bluuebunny/crossref_metadata_2025 huggingface dataset:
Internal crowdsourcing as an instrument of personnel involvement
Authors: Dolzhenko Ruslan
Published: May 2019

Purpose – in the study the opportunities to utilise crowdsourcing as an instrument of personnel involvement are considered. The essence of personnel engagement is analysed; the terms “personnel engagement” and “personnel involvement” are compared.

Research methodology – the case study of JSC “Sberbank”, the first Russian company that implemented internal crowdsourcing in its activity, is provided.

Research limitations – the paper considers the case of a large financial company; it is impossible to conclude the applicability of technology in other cases. However, this experience can be recreated by almost any organisation that embraces thousands of workers in its structure

Findings – personnel involvement is understood as a set of measures that forms employeesʼ abiding interest in solving organisational problems and an increased emotional attachment to the organisationʼs aims and values. The essence of crowdsourcing is defined, its implementation scheme is described, and the classification of crowdsourcing projects is developed. The authors highlight the advantages of the use of internal crowdsourcing, i.e. implemented through the efforts of the companyʼs staff, for the employees and the organisation itself.

Practical implications – examples of the application of this technology for resolving organisational issues and involving personnel are offered.

Originality/Value – the article studied the potential of using crowdsourcing in solving business issues.
Exploring the associations between institutional constraints and entrepreneur’s perception in future business climate
Authors: Çera Gentjan , Çera Edmond , Rozsa Zoltan
Published: May 2019

Purpose – although many studies emphasise that institutional environment shapes business activity, yet it is not clear enough how legal environment, tax administration and stimulation policies are associated with entrepreneur’s perception in the future business climate. This paper seeks to explore these associations in the context of a post-communist transition country.
Research methodology – the research takes an institutional perspective, and its analysis is conducted on a firm-level data collection through a face-to-face survey. Kruskal-Wallis test followed up by Jonckheere-Terpstra and Mann-Whitney tests, were employed in a dataset of 404 firms operating in Albania.
Findings – the analysis offers important insights into the nature of entrepreneurship in a post-communist setting. It was found a significant association between future business climate and legal environment and tax administration. Between stimulation policies and business climate was reported an insignificant association. High levels in the legal environment and tax administration lead to the less favourable future business climate.
Research limitations – though Albania has similarities with other transition countries in terms of regional, economic and political environments, the generalisation of these results to another context is limited.
Originality/Value – this research provides insights for scholars studying entrepreneurship in institutional transformation contexts, and it contributes to the accumulation of knowledge on transition countries by focusing on the little-studied case of Albania.
Personal income tax reform in Latvia: assessment of effect
Authors: Bule Larisa , Leitāne Līga , Rozīte Kristīne
Published: May 2019

Personal income tax (PIT) policy in Latvia has been changed significantly in 2018 with the aim to reduce the tax burden and increase the income of working population by amending progressive tax rates and increasing the non-taxable minimum and minimum wage.
Purpose − the aim of this study is to estimate the impact of PIT reform by assessing the effect of implementation of non-taxable minimum, deductions and substantiated spending on the dynamics of income and tax administration efficiency.
Research methodology − PIT theoretic and normative concepts have been analyzed; unpublished data on actual wages in 2015−2018 provided by Latvian State Revenue Service and State Social Insurance Agency have been estimated.
Findings − the main conclusion of this study is that the aim of the reform has not been achieved: income inequality hasn’t been reduced, an increase of income has been irrelevant, the gains from the reform have become unobtainable for the most unprotected groups because of the insufficient level of income. The implementation of the differentiated non-taxable minimum has generated PIT debts and higher administrative burden.
Practical implications − the study may be implemented in case of progressive PIT for the reassessment of the tax framework and its future development.
Originality/Value − this study is original, the actual effect of PIT reform in Latvia previously hasn’t been analyzed.
Business agility – new trend in business
Authors: Smolíková Lenka
Published: May 2019

This paper focuses on a new trend in management – business agility. This term is brand new in the field of
management, but agile practices are well known in project management, especially in the IT sector.
Purpose – the purpose of the paper is to clear the ify the relevance of a brand new topic – business agility. This purpose
will be divided into six partial purposes.
Research methodology – the research methodology consists of literature reviews as the first step followed by hypothesis
and questionnaire survey.
Findings – the findings and results derived from the research and reported at the end of the paper. The questionnaire
survey is carried out to support or disprove the hypothesis. The most significant chapters are finding results and conclusion.
Practical implications – the practical implications can be found in the model of business agility transformation that can
be used in business, the potential risk of business agility transformation and benefits related to business agility.
Research limitations – there is one research limitation and it is basically because there are not many companies that are
agile in the Czech Republic and the term of business agility is new and it can influence a number of the filled questionnaire.
Originality/Value – the originality and value can be seen in the contribution of this paper: the model of implementation
business agility into the company
Tadpole of Leptopelis ragazzii (Boulenger, 1896), Shoa Forest Tree Frog (Anura, Arthroleptidae)
Authors: Tiutenko Arthur , Zinenko Oleksandr
Published: May 2019

The tadpole of poorly studied Leptopelisragazzii (Boulenger, 1896), a high-altitude tree frog species from the Ethiopian highlands, is described for the first time and compared with closely related sympatric species – L.gramineus (Boulenger, 1898) and L.vannutellii (Boulenger, 1898).
Development of a chiral RP-HPLC method for identification of stereomers of newly synthesized xanthine-based hydrazide-hydrazone compound
Authors: Peikova Lily , Tzankova Diana , Dineva Alexandrina , Georgieva Maya , Zlatkov Alexander
Published: May 2019

