bluuebunny/crossref_metadata_2025 huggingface dataset:
Metodología costeo por juegos
Authors: Villela Cervantes Claudia Esmeralda
Published: September 2019

El Centro Universitario de Oriente –CUNORI- de la Universidad de San Carlos de Guatemala -USAC- y el Centro de Promoción de la Micro, Pequeña y Mediana Empresa-PROMIPYME, se enorgullecen en presentar el galardón obtenido por el Maestro en Ciencias Adery Luciano Pérez Yoc, con el proyecto denominado “Metodología del costeo a través del juego”, dicha metodología fue utilizada para capacitar en el tema de costos a empresarios y artesanos de la región, con la variante que se incorporó el juego para el aprendizaje, obteniendo el primer lugar en buenas prácticas. La premiación se realizó el 31 de mayo de 2018, en Punta de Cana, República Dominicana, en el segundo encuentro regional de centros de atención MIPYME. El reconocimiento fue otorgado por la Universidad de Texas en San Antonio -UTSA- en la que participaron asesores de la red SBDC/CAM de la región SICA, el proyecto fue financiado por el departamento de Estado de los Estados Unidos en el marco del “Proyecto de sustentabilidad y consolidación de la Red SBDC/CAM de Centroamérica” y con apoyo a nivel regional del Centro de Promoción de la Micro y Pequeña Empresa en Centro Amércia -CENPROMYPE-.
Relación del monitoreo cardiotocográfico intraparto con el estado clínico del recién nacido
Authors: Ramírez López Nancy Elizabeth
Published: September 2019

El monitoreo fetal electrónico intraparto es la valoración del bienestar fetal basado en el registro de la respuesta cardíaca ante los movimientos fetales y las contracciones uterinas, en la práctica obstétrica ayuda a predecir de manera acertada la condición fetal, la adaptación del medio intrauterino al extrauterino, es decir permite evaluar cuál sería el posible Apgar que obtendrá el recién nacido y de esta manera poder determinar la conducta obstétrica a seguir. Se realizó un estudio analítico transversal en el hospital nacional de Chiquimula, en el cual se evaluó la relación entre el monitoreo cardiotocografico fetal intraparto realizado a 271 pacientes con trabajo de parto activo y el estado clínico del recién nacido; a través de medidas de asociación se determinó que las pacientes con un monitoreo cardiotocografico fetal intraparto positivo tendrán 9.2 veces más riesgo de tener un recién nacido con un estado clínico desfavorable que aquellas con un monitoreo cardiotocografico fetal intraparto negativo ( RR= 9.2; 2.722- 31.08 IC95%), de igual manera se determinó que el monitoreo cardiotocografico fetal intraparto positivo tiene una capacidad moderada para predecir un recién nacido con estado clínico desfavorable (Sensibilidad 60%; VPP= 16%) pero el monitoreo cardiotocografico fetal intraparto es muy bueno como predictor del bienestar fetal (Especificidad 88%; VPN=98%) mediante el test exacto de Fisher se obtuvo que el valor P, para dicha relación fue de 0.0007193 (<0.05). Se concluyó que el monitoreo cardiotocográfico intraparto tiene relación con el estado clínico del recién nacido.
Estado nutricional preoperatorio
Authors: Navarro Méndez Kimberly Lucrecia
Published: September 2019

La prueba de valoración global subjetiva (VGS) es una herramienta de evaluación que utiliza el método clínico de valoración de riesgo nutricional a través de la historia clínica y la exploración física para conocer el estado nutricional del individuo. Se basa en datos subjetivos relacionados con: cambio de peso, cambio en ingesta dietética, presencia de síntomas gastrointestinales y capacidad funcional. Este estudio permitió determinar el estado nutricional preoperatorio en 50 pacientes de ambos sexos en edades de 20 a 70 años, que ingresaron para cirugía electiva al servicio de cirugía de adultos del Hospital Nacional de Chiquimula durante los meses de agosto de 2017 a abril de 2018. Resultados y discusión: La prueba muestra que de los 50 pacientes estudiados el 62% están bien nutridos, 32% en riesgo de desnutrición y 6% desnutridos, en el sexo masculino predominó el riesgo de desnutrición con un 55%, el rango de edad que presentó mayor riesgo de desnutrición y desnutrición establecida fue 61 a 70 años con el 16% y 4% respectivamente, se determinó que de la población estudiada, 21 pacientes presentaron una pérdida de peso entre el 5 y 10% y 3 presentaron una pérdida mayor al 10%, es decir una pérdida severa que indica un estado de desnutrición. El tipo de cambio en la ingesta alimenticia fue dieta sólida subóptima con el 44%, el síntoma gastrointestinal más frecuente referido fue náusea con el 40%, la alteración en la capacidad funcional fue 44% y el signo clínico de desnutrición más frecuente fue pérdida de grasa con el 32%. La prueba de valoración global subjetiva de muestra que 16 pacientes presentaron riesgo de desnutrición y 3 se encontraban desnutridos.
Recurrencia de hernias inguinales en el Hospital de Chiquimula
Authors: Morales Carías Danna Aby Danelys
Published: September 2019

