infected dogs. Healthy controls (n=20) were enrolled in group I. Results. Mean PLT counts were significantly decreased in II., III. and IV. groups (159.6±63.5, 142.3±44.3, 148.7±33.5, respectively) in comparison to control group (370.4±28.6) (p≤0.01). Mean PCT values in groups II., III. and IV. (0.1530±0.590, 0.1531±0.0441, 0.1450±0.314, respectively) were significantly decreased in contrast to control group (0.3695±0.0283) (p≤0.01). Between PLT and PCT values, statistically significant positive correlation (p≤0.01) (r=0.988, 0.990 and 0.981, respectively) was evident among groups II., III. and IV. Conclusions. Infected dogs showed significant alterations (p≤0.01) among mean PLT and PCT values and a positive correlation was evident between those 2 parameters (p≤0.01), whereas alterations on mean MPV and PDWc were not statistically significant. Finally it was suggested that according to the aforimentioned results, PLT and PCT values may be used as valuable parameters for diagnosis and probably for monitorization and prognosis in infected dogs with Ehrlichiosis and/or Anaplasmosis
Proposal of heuristic regression method applied in descriptive data analysis: case studies
Authors: Gomes Flávio Adalberto , De O. Assis Alfredo , R. da C. Reis Marcio , M. Gomes Viviane , G. M. Oliveira Sostenes , R. H. de Araujo Wanderson , P. Calixto Wesley
Published: July 2017

The purpose of this paper is to use the hybridized optimization method in order to find mathematical structures for analysis of experimental data. The heuristic optimization method will be hybridized with deterministic optimization method in order to that structures found require not knowledge about data generated experimentally. Five case studies are proposed and discussed to validate the results. The proposed method has viable solution for the analysis of experimental data and extrapolation, with mathematical expression reduced.
INVESTIGATIONS THE EFFECT OF EOSIN B DYE ON X- RAY DIFFRACTION PATTERN OF SILVER NITRATE DOPED PVP FILMS
Authors: Al-Kadhemy Mahasin F. Hadi , Nawaf Sarah Hamid
Published: July 2017

In this research, X-ray diffraction of the powder (PVP polymer, Eosin B dye, and silver nitrate) and (EB/PVP, AgNO3/PVP, EB/AgNO3/PVP) films have been studied. Casting method is used to prepare homogeneous films on plastic petri dishes. All parameters accounted for the X-ray diffraction; full width half maximum (FWHM), Miller indices (hkl), size of crystalline (D), Specific Surface Area (S) and Dislocation Density (δ).The nature of the structural of materials and films will be investigated. The XRD pattern of PVP polymer was amorphous structure with two broader peaks and the Eosin B dye and silver nitrate have crystalline structure. While the mixture between these materials led to appearing some crystalline peaks into XRD pattern of PVP polymer.
Peran Dukungan Sosial dan Kecerdasan Emosi Terhadap Kesejahteraan Subjektifpada Remaja Awal
Authors: Putri Dhian Riskiana
Published: July 2017

Penelitian ini bertujuan mengetahui hubungan antara kecerdasan emosi, dukungan sosial, dan kesejahteraan subjektif pada remaja awal.Subjek penelitian ini adalah siswa kelas VIII SMP Negeri 2 Kota S, berusia 12-15 tahun. Alat ukur menggunakan tiga skala: skala kesejahteraan subjektif, skala kecerdasan emosi, dan skala dukungan sosial. Uji hipotesis menggunakan analisis regresi berganda dengan variabel moderator yang disebut juga sebagai Moderated Regression Analysis (MRA). Hasil penelitian menunjukkan nilai R2 pada model regresi ke-3 lebih tinggi, sebesar 0,667dengan memasukkan interaksi variabel kecerdasan emosi dan variabel dukungan sosial (sebagai variabel moderator), sehingga terbukti variabel dukungan sosial tepat sebagai variabel moderator, mampu meningkatkan hubungan antara variabel kecerdasan emosi dengan variabel kesejahteraan subjektif.
Enabling the Exercise of Choice and Control: How early Childhood Intervention Professionals may Support Families and Young Children with a Disability to Exercise Choice and Control in the Context of the National Disability Insurance Scheme
Authors: Brien Jackie , Page Jane , Berman Jeanette
Published: July 2017