A reversed phase enantio selective high performance liquid chromatographic method was developed for enantiomeric separation of 2-(1,3-dimethyl-2,6-dioxo-2,3-dihydro-1H-purine-7(6H)-yl)-N'-(3-fluorobenzylidene)-propanehydrazide isomers. The enantiomers of 2-(1,3-dimethyl-2,6-dioxo-2,3-dihydro-1H-purine-7(6H)-yl)-N'-(3-fluorobenzylidene)propanehydra-zide were resolved on a ACEÒEquivalenceTM С18 (250 × 4.6 mm, 5 μm) column using a mobile phase system containing methanol, water, phosphate buffer рН 7.4 (50:46:4 v/v/v). The resolution between enantiomers was found to be more than 2.0. The sample solution and mobile phase were found to be stable for at least 48 h. The final optimized method was successfully applied to separate the (R)- and the (S)-enantiomers of 2-(1,3-dimethyl-2,6-dioxo-2,3-dihydro-1H-purine-7(6H)-yl)-N'-(3-fluorobenzylidene)-propanehydrazide and was proven to be reproducible and accurate.
Utilization of Eggshell Ash for Removal of Organic Micro-Pollutants in Contaminated Water
Authors: Boonyaroj Varinthorn , Saramanus Sirichai
Published: May 2019

The rapid development of advanced technology in Thailand has resulted in an increased impact from micro-pollutant accumulation through wastewater. Phenolic compounds, generally originating from synthetic and plastic products, have been frequently detected in industrial and municipal wastewater. Releasing these compounds into the environment affects the human body at trace levels. In terms of economic perspective and environmental considerations, filtration is an appropriate process for wastewater treatment. In this research, filtration material made from eggshell ash was investigated for organic micro-pollutant removal. The mechanical strength of the derived filtration materials was evaluated in terms of compressive strength. For the fabrication process, the different proportions were composed in a range of 45% – 55% of eggshell ash. Eggshell ash contents could increase the porosity of the filtration specimen by heat at a temperature of 750 °C. The removal efficiency of filtration material approximately more than 80%. The ratio of 55% of eggshells showed better results with permeability value of 57±3.5 L/m2/h and compressive strength of 5.25 MPa.
Nutritional Properties, Antioxidant and Anti-Acetylcholinesterase Activities of Pleurotus ostreatus
Authors: Chamutpong Siriphatr , Pummarin Teerarat , Noysang Chanai
Published: May 2019

Pleurotus ostreatus, the worldwide edible mushroom, has a potent economic values and medicinal properties. In this study, nutritional properties, antioxidant, and anti-acetylcholinesterase activities of P. ostreatus were investigated. The extracts were prepared by maceration and soxhlet extraction with ethanol and decoction with distilled water. Nutritional analysis showed that P. ostreatus has high content of fibers (45.5%), proteins (20.8%) and carbohydrates (68.4%) with low content of lipids (0.56%). HPLC analysis revealed that P. ostreatus has high content of the potential health promoting of β-glucan (42.8%). Acetylcholinesterase (AChE) is a key enzyme in nervous system. Inhibition of this enzyme is used for the symptomatic treatment of Alzheimer’s disease (AD), the most common disease in aging population. Ellman colorimetric method was used to determine Acetylcholinesterase inhibitory (AChEI) activity. All extracts found containing high AChEI activity (IC50 = 1.75-5.91 mg/ml). Oxidative stress plays a major role in the pathogenesis of AD, thus antioxidant activity was also performed in this study. DPPH assay exhibited all P. ostreatus extracts had high antioxidant activity (IC50 = 0.59-5.47 mg/ml). The results suggested that P. ostreatus should be beneficial for AD treatment and the most efficient nutraceutical and functional foods.
The Effect of Sintering Temperature on Physical Properties of Leucite Ceramics
Authors: Tharajak Jirasak , Sanpo Noppakun
Published: May 2019

Leucite has been widely used as a constituent of dental ceramics to modify the coefficient of thermal expansion. This is most important where the ceramic is to be fused or baked onto metal. However, its physical property was unpredictable since it was sensitive to several parameters such as sintering temperature and concentration of raw materials. In this research study, leucite ceramic particles were synthesized by in-house sol-gel process. The morphology and size of our synthesized leucite particles were analyzed by SEM, vicker hardness and XRD, respectively. It was revealed that the sintering temperature played the important role on several properties of leucite ceramic particles.
Impacts of Current and Voltage Harmonics for Industrial Power Network
Authors: Rugthaicharoencheep Nattachote
Published: May 2019

Power quality (PQ) has become a more important issue recently due to the use of more sophisticated and sensitive equipment. Medical devices, telecommunication servers and equipment, manufacturing and domestic appliances rely on a good supply of power. This paper presents the review of the power quality in power system. Power quality has always been important for customers, but with increasing applications of electronic loads and controllers sensitive to the power quality, the subject has attracted renewed interest in recent times. Power quality encompasses several aspects: harmonics, over voltage, flicker voltage sags and swells interruptions etc. A major factor contributing to the importance of the quality of power is the deregulation of the power industry. Customers will demand higher levels of power quality to ensure the proper and continued operation of sensitive equipment and processes.
Optical Device Adapted to Smartphone for Direct Imaging Retinal Blood Vessels
Authors: Suvarnaphaet Phitsini , Suksan Phimonkhae , Pechprasarn Suejit , Albutt Naphat
Published: May 2019

