bluuebunny/crossref_metadata_2025 huggingface dataset:
FORAMINIFERA BENTIK PADA PADANG LAMUN DI KAWASAN PANTAI SEKITAR PULAU BUNAKEN SULAWESI UTARA
Authors: Kombo Feby GB , Mamuaja Jane M , Rampengan Royke M , Wagey Billy Th , Sondakh Calvyn FA , Pangkey Henneke
Published: July 2019

Benthic foraminifera lives on the seaflor and some of them are attached to plant stem. This organisms use pseudopodia to move. The study aims to describe the groups of foraminifera that live on leaves and seagrass sediments and provide information on the comparison of the number of benthic foraminifera genera in seagrass beds. The study was performed in Bunaken Island and during the study a number of 4593 specimens of benthic foraminifera has been identified and they are divided into specimen that lives on seagrass leaves (1097 specimens) and specimens that live on sediments (3496 specimens). The specimen was grouped in 16 genera and they were scattered in 2 stations within four sampling points. These genera are: Amphistegina, Calcarina, Coscinospira, Elphidium, Eponides, Lachlanela, Marginophora, Neorotalia, Operculina, Cleroplis, Planorbulina, Pseudorotalia, Quinqueloculina, Sorites, Spiroluculina, and Triloculina. Benthic foraminifera in seagrass leaves consist of 16 genera which are characterized by the genus Marginophora and Amphistegina and those live in substratum consist of 14 genera which was characterized by the genus Amphistegina.Keywords : Benthic Foraminifera, Seagrass beds, Bunaken Island
UJI AKTIVITAS ANTIBAKTERI BEBERAPA SPONS DARI PERAIRAN SALIBABU KEPULAUAN TALAUD
Authors: Maradou Remus B , Losung Fitje , Msngindaan Remmy EP , Lintang Rosita AJ , Pelle Wilmy E , Sambali Hariyani
Published: July 2019

Sponge is one component of coral reefs that has the potential as a bioactive compound but has not been widely used. This study was directed to obtain some spongy crude extracts from the Salibabu waters of the Talaud Islands, determine the antibacterial activity of some crude extruded sponges and compare the antibacterial activity of the sponge fraction against E. coli and S. aureus test bacteria. The results of identification of sponges were found in three species consisting of: Siphonodictyon sp., Ircinia sp., Dysidea sp. The antibacterial activity of crude extract, water, methanol and hexane fractions using agar diffusion method with E. coli and S. aureus test bacteria. The crude extract of siphonodictyon sp and the water fraction of this extract show the highest antibacterial activity.

Key words: Spons, Antibacterial, E. coli. S. aureus
Youth Participation in Forestry Education in Nigeria
Authors: Areo Samuel Olusola , Oyewale O O , Oyewumi O R
Published: July 2019

The concept of forestry education cuts across all its facets that is, the professional, technical and vocational. In view of continuous technological changes, forestry education must not be static. It must be versatile in order to be able to meet evolving contemporary challenges. This can be attested to by the great transformation in curriculum development between 1963 and 1986. Though there are presently 20 Universities in Nigeria offering forestry and allied courses, this has not actually impacted on students’ enrolment. This scenario poses enormous challenges to forestry education. Therefore, in order to reposition forestry education in Nigeria, this paper suggested among other factors that forestry curricula should be well positioned, flexible and adaptable; forestry teachers should be made to undertake pedagogical studies for effective teaching delivery; establishment of forestry education at secondary school level and funding, which is very crucial to an effective delivery of forestry education should be made readily available. The study therefore concluded by stressing the need for massive public enlightenment on forestry education and its prospects. There is a need for forestry education to be repackaged to make it more competitive in terms of student enrollment and future career options. There is also an urgent need to review the curricula of forestry courses in many secondary schools and introduced into curriculum. Forestry education in Africa must graduate from the current theory-based learning process to include much of the needed practical training.
Penerapan Algoritma SAGE pada Pengukuran Kanal Indoor Menggunakan SDR-USRP
Authors: Musayyanah Musayyanah
Published: July 2019

Komunikasi Koperatif Nirkabel membentuk system komunikasi virtual array MIMO, yang dapat meningkatkan kecepatan pentransmisian data, kecepatan tersebut dipengaruhi oleh kondisikanal, oleh sebab itu dibutuhkan analisis kondisi kanal. Kondisi suatu kanal dapat diindentifikasi dengan mengetahui karakteristik parameter fisikkanal, yaitu delay, sudut, dan amplitude kompleks. Deteksi parameter fisik kanal dari pengukuran kanal indoor maupun outdoor menggunakan metode dengan tingkat akurasi tinggi, seperti Space Alternating Generalized EM (SAGE). Penelitian ini mengimplementasikan SAGE untuk mendeteksi parameter sudut yang terdiri dari Direction of Arrival (DoA) dan Direction of Departure (DoD) menggunakan perangkat komunikasi Software Define Radio (SDR), yaitu Universal Software Radio Peripheral (USRP) yang dapat mendeteksitiga sinyal dari pengukuran kanal indoor. Hasil SAGE divalidasi terhadap hasil Ray Tracing, dimana rata-rata kesalahan untuk deteksi DoD adalah 36.3% sedangkan DoA sekitar 29.3 %.
Rancang Bangun Sistem Informasi Geografis Lokasi Debitur Berbasis Web
Authors: Mamulak Natalia Magdalena R
Published: July 2019