Se denomina recurrencia o recidiva al desarrollo de una nueva hernia independientemente del sitio anatómico, con la única condición de que sea del mismo lado operado previamente. El estudio realizado fue de tipo descriptivo retrospectivo, con el objetivo de determinar la recurrencia de las hernias inguinales de acuerdo a las técnicas de reparación quirúrgica en los pacientes postoperados en el Servicio de Cirugía General de adultos del Hospital Nacional de Chiquimula de enero de 2013 a diciembre de 2017. La información obtenida fue por medio de la ficha recolección datos, que ayudó a determinar una alta recurrencia de hernia inguinal con un 8% de 59 casos que fueron intervenidos por hernia inguinal, el 100% corresponden al sexo masculino, la edad dominante fue rango de 31 a 59 años con el 60% (3); según su cronología tiene predominio en un 80% (4) para recurrencia tardía. La técnica más utilizada en la primera intervención quirúrgica de pacientes con hernia inguinal fue un 64% (38) la técnica de Lichtenstein y la más utilizada en la primera intervención quirúrgica de hernia inguinal recurrente incluye otros con 60% (3). Se socializaron los resultados obtenidos con los cirujanos, estudiantes de medicina, la Dirección del Hospital Nacional de Chiquimula y pacientes ingresados postoperados de hernia inguinal.
Recurrencia de las hernias inguinales en el hospital regional de Zacapa
Authors: Díaz Gerónimo Juliana Hercilia
Published: September 2019

El trauma craneoencefálico (TCE) es una lesión del tejido cerebral causada por un traumatismo directo o indirecto a nivel craneal, clasificándose según su gravedad utilizando la escala de coma Glasgow en leve, moderado y severo. Dicha patología es una importante causa de muerte en la población joven, por lo que se realizó este estudio en el Hospital Nacional de El Progreso por la falta de recursos para el manejo clínico, estabilización y rehabilitación del paciente, por lo tanto se hace importante caracterizar al paciente que sufrió trauma craneoencefálico por cualquier causa; realizándose un estudio descriptivo retrospectivo revisando 156 expedientes con historia de trauma craneoencefálico. Los datos fueron recopilados en una boleta de recolección. Del total de casos el género más afectado fue el masculino 84% (131), la edad más frecuente se ubicó de 21 a 30 años 28% (43), la causa más frecuente fue el accidente de tránsito 58% (91), el TCE leve fue el más común 81% (97), solo un 20% (31) se realizó TAC, la lesión mayormente observada por tomografía fue el edema cerebral 39% (12), 5% (7) de los pacientes tuvieron complicaciones infecciosas, 6% (8) requirieron ventilación asistida, la tasa de mortalidad que se obtuvo fue del 3% (5) presentando muerte al arribo. Por lo anterior se sugiere concientizar a la población en educación vial y medidas de seguridad para pilotos y peatones, y así modificar conductas de riesgo para evitar el aumento de la mortalidad por esta patología.
Lesiones de tejido blando
Authors: Rosa Peña Emmanuel Eduardo
Published: September 2019

Desde hace mucho tiempo atrás las lesiones en la piel han sido el tipo de lesiones más comunes como producto de accidentes, en la práctica de deportes, por trabajo pesado, etc. Ya que nuestra principal barrera de defensa exterior de nuestro organismo es la piel y como resultado de la alta frecuencia de padecer este tipo de lesiones es muy elevada. Es por ello que la toma de decisiones en relación al abordaje clínico de una persona con cualquier tipo de lesión en tejido blando puede generar incertidumbre en los profesionales debido a su complejidad, profundidad de la lesión y por la elección del tratamiento adecuado. Por lo tanto, en el cuidado apropiado se debe de tener en cuenta los siguientes principios que nos ayudaran a acelerar la curación de la lesión y el buen pronóstico de la misma, estos principios son; identificar el tipo de lesión, realizar maniobras gentiles sobre la lesión, minimizar el número de lavados de la lesión, observar diariamente la evolución de la lesión y evitar el contacto entre la lesión y la cama. Aunado a estos principios es muy importante la utilización de un apósito adecuado sobre la lesión ya que esto conducirá a una regeneración y epitelización de los tejidos, desde heridas simples y agudas hasta heridas graves y crónicas. Todo esto con el propósito de la mejora temprana y la disminución de la estadía del paciente en el hospital y el riesgo de contraer alguna enfermedad nosocomial.
Designación de Auditorium I-4 “Auditórium MSc. Mario Roberto Díaz Moscoso”
Authors: Guancín Anibal Aroldo
Published: September 2019

En acto especial miembros del Consejo Directivo del Centro Universitario de Oriente CUNORI, a través de acuerdo correspondiente decidieron designar al Auditorio I-4 a partir del uno de agosto de 2018 con el nombre de “Auditórium MSc. Mario Roberto Díaz Moscoso”, por sus múltiples aportes al desarrollo de esta unidad académica durante sus 34 años de servicio.
New Journal Launch: Global Clinical and Translational Research
Authors: Hughes Claude , Zhang Fengyu
Published: September 2019

We are proud to announce the launch of Global Clinical and Translational Research, a new journal that aims to promote clinical and translational research in the genomic era from a global perspective. The journal will (1) provide a unified platform of research communication for basic scientists, medical doctors, other clinical health professionals, social scientists and social workers to share the most recent advances in all areas of clinical and translational sciences; (2) introduce new techniques and methodology such as genomics-based techniques and approaches to design and perform a new generation of clinical research; (3) foster collaborative clinical research from a global perspective.
Common genetic variants shared among five major psychiatric disorders: a large-scale genome-wide combined analysis
Authors: Xia Lu , Xia Kun , Weinberger Daniel , Zhang Fengyu
Published: September 2019