To obtain the ophthalmic findings for diagnosis and treatment, the ophthalmologist has been allowed to observe with a handheld ophthalmoscope in which the medical photos of findings cannot be recorded. Here, the simple optical system has been designed and implemented a prototype using 3D printing that can adapt to the smartphone with conventional app camera for direct imaging retinal blood vessels. A plano-convex lens of +20D was used to adjust the lens power of the smartphone camera. The lens wheel containing 16 lenses ranging from-8D to +8D and blank of 0D was used to compensate for tolerances and errors in human-eye sight. As a result, the prototype was constructed and able to capture images of the retinal blood vessels (RBV) in subject’s eyes having been either nearsighted or farsighted vision. Using this optical technique can provide the simple, portable and inexpensive prototype adapted to smartphone and can take advantage of global networks resource for telemedicine.
Effect of Ammonium Sulphate ((NH4)2 SO4) on Microstructure and Mechanical Properties of SA-213-Gr.T22 and SA-210-Gr.A1 Steel in the Water Tube Boiler
Authors: Singhatham Papatsorn , Singhatham Chokchai , Peeratatsuwan Chaiyawat , Utaikaifa Torsak , Panya Niphaporn
Published: May 2019

This paper presents the effect of an Ammonium sulphate (NH4)2 SO4) leak mixed in the boiler feed water system on the microstructure, chemistry, metallurgy and mechanical properties of the water tube boiler. Tube specimens were water tube and super-heated tube materials made from ferritic-pearlitic steel alloy grade SA-210-Gr.A1 and ferritic steel grade SA213-Gr.T22, respectively. Specimens were obtained from different height levels of the boiler and tested. The results from the emission spectrometer revealed that the carbon (C) and sulfur (S) did not concentrate inside the tube during five days of operation. Whereas the operating temperature causes the change in the microstructure and mechanical properties due to a segregation of phase and change of mechanical properties (hardness and tensile) in the used tube.
Characterization of Physical and Mechanical Properties of Bleaching Paper from Rice Straw
Authors: Polyium Udomdeja , Boonyaratakalin Thanapan , Wichiranon Songsiri
Published: May 2019

This paper aimed to determine the characteristics of physical and mechanical properties of rice straw hand sheet and investigated the optimal conditions for making rice straw paper. The chemical composition of rice straw determined with the TAPPI standards. The conditions of making paper hand sheet composed of pulping time: 2 hours, 4 hours, pulping temperature: 100°C, 130°C, pulping solvent: 2 wt% NaOH, 4 wt% NaOH and bleaching: unbleached pulp, bleached pulp with 2% H2O2. The paper hand sheet was tested based on TAPPI methods, basic weight TAPPI- T410-om-93, thickness TAPPI- T411-om-89, moisture content TAPPI- T412-om-93, brightness TAPPI T452 om-92, opacity TAPPI standard T 425 om-91, burst strength TAPPI T403 om-97, tensile strength TAPPI T494 om-01, and tear strength TAPPI-T414-om-88. The results showed that the optimal conditions of rice straw hand sheet including pulping time: 2 hours, pulping temperature: 100°C, pulping solvent: 2 wt% NaOH, and bleaching: unbleached pulp gave the highest the physical and mechanical properties form other conditions. This conditions showed as the basic weight 62.27 g/m2, thickness 259.30 µ, opacity 93.34 ISO%, burst strength 64.75 kPa.m2/g, tensile strength 95.33 N.m/g, and tear strength 473.55mN.m2/g. In this condition, the paper hand sheet used at the lowest concentration of pulping solvent and non-bleached, which reduces environmental pollution.
Comparison of Conventional and Ultrasound-Assisted Extraction Techniques for Extraction of Phenolic Compounds from Coconut Husk
Authors: Nitiwattananon Attapon , Thanachasai Saipin
Published: May 2019

In this study, ultrasound-assisted extraction (UAE) was compared with conventional extraction methods, including conventional solvent extraction without agitation (CSE), conventional solvent extraction with agitation at 50 rpm (CSE50) and 150 rpm (CSE150), for the extraction of phenolic compounds from coconut (Cocos nucifera L.) husk. The extraction yield, total phenolic content (TPC) and total flavonoid content (TFC) were examined. The antioxidant capacity of C. nucifera extracts was determined by using 2,2’-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and 2,2’-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assays. Experimental results showed that UAE gave the highest extraction yield, TPC, TFC and antioxidant capacities (ABTS and DPPH), followed by CSE150, CSE50 and CSE, respectively. UAE was found to be more effective than conventional extraction methods. Conventional solvent extraction with higher agitation speed exhibited higher extraction efficiency than those with lower agitation speed and without agitation.
Comparison of Industrial Microwave Drying and Fluidized Bed Drying Techniques on the Quality of Jasmine Instant Rice
Authors: Phukasmas Patsakul , Songsermpong Sirichai
Published: May 2019