Di dalam proses pembayaran kredit banyak terdapat masalah, diantaranya adalah pencarian lokasi debitur yang pembayarannya lambat, beberapa debitur yang lokasi tempat tinggalnya berpindah-pindah karena adanya debitur yang masih menggunakan KTP sementara. Hal ini menyebabkan karyawan dealer sulit menemukan lokasi debitur untuk melakukan penagihan kepada debitur yang bermasalah. Oleh karena itu, dibangun sebuah sistem informasi geografis yang dapat membantu karyawan dalam pencarian lokasi debitur. Tools yang digunakan dalam membangun aplikasi ini adalah bahasa pemrograman PHP 7 dan database MySQL.Dalam penelitian ini menggunakan metode pengembangan Software Development Life Cycle (SDLC) model Waterfall. Model waterfall memiliki lima tahapan yaitu analysis, design, coding, testing dan maintenance.Hasil dari penelitian ini adalah aplikasi yang dapat mendeteksi lokasi debitur yang pembayarannya melewati jangka waktu kredit (lambat) dan debitur yang pembayarannya lambat (membawa lari sepeda motor) tetapi belum melunasi pembayaran ke pihak dealer.
Sistem Informasi Manajemen Hubungan Pelanggan Berbasis Web Pada PT. Arya Media Tour & Travel
Authors: Hakim Ahmad Azizul , Pratama Singgi , S Fransiska Prihatini
Published: July 2019

Tour & Travel merupakan perusahaan yang bergerak di bidang jasa dan pelayanan pariwisata di dalam dan layanan luar negeri, pemesanan tiket pesawat, pemesanan hotel, rental mobil, dan layanan haji/umroh. Perusahaan ini mengalami keterbatasan media informasi promosi, akibatnya pelanggan kurang mengetahui informasi secara lengkap dan benar. Selain itu perusahaan ini dapat melakukan kustomisasi, akan tetapi pelanggan tidak banyak yang mengetahui hal tersebut. Keluhan pelanggan selama perjalanan sering kali tidak sampai langsung ke direktur, akan tetapi pelanggan selalu menyampaikannya ke tourguide. Pembangunan aplikasi untuk mengatasi masalah tersebut yaitu membangun sistem informasi manajemen hubungan pelanggan berbasis website dengan metode yang digunakan adalah metodologi iterasi yang terdiri dari fase perencanaan, fase analisis masalah, fase perancangan, fase implementasi, dan fase pemeliharaan. Aplikasi ini menggunakan bahasa pemograman PHP dan menggunakan program Notepad++ serta MySQL sebagai basis data. Dengan adanya aplikasi ini dapat membantu dalam penyampaian informasi serta membantu perusahaan dalam meningkatkan loyalitas pelanggan, menarik pelanggan baru dan mempertahankan pelanggan yang telah ada agar dapat membantu setiap proses pemasaran yang dilakukan oleh perusahaan.
Microinjertos en sello de heridas crónicas recalcitrantes
Authors: Pérez Jerónimo Laura , Conde Montero Elena , Peral Vázquez Alicia , Guisado Muñoz Soledad , Villar Espantoso Mª Paz , Izquierdo Nazar Mª Isabel
Published: July 2019

Las heridas crónicas disminuyen la calidad de vida de los pacientes que las padecen, incidiendo significativamente en su estado de salud y agravando su pronóstico general. La elevada incidencia y prevalencia de las úlceras en pierna, así como su alta cronicidad y recidiva, suponen un impacto psico-socio-sanitario elevado, con un alto gasto sanitario y una importante carga personal, familiar y social asociadas. La cicatrización de estos defectos representan un reto terapéutico para el personal sanitario, tanto en el primer eslabón asistencial como en hospitales.La cobertura de las heridas crónicas con microinjertos cutáneos en sello es una técnica eficiente, con muy buenos resultados. Disminuye los tiempos de cicatrización y los costes del proceso, especialmente si se realiza de manera ambulatoria. Es una técnica sencilla, beneficiosa per se para la epitelización por la cantidad de factores de crecimiento, células y otras moléculas que de los pequeños fragmentos de piel, se liberan sobre el lecho de las heridas. Otro de los beneficios que podemos atribuir a los microinjertos autólogos en sello es su efecto analgésico desde las primeras horas de su colocación.
Compresión inelástica en una paciente con úlcera mixta
Authors: Contreras Fariñas Raquel
Published: July 2019

En el contexto clínico de la atención a pacientes con úlceras de etiología venosa, la compresión con vendas o medias se plantea como la principal herramienta terapéutica, con una evidencia científica de nivel 1A. Tradicionalmente, la existencia de algún componente de insuficiencia arterial en el paciente, lo que se corresponde con un Índice tobillo brazo menor a 0’8, se ha considerado una contraindicación para el uso de terapia compresiva. Sin embargo, en nuestra realidad profesional nos encontramos en determinadas situaciones clínicas en las que es preciso revisar nuevamente todas las alternativas para poder brindar al paciente la mejor atención posible.En este artículo se plantea el caso clínico de un paciente con úlceras venosas en ambas piernas y con índice tobillo-brazo de 0.55, donde todos los intentos terapéuticos previos habían fracasado.Los objetivos planteados a la hora de diseñar este estudio fueron: General: Encontrar una alternativa terapéutica para un paciente con úlceras de etiología mixta, alto nivel de exudado e ITB de 0.55. Específico: Revisar el nivel de evidencia disponible que respalde el uso de la terapia compresiva (TC) cuando existe patología arterial concomitante .Para ello se realizó una búsqueda bibliográfica en bases de datos nacionales e internacionales, y posteriormente se realizó la extrapolación de los resultados encontrados a la práctica clínica.Tras las búsquedas realizadas se obtuvieron diversos artículos que respaldan el uso de la terapia compresiva con baja elasticidad en casos de insuficiencia arterial. Tras la aplicación de la misma, los beneficios en cuanto a los distintos parámetros como exudado, biofilm y cicatrización fueron evidentes.