Background. Genetic correlation and pleiotropic effects among psychiatric disorders have been reported. This study aimed to identify specific common genetic variants shared between five adult psychiatric disorders: schizophrenia, bipolar, major depressive disorder, attention deficit-hyperactivity disorder, and autism spectrum disorder.
Methods. A combined p-value of about 8 million single nucleotide polymorphisms (SNPs) was calculated in an equivalent sample of 151,672 cases and 284,444 controls of European ancestry from published data based on the latest genome-wide association studies of five major psychiatric disorder. SNPs that achieved genome-wide significance (P<5x10-08) were mapped to loci and genomic regions for further investigation; gene annotation and clustering were performed to understand the biological process and molecular function of the loci identified. We also examined CNVs and performed expression quantitative trait loci analysis for SNPs by genomic region.
Results. We find that 6,293 SNPs mapped to 336 loci shared by the three adult psychiatric disorders, 1,108 variants at 73 loci shared by the childhood disorders, and 713 variants at 47 genes shared by all five disorders at genome-wide significance (P<5x10-08). Of the 2,583 SNPs at the extended major histocompatibility complex identified for three adult disorders, none of them were associated with childhood disorders; and SNPs shared by all five disorders were located in regions that have been identified as containing copy number variation associated with autism and had largely neurodevelopmental functions.
Conclusion. We show a number of specific SNPs associated with psychiatric disorders of childhood or adult-onset, illustrating not only genetic heterogeneity across these disorders but also developmental genes shared by them all.  These results provide a manageable list of anchors from which to investigate epigenetic mechanism or gene-gene interaction on the development of neuropsychiatric disorders and for developing a measurement matrix for disease risk to potentially develop a novel taxonomy for precision medicine.
Serum levels of oxidants and protein S100B were associated in the first-episode drug naïve patients with schizophrenia
Authors: Liu Lei , Li Yanli , Bian Yun , Yang Fude , Li Xianyun , Han Xiaole , Tian Li , Chen Song , Wang Zhiren , Tan Yunlong
Published: September 2019

Background: Patients with schizophrenia have been noted with an elevation of serum S100B protein concentration, but the pathological process is not known. This study was to investigate the relationship between levels of S100B protein and oxidative stress. Methods: General information and blood sample were collected from the first-episode drug naïve or drug-free acute stage of patients who met the Diagnostic and Statistical Manual of Mental Disorders-IV (DSM-IV) criteria for schizophrenia and healthy controls. The serum levels of S100B, total oxidants (TOS) and malonaldehyde (MDA) were used to measure the level of oxidative stress in both patients, and healthy controls. General linear regression analysis was performed to examine the association of S100B protein with the levels of oxidative stress. Results: The levels of serum protein S100B were associated with the concentration of both TOS (Beta=15.77; p=0.0038) and MDA (Beta=7.90; p=0.0068) in the first-episode drug-naive patients (n=29).While both associations were no longer significant (p>0.05) in the drug-free acute phase patients (n=29); the levels of serum S100B was still consistently associated with TOS (Beta=12.42;p=0.0026) and MDA(Beta=4.11;p=0.0480) in the combined group of patients group(n=58). Simultaneous analysis of both oxidative markers, we still found that both TOS (Beta=12.88; p=0.0103) and MDA (Beta=6.46; p=0.0167) were associated with the serum level of protein S100B in the first-episode drug-naive patients, but not drug-free acute phase patients. Conclusion: Our results suggest that astrocyte activity, serum levels of oxidants, and their cross-talking might be involved in the pathogenesis of schizophrenia. This warrants a further study for understanding the underlying mechanism.
Multidrug-resistant Gram-negative bacilli sepsis from a neonatal intensive care unit: a case-case-control study
Authors: Thatrimontrichai Anucha , Premprat Nutchana , Janjindamai Waricha , Dissaneevate Supaporn , Maneenil Gunlawadee
Published: September 2019

Introduction: To identify the risks and outcomes for multidrug-resistant Gram-negative bacilli (MDRGNB) sepsis in neonates.

Methodology: This was a retrospective case-case-control study between 1991 and 2016. The control group was selected from the same source records of all neonates with clinical or suspected sepsis but not culture-proven.

Results: The numbers of patients in the MDRGNB sepsis, non-MDRGNB sepsis, and control groups were 157, 88, and 218, respectively. MDRGNB sepsis was significantly associated with outborn infants [adjusted odds ratio (aOR) 2.08; p = 0.003] and infants who had a neurologic sequela (aOR 11.58; p = 0.04), lower gestational age (p = 0.03) or previous aminoglycoside use (aOR 2.43; p < 0.001) compared with the control group. Non-MDRGNB sepsis was associated with outborn infants (aOR 2.63; p < 0.001), and infants who had neurologic sequelae (aOR 48.25; p = 0.001) and previous cephalosporin use (aOR 6.28; p < 0.001) or cefoperazone plus sulbactam use (aOR 6.48; p = 0.02) compared with the control group. Case fatality (OR 3.63; p < 0.001) and septic shock (OR 12.81; p < 0.001) rates, length of stay (p < 0.001), and daily hospital costs (p = 0.01) were higher in the MDRGNB sepsis group than in the control group.

Conclusions: Smaller preterm neonate with previous aminoglycoside use had a higher MDRGNB than non-MDRGNB sepsis compared with the control group. Intervention to reduce MDRGNB sepsis in the NICU is cost-effective.
Non-tuberculous mycobacteria profiles and their anti-mycobacterial resistance at a major medical center in Lebanon
Authors: Araj George F , Baba Omar Z , Itani Lina Y , Avedissian Aline Z , Sobh Ghena M
Published: September 2019

Introduction: Infection with non-tuberculosis mycobacteria (NTM) has been on the rise globally causing a wide spectrum of respiratory and extrapulmonary infections in humans. Studies on these pathogens from the Middle-East including Lebanon are scarce.