Nowadays, most people are living with busy schedule. Consequently, people have to select the most convenient option to save their time. Instant rice is considered as one of the possible solutions to serve most people present lifestyle. However, the problems with instant rice including slow rehydration and poor quality affect the consumer acceptability. This research focused on drying methods in order to improve the quality of instant rice. Two drying methods were investigated: Industrial microwave drying (IMD) and fluidized bed drying (FBD). The results of quality evaluation revealed that whiteness and texture of IMD had no significant difference with freshly cooked rice. In addition, IMD had better quality of product compared to FBD in term of texture and whiteness. IMD (6,400 watt, 2,450 MHz) was appropriate drying method to produce instant rice because of the fast rehydration time for 4 minutes by boiling water while FBD (85°C 60 min) took slower rehydration time for 9.5 minutes. Furthermore, after rehydration, the rice physical appearance of FBD and IMD were not coagulated and not broken and good quality. Therefore, instant rice processing by IMD is recommended for the instant rice production at the industrial scale.
Comparison between 1 g and 2 g of intrawound vancomycin powder application for prophylaxis in posterior instrumented thoracic or lumbosacral spine surgery: A preliminary report
Authors: Kunakornsawat Sombat , Sirikajohnirun Sirichai , Piyaskulkaew Chaiwat , Pruttikul Pritsanai , Kittithamvongs Piyabuth , Pongpinyopap Warongporn , Pluemvitayaporn Tinnakorn
Published: May 2019

Background: Surgical site infection (SSI) after instrumented spinal surgery is one of the most serious complications in spite of the routine use of prophylactic intravenous (IV) antibiotics. Many studies have suggested that intrawound vancomycin powder, applied during the intraoperative period, may decrease the incidence of SSI after surgery. However, the appropriate dose of vancomycin has not yet been reported. Purpose: The purpose of the study is to compare between the use of 1 g and 2 g intrawound vancomycin powder and to find out which of these two groups can reduce the rate of deep wound infection in posterior instrumented thoracic or lumbosacral spine surgery. Materials and Methods: The preliminary study was conducted from July 2013 to July 2015 at Lerdsin Hospital. A total of 400 patients were enrolled in the study, and their individual demographics were recorded. All patients underwent posterior instrumented thoracic or lumbosacral spine surgery. Of these, 131 patients received IV cefazolin and 2 g of vancomycin powder intrawound application, 134 patients received 1 g of intrawound vancomycin powder in addition to IV cefazolin, and 135 patients were given only IV cefazolin and were assigned as the control group. Results: One hundred and thirty-one patients were treated with posterior instrumented thoracic or lumbosacral fusions using IV cefazolin and adjuvant 2 g of intrawound vancomycin powder. Five patients in this group developed deep infections (3.8%). One hundred and thirty-four patients were treated with posterior instrumented thoracic or lumbosacral fusions using IV cefazolin and adjuvant 1 g of intrawound vancomycin powder. Of these, four patients developed deep infections (2.98%). One hundred and thirty-five patients in the control group were treated with posterior instrumented thoracic or lumbosacral using only IV cefazolin as prophylaxis. Of these, four patients developed deep infections (2.96%). Coagulase-negative staphylococcus was the most common isolated organism. There were no adverse clinical outcomes or wound complications due to local application of vancomycin powder. Conclusion: The preliminary result could not state the relation of intrawound vancomycin powder to the deep infection; further study with adequate sample size is required.
Precautions for using a filter protection device with a flow reversal method during carotid artery stenting: A case report on in-filter thrombus
Authors: Ohshima Tomotaka , Miyachi Shigeru , Matsuo Naoki , Kawaguchi Reo , Takayasu Masakazu
Published: May 2019

The combination of a flow reversal with two balloons and a filter protection device is one of the safest methods that can be used during carotid artery stenting (CAS). Although major adverse events did not occur under restrict protection, we experienced a case of in-filter thrombus during the procedure. A 68-year-old male presented with temporary right hemiparesis. The radiological examinations revealed 95% stenosis on the origin of the left internal carotid artery (ICA). The patient underwent left CAS of wherein a proximal common carotid artery balloon, an external carotid artery balloon, and a distal ICA filter, with continuous flow reversal to the femoral vein, were used. Although the reversal circulation was established, a massive newly developing thrombus was found in the proximal side of the filter. After an additional systemic heparinization, the thrombus disappeared. The procedure was performed without any complications. Physicians should be aware of the risk of developing intraprocedural thrombosis in a filter protection device. Because the filter protection device is designed for the antegrade flow, it may promote the development of thrombus against the retrograde flow. Thus, the filter protection device should be retrieved first under the flow reversal circumstance to avoid the distal migration of a clot around the filter device.
Unusual complication of paraplegia following intracranial aneurysm clipping in a patient with undiagnosed coarctation of aorta
Authors: Pasha Shaik , Ghanta Rajesh , Govind Biju
Published: May 2019

We report a case of subarachnoid hemorrhage in a 38-year-old male, diagnosed to have the right middle cerebral artery aneurysm on computed tomography (CT) cerebral angiogram. He was a known hypertensive for 17 years and was on irregular treatment. Craniotomy and clipping of the aneurysm were done. Postoperatively, the patient had high blood pressure of 200/120 mmHg. Treatment of hypertension in the postoperative period resulted in paraplegia. CT angiogram of aorta revealed coarctation-postductal type. He underwent balloon dilatation for the coarctation of aorta followed by coarctopalsty and stenting with the improvement in motor power in both lower limbs.
Interhemispheric approach to anterior communicating artery aneurysm: A case illustration
Authors: Senapati Satya , Rathore Lavlesh , Yamada Yasuhiro , Kato Yoko
Published: May 2019