Estos resultados confirman los hallazgos encontrados en la bibliografía. Se puede decir que existe evidencia científica que respalda el uso de la contención, o compresión inelástica, como alternativa eficaz y segura para el tratamiento de úlceras de etiología mixta.
Autocuidado de una úlcera de etiología venosa versus cuidado profesional. Análisis de costes mediante un caso clínico
Authors: Homs-Romero Èrica , Romero-Collado Ängel
Published: July 2019

La insuficiencia venosa en extremidades inferiores afecta entre el 50-60% de la población adulta mundial y se es-tima que un 1% puede desarrollar una úlcera a lo largo de su vida aumentando el coste sanitario y mermando la calidad de vida de estos pacientes.Se ha realizado un estudio retrospectivo para comparar el análisis de costes directos de los autocuidados de una úlcera venosa por parte del paciente y sus familiares versus las curas de enfermería en un centro de Atención Primaria.Las curas realizadas por una enfermera con formación en heridas han permitido la cicatrización de una úlcera venosa de 50 años de evolución en 4 meses y medio con un coste total de 1600€, lo que equivale al coste de dos años y medio de autocuras de un paciente, las cuales, solo permitieron el mantenimiento de una úlcera abierta a lo largo del tiempo.
Evolución de los cuidados de las heridas quirúrgicas inguinales cerradas tras cirugía de endoprótesis o bypass arterial: una revisión narrativa
Authors: Carrasco Rodríguez Patricia , Muñoz Castellanos Jaime , Barrio Martín Eugenia , De Cabo Calvo Jesús , Granado Sánchez, et al Francisco José
Published: July 2019

Las heridas quirúrgicas inguinales cerradas cobran especial importancia debido a su particular tendencia a la infección tras cirugías de bypass y endoprótesis arteriales. Las complicaciones postoperatorias se acentúan sobre todo en personas con dificultades para la eliminación y/o con diferentes comorbilidades. La terapia de presión negativa es una de las alternativas de reciente consideración para la prevención de la infección de las heridas quirúrgicas vasculares de origen inguinal. Nos propusimos realizar una revisión de la evidencia existente acerca del uso de la terapia de presión negativa en la prevención de las infecciones de las incisiones quirúrgicas inguinales durante el postoperatorio de cirugía vascular. Las bases bibliográficas utilizadas fueron Medline, Cinhal y Embase. Se obtuvieron ocho artículos, de los cuales tres se dedican exclusivamente al abordaje inguinal. Existen escasos estudios experimentales y de calidad que se dediquen específicamente a evaluar la eficacia de la terapia de presión negativa en la prevención de las infecciones en heridas quirúrgicas inguinales frente a otros tipos de curas.
Abordaje de una laceración con hematoma a través de la Técnica Roviralta
Authors: Molina Carrillo Rubén
Published: July 2019

Una de las causas más importantes de lesiones cutáneas son los traumatismos espontáneos, y con ellos los hematomas subcutáneos. La técnica Roviralta se postula como una buena alternativa terapéutica frente al abordaje tradicional. Esta técnica busca, mediante la aplicación de heparina tópica de bajo peso molecular, disolver el hematoma de una forma rápida para así reducir y evitar complicaciones.Se presenta el caso clínico de una paciente de 77 años con diversas pluripatologías, entre ellas insuficiencia venosa crónica, obesidad mórbida, diabetes mellitus tipo 2 y ceguera. Para poder ofrecer el tratamiento más adecuado se consultó la literatura científica, encontrándose una fuerte evidencia que apoyaba el uso de terapia compresiva en insuficiencia venosa crónica y estudios que defendían la utilidad de la heparina de bajo peso molecular en el proceso de cicatrización. Los resultados de este caso clínico muestran la resolución del hematoma expuesto en trece días, tiempo inferior al referido en otros casos similares. Como conclusión, la terapia compresiva y la técnica Roviralta se podrían aplicar de manera conjunta para mejorar la evolución de este tipo de lesiones; no obstante, aún se requiere investigación adicional que apoye esta idea.
Factores de riesgo cardiovascular en pacientes intervenidos de estenosis carotídea en el Hospital 12 de Octubre
Authors: Manuel Garijo Raquel , Mora Pérez M Cruz , Brizuela Domínguez Cristina , Bustamante Guerrero Raquel
Published: July 2019

Objetivos. Analizar los factores de riesgo asociados a la estenosis carotídea en los enfermos operados por esta patología desde enero de 2013 hasta diciembre de 2017 en el Servicio de Cirugía Vascular del Hospital Universitario 12 de Octubre de Madrid.Material y método. Estudio descriptivo, retrospectivo observacional, en el que se analizan las historias clínicas de los pacientes intervenidos de estenosis carotídea para identificar los factores de riesgo asociados a esta patología.Resultados. 161 pacientes fueron intervenidos, con una media de edad de 72 años ± 9,68. Un 80% fueron hombres (n=129) y un 20% mujeres (n=32). El 44.7% de los casos tenía entre 70 y 80 años. En este rango se sitúa también el mayor porcentaje de enfermos sintomáticos, correspondiendo estos a un 55.3% (n=89) del total de la muestra. La hipertensión y la dislipemia fueron los factores más prevalentes. La sintomatología previa y la hipertensión guardan una relación significativa (p≤0,05), así como el ser fumador o exfumador y ser hombre.Discusión-conclusión. Los factores de riesgo identificados en la bibliografía fueron encontrados en la muestra de estudio. Todos presentaban algún factor de riesgo. El control de dichos factores es un aspecto importante del tratamiento médico.
Abordaje interdisciplinar de una úlcera en miembro inferior con vendas de baja elasticidad
Authors: Victoria Romo Sandra , Sancho Llorente Sara María , Mota San José Isabel , Alcaide Carrillo David
Published: July 2019

