bluuebunny/crossref_metadata_2025 huggingface dataset:
Geology, Mineral Chemistry, and Structure of the Kimberlites at Diavik Diamond Mine: Indicators of Cluster-Scale Cross-Fertilization, Mantle Provenance, and Pipe Morphology
Authors: Moss S. , Porritt L. , Pollock K. , Fomradas G. , Stubley M. , Eichenberg D. , Cutts J.
Published: February 2020

The Diavik diamond mine includes four diamondiferous kimberlite pipes (A154N, A154S, A418, and A21) and minor kimberlite dikes that are mined by Rio Tinto and Dominion Diamond Corporation. Pipe morphologies from A154S, A154N, and A418 show similar circular near-surface expressions, with expansion of cross-sectional area and elongation at depths below 100 m above sea level, consistent with the dominantly steeply dipping to nearly vertical structures in the area (~050°). The internal geology of the pipes is highly variable; twenty-nine distinct domains form the basis for three-dimensional geologic models. The kimberlite deposits at Diavik are highly variable and suggest that emplacement into similarly shaped pipes within a single cluster can vary significantly, resulting from a single infilling sequence (e.g., A154S), multiple events separated by periods of relative volcanic quiescence (e.g., A154N), or changes in magma flux or hydrologic conditions (e.g., A418). Diavik pipe emplacements likely result from a shared five-stage emplacement continuum involving (1) exploitation of existing structures by early kimberlite magma intrusion, (2) initial pipe excavation, (3) pipe infilling, (4) sedimentation into craters, and (5) late magmatic intrusion.

Indicator minerals from each kimberlite pipe contain varying proportions of the same mantle source. Differences in the relative abundances of mantle minerals are shown among different pyroclastic domains in a single pipe, suggesting emplacement via multiple magma pulses containing unique mantle populations, while units from different pipes are, in some cases, more similar and reflect cross-fertilization among adjacent pipes. Clinopyroxene thermobarometry indicates that the Diavik garnet lherzolite xenoliths were sampled from 100- to 200-km depths and suggests that magmas emplaced at A154N successively sampled deeper mantle through time. Structural analysis indicates that faulting occurred prior to kimberlite emplacement in varying stress regimes. Faults were subsequently reactivated or exploited by early-stage ascending kimberlite magmas, impacting both pipe elongation directions and excavation depths during emplacement. Exploration assessments on the basis of shallow (<150 m) drilling alone may underestimate the volume and/or diamond potential, particularly for isolated (i.e., unclustered) bodies.
Whatever Your Preference Is for the Treatment of the Proximal Humeral Fracture
Authors: Cho Nam Su
Published: February 2020

No abstract available.
Comparison of Two Arthroscopic Coracoplasty Approaches in Subscapularis Tears
Authors: Song Han Eui , Jang Suk Hwan , Kim Jung Gon
Published: February 2020

BACKGROUND: Few studies have reported the results of arthroscopic coracoplasty concomitantly conducted with subscapularis tear. Therefore, this study was conducted to examine and compare the outcomes of arthroscopic subscapularis repair after arthroscopic coracoplasty using either the subacromial approach or rotator interval approach.METHODS: We retrospectively reviewed 51 patients who underwent coracoplasty with subscapularis repair. The patients were grouped according to whether the subacromial approach group (24 patients) or rotator interval approach group (27 patients) was used during coracoplasty. Preoperative and postoperative visual analogue scale scores, American shoulder and elbow surgeons scores, Korean shoulder scores, and range of motion (ROM) were assessed. Assessment of repaired rotator cuff tendon integrity was performed at 1 year after surgery using either magnetic resonance imaging or ultrasonography.RESULTS: At final follow-up, overall functional scores and ROM improved significantly in both groups when compared with preoperative values (p>0.05). The re-tear rates were not significantly different between groups; however, the rotator interval approach group showed a significant increase in ROM compared with that in the subacromial approach group (p<0.05).CONCLUSIONS: Arthroscopic coracoplasty conducted concomitantly with subscapularis repair can provide a satisfactory outcome. There were no significant differences between the two approach groups regarding final functional scores and re-tear rates. However, the rotator interval approach group showed a greater increase in ROM at final follow-up, especially in external rotation.
Radiologic Comparison of Humeral Position according to the Implant Designs Following Reverse Shoulder Arthroplasty: Analysis between Medial Glenoid/Medial Humerus, Lateral Glenoid/Medial Humerus, and Medial Glenoid/Lateral Humerus Designs
Authors: Cho Nam Su , Nam Ju Hyun , Hong Se Jung , Kim Tae Wook , Lee Myeong Gu , Ahn Jung Tae , Rhee Yong Girl
Published: February 2020

BACKGROUND: The currently available reverse shoulder arthroplasty (RSA) designs can be classified into medial glenoid/medial humerus (MGMH), lateral glenoid/medial humerus (LGMH), and medial glenoid/lateral humerus (MGLH) prosthesis designs. The purpose of this study was to radiologically analyze the effect of different RSA designs on humeral position following RSA.METHODS: A total of 50 patients who underwent primary RSA were retrospectively analyzed. Among 50 patients, 33 patients (group A: MGMH) underwent RSA with Aequalis system (Wright, Inc, Bloomington, MN, USA), 6 (group B: LGMH) with Aequalis system using bony increased offset, and 11 (group C: MGLH) with Aequalis Ascend Flex system. The acromiohumeral distance, acromioepiphyseal distance (AED), lateral humeral offset (LHO), LHO from the center of rotation (LHO(COR)), and deltoid length were radiologically measured to quantify the distalization and lateralization of the humerus.RESULTS: The increment in postoperative AED was 19.92 ± 3.93 mm in group A, 24.52 ± 5.25 mm in group B, and 25.97 ± 5.29 mm in group C, respectively (p=0.001). The increment in postoperative LHO was 0.13 ± 6.30 mm, 8.00 ± 12.14 mm, and 7.42 ± 6.88 mm, respectively (p=0.005). The increment in postoperative LHOCOR was 20.76 ± 6.06 mm, 22.04 ± 5.15 mm, and 28.11 ± 4.14 mm, respectively (p=0.002).CONCLUSIONS: The radiologic analysis of the effect of different RSA designs on humeral position following RSA showed significant differences in the increment in postoperative AED, LHO, and LHO(COR) between the 3 groups. Therefore, MGLH design seems to be more effective for humeral distalization and lateralization compared to original Grammont design.
Minimally Invasive Percutaneous Plate Osteosynthesis via a Deltoidsplitting Approach with Strut Allograft for the Treatment of Displaced 3- or 4-part Proximal Humeral Fractures
Authors: Noh Young Min , Kim Dong Ryul , Kim Chul Hong , Lee Seung Yup
Published: February 2020