Methodology: This retrospective study addresses the approach used for investigation, speciation and antimicrobial resistance (AMR) profiles of recovered NTM isolates from respiratory sources at a major tertiary care center in Lebanon during two periods (2003-2007 and 2013-2017). Processing of specimens, culture and differentiation of recovered NTM isolates from Mycobacterium tuberculosis were done in-house according to standard procedures. Upon request, speciation and AMR testing were performed using molecular and broth dilution methods, respectively, at Mayo Medical Laboratories (Rochester, Minnesota, USA).

Results: Among 108 NTM analyzed isolates, 8 species were revealed during the two periods: M. simiae (51% vs 61%), M. avium complex (MAC) (6 % vs 12%) M. fortuitum (12% vs 5%), M. gordonae (6% vs 5%), M. abscessus (6% vs 7%), M. immunogenum (12% vs 0%), M. szulgai (4% vs 0%) and M. peregrinum (0% vs 2%). M. simiae isolates showed high susceptibility (93%-96%) to amikacin and clarithromycin, but high resistance to rifampin, ethambutol, ciprofloxacin, rifabutin, linezolid, trimethoprim/sulfamethoxazole and moxifloxacin. MAC isolates were only susceptible to clarithromycin (86%). M. abscessus isolates were uniformly susceptible to amikacin (100%).

Conclusion: The revelaed different NTM species, with predominance of M.simiae and various AMR profiles provide a current epidemiologic database and help guiding the selection of appropriate empirical therapy once the clinical relevance is established.
Adenovirus 36 and its effect on vitamin D levels in obese and overweight patients
Authors: Kal Çakmaklıoğulları Elçin , Özkan Sevencan Nurhayat
Published: September 2019

Introduction: The aim of this study was to investigate the prevalence of Adenovirus-36 (Ad-36) in overweight and obese patients and the effects of this virus on some metabolic parameters.

Methodology: The study included 236 female patients with body mass index (BMI) ≥ 25. The patients were separated into 2 groups as overweight (BMI: 25-29.99) and obese (BMI ≥ 30). To quantitatively determine the antibody (Ab) specific to adenovirus type 36 in the serum samples, the enzyme-immunoassay (EIA) method was used (AdV36-Ab, ELISA Kit, MyBioSource). Laboratoryparameters were compared between patients who are Ad-36 Ab positive and negative.

Results: Of the total 236 patients, 82 (34.7%) were determined as Ad-36 positive and 154 (65.3%) were negative. Ad-36 Ab positivity was statistically significantly higher in the obese group (p = 0.018). The HOMA-IR index, triglyceride, total cholesterol, high-density lipoprotein, and low-density lipoprotein were found to be the same in both groups with no statistically significant differences(p > 0.05). Vitamin D levels were significantly higher in BMI ≥ 30 Ad-36 Ab positive group than negative group (p < 0.05).

Conclusion: The frequency ofAd-36 Ab positivity was significantly higher in the obese group than in the overweight group. These results can be considered to shed a different perspective from previous reports in literature as only overweight and obese females were included. To the best of our knowledge, this study is the first to have shown that Ad-36 has the effect of elevating the Vitamin D levels.
Long term monitoring of recruitment dynamics determines eradication feasibility for an introduced coastal weed
Authors: Scott John K. , Batchelor Kathryn L. , Webber Bruce L.
Published: September 2019

Bitou bush (Chrysanthemoides monilifera subsp. rotundata) is a Weed of National Significance in Australia and has impacted a significant portion of the eastern coastline. Its discovery in Western Australia was, therefore, a cause for concern. Assessment and control of the isolated and well-defined population began in 2012. To assess the feasibility of eradication in Western Australia as a management outcome for bitou bush, we applied a rigorous data-driven quantification and prediction process to the control program. Between 2012 and 2018 we surveyed over 253 ha of land and removed 1766 bitou bush plants. Approximately 97 person-days were spent over the six years of survey. We measured the seed bank viability for five years starting in 2013, with the 2017 survey results indicating a decline of mean viable seeds/m2from 39.3 ± 11.4 to 5.7 ± 2.2. In 2018 we found only ten plants and no newly recruited seedlings in the population. No spread to other areas has been recorded. Soil core studies indicate that the soil seed bank is unlikely to persist beyond eight years. Eradication of the population in Western Australia, defined as five years without plants being detected, therefore remains a realistic management goal. The information generated from the documentation of this eradication program provides invaluable insight for weed eradication attempts more generally: novel detection methods can be effective in making surveys more efficient, all survey methods are not entirely accurate and large plants can escape detection, bitou bush seeds persist in the soil but become effectively undetectable at low densities, and migration of seed was unquantifiable, possibly compromising delimitation. Continued monitoring of the Western Australian population will determine how much of a risk these factors represent to eradication as the outcome of this management program.
Two new species of the genus Cyanopenthe Nikitsky, 1998 (Coleoptera, Tetratomidae) from southwest China
Authors: Ji Qiaoqiao , Ren Guodong
Published: September 2019

The genus Cyanopenthe Nikitsky, 1998 is first recorded from mainland China. Two new species, C. granulatasp. nov. and C. hirtiscutellarasp. nov., are described and illustrated. This genus is redefined, and an updated key to the known species is presented.
»Če bo hotel muzej pridobiti kaj boljših stvari, bo moral za nakup tvegati večje vsote.« Nakupi za Narodni muzej na dražbi Szapáryjeve zbirke v Murski Soboti
Authors: Komić Marn Renata
Published: September 2019