Introducción: Usuario derivado a la Unidad de Heridas de la Gerencia de Asistencia Sanitaria de Segovia, de 65 años de edad, residente en institución sociosanitaria, que presenta 2 lesiones posflebíticas contiguas en zona maleolar externa de la pierna izquierda. Con el presente trabajo se ha evaluado, a través de un caso clínico, el abordaje de las úlceras de etiología venosa con un vendaje de baja elasticidad desde un aspecto coste-efectivo. Metodología: Se empleó vendas de baja elasticidad para el tratamiento de la lesión, conjuntamente con apósitos primarios seleccionados en función de la evolución de la lesión. Resultados: Se consiguió el cierre completo de la lesión sin complicaciones en 4 meses y 14 días. El coste del tratamiento fue de 910,68 Euros. Conclusiones: El uso de terapia de baja elasticidad muestra ser coste-efectiva.
Effects of weed management on soil mites in coffee plantations in a Neotropical environment
Authors: Marafeli Patrícia de Pádua , Reis Paulo Rebelles , Ferreira de Oliveira Bernardi Leopoldo , de Alcântara Elifas Nunes , Martinez Pablo Antonio
Published: July 2019

Environmental disturbance, as a result of land use change and/or different agricultural practices, may have negative impacts on the richness and abundance of edaphic mites. The objective of this study was to evaluate the effects of different weed management methods in coffee plantations on edaphic mites, and to compare these results with mite communities of native forest habitats in southeastern Brazil. Soil samples were taken between the rows of a coffee plantation under different weed management methods, such as without weeding, manual weeding, agricultural grid, contact herbicide (glyphosate), residual herbicide (oxyfluorfen), mechanical tiller, and mechanical mower, and in a native forest area. Weed management affected edaphic mite communities, with the residual herbicide treatment having the greatest impact on species composition, abundance, richness and diversity. The use of manual weeding and the maintenance of unweeded areas were the practices that preserved mite communities closest to those found in native forest habitats. Thus, such practices are recommended as best practices in coffee plantations. Among the studied mites, the groups Oribatida and Mesostigmata were found in all sites, presenting the greatest abundance and richness, and were sensitive to different forms of weed control. On this basis, we suggest these groups as indicators of soil quality in coffee plantations.
Three new species of Macrophya Dahlbom (Hymenoptera, Tenthredinidae) with a key to species of the Macrophya imitator group in China
Authors: Li Zejian , Liu Mengmeng , Wei Meicai
Published: July 2019

The Macrophyaimitator group was proposed by Liu et al. in 2015. Three new species, Macrophyalonglingensissp. nov., M.nieshuaiguoisp. nov. and M.zejianisp. nov. from China are described. A key to all Chinese species and a geographical distribution map of the M.imitator group in China are provided.
Surgical Management of Suprachoroidal Hemorrhage in Younger Patients
Authors: Wood Edward H. , Moinuddin Omar , Rao Prethy , Drenser Kimberly A. , Trese Michael T. , Capone Antonio
Published: July 2019

Suprachoroidal hemorrhage (SCH) is a rare but serious complication that may accompany nearly any ocular surgery. In contrast to SCH in adults, the incidence and management of SCH in the pediatric population is poorly defined. Herein, the authors describe their experience managing SCH in patients of a younger age group, characterize this rare complication using multimodal imaging, and review the current literature on the subject. In this retrospective case series, two patients developed intraoperative SCH during cataract extraction once rendered aphakic.

[
Ophthalmic Surg Lasers Imaging Retina
. 2019;50:454–458.]
Accidental Globe Perforation During Posterior Sub-Tenon's Injection of Triamcinolone Acetonide
Authors: Singh Simar Rajan , Dogra Mohit , Singh Ramandeep , Dogra Mangat Ram
Published: July 2019

Complications of posterior sub-Tenon's steroid injections like glaucoma, cataract, sub-conjunctival hemorrhage and ptosis are well known. The authors present this photo essay to highlight a rare but serious complication of globe perforation secondary to posterior sub-Tenon's triamcinolone injection and describe its management.