BACKGROUND: This study introduces a surgical technique with good clinical outcome useful in the treatment of osteoporotic displaced 3- or 4-part proximal humeral fractures.METHODS: From May 2014 to February 2016, 16 patients with displaced 3- or 4-part proximal humeral fractures were treated by application of a locking plate with an endosteal strut allograft via a deltoid splitting approach with a minimum follow-up of 12 months. The allograft was inserted through a fractured gap of the greater tuberosity to support the humeral head and then fixed by a locking plate with meticulous soft tissue dissection to protect the axillary nerve. Surgical outcomes were evaluated by the American Shoulder and Elbow Surgeons (ASES) and visual analogue scale (VAS) scores, radiological imaging, and clinical examination. Fixation failure on radiographs was defined as a >5° loss of neck shaft angle (NSA) compared to that on an immediate postoperative radiograph. Avascular necrosis (AVN) of the humeral head was also evaluated.RESULTS: In all cases, complete union was achieved. The ASES and VAS scores were improved to 85.4 ± 2.1 and 3.2 ± 1.3, respectively. Twelve patients (75.0%) had greater than a 5° change in NSA; the average NSA change was 3.8°. Five patients (31.3%) had unsatisfactory ranges of motion exhibiting a < 100° active forward flexion. No axillary nerve injuries or AVN were observed at the last follow-up. One patient was converted to reverse total arthroplasty due to severe pain and functional deficit.CONCLUSIONS: Minimally invasive fixation via a locking compression plate and an endosteal fibula strut allograft in Neer classification 3-or 4-part fractures with severe osteoporosis in elderly patients can achieve good clinical results.
Surgical Treatment Strategy for Distal Humerus Intra-articular Fractures
Authors: Lee Hyo-Jin
Published: February 2020

Treating distal humerus fractures, especially those involving intra-articular lesions, is complex and often technically demanding. Although there still exist many controversial issues, the goal of treatment is to establish anatomical stable fixation by restoring the two columns and the articular surface. Universally, a posterior midline incision is applied, and the approach varies according to the further management of the triceps or olecranon. Evidence supports dual plate fixation as the optimal fixation method, and debates regarding appropriate plating configuration are still ongoing. As multiple clinical studies comparing results of parallel and perpendicular plate fixation have shown no actual difference, it is important to place the plates according to the fracture configuration.
The Evaluation of Exogenous Melatonin Administration in Supraspinatus Overuse Tendinopathy in an Experimental Rat Model
Authors: Kocadal Onur , Pepe Murad , Akyurek Nalan , Gunes Zafer , Surer Hatice , Aksahin Ertugrul , Ogut Betul , Aktekin Cem Nuri
Published: February 2020

Background: Increased oxidative stress and inflammation play a critical role in the etiopathogenesis of chronic tendinopathy. Melatonin is an endogenous molecule that exhibits antioxidant and anti-inflammatory activity. The aim of this study was to evaluate the biochemical and histopathological effects of exogenous melatonin administrations in supraspinatus overuse tendinopathy.Methods: Fifty rats were divided into the following four groups: cage activity, melatonin treatment, corticosteriod therapy, and control. Melatonin (10 mg/kg, intraperitoneal; twice a day) and triamcinolone (0.3 mg/kg, subacromial; weekly) were administered to the treatment groups after the overuse period. Biochemical and histopathological evaluations were performed on serum samples and biopsies obtained from rats. Plasma inducible nitric oxide synthase (iNOS), vascular endothelial growth factor (VEGF), total antioxidant status (TAS), total oxidant status (TOS), and oxidative stress index (OSI) levels were evaluated biochemically.Results: The TAS, TOS, OSI, iNOS, and VEGF values were significantly lower than the pre-treatment levels in rats receiving exogenous melatonin treatment (3 or 6 weeks) (p<0.05). TOS, iNOS, VEGF, and OSI values after 3 weeks of triamcinolone administration, and TOS, VEGF, and OSI levels after 6 weeks of triamcinolone application, were significantly lower than the pre-treatment levels (p<0.05).Conclusions: Exogenous melatonin application in overuse tendinopathy reduces oxidative stress and inflammation. Melatonin might be an alternative potential molecule to corticosteroids in the treatment of chronic tendinopathy.
Crossbar Technique for the Failed Clavicular Hook Plate Fixation in an Acute Acromioclavicular Joint Dislocation: Salvage for Acromial Fracture after Clavicular Hook Plate
Authors: Koh Kyoung Hwan , Shin Dong Ju , Hwang Seong Mun
Published: February 2020

We experienced acromial erosion and subsequent fracture after the treatment of Rockwood type V acromioclavicular dislocation with hook plate and coracoclavicular ligament augmentation. It