There are two main types of approaches for anterior communicating artery (AcomA) aneurysms, namely pterional approach, and an interhemispheric (IH) approach. Pterional approach is the most common for anterior circulation aneurysms. However, this approach cannot be used without resection of gyrus rectus when aneurysm is located high within the IH fissure and directed posterosuperiorly, which is better handled with IH approach. In this article, we will describe the tricks of IH approach with a case illustration.
Giant spinal intradural metastatic adenocarcinoma of unknown primary: A rare case report
Authors: Meenakshisundaram Natarajan , Dhandapani Balasubramanian
Published: May 2019

Giant intradural metastases of nonneurogenic origin involving multiple segments represent an extremely rare manifestation of an unknown primary. The respective literature is very scarce. We present a 45-year-old female with complaints of low back pain for 4 years, involuntary urination for 2 years, and difficulty in using both lower limbs for 1 month. Examination revealed paraparesis with hypotonia. Imaging of lumbosacral spine revealed that expansile lytic destruction of vertebral bodies and posterior elements was noted from D8 to S2 vertebra and a large-sized patchy enhancing heterogeneous intradural extramedullary lesion was noted in D8–S2 level. Decompressive laminectomy from D11 to L4 vertebra and subtotal excision of the lesion were done. There was a marked improvement in the lower limb weakness and low back pain postoperatively. Histopathology revealed metastatic adenocarcinoma. Immunohistochemistry showed epithelial membrane antigen positivity. Accordingly, the aim of the surgery is strictly palliative. The majority of patients benefit with respect to neurological deficit/pain independent of the extent of resection. Thus, decompressive surgery is recommended to increase the quality of life. The occurrence of intradural spinal metastasis is rare. Only few cases of intra dural spinal metastasis involving multiple cord segments and osteolytic bony erosions have been documented. Hence this case is being presented here for its rarity and its uniqueness.
Fasteners - Part Standard - Cap Screws, Hex Bolts, and Hex Nuts (Metric)
Authors:   Ship Systems - Fasteners Committee
Published: May 2019

This SAE Part Standard covers selected metric screws, hex bolts, and nuts manufactured in accordance with American Society for Testing and Materials (ASTM) and SAE fastener standards. This document covers fastener materials often used in ship systems and equipment but its use may be applied wherever fasteners of the covered materials are used. This document permits the fasteners to be identified and ordered by a part or identifying number (PIN) as defined in this document.
Propriedades de painéis aglomerados produzidos com madeiras de Ligustrum lucidum e Pinus taeda
Authors: Sozim Pâmela Caroline Lau , Napoli Lygia Maria , Ferro Fabiane Salles , Mustefaga Erick Chagas , Hillig Éverton
Published: May 2019

Este trabalho teve por objetivo avaliar as propriedades físicas e mecânicas de painéis aglomerados produzidos com madeira de Ligustrum lucidum W.T. Aiton, pura ou com Pinus taeda, e comparar as propriedades desses painéis com os requisitos normativos e com os produzidos somente com Pinus taeda. Os painéis foram produzidos com adesivos uréia-formaldeído e tanino-formaldeído na proporção de 10% de massa de sólido sobre a massa seca de partículas. Para a confecção dos painéis, foi estabelecida massa específica nominal de 0,75 g cm-³, pressão específica de 3,92 MPa, temperatura de 160 °C e tempo de prensagem de 8 min para o adesivo uréia-formaldeído e 10 min para tanino-formaldeído. Após o período de climatização dos painéis, foram confeccionados os corpos de prova destinados aos ensaios físicos e mecânicos. Verificou-se que apenas madeira de Ligustrum lucidum com adesivo tanino-formaldeído, bem como a combinação de madeiras e adesivo uréia-formaldeído, proporcionou aos painéis melhores propriedades físicas e mecânicas. Esses tipos de painéis atenderam aos requisitos normativos de propriedades mecânicas e demonstraram que L. lucidum tem potencial para uso na produção de painéis aglomerados.
Interlanguage or Technology when Using English as Vehicular Language: what influences students productions online?
Authors: Torrado-Cespón Milagros
Published: May 2019

This article seeks to explore what influences the production of accurate online written texts in English by speakers of Spanish. In order to do so, the cases where the pronoun “I” is not capitalized have been examined in detail to determine whether we are facing an error due to a lack of proficiency or whether the use of ICT is to blame. After going through the cases of “i” and observing the other mistakes made in the texts where they appear, ICT together with lack of proofreading, and interlanguage seem to be the possible answers. Although we can establish the use of technology and, therefore, Computer-Mediated Communication (CMC) as the cause of most cases in analogy with what happens with native speakers, further investigation is needed and new research with similar control groups where explicit corrective feedback is given could give us more clues about the behaviour of the participants.
Analogias e metáforas no ensino de Física Moderna apresentadas nos livros didáticos aprovados pelo PNLD 2018
Authors: Kopp Felipe Augusto , Almeida Voltaire De
Published: May 2019