[
Ophthalmic Surg Lasers Imaging Retina
. 2019;50:466–467.]
Role of Social Media in Terrorism Crisis Communication
Authors: Kimotho Stephen Gichuhi , Nyarang'o Carolyne Nyaboe
Published: July 2019

Terrorism targeting corporate bodies remains one the greatest risks to the most critical intangible asset of any organization: reputation. Thus, effective crisis communication is critical during and after terror crisis to mitigate further damage on the reputation. To date, many studies around the globe have tended to focus on the role of the traditional media during terror crisis, paying minimal attention to organisations' use of social media during terror crisis. Using a descriptive qualitative case study, this study examined the role of social media during 2013 Westgate Mall terror attack, in Nairobi, Kenya. Findings revealed that the Interior Ministry (IM) used Twitter as the preferred social media platform to communicate with various stakeholders. Accommodative crisis response strategies were the most used by the IM. However, the ministry was plagued with inaccuracies and inconsistencies in its responses on social media compromising reputation of the government further. Balancing the need for speedy response, accuracy and consistency, remained the greatest challenge for the IM.
Conceptual Framework for Enhancing the Implementation of Specific Microfinance Policies in Sub-Sahara Africa
Authors: Quao Kwami Hope
Published: July 2019

Deficient policy formulation processes and inadequate monitoring and supervision remain factors impeding the growth of microfinance in sub-Saharan Africa. This article explores issues mitigating policy implementation for microfinance institutions to propose a framework that will integrate stakeholders in the microfinance sector for effective financial policy implementation and promotion of microfinance performance and growth. The article proposes financial monitoring policy ownership structure and argues for the creation of an independent national microfinance supervisory authority as an alternative to ensuring effective implementation of microfinance policies in Ghana. This framework, the authors argue, will enhance stakeholder engagement in police formulation and create the necessary implementation environment, with adequate information, in which policy implementation for microfinance will flourish.
Using Social Media as a Tool for Learning in Higher Education
Authors: Woods Kathryn , Gomez Melissa , Arnold Michelle Gadson
Published: July 2019

The use of social media has become ubiquitous in many industries, including higher education. Emerging research shows that incorporating various social media platforms into course instruction can increase student interest, participation, and engagement as well as provide instructors and students with multiple platforms for communication and research that can be used to enhance the sense of community in an online group. This study determined whether various groups of students had differing attitudes toward using social media for class assignments. The recommendations provided are intended to help instructors interested in using social media for class assignments to learn more about how various student groups perceive this practice.
A Study on Lead Adsorption by the Hen Egg Shells from Enshi, Hubei Province, China
Authors: Gong Heng Heng , Li Tao , Zhang Wen Ya , Liao Zhao Jiang
Published: July 2019

The hen egg shells (HES) from EnShi, HuBei Province, China, which contain selenium, are used as adsorbent for the adsorption of lead ion from its aqueous solutions. The selenium in the HES could help to remove lead from its aqueous solution. The HES had been found to be the more efficient in the experiment and removed about 95% of lead from its aqueous solution. The final concentration of lead ion was found lower than the waste water quality standards from the initial concentration of lead ion 100.0 mg/L through these two steps of adsorptions. One gram of the HES can adsorb nearly 31.71±0.040 mg of lead ions. The adsorption kinetics was fitted by first-order model throughout the period. The present adsorption process is spontaneous, indicating HES can be availably used for the removal of lead ions from its aqueous solution.
Antibacterial Activities of Zinc Oxide Nanostructures with Different Structures
Authors: Rivera Rolen Brian P. , Potestas Melchor J. , Madamba Ma. Reina Suzette B. , Capangpangan Rey Y. , Linog Bernabe L. , Basilia Blessie A. , Alguno Arnold C.
Published: July 2019

We report on antibacterial activities of Zinc oxide (ZnO) with different structures. Fast furrier transform infrared spectroscopy ZnO nanostructures showed peaks in the range between 450–600 cm-1 indicating the successful growth through the presence of Zn-O stretching. On the other hand, impurities such as zinc complexes might be present due to the appearance of peaks at 1110 cm-1, 1390 cm-1 and 1506 cm-1. Furthermore, SEM images revealed that nanorods and sea-urchin like nanostructures are present in the produced ZnO nanostructures. Nanorods exhibit a better antibacterial response than the sea-urchin like structure. The change in structural morphology along with its purity has greatly influenced the area of bacterial inhibition zone during antibacterial testing.
Study on the Optimization of Process Parameters for Absorbable Bone Plate with In-Mold Heat Treatment
Authors: Wang Wen Teng , Lin Yu Chen
Published: July 2019

Titanium alloy & stainless steel are major materials for bone fracture fixation such as bone screws and plates in today's medical devices. However, the fixation devices made of metal not only have the risk of metal ion release to cause human allergies, but they also need to be removed by a second surgical operation making pain and the risk of the patient’s wound infection after the bone fracture healing. The biodegradable Polylactic Acid (PLA) bone screws & bone plates have the great advantage of not needing a second operation, but their insufficient strengths make them not be widely used in the current bone fracture fixation. In the study, we use PLA as the matrix and in-mod heat treatment with induction coils to increase the strength of bone screw & plate by improving crystallinity of material. Regarding ASTM F2502 “Standard Specification and Test Methods for Absorbable Plates and Screws for Internal Fixation Implants”, we measure bending loads of test pieces before and after in-mold heat treatment, and obtain the optimized process parameters by Taguchi method that will increase the bend load of PLA bone plates by 34.82%. These optimal parameters are the injection speed of 80 mm/s, the melt temperature of 205 °C, the heat treatment temperature of 110 °C and heat treatment time of 20 min.
Temperature-Dependent Plastic Deformation Behavior of Cu-Ni Alloys: Coupled Influence of Stacking Fault Energy and Short Range Clustering
Authors: Wang Ying , Han Dong , Li Xiao Wu
Published: July 2019