THE NATIONAL DISABILITY INSURANCE Scheme (NDIS) is progressively being implemented across Australia. The Scheme aims to more equitably and sustainably support families and young children with a disability to optimise independence and participation in all aspects of their lives, including early childhood education. A key platform of the NDIS is for people with a disability to have choice and control over decisions about service provision. It is imperative to review the research that investigates what the notion of choice and control over service provision means for families and children with a disability, and how early childhood intervention (ECI) professionals can effectively support this decision making. In this article we argue that to effectively support families and children to experience choice and control, ECI professionals must build and share specialist knowledge and expertise to support informed decision making, engage in positive relationship-building practices and develop a shared approach to accountability with families.
Mutuality and Reciprocity in Parent–teacher Relationships: Understanding the Nature of Partnerships in Early Childhood Education and Care Provision
Authors: Rouse Elizabeth , O'Brien Deanna
Published: July 2017

THE EXPECTATION THAT EDUCATORS will develop partnerships with parents is a key principle in early childhood education and care provision. This is particularly so in Australia where policy guidelines and quality standards list parent partnerships as key indicators of quality practice. However the language used across the two key policy documents, the Early Years Learning Framework and the National Quality Standard, is inconsistent in the way these partnerships are defined and intended to be enacted. This has resulted in an ambiguity in the way teachers and educators are engaging in partnerships in their work with families. Drawing on a framework for examining partnerships that positions the notion of mutuality and reciprocity in the centre of the relationship, and examining this through Bronfenbrenner's (1979) ecological perspective, this paper presents findings of a small scale case study that explored the extent to which these characteristics are reflected in the relationships between the teacher and parents. The study found that while the teacher was meeting identified performance standards, that a true partnership underpinned by mutuality and reciprocity was not evident in the relationships between the teacher and the families.
Bukti Informal Dalam Pembelajaran Matematika
Authors: Suandito Billy
Published: July 2017

Since 1945 the national education curriculum has undergone several times the changes and improvements. In 1947, 1952, 1964 and 1975 teacher-centered learning, whereas from 1984 curriculum involves students learning begin. Similarly, in the 2004 curriculum shades of constructivism learning, where students construct their own concepts or mathematical material. The 2004 curriculum continues with the Education Unit Level Curriculum (SBC) 2006. The education unit level curriculum in 2006 was replaced by Curriculum 2013. Where 2018 is expected all educational units have implemented this 2013 curriculum. Curriculum 2013 is different from the previous curriculum in teaching and learning approaches. Learning in the Curriculum 2013 using a scientific approach: to observe, ask, try, associate and communicate. In mathematics, the old paradigm of the learning process according to Locke that a child's mind as blank paper is clean and ready was often painted his teacher. Piaget said that knowledge is found, created and developed by the students. Maslow said that education is a personal interaction between students and between teachers and students. Good constructivism, RME, and the curriculum in 2013, teachers are required to make the students construct their own learning outcomes. Representation or model can appear in a variety of ways. This paper presents how a mathematical proof or material starting with the use of drawings or models, without mathematical symbols. Theorem to be proved, usually using logical symbols. At first mathematical proof is not easy. Before formally proven, starting with the learning of mathematics using informal evidence that without words, just use the image or geometry.
FPGA Implementation of a Multiphase Space Vector Modulation for Asymmetrical Dual Three–phase AC Machines
Authors: J. Prieto  , F. Barrero  , S. Toral  , M.R. Arahal  , M.J. Durán
Published: July 2017