Este artigo investiga a presença de analogias e metáforas em capítulos de Física Moderna nos livros didáticos indicados pelo Guia de Livros Didáticos – PNLD 2018. Com base nos estudos linguísticos mais atuais, tenta-se estabelecer uma distinção conceitual entre essas duas figuras de linguagem para que elas possam ser melhor aproveitadas no ensino de Física. Para a coleta e registro dos dados, utiliza-se a análise de conteúdos proposta por Bardin (2002), enquanto que para a classificação das ocorrências é utilizada uma versão adaptada daquela proposta por Curtis e Reigeluth (1984). Os resultados obtidos, tanto numéricos quanto qualitativos, evidenciam as características opostas entre analogias e metáforas. Ambas aproximam informações familiares ou já conhecidas (veículo) de informações novas (alvo), mas a analogia faz isso aproximando coisas que pertencem a domínios com características comuns, enquanto a metáfora o faz aproximando coisas que pertencem a domínios muito distintos. Didaticamente, as analogias permitem fazer comparações por meio de semelhanças ou diferenças, o que é fundamental para a explicação de conceitos de Física Moderna. Já as metáforas podem ajudar a aproximar conceitos concretos de abstratos, mas isso é feito, em geral, de forma mais simples, o que requer um cuidado maior por parte dos autores de livros didáticos e dos professores que os utilizam.
O Ensino da Mecânica Quântica no nível médio por meio da abstração científica presente na interface Física-Literatura
Authors: Lima Luís Gomes de , Ricardo Elio Carlos
Published: May 2019

O presente artigo tem por objetivo investigar o ensino da Mecânica Quântica no Ensino Médio por meio da abstração científica criada na interface física e literatura e é fruto da pesquisa de dissertação presente em Lima (2014). A relação entre física e literatura é defendida com o propósito de ser utilizada como ferramenta ao ensino e aprendizagem da física, especialmente por propiciar o desenvolvimento da abstração científica. A formação de conceitos científicos e a importância da palavra são analisadas em Vygotsky, na formação dos pseudoconceitos e desenvolvimento da abstração, juntamente com o aporte das representações semióticas de Raymond Duval. O desenvolvimento dos conceitos sobre Mecânica Quântica ocorreu por meio de duas leituras. A primeira tratou do capítulo XVIII da Era dos Extremos de Hobsbawm, objetivando a inserção filosófica, histórica, política e social sobre o surgimento da Física Quântica. A segunda ocorreu por meio da leitura dos três capítulos iniciais de Alice no País do Quantum de Gilmore, visando os conceitos físicos de Mecânica Quântica. Os dados colhidos dos alunos após a leitura e a análise destes apontam a interface física-literatura como uma alternativa didática promissora para o ensino da Mecânica Quântica, em particular, e para o ensino da física, em geral.
Manifestaciones lingüísticas en personas mayores: el papel de la intervención logopédica en el envejecimiento sano y patológico
Authors: González Martín Enrique , Mendizábal de la Cruz Nieves , Jimeno Bulnes Natalia , Sánchez Gil Carolina
Published: May 2019

En los últimos años ha cobrado especial relevancia incrementar los conocimientos acerca de las capacidades lingüístico-comunicativas de la población con una edad superior a 65 años. Esto es debido a que España es uno de los países con mayor prevalencia de población envejecida.  Los cambios biológicos, psicológicos y sociales que se producen en este grupo de personas deben ser atendidos teniendo en cuenta la interacción entre los dominios cognitivos y lingüísticos. El objetivo de este trabajo es realizar una revisión bibliográfica de las manifestaciones lingüísticas en la tercera edad, tanto en el envejecimiento sano como patológico. Los resultados obtenidos indican que, en términos generales, los rasgos más sobresalientes se manifiestan principalmente en la dificultad de acceso a la etiqueta léxica de las palabras, el enlentecimiento del habla y la dificultad para mantener el tema del discurso. La labor de la intervención logopédica especializada es crucial como tratamiento eficaz en el control de estos síntomas lingüísticos. Se defiende la necesidad de realizar una intervención logopédica acorde a las características y necesidades de la población objeto de estudio tomando como referencia la función metalingüística del lenguaje.
Multidisciplinary approach in a case of hemifacial microsomia: Speech and language pathologist contributions.
Authors: Peris Hernandez Cristina , Rosell Clarí Vicent
Published: May 2019

This study shows the initial pathology, the evolution and the treatment of a clinical case of Hemifacial Microsomia from childhood to adolescence, placing special emphasis on the approach of the case from the point of view of Speech and language pathology. The objective of this research was to show the performances of the speech pathologist at the level of evaluation and rehabilitation of the functional alterations involved: respiration, chewing and speech. The methodology used was that of the case study, for which purpose it was decided to chronologically present the instruments and measures used, as well as the interventions carried out in three phases: from 0 to 4 years, from 5 to 11 and from 12 to 16 years. The results show the favorable evolution of the patient in the acquisition and mainte-nance of a pattern of nasal breathing, which includes the correct placement of the tongue at rest, the acquisition of a pattern of alternating bilateral chewing and a remarkable improvement in the quantity and quality of masticatory cycles, as well as the normalization of labial competence and the elimination of noises during swallowing. On the other hand, in the rehabilitative treatment performed after the arthroplasty, positive results were also recorded in the range of mandibular movement at the vertical and lateral levels, restoring retrusion. Therefore, we concluded that speech and language intervention was beneficial both in the rehabilitation of the functions and in the aesthetic changes at the level of the orofacial structure
Spanish academics and social networking sites: Use, non-use, and the perceived advantages and drawbacks of Facebook, Twitter, LinkedIn, ResearchGate, and Academia.edu
Authors: Segado-Boj Francisco , Díaz-Campo Jesús , Fernández-Gómez Erika , Chaparro-Domínguez María-Ángeles
Published: May 2019

This study examines Spanish academics’ motives for using social networking sites (SNS) and their perceptions regarding the limitations of and drawbacks to social media. We analyse 18 in-depth interviews conducted with Spanish university professors chosen according to their disciplines, academic ranks and level of use. Our findings confirm prior research based on the uses and gratifications theory. Thus, we conclude that SNS are used for managing content, identifying experts in a researcher’s field of knowledge. In addition, academics need to manage different personal identities in each SNS they use.
Tube therapy: Dealing with mental health problems in social video comment threads
Authors: Lindgren Simon , Lundström Ragnar
Published: May 2019