The uniaxial tensile tests were conducted at different temperatures to explore the coupled influence of stacking fault energy (SFE) and short-range clustering (SRC) on the plastic deformation behavior of Cu-Ni alloys. The results demonstrate that the ultimate tensile strength and uniform elongation decrease with increasing temperature due to the competitive influence of SFE and SRC. Dynamic strain aging (DSA) effect is observed at 200 and 250°C, and such an effect becomes more notable with increasing Ni content. The occurrence of DSA effect is thought to be caused by pinning of moving dislocations by SRC and diffusing solute atoms. The plastic deformation mechanisms for Cu-Ni alloys is mainly governed by wavy slip of dislocations at different temperatures, since the SFE of Cu-Ni alloys are very high especially at high temperatures, and the effect of SRC can be nearly ignored.
Atopobium vaginae: a literature review, on findings and potential clinical implications
Authors: Mariano Andrea , Salzo Angelo , Felice Valentina , Scutellà Massimiliano
Published: July 2019

Atopobium vaginaeis an anaerobic Gram-positive bacterium. It is recognized as a causal agent of bacterial vaginosis onset and occasionally associated to gynaecologic-obstetric complications (including pelvic inflammatory disease, endometritis, tubo-ovarian abscesses and preterm delivery with neonatal consequences). Additionally, bacteraemia and invasive infections have rarely been reported. The scientific and technological progress allowed an accurate and rapid identification of Atopobium vaginae supporting diagnosis and clinic interventions. In this article, literature has been deeply examined to report the state-of-the-art on Atopobium vaginae, which might be useful in clinical scenarios.
Precooling, Hyperthermia, and Postexercise Cooling Rates in Humans Wearing American Football Uniforms
Authors: Taylor Jeremy , Miller Kevin C.
Published: July 2019

Context

Exertional heatstroke is one of the leading causes of death in American football players. Precooling (PC) with whole-body cold-water immersion (CWI) may prevent severe hyperthermia and, possibly, exertional heatstroke. However, it is unknown how much PC delays severe hyperthermia when participants wear American football uniforms during exercise in the heat. Does PC alter the effectiveness of CWI once participants become hyperthermic or affect perceptual variables during exercise?

Objectives

We asked 3 questions: (1) Does PC affect how quickly participants become hyperthermic during exercise in the heat? (2) Does PC before exercise affect rectal temperature (Trec) cooling rates once participants become hyperthermic? (3) Does PC affect perceptual variables such as rating of perceived exertion (RPE), thermal sensation, and environmental symptoms questionnaire (ESQ) responses?

Design

Crossover study.

Setting

Laboratory.

Patients or Other Participants

Twelve physically active males (age = 24 ± 4 years, height = 181.8 ± 8.4 cm, mass = 79.9 ± 10.3 kg).

Intervention(s)

On PC days, participants completed 15 minutes of CWI (9.98°C ± 0.04°C). They donned American football uniforms and exercised in the heat (temperature = 39.1°C ± 0.3°C, relative humidity = 36% ± 2%) until Trec was 39.5°C. While wearing equipment, they then underwent CWI until Trec was 38°C. Control-day procedures were the same except for the PC intervention.

Main Outcome Measure(s)

Rectal temperature, heart rate, thermal sensation, RPE, and ESQ responses were measured throughout testing. The duration of cold-water immersion was used in conjunction with Trec to calculate cooling rates.

Results

Precooling allowed participants to exercise 17.6 ± 3.6 minutes longer before reaching 39.5°C (t11 = 17.0, P < .001). Precooling did not affect postexercise CWI Trec cooling rates (PC = 0.18°C/min ± 0.06°C/min, control = 0.20°C/min ± 0.09°C/min; t11 = 0.9, P = .17); ESQ responses (F2,24 = 1.3, P = .3); or RPE (F2,22 = 2.9, P = .07). Precooling temporarily lowered thermal sensation (F3,26 = 21.7, P < .001) and heart rate (F3,29 = 21.0, P < .001) during exercise.

Conclusions

Because PC delayed hyperthermia without negatively affecting perceptual variables or CWI effectiveness, clinicians may consider implementing PC along with other proven strategies for preventing heat illness (eg, acclimatization).
Inkomstebelastinghantering van korting ontvang in die hande van 'n nie-handeldrywende persoon
Authors: Brink Sophia
Published: July 2019

For income tax purposes, a taxpayer operating a business will account for discount received differently from a taxpayer not operating a business. When a taxpayer operating a business obtains goods or services at a discount, the taxpayer can claim a section 11(a) deduction at the value of the goods or services, net of the discount received. The discount reduces the value of the net reduction of taxable income and the taxpayer is effectively taxed on the discount received. A taxpayer who is not operating a business will not qualify for a section 11(a) deduction (read together with section 23(g)) for goods or services obtained (it does not meet the requirements ‘for the purposes of trade’ and ‘in the production of income’). Discount received in the hands of a non-trading person (often a natural person) is currently not subject to normal South African income tax. The main objective of this article is to investigate whether the existing provisions in the Income Tax Act No. 58 of 1962 and related case law provide a basis for taxing discount received in the hands of the non-trading individual. In order to meet this objective, local literature was analysed to determine the correct income tax treatment and it was found that discount received by a non-trading person meets all the requirements of the ‘gross income’ definition and consequently should be taxable.
The relationship between Double Taxation Agreements and the provisions of the South African Income Tax Act
Authors: Costa David , Stack Lilla
Published: July 2019