Current control in conventional motor drives is normally based on controllers with sub harmonic voltage modulation techniques. Space vector modulation (SVM) for three–leg VSI and conventional motor drives has recently become a standard current control technique due to its benefits. That’s why modern microcontrollers and DSPs offer internal peripheral to implement SVM technique for conventional drives. Multiphase (more than three phases) drives possess interesting advantages over conventional three–phase drives. Over the last years, topics related to the extension of control schemes to these specific drives have been covered in depth in literature. However, implementation of SVM for multiphase drives is rare due to its complexity and the specific control peripherals absence. This paper presents the FPGA implementation of a SVM strategy for a very interesting and discussed multiphase drive: the asymmetrical dual three–phase AC machine.
Analytical Model and Investigation of a Four-Switch Space-Vector Modulated Hybrid Power Filter with Six-Fold Switching Symmetry
Authors: J. Klima  , J. Tlusty  , J. Škramlík  , V. Valouch
Published: July 2017

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Investigation of Solar Energy Applications with Design and Implementation of Photovoltaic Traffic Light Signal System for Qatar
Authors: Hassan Moghbelli  , Khaled Ellithy  , Zohreh Eslami
Published: July 2017

The objective of this paper is to promote the use of solar energy in powering traffic signal systems for rural areas in Qatar with no power grid. A photovoltaic system is needed in order to use this energy continuously. The results of the investigation of components, design, and market availability are shown in the paper. Solar cells, which are used for absorbing sunlight and generating electric current, are the main source for the system’s operation. A charge controller is used to control the flow of charge through the battery and to protect the battery from overcharging and deep discharging. A dc-dc converter is used to regulate the output voltage which depends on the type of dc to dc converter. Lead acid batteries are used as the electric energy storage for the PV system to use electrical energy in the absence of sunlight. The principle operation of the system and the feasibility of using it for rural area with no power grid have been studied. For this project, a mount tracker was constructed that enabled the solar panel to be placed at 0, 15, 30, 45, 60, 75 and 90 degree angles in order to determine which angle and what time provides the optimum voltage. Experimental results for different angles of radiation at different times of the day and different days of the year are shown in the paper.
DG integration limits in distribution networks.
Authors: T. Yebra  , V. Fuster  , A. Quijano  , P. Llovera
Published: July 2017

This paper presents the results of a study to establish the limits of operation in underground distribution networks with distributed generation (DG). It has been made simulations with cables of different sections and different type of electric loads/generarators. It has been studied the influence of the cable parameters (length and section) and the load in each case in order to show the values of these parameters that exceed the limits of current and voltage drop in the cable. This information is useful to know the integration limits of several types of DG in distribution networks and the set points to operate these networks.
Centralized normalization of harmonic voltages in the supply network for traction substations
Authors: L. I. Kovernikova
Published: July 2017

The paper solves the problem of centralized reduction of harmonic voltages at the nodes connecting traction substations on railway to the supply HV network via the passive C-type filters. The results of measurements at the connection nodes of traction substations to the supply network of the voltage quality indices that are due to non-sinusoidality are presented. Changes of the indices at different configurations of the supply network are analyzed. Mathematical expressions to determine parameters of the C-type filters, the algorithms for selecting network nodes where they will be installed are given. The parameters of the selected nodes for 220 kV network supplying traction substations with power and also the estimates of the efficiency of work of these filters for different network configurations are presented as an example. The active power losses in the selected filters are calculated.
Analysis and NN-Based Control of Doubly Fed Induction Generator in Wind Power Generation
Authors: Orlando Manuel Soares  , Henrique Nuno Gonçalves  , António Pina Martins  , Adriano Silva Carvalho
Published: July 2017

With the increasing size of wind power generation it is required to perform power system stability analysis that uses dynamic wind generator models. In this paper are presented all the wind power system components, including the turbine, the generator, the power electronic converter and controllers. The aim is to study the Doubly Fed Induction Generator (DFIG) operation and its connection to the power system, either during normal operation or during transient grid fault events. Two different control system design technologies are present, the first is performed by standard PI controllers and the second is based on artificial neural networks.
Improved control of current controlled grid connected inverters in adjustable speed power energies
Authors: J.J. Vague Cardona  , J.C.Alfonso Gil  , F.J. Gimeno Sales  , S. Segui- Chilet  , S. Orts Grau  , N. Muñoz Galeano
Published: July 2017