In this paper, we examine forms of communication and types of peer support that may arise in relation to mental health problems in peer-produced forums of social video comment threads. We focus specifically on how young fans of young YouTube celebrities (YouTubers) use this social media space to communicate with other YouTubers as well as with other fans about issues related to mental health. Through a semantic analysis, where topical themes in comment discussions are mapped, we address topics concerning mental health conditions in social video fandom discussions. At an overarching level, we are interested in how peer support is realized in the complex relationships between YouTubers and audience members, as well as among audience members. In our analysis, we focus on both the relationships between the individual and the collective, and between cooperation and competition in discussions. In concluding, we reflect upon what hindrances or possibilities for peer support exist in this relatively new and participatory social media setting.
COMPOSTAGEM DE RESÍDUOS DE CASCA DE OVO, ESTERCO BOVINO E LODO DE ESTAÇÃO DE TRATAMENTO DE EFLUENTE DE GRAXARIA: UMA ABORDAGEM EXPERIMENTAL EM PEQUENA ESCALA
Authors: Sotille Raquel , Marques Prietto Pedro Domingos , Colla Luciane Maria , Freitas Margarites Ana Cláudia
Published: May 2019

Neste trabalho avaliou-se o potencial de três resíduos agroindustriais (casca de ovo, esterco bovino e lodo de estação de tratamento de efluente de graxaria) pare serem tratados pelo processo de compostagem. Utilizaram-se quatorze reatores de dimensões reduzidas alimentados com 105 kg de misturas variáveis dos três resíduos sólidos, definidas através de um delineamento experimental do tipo simplex centróide. O processo foi monitorado através da medição periódica da temperatura, umidade, pH e relação C/N. A fase termofílica durou aproximadamente 35 dias. Após 32 dias, a massa em degradação atingiu a temperatura ambiente, sendo então, deixada para maturar por mais 35 dias. Os resultados mostraram que mesmo em pequena escala, foi possível compostar estes materiais e gerar um composto orgânico de qualidade para uso posterior na agricultura.
O ENSINO DE FÍSICA MODERNA E CONTEMPORÂNEA NA EDUCAÇÃO BÁSICA: CONTEÚDOS TRABALHADOS PELOS DOCENTES
Authors: Zolet Busatto Cassiano , Da Roza Silva Júpiter Cirilio , Pansera Junior Necleto , Samudio Pérez Carlos Ariel
Published: May 2019

A discussão sobre a introdução de Física Moderna e Contemporânea (FMC) na educação básica a cada dia se torna mais relevante, ideia esta reforçada pelos documentos legais e por pesquisadores da área de ensino de Física. À vista disso, o questionamento central de nossa pesquisa objetiva examinar quais os conteúdos que englobam à FMC estão sendo abordados pelos professores. Para responder tal pergunta, realizou-se uma pesquisa com docentes de escolas de ensino médio do norte do Rio Grande do Sul, próximas à Universidade de Passo Fundo. Utilizou-se como instrumento para a coleta de dados um questionário elaborado na plataforma Google Forms. Os resultados apontaram que grande parte dos professores teve a abordagem de tópicos de FMC em sua formação, e cerca da metade destes profissionais declararam que é um conteúdo de difícil compreensão. Ainda, observou-se uma disparidade entre área de conhecimento e de atuação, nos levando a propor uma reflexão quanto à formação de professores, a forma com que estes conteúdos são abordados nos cursos de licenciatura, os instrumentos didáticos-pedagógicos utilizados e a existência de materiais para subsídio, tanto de docentes (em qualquer nível), quanto de alunos de graduação. O trabalho permitiu evidenciar lacunas no ensino de FMC em vários aspectos, como na formação de professores, materiais didáticos, quantidade de períodos, dentre outros fatores.
UMA REVISÃO SOBRE A INFLUÊNCIA DOS PROCESSOS DE QUEIMA NA COMPOSIÇÃO DA CINZA DA CASCA DE ARROZ VISANDO PRODUÇÃO DE SÍLICA
Authors: Camargo Aline Frumi , Brandler Danieli , Modkovski Tatiani Andressa , Scapini Thamarys , Treichel Helen
Published: May 2019

Este trabalho buscou relatos recentes na literatura sobre a utilização da casca do arroz (CA) em processos de queima visando a produção de sílica. Em primeiro momento, avaliou-se a caracterização da casca de arroz para quantificações de seus componentes e a partir disso foi possível identificar elementos presentes na rede que compõe este resíduo, que são de extrema importância para escolha do processo de queima a ser adotado. Dois diferentes grupos de processos de combustão da CA foram analisados: queima controlada e não controlada. A utilização de um pré-tratamento precedente ao processo de queima também foi analisado objetivando a obtenção de cinzas com maior grau de pureza em relação ao percentual de sílica amorfa. A transformação das cinzas em energia e biomateriais que podem ser aplicados na construção civil, indústria de vidros, cerâmicas etc, reduzem os danos ambientais causados pela emissão de gases do efeito estufa, descarte em aterro sanitário ou despejo indevido no solo. A extração de subprodutos com valor agregado, é uma maneira de reduzir o consumo de matéria prima proveniente do meio ambiente colaborando para o desenvolvimento econômico sustentável.
ESTUDO DE PARÂMETROS GEOMÉTRICOS PARA ANÁLISE DE LAJES NERVURADAS ATRAVÉS DO MÉTODO DA ANALOGIA DE GRELHA
Authors: Zilio Afonso D. , Kuhn Alessandra , Bordignon Rodrigo , Di Domenico Luiza L.
Published: May 2019