This article investigates the legal status of Double Taxation Agreements, and the relationship between Double Taxation Agreements, which are concluded in terms of section 108 of the Income Tax Act, and the provisions of the Income Tax Act (taking into account the provisions of the Constitution, and the national and international rules for the interpretation of statutes). An important conclusion reached was that as the Vienna Convention on the Law of Treaties represents customary international law and as such forms part of South African law, the principles contained in the treaty should be taken into account when interpreting South African legislation (including Double Taxation Agreements). The final conclusion of the research was that Double Taxation Agreements have a dual nature – forming part of domestic legislation and being classified as international agreements. The provisions of the Double Taxation Agreement should be taken as overriding any conflicting legislation in the Income Tax Act.
How pre-admission characteristics affect the performance of CTA students at a South African university
Authors: Steenkamp Gretha
Published: July 2019

The completion of a Certificate of Theory in Accounting (CTA) is an essential and challenging part of qualifying as a chartered accountant (CA) in South Africa. The objective of this research was to determine how certain pre-admission student characteristics impact CTA performance at a South African residential university (Stellenbosch University). Current CTA students were asked to complete a questionnaire, which requested information regarding the characteristics that they possessed upon admittance into the CTA programme. Past performance in undergraduate studies showed the strongest correlation with CTA performance, and is thus a valid admission criterion. Characteristics that relate to reduced performance in CTA studies include: not completing the undergraduate programme in the minimum amount of time, being an extrovert, underdeveloped literacy skills and focusing on the details rather than the big picture. Such students are at risk and could benefit from targeted interventions.
Tax risk-management analysis: Comparison between the United States of America, the United Kingdom and South Africa
Authors: Segal Talya , Maroun Warren
Published: July 2019

Tax risk-management (TRM) is a little-studied area of corporate governance, despite the proliferation of ever more complex tax legislation that can have a material impact on the sustainability of organisations. In this light, the aim of this research is to explore policies and procedures relied on by tax authorities in the United States of America, the United Kingdom and South Africa to encourage a culture of compliance with tax laws. For this purpose, the research differentiates between specific and generic tax risks. These include transaction, operational, compliance, financial accounting, portfolio, management and reputation risk. The study highlights how each TRM-related policy or programme addresses these tax risks and compares the TRM systems in the three jurisdictions.
Education programmes' responsibilities regarding pervasive skills
Authors: Strauss-Keevy Monique
Published: July 2019

The Competency Framework of the South African Institute of Chartered Accountants (SAICA) details specific competencies, but also places emphasis on the pervasive skills that need to be attained by candidates in order to qualify as South African chartered accountants (CAs (SA)). This article presents the results of a literature review and empirical work that provides conflicting results as to whether the education, the training or a combination of the programmes are responsible for ensuring that aspirant CAs (SA) are equipped with pervasive skills. This study returned significant findings, indicating that SAICA-accredited academics are not aware of their responsibility to ensure that aspirant CAs (SA) have achieved all the competencies as set out in SAICA’s Competency Framework. While this apparent shortcoming may exist, it is the responsibility of the Heads of Academic Departments and SAICA alike to further inform academics that the onus to transfer both competencies (specific and pervasive) rests predominantly with them.
Comparing South African annuity options at retirement
Authors: De Villiers-Strydom Jeanie , Krige Niel
Published: July 2019

In this study various annuity strategies are compared for South African males who retired during the 30 years from 1960 to 1989. To this end, the present values of the monthly cash flows provided by 47 different annuity strategies are calculated and compared in order to ascertain which strategy would have provided the largest financial benefits. In contrast to previously held general beliefs, the calculations demonstrate that living annuity strategies are superior to composite annuity strategies, which in turn outperform switching annuity strategies, whereas life annuities yield the lowest return.
Happiness among first-year students at a comprehensive tertiary institution: An exploratory study
Authors: Pretorius Marinda , Blaauw Derick
Published: July 2019

The 1970s saw a significant increase in the volume of research on individuals’ subjective experience of well-being. The subjective well-being of university students has received less attention, however. Student well-being is important, given the widespread concern over the high dropout rates at institutions of higher learning in South Africa (Council of Higher Education, 2013; Van Zyl, 2010). The paper adds to the existing body of literature through an exposition on the possible influence of variables forthcoming from the literature, on the overall subjective well-being of first-year economics students at a comprehensive university. Variables that displayed a significant and positive contribution to subjective well-being were first-year and extended-degree students, the university being the institution of choice, feeling at home, knowing exactly how the university functions, and watching or participating in sport. Variables that were found to be significant with a negative contribution to subjective well-being levels were: worries about tests, studying less than 10 hours per week and, interestingly, living on campus.
Facts about AIDS for physiotherapists: Acquired Immune Deficiency Syndrome
Authors: Kotkin Nadine
Published: July 2019

No abstract available
О максимизаторах оператора свертки в пространствах $L_p$
Authors: Kalachev Gleb Vyacheslavovich , Sadov Sergey Yur'evich
Published: July 2019

Рассматривается оператор свертки в $\mathbb R^d$ с ядром из $L_q$, действующий из $L_p$ в $L_s$, где $1/p+1/q=1+1/s$. Доказано, что при $1<q,p,s<\infty$ существует максимизатор - функция с единичной $p$-нормой, на которой достигается верхняя грань $s$-нормы свертки. Отдельно проанализированы случаи, когда один из показателей $q$, $p$, $s$ равен $1$ или $\infty$.
Библиография: 12 названий.
Qualidade da água como reflexo de atividades antrópicas em bacias hidrográficas do Nordeste, Brasil
Authors: Silva Adriana Maria Cunha , Cunha Maristela Casé Costa , Lopes Denise Vieira
Published: July 2019