This Paper presents a comparison of two controlstrategies applied to current controlled inverters in renewableenergy systems. The strategies are the Synchronous ReferenceFrame and Stationary Reference Frame. First control methoduse PI regulators and it is the most used inverters control. Inthis paper, it is shown how to simplify the parameters design ofthe Proportional-Resonant controller for the StationaryReference Frame. This paper presents the grid model anddetailed design and stability analysis with a modified SymmetryCriterion method for the PI regulator parameters calculus. Fromthis point, we transform the designed PI regulator into a PRwhich it's needed for the Stationary Reference Frame Control.Results in terms of THD; indicate the better performance of pRcontrol.
Identification of Photovoltaic Array Model Parameters by Robust Linear Regression Methods
Authors: Maria Carmela Di Piazza  , Antonella Ragusa  , Gianpaolo Vitale
Published: July 2017

The aim of this paper is to propose an approach for photovoltaic (PV) sources modeling based on robust least squares linear regression (LSR) parameter identification method. On the basis of experimental data of solar irradiance, cell temperature and voltage and currents at maximum power points for a given PV array, correlation functions among the considered quantities are defined. By implementing these functions in a Matlab® Simulink model, accurate I-V characteristics for the considered array are obtained, managing only the solar irradiance. The method is validated comparing the computed and the experimental maximum power points (MPPs). Its effectiveness is proven to be better with respect of parameter identification methods based on discrete approaches and standard LSR method
Predicting daily distribution of solar irradiation by neural networks
Authors: S. Seme  , G. Štumberger  , J. Pihler
Published: July 2017

This work focuses on prediction of solar irradiation during the day. In order to predict half hourly solar irradiation during the day an artificial neural network is applied. The artificial neural network was trained using error backpropagation learning rule. Meteorological data measured during three years were used to form learning patterns. The trained artificial neural network was tested with different patterns. Some of them were new while the others were used in the training procedure. The comparison of measured and by the artificial neural network predicted daily distribution of so
Ética y Liderazgo. La neutralidad no existe. Leadership and ethics. Neutrality does not exist
Authors: Simonetta Carlos David
Published: July 2017

El presente trabajo pone en revisión la forma neutral en que ciertos modelos de liderazgo son diseñados, transmitidos, aceptados y practicados dentro del campo de la administración y la gestión de organizaciones. Dicha neutralidad implica un marco que suspende la definición y evaluación de valores y principios y sus impactos. Esta aparente neutralidad se extiende a través de toda la descripción y la normativa de los modelos, y naturalmente deriva en una práctica despojada de valoración ética o de responsabilidad social. El objetivo del estudio del liderazgo en gran parte de la bibliografía administrativa es el rendimiento mediante más y mejores resultados. El afán en la consecución de objetivos financieros, u operativos, hace que las formas de influencia del líder queden en segundo plano mientras conduzcan al resultado esperado. A partir del análisis de un modelo de liderazgo muy difundido, se propone a continuación el estudio de sus riesgos éticos, a partir del trabajo de diversos autores que pugnan por discutir la supuesta neutralidad de valores y principios.
The oncologic burden of hepatitis C virus infection: A clinical perspective
Authors: Torres Harrys A. , Shigle Terri Lynn , Hammoudi Nassim , Link James T. , Samaniego Felipe , Kaseb Ahmed , Mallet Vincent
Published: July 2017