V letih 1930 in 1931 je v gradu Murska Sobota na skrajnem vzhodu Dravske banovine v Kraljevini Jugoslaviji potekala javna dražba. Razprodajali so premično premoženje madžarskega državljana in veleposestnika grofa Ladislava Szapáryja, lastnika murskosoboškega gradu. Analiza dražbenega/prodajnega zapisnika, cenilnega kataloga in drugega z razprodajo povezanega gradiva prinaša dragocene podatke o grofovi zbirki in osvetljuje poti, po katerih so umetnine zapustile grad v Murski Soboti. Poleg tega postavlja izhodišča za ugotavljanje njihove poznejše usode in pogosto tudi sedanjega hranišča. Tako je bilo mogoče sestaviti popoln seznam predmetov iz Szapáryjevega gradu, ki jih je na dražbi leta 1930 nakupil Josip Mal, ravnatelj Narodnega muzeja v Ljubljani, in jih natančneje predstaviti. Čeprav se je Mal precej prenaglil pri kupovanju in negospodarno porabil sredstva, ki jih je imel na razpolago, pa je bil izbor predmetov premišljen, daljnosežen in utemeljen, saj gre večinoma za izjemne umetnine, ki si zaslužijo več pozornosti, kot so je bile deležne doslej.
Restitucija predmetov kulturne dediščine iz Avstrije v Jugoslavijo po letu 1945
Authors: Vodopivec Barbara
Published: September 2019

Prispevek obravnava restitucijo predmetov kulturne dediščine iz Avstrije v Jugoslavijo po letu 1945. Ugotovitve predstavljajo podlago za nadaljnje umetnostnozgodovinske raziskave provenience. Prispevek izhaja iz kritične analize arhivskega gradiva, ki v tem kontekstu še ni bilo interpretirano in ki ga hranijo Arhiv Jugoslavije, Arhiv Republike Slovenije in Informacijsko-dokumentacijski center za dediščino Ministrstva Republike Slovenije za kulturo. V ospredje postavlja osvetlitev okoliščin, v katerih je potekala restitucija, rekonstrukcijo ključnih akterjev in ustanov ter oceno stopnje realizacije zahtevkov za vračilo predmetov kulturne dediščine, ki jih je proti Avstriji vložila Jugoslavija oziroma Slovenija. Pri tem izpostavlja vzroke za stanje in tako poglablja razumevanje procesa restitucije. Odgovore vpenja v širši kontekst rekonstrukcije povojne Evrope, od vloge zaveznikov in političnega, zakonodajnega ter diplomatskega oblikovanja nove države Jugoslavije do soočenja Evrope z vojno škodo in s tem povezanega vzpostavljanja novih identitet ter doktrine varstva kulturne dediščine. Zaradi velikega obsega arhivskega gradiva se prispevek osredotoča na analizo dokumentov jugoslovanske strani.
Cerkve goriške nadškofije na Kranjskem v času nadškofa Karla Mihaela grofa Attemsa. 1. del: Bistrski, gorenjski in metliški arhidiakonat
Authors: Volčjak Jure
Published: September 2019

V obsežnejšem članku, ki bo razdeljen na tri dele, bodo predstavljene cerkve goriške nadškofije na Kranjskem, ki so omenjene v vizitacijskih zapisnikih prvega goriškega nadškofa Karla Mihaela grofa Attemsa (1752–1774). V prvem delu prikazujemo cerkve arhidiakonata kartuzije Bistre, gorenjskega arhidiakonata in arhidiakonata nemškega viteškega reda v Beli krajini. Na začetku članka so prikazani patrociniji oziroma titulature oltarjev na osnovi liturgične hierarhije, sledi predstavitev posameznih cerkva po začrtani strukturi,
Longitudinal influences of socio-economic status on visual-motor integration: The North-West Child Health, Integrated with Learning and Development study
Authors: Coetzee Dané , Pienaar Anita E. , Van Wyk Yolanda
Published: September 2019

Background: Visual motor integration plays an important role in academic skills of learners in the early school years and can have an impact on their overall academic performance.Aim: This study aimed to determine the influence of socio-economic status (SES) on changes in visual-motor integration, visual perception and motor coordination over a period of three years.Setting: Four school districts in the North West province of South Africa were used.Methods: Five hundred and seventy-three learners (282 boys, 291 girls) were randomly selected (representing different SES schools) and evaluated at baseline during 2010 when they were in Grade 1 (6.9 years ±0.38) and again three years later in 2013 (9.9 years ±0.42) as part of a longitudinal research study. The Beery Visual-Motor Integration Test 4th edition was used to evaluate the visual-motor integration, visual perception and motor coordination skills at baseline and three years later.Results: Baseline measurements were higher among high SES learners in all three skills. Although learners from high SES still outperformed the learners from low SES three years later, low SES learners showed statistically significant improvements over the three years in visual-motor integration (88.24 to 89.85, p=0.041) and visual perception (89.69 to 90.04, p≤0.001).Conclusion: Age-related development and improvement of the visual-motor integration skills were reported over the three year period. However, more learners from the low SES still showed delays in these skills. Delays in the development of these skills could contribute to poorer academic and learning-related achievements.
‘They are visually impaired, not blind … teach them!’: Grade R in-service teachers’ knowledge of teaching pre-reading skills to visually impaired learners
Authors: Kao Matiekase A. , Mzimela Patience J.
Published: September 2019