A sustentabilidade hídrica constitue em fator primordial para o desenvolvimento dos grupos humanos. Este trabalho teve como objetivo avaliar os Índices de Qualidade da Água (IQA), Estado Trófico (IET), Balneabilidade (IB) e o da Comunidade Fitoplanctônica (ICF), das bacias hidrográficas dos rios São Francisco, Paraíba, Pajeú e Moxotó. As informações foram disponibilizadas pelo Ministério da Integração Nacional Brasileiro referente a coletas no período de 2013/2014. pH, turbidez, oxigênio dissolvido, coliformes termotolerantes, DBO, fósforo total e clorofila-a apresentaram resultados fora dos limites estabelecidos pela Resolução CONAMA nº 357/2005 para águas classe II. Os resultados evidenciam a influência antrópica na qualidade da água dos rios e reservatórios avaliados, e servem como subsídio para o desenvolvimento de pesquisas na gestão dos ecossistemas hídricos do semiárido brasileiro.
Análise da relação da dinâmica da paisagem com a crise hídrica em Iraí de Minas/MG
Authors: Araújo Aracy Alves , Ferreira Janderson Cristian , Silva Claudionor Ribeiro
Published: July 2019

O município de Iraí de Minas/MG passou por um intenso processo de expansão agropecuária e por uma crise hídrica no abastecimento urbano. O objetivo desse estudo foi analisar a dinâmica da paisagem e seus efeitos nos recursos hídricos, no período de 1984 a 2015. Para tanto, foi aplicada a aritmética de bandas espectrais: o NDVI (índice de vegetação da diferença normalizada) e a subtração de imagens nas cenas Landsat5/TM-1984 e Landsat8/OLI-2015. Os resultados comprovam uma forte alteração da paisagem, especialmente com a implantação da pecuária e agricultura mecanizada (passando de 14.01% para 70.78% da área total do município), fatores que acarretam o uso intenso da água e, consequentemente, na redução do nível d´água de um rio.
Agropecuária na região norte do Brasil: transbordamentos tecnológicos entre municípios
Authors: Reyna Edi Flores , Da Silva Rubicleis Gomes , Lírio Viviani Silva
Published: July 2019

Este trabalho tem como objetivo verificar a existência do efeito transbordamento de tecnologia do setor agropecuário entre os municípios da região Norte, bem como analisar os determinantes do valor de produção do setor em 2006. Para esse fim, foram utilizados métodos derivados da econometria espacial. Os resultados obtidos mostraram que no setor agropecuário da região Norte a variável mão-de-obra possui maior impacto sobre o valor de produção e que não existe transbordamento de tecnologia entre os municípios. Este pode ser explicado pela baixa densidade rodoviária na região e pela distância existente entre os estabelecimentos que não permitem a disseminação e compartilhamento de tecnologia. Contudo, verificou-se a existência de dependência espacial no termo de erro na agropecuária nortista.
Avaliação físico-química e microbiológica das águas da bacia hidrográfica do rio Paraíso Jataí-GO
Authors: Rocha Hudson Moraes , Cabral João Batista Pereira , Batista Daiane Ferreira , Oliveira Leandro Gonçalves
Published: July 2019

A atividade agropecuária é a principal consumidora e poluidora dos recursos hídricos, em que o desmatamento, a irrigação e os resíduos desta atividade são conduzidos à rede de drenagem. O presente trabalho teve como objetivo analisar espacial e temporalmente as características físico-química e microbiológica das águas superficiais do rio Paraíso, e realizar o enquadramento do corpo d’água de acordo com a resolução CONAMA n° 357/05. As coletas de água no rio Paraíso foram realizadas em períodos distintos do ano: uma no mês de agosto (período seco) e outra em novembro (período chuvoso). Os parâmetros avaliados foram: temperatura da água, potencial hidrogeniônico, condutividade elétrica, salinidade, turbidez, oxigênio dissolvido, coliformes fecais, fósforo e nitrogênio. Os resultados dos coliforms fecais e fósforo apontam que os trechos amostrais de água localizados nas áreas de agricultura apresentaram maior inadequabilidade de acordo com a Resolução CONAMA n° 357/05, sendo o rio classificado como de classe III.
Ground-based millimetre-wave measurements of middle-atmospheric carbon monoxide above Ny-Ålesund (78.9° N, 11.9° E)
Authors: Ryan Niall J. , Palm Mathias , Hoffmann Christoph G. , Goliasch Jens , Notholt Justus
Published: July 2019

Abstract. We present a new ground-based system for measurements of
middle-atmospheric carbon monoxide (CO) at Ny-Ålesund, Svalbard, and
the altitude profiles of CO volume mixing ratios (VMRs) measured during the
2017/2018 winter. The Carbon Monoxide Radiometer for Atmospheric
Measurements (CORAM) records spectra from CO spectral emissions in the
middle atmosphere with the aid of a low-noise amplifier designed for the
230 GHz spectral region. Altitude profiles of CO VMRs are retrieved from the
measured spectra using an optimal estimation inversion technique. The
profiles in the current dataset have an average altitude range of 47–87 km,
with special consideration to be given to data at >∼70 km altitude. The estimated uncertainty in the CO profile
peaks at ∼12 % of the a priori data used in the inversion. The
CORAM profiles are compared to co-located CO measurements from the Microwave
Limb Sounder (MLS) aboard the Aura satellite and show a difference of 7.4–16.1 %, with a maximum absolute difference of 2.5 ppmv at 86 km altitude.
CO profiles are currently available at 1 h resolution between November 2017
and January 2018. The instrument measures during Arctic winter because
summer time CO concentrations are so low as to be undetectable by CORAM.