Com o propósito de, simplificar a obtenção dos esforços internos e deformações em lajes nervuradas em concreto armado, um método utilizado é a analogia de grelha. Tal método caracteriza-se pela análise de elementos de barras com parâmetros de rigidezes equivalentes. Este estudo tem por objetivo propor parâmetros para ajuste do momento de inércia à torção equivalente, a fim de empregar a analogia de grelhas para análise estrutural de lajes nervuradas. Os parâmetros de ajuste foram definidos a partir da modelagem de lajes nervuradas pelo método dos elementos finitos (MEF) com relações entre lados (Lx/Ly) de 1, 1,5 e 2 e diferentes vínculos de apoio. Os dados de referência foram determinados a partir da modelagem numérica e comparados aos obtidos pelo método de analogia de grelha. A partir da análise e comparação entre os modelos, foram estabelecidos valores para os parâmetros de ajuste das propriedades geométricas. Propõe-se que o valor do momento de inércia à torção atribuído às barras da grelha, deva ser 16% do valor do momento de inércia à torção obtido a partir da seção transversal da nervura da laje. Alternativamente, o valor do momento de inércia à torção atribuído às barras da grelha, pode assumir o valor de 72% do momento de inércia a flexão da seção transversal da nervura. Estas proposições aplicam-se à todas configurações de lajes estudadas, contribuindo assim para a aplicabilidade do método de analogia de grelha na análise de lajes nervuradas.
TRATAMENTO POR RADIAÇÃO GAMA EM CRISTAIS DE AMETISTA DA REGIÃO DE PROGRESSO/RS
Authors: Tononi Larissa Lanes , Duarte Lauren Da Cunha , Juchem Pedro Luiz , De Menezes1 Mauricio Thadeu Fenilli , Schnellrath Jurgen
Published: May 2019

A ametista geralmente é tratada termicamente para obtenção da coloração amarelo-alaranjado a amarelo amarronzado, conhecida como citrino. Outra variedade que se pode obter com o tratamento térmico é a coloração verde, obtida em cristais de ametista da região de Montezuma (MG) e Nevada (Estados Unidos). Busca-se com este trabalho considerar outro tipo de tratamento da ametista através da exposição à radiação ionizante tomando por análise a espectroscopia na região infravermelha. As amostras de ametista foram divididas em lotes de ametista não irradiadas e irradiadas, que estas últimas foram submetidas à radiação gama com fonte de Co-60 estocado a seco e dose de 900 kGy. A irradiação modificou a cor dos cristais de ametista para violeta escuro a preto. Em algumas amostras irradiadas, a cor violeta da parte apical apresentou uma saturação mais intensa em relação à parte inferior, indicando zonação química. Em análise na região infravermelha, nas amostras irradiadas houve aumento de intensidade de absorção das bandas em 3300, 3200, 2676 e 2597 cm-1. Além disso, houve o aparecimento da banda em 2509 cm-1, não visível nas amostras de ametista natural. As bandas em 3463 cm-1 e 3459 cm-1, que aparecem nas amostras de ametista não irradiada e irradiada, respectivamente, podem estar relacionadas ao Al-OH/Na+ ou ao Al-OH/Li+. O escurecimento das amostras após a irradiação pode estar relacionada à presença de alumínio. Com o resultado, o tratamento por radiação gama em ametista pode modificar para melhor a classificação por intensidade de cor utilizada para o comércio desta gema.
PADRONIZAÇÃO E OTIMIZAÇÃO DE TRATAMENTO TERMOQUÍMICO A PARTIR DE RODAMINA-B PARA ÁGATAS DO RIO GRANDE DO SUL
Authors: Ericksson Cristiane , De Brum Irineu Antonio Schadach
Published: May 2019

A ágata do sul do Brasil, apresenta colorações pouco interessantes ou salientes, sendo predominante os tons acinzentados. Tais qualidades, foram fatores determinantes para o início do processo de tingimento de ágata do Rio Grande do Sul, no século XVIII. Atualmente, o segmento mineral, apresenta carências relacionadas a tecnologias e processos de produção, além de infraestruturas inadequadas, resultando em prejuízo para as comunidades produtoras. Nesse cenário, a pesquisa se estrutura para avaliar técnicas operacionais viáveis para o setor, objetivando a melhoria do valor agregado às gemas beneficiadas e qualidade da cor.  Para o desenvolvimento do tratamento de ágatas, o sistema foi replicado, padronizado e otimizado no Laboratório LAPROM da UFGRS e Centro Tecnológico de Pedras, Gemas e Joias do Rio Grande do Sul. A amostragem foi classificada em quatro padrões de deposição e analisada em espectrofotômetro em três etapas distintas. Ao término, se tem a comparação dos resultados do tingimento otimizado e o industrial, com as curvas de distribuição espectral medidas antes e após o tratamento termoquímico da ágata. Com o sistema otimizado, foi possível reduzir custos operacionais, tempo de energia envolvida no sistema, além de manter e elevar a qualidade da cor, sendo possível estabelecer relação com aspectos quanti e qualitativos dos reagentes utilizados.