Background: Teaching reading skills is the cornerstone of all learning; therefore, teachers’ adherence to this mandate is important. However, it becomes complicated and challenging if the teacher has to teach pre-reading skills to Grade R learners with visual impairments. In light of this challenge, researchers have endeavoured to determine the Technological Pedagogical and Content Knowledge (TPACK) that teachers should possess for the effective teaching of reading in classrooms with visually impaired learners.Aim: This article explores a small sample of in-service teachers’ knowledge of using Braille to teach pre-reading skills to Grade R learners with visual impairments.Setting: The study was conducted in a School for the Blind in Maseru, Lesotho, where three Grade R in-service teachers teaching learners with visual impairments were purposively sampled.Methods: This study is underpinned by Koehler and Mishra’s theory of TPACK. An interpretivist, qualitative small-scale case study approach was employed, using semi-structured interviews and classroom observations. Document analysis was also used to corroborate findings.Results: Findings reveal that although some of the participants possess a high level of technological knowledge, they tend to teach Braille as a ‘stand-alone’ skill and fail to integrate it with the teaching of other pre-reading skills to Grade R learners.Conclusion: In-service teachers showed limited knowledge of some of the essential skills for teaching pre-reading skills to Grade R learners who are visually impaired. The study calls for supportive in-service teacher education programmes that equip Grade R teachers of learners with visual impairments with the necessary skills to teach pre-reading skills.
A tool to enhance the planning of children’s literature lessons for Setswana as Home Language
Authors: Marais Elma , Nel Carisma , Dlavane Dolly
Published: September 2019

Background: Universities, specifically faculties of education, have the responsibility to ensure that student teachers are introduced to the complexities involved in planning conceptually sound, coherent and cohesive lessons.Objectives: The objectives of this study were to determine how prepared students teachers are to plan children’s literature and develop a tool for use by teachers specializing in Setswana to support them when planning and preparing for children’s literature lessons.Methods: A Qualitative case study design was chosen for this study.Results: The results of this study indicated that primary pre-service teachers in South Africa do not receive cohesive and coherent as well as intensive preparation in the planning of lessons focusing on children’s literature. In addition, most primary pre-service teachers were not familiar with the titles, some genres and levelled questioning techniques used in planning children’s literature lessons. The results indicated that student teachers studying at a distance and specialising in Setswana as a Home Language were experiencing difficulties relating to the literature planning and preparation.Conclusion: Skillful planning, entails taking into account the knowledge and developmental level of learners, their specific social and cultural contexts, knowledge of subject matter and learning goals, as well as knowledge of teaching strategies and practices.
Pre-service mathematics teachers’ development process in using manipulatives in number operations
Authors: Ndlovu Zanele A. , Chiromo Lytion
Published: September 2019

Background: Teaching using manipulatives is emphasised, especially in the early grades, to help learners conceptualise operations on whole numbers. Therefore, teachers’ competencies in using manipulatives is the key in helping learners master these basic operation skills.Aim: Drawing from the literature on using manipulatives to improve learners’ performance in mathematics, this study recounts foundation phase pre-service teachers’ conception of using manipulatives to enhance their competencies and reasoning skills to model the solution in number operations.Setting: Data presented here was collected from 31 participants. These pre-service teachers either passed mathematics or mathematical literacy with 40% at the grade 12 level.Methods: Data was collected from participants’ written work (e.g. classroom tasks, homework, tests and examinations) and during class discussions. Interviews were conducted with some students. We analysed their conception guided by the APOS theory, namely, Action-Process- Object-Schema.Results: We observed improvement in the conception of using manipulatives among pre-service teachers. In the first semester, most students display action conception of using manipulatives to either represent or model a solution. However, in the second semester, most students either display process or object conception as explained in the genetic decomposition. We attributed the improvement to change of instruction in the second semester as we taught in accordance with the APOS theory.Conclusion: It is evident that there are a number of contributing factors to pre-service teachers’ conception of mathematical concepts, and teacher educators need to pay particular attention to these to help pre-service teachers master the concepts they would teach at school.
Moving beyond league table standings: How measures of opportunity to learn can inform educational quality and policy directives?
Authors: Van Staden Surette , Combrinck Celeste , Roux Karen , Tshele Mishack , Palane Nelladee M.
Published: September 2019

Background: South Africa’s participation across a number of international large-scale assessment programmes provides continued evidence of poor student achievement across grades and phases. Despite discouraging achievement results, evidence of slow progress begins to emerge, yet systemic inequalities persist.Aim: This article aims to unpack the possible value of large-scale assessment data in measuring equal educational opportunity as conceptualised by the opportunity to learn (OTL).Setting: While overall scores on international large-scale assessment in countries like South Africa are often driven by aptitude, student motivation and social class, OTL, as described in this article, should provide a more accurate reflection of the nature of performance and the kinds of opportunities afforded to students across an unequal sector to learn.Methods: A multiple linear regression was conducted using the South African PIRLS 2016 teacher and student questionnaire data and the PIRLS Literacy Grade 4 overall reading literacy performance score as the dependent variable.Results: While socio economic status makes a substantial contribution in the current model, the only predictor that was significant is the scale based on student reports on lessons about reading.Conclusion: Through the use of multiple regression analysis, this article concludes that a more effective use of large-scale assessment data from an OTL perspective, specifically in developing contexts, is still problematic using teacher and student questionnaire data. Issues of social desirability and overly positive reporting make any claims about the teachers’ role in providing opportunities to learn and exposure to the curriculum in the classroom difficult to gauge.
Well-posedness and regularity for a generalized fractional Cahn–Hilliard system
Authors: Colli Pierluigi , Gilardi Gianni , Sprekels Jürgen
Published: September 2019

In this paper, we investigate a rather general system of two operator equations that has the structure of a viscous or nonviscous Cahn–Hilliard system in which nonlinearities of double-well type occur. Standard cases like regular or logarithmic potentials, as well as non-differentiable potentials involving indicator functions, are admitted. The operators appearing in the system equations are fractional versions of general linear operators