Answer questions and earn CME/CNE

Chronic hepatitis C virus (HCV) infection affects millions of people worldwide and is associated with cancer. Direct‐acting antivirals (DAAs) have changed HCV treatment paradigms, but little is known about the management of HCV infection in patients with cancer. The substantial burden of HCV infection and the inconclusive evidence regarding its detection and management in patients with cancer prompted the authors to review the literature and formulate recommendations. Patients for whom HCV screening is recommended included all patients with hematologic malignancies, hematopoietic cell transplantation candidates, and patients with liver cancer. There is a lack of consensus‐based recommendations for the identification of HCV‐infected patients with other types of cancer, but physicians may at least consider screening patients who belong to groups at heightened risk of HCV infection, including those born during 1945 through 1965 and those at high risk for infection. Patients with evidence of HCV infection should be assessed by an expert to evaluate liver disease severity, comorbidities associated with HCV infection, and treatment opportunities. DAA therapy should be tailored on the basis of patient prognosis, type of cancer, cancer treatment plan, and hepatic and virologic parameters. HCV‐infected patients with cancer who have cirrhosis (or even advanced fibrosis) and those at risk for liver disease progression, especially patients with HCV‐associated comorbidities, should have ongoing follow‐up, regardless of whether there is a sustained virologic response, to ensure timely detection and treatment of hepatocellular carcinoma. HCV infection and its treatment should not be considered contraindications to cancer treatment and should not delay the initiation of an urgent cancer therapy. CA Cancer J Clin 2017. © 2017 American Cancer Society. CA Cancer J Clin 2017;67:411–431. © 2017 American Cancer Society.
IoT and iTV for Interconnection, Monitoring, and Automation of Common Areas of Residents
Authors: Sánchez Héctor , González-Contreras Carlos , Agudo J. , Macías Miguel
Published: July 2017

Internet and, in particular, computer networks have become a key issue in our daily lives, due to the birth of wireless technologies. Internet of Things (IoT) aims to integrate sensors and actuators in daily objects, maximizing miniaturization and minimizing the economic cost of these hardware components. The purpose is to connect these components to the Internet through wireless and fixed networks, and thereby produce information in real time which is then stored for later processing. On the other hand, Interactive TV (iTV) combines traditional TV with interactivity similar to that of the Internet and the personal computer. The evolution of TV technology has brought computing power to this device, offering services apart from the traditional ones, making it a device capable of running applications and maximizing its networking potential. This work presents a framework that includes and integrates a wireless sensor network, an IoT platform, and a real interactive TV application. It covers the deployment and communication of the wireless sensor network through the interoperability of data, to final consumption, through a real interactive television application. It has been tested within a residential community to provide real-time information, in order to improve the quality of life of its inhabitants. In addition, it incorporates the possibility of analyzing this information to establish processes with the objective of reducing energy consumption, thus improving sustainability and contributing to the efficient use of existing resources. The proposed framework serves as the basis for any deployment of similar characteristics.
Composite Materials and Films Based on Melanins, Polydopamine, and Other Catecholamine-Based Materials
Authors: Ball Vincent
Published: July 2017

Polydopamine (PDA) is related to eumelanins in its composition and structure. These pigments allow the design, inspired by natural materials, of composite nanoparticles and films for applications in the field of energy conversion and the design of biomaterials. This short review summarizes the main advances in the design of PDA-based composites with inorganic and organic materials.
Diamond-Like Carbon Nanofoam from Low-Temperature Hydrothermal Carbonization of a Sucrose/Naphthalene Precursor Solution
Authors: Frese Natalie , Taylor Mitchell Shelby , Bowers Amanda , Gölzhäuser Armin , Sattler Klaus
Published: July 2017

Unusual structure of low-density carbon nanofoam, different from the commonly observed micropearl morphology, was obtained by hydrothermal carbonization (HTC) of a sucrose solution where a specific small amount of naphthalene had been added. Helium-ion microscopy (HIM) was used to obtain images of the foam yielding micron-sized, but non-spherical particles as structural units with a smooth foam surface. Raman spectroscopy shows a predominant sp2 peak, which results from the graphitic internal structure. A strong sp3 peak is seen in X-ray photoelectron spectroscopy (XPS). Electrons in XPS are emitted from the near surface region which implies that the graphitic microparticles have a diamond-like foam surface layer. The occurrence of separated sp2 and sp3 regions is uncommon for carbon nanofoams and reveals an interesting bulk-surface structure of the compositional units.