A

and

B

, where the latter are densely defined, unbounded, self-adjoint and monotone in a Hilbert space of functions defined in a smooth domain and have compact resolvents. In this connection, we remark the fact that our definition of the fractional power of operators uses the approach via spectral theory. Typical cases are given by standard second-order elliptic differential operators (e.g., the Laplacian) with zero Dirichlet or Neumann boundary conditions, but also other cases like fourth-order systems or systems involving the Stokes operator are covered by the theory. We derive in this paper general well-posedness and regularity results that extend corresponding results which are known for either the non-fractional Laplacian with zero Neumann boundary condition or the fractional Laplacian with zero Dirichlet condition. It turns out that the first eigenvalue

\lambda_1

of

A

plays an important und not entirely obvious role: if

\lambda_1

is positive, then the operators

A

and

B

may be completely unrelated; if, however,

\lambda_1

equals zero, then it must be simple and the corresponding one-dimensional eigenspace has to consist of the constant functions and to be a subset of the domain of definition of a certain fractional power of

B

. We are able to show general existence, uniqueness, and regularity results for both these cases, as well as for both the viscous and the nonviscous system.
Non-uniqueness of signed measure-valued solutions to the continuity equation in presence of a unique flow
Authors: Bonicatto Paolo , Gusev Nikolay A.
Published: September 2019

We consider the continuity equation

\partial_t\mu_t + \mathrm {div}(\mathbf b\mu_t) = 0

, where

\{mu_1\}_{t \in \mathbb R}

is a measurable family of (possibily signed) Borel measures on

\mathbb R^d

and

\mathbf b : \mathbb R \times \mathbb R^d \ to \mathbb R^d

is a bounded Borel vector field (and the equation is understood in the sense of distributions). If the measure-valued solution

\mu_t

is non-negative, then the following
superposition principle
holds:

\mu_t

can be decomposed into a superposition of measures concentrated along the integral curves of

\mathbf b

. For smooth

\mathbf b

this result follows from the method of characteristics, and in the general case it was established by L. Ambrosio. A partial extension of this result for signed measure-valued solutions

\mu_t

was obtained in [AB08], where the following problem was proposed: does the superposition principle hold for signed measure-valued solutions in presence of unique flow of homeomorphisms solving the associated ordinary differential equation? We answer to this question in the negative, presenting two counterexamples in which uniqueness of the flow of the vector field holds but one can construct non-trivial signed measure-valued solutions to the continuity equation with zero initial data.
Line and rational curve arrangements, and Walther’s inequality
Authors: Dimca Alexandru , Sticlaru Gabriel
Published: September 2019

There are two invariants associated to any line arrangement: the freeness defect

\nu(C)

and an upper bound for it, denoted by

\nu'(C)

, coming from a recent result by Uli Walther. We show that

\nu'(C)

is combinatorially determined, at least when the number of lines in

C

is odd, while the same property is conjectural for

\nu(C)

. In addition, we conjecture that the equality

\nu(C)=\nu'(C)

holds if and only if the essential arrangement

C

of

d

lines has either a point of multiplicity

d-1

, or has only double and triple points. We prove both conjectures in some cases, in particular when the number of lines is at most 10. We also extend a result by H. Schenck on the Castenuovo–Mumford regularity of line arrangements to arrangements of possibly singular rational curves.
Existence and uniqueness for a two-scale system involving tangential operators
Authors: Amar Micol , Gianni Roberto
Published: September 2019

In this paper we prove existence and uniqueness for a parabolic and a parabolic/elliptic two-scale system of partial differential equations typically arising in homogenization theory or in macroscale-microscale applied models.
Semi-classical states for the nonlinear Choquard equations: existence, multiplicity and concentration at a potential well
Authors: Cingolani Silvia , Tanaka Kazunaga
Published: September 2019

We study existence and multiplicity of semi-classical states for the nonlinear Choquard equation

-\varepsilon^2\Delta v+V(x) v = \frac{1}{\varepsilon^\alpha}\,(I_\alpha*F(v))f(v) \quad \hbox{in } \mathbb{R}^N,

where

N\geq 3

,

\alpha\in (0,N)

,

I_\alpha(x)={A_\alpha/ |x|^{N-\alpha}}

is the Riesz potential,

F\in C^1(\mathbb{R},\mathbb{R})

,

F'(s) = f(s)

and

\varepsilon>0

is a small parameter.

We develop a new variational approach and we show the existence of a family of solutions concentrating, as

\varepsilon\to 0

, to a local minima of

V(x)

under general conditions on

F(s)

. Our result is new also for

f(s)=|s|^{p-2}s

and applicable for

p\in ({N+\alpha\over N}, {N+\alpha\over N-2})

. Especially, we can give the existence result for locally sublinear case

p\in ({N+\alpha\over N},2)

, which gives a positive answer to an open problem arisen in recent works of Moroz and Van Schaftingen.

We also study the multiplicity of positive single-peak solutions and we show the existence of at least

{\rm cupl}(K)+1

solutions concentrating around

K

as

\varepsilon\to 0

, where

K\subset \Omega

is the set of minima of

V(x)

in a bounded potential well

\Omega

, that is,

m_0 \equiv \inf_{x\in \Omega} V(x) < \inf_{x\in \partial\Omega}V(x)

and

K=\{x\in\Omega;

\, V(x)=m_0\}

.
Обобщенная гладкость и приближение периодических функций
в пространствах $L_p$, $1<p<+\infty$
Authors: Руновский Константин Всеволодович , Runovskii Konstantin Vsevolodovich
Published: September 2019

Нормы образов операторов мультипликаторного типа с произвольным
генератором оцениваются при помощи наилучших приближений
тригонометрическими полиномами в шкале пространств $L_p$, $1<p<+\infty$,
периодических функций одной переменной. В качестве следствий
получены неравенство типа Бернштейна для обобщенной производной
тригонометрического полинома, порожденной произвольным генератором $\psi$,
достаточные конструктивные условия $\psi$-гладкости, оценки наилучших
приближений $\psi$-производных, оценки наилучших приближений
$\psi$-гладких функций, а также обратная теорема теории приближений
для обобщенного модуля гладкости, порожденного произвольным
периодическим генератором.
Библиография: 22 названия.
О справедливых раскрасках гиперграфов
Authors: Ахмеджанова Mаргарита , Akhmejanova Margarita
Published: September 2019

Раскраска в два цвета называется справедливой, если, с одной стороны, нет одноцветных ребер (правильная раскраска), а с другой стороны, мощности цветовых классов отличаются друг от друга не более чем на единицу. Доказано, что для наличия справедливой раскраски в два цвета достаточно такой же по порядку оценки на число ребер, как и для правильной раскраски, что усиливает ранее известную теорему Радхакришнана и Сринивасана.
Библиография: 9 названий.
Обратные задачи определения параметра поглощения
в уравнении диффузии
Authors: Кожанов Александр Иванович , Kozhanov Aleksandr Ivanovich
Published: September 2019

Изучаются обратные задачи нахождения вместе с решением
$u(x,t)$ уравнения диффузии
$$
u_t-\Delta u +[c(x,t)+aq_0(x,t)]u=f(x,t)
$$
также параметра $a$, характеризующего поглощение ($c(x,t)$,
$q_0(x,t)$ - заданные функции). Предполагается, что для
функции $u(x,t)$ задаются условия непротекания, а также
некоторые специальные условия переопределения интегрального
вида. Доказываются теоремы существования решений $(u(x,t),a)$
таких, что функция $u(x,t)$ имеет все обобщенные по
С. Л. Соболеву производные, входящие в уравнение, $a$ же есть
неотрицательное число.
Библиография: 16 названий.
Фреймы Парсеваля и дискретное преобразование Уолша
Authors: Фарков Юрий Анатольевич , Farkov Yurii Anatol'evich , Робакидзе Мирза Гиушаевич , Robakidze Mirza Giushaevich
Published: September 2019

Пусть $N=2^n$ и $N_1=2^{n-1}$, где $n$ - натуральное число. Обозначим через ${\mathbb C}_N$ пространство комплексных $N$-периодических последовательностей со стандартным скалярным произведением. Для любого $N$-мерного комплексного ненулевого вектора $(b_0,b_1,…,b_{N-1})$, удовлетворяющего условию $$ |b_{l}|^2+|b_{l+N_1}|^2 \leqslant \frac{2}{N^2} , \qquad l=0,1,…,N_1-1, $$ найдены последовательности $u_0,u_1,…,u_r\in {\mathbb C}_N$ такие, что система их двоичных сдвигов является фреймом Парсеваля для ${\mathbb C}_N$. При этом вектор $(b_0,b_1,…, b_{N-1})$ задает дискретное преобразование Уолша последовательности $u_0$, а выбор этого вектора позволяет адаптировать предлагаемую конструкцию к обрабатываемому сигналу по энтропийному, среднеквадратичному или иному критерию. Библиография: 27 названий.
Experimental Investigation of Al-Mg-SiC-Fly Ash Composites for Automotive Alloy Wheel Rims
Authors: Sai Virinchy Chintala , Jayakumar V. , Hafeez Asif Abdul , Pugazhenthi R.
Published: September 2019

The conservation of resources is the biggest concern for the past half century. The mankind is heading towards the betterment of living with a key intention to obtain pertaining results with less effort. One such field which has been an extensive outreach for research and innovation is the composite materials. This study focuses on design and development of a new composition of materials which has enhanced mechanical properties than the existing materials. This study is about combining four materials namely aluminium, magnesium, SiC and fly ash in various proportions and to test the obtained specimens. The test specimens are fabricated with aluminium as the metal matrix and other materials (Mg, SiC and fly ash) as reinforcements. Three different combinations are designed by keeping the fly ash, silicon carbide at constant percentage and varying the contents of aluminium and magnesium. The results of the tests are promising and the proposed composition can be a potential reliable replacement material for existing alloy wheels.
Parametric Optimization for the Design of Passenger Vehicle Suspension System with the Application of Genetic Algorithm
Authors: Avesh Mohd , Srivastava Rajeev , Sharma Rakesh Chandmal
Published: September 2019

In this paper an improved suspension system of a four-wheel vehicle is designed to minimize the vehicle floor vibrations. A seven degree-of-freedom full car model of vehicle system is modelled using the linear approach and is excited under the uncertain road inputs approximated by the white noise function. Vehicle acceleration in bounce, pitch and roll along with suspension displacement are the multiple parameters blended into single objective function to be minimized through proper allocation of weightages to each sub-objective based on real implications. The modified suspension system with optimum parameters results in improvement in the dynamic characteristic. Computer simulation through MATLAB-Simulink is providing an approximate solution against expensive and time taking experimentation.
Computational Analysis of Dissimilar Materials Engine Valve: Technical Note
Authors: Ramanan N. , Periyasamy P. , Sharavanan S. , Naveen E.
Published: September 2019

Engine exhaust valve are exposed to severe thermal loads and chemical corrosion. Exhaust valve opens and closes 2000 times per mile for passenger cars. Generally the material for manufacturing exhaust valve and exhaust valve seat insert have properties for working at high temperature continuously and resistance to corrosion due to their surrounding environment. Usually engine valve is made up of austenitic steels. This valve is to be replaced by a light weight dissimilar materials preferably by an Al6061 and FE 430 steel. In this paper, computational fluid dynamic analysis of such valve is presented. The flow characteristics and strength of the valve are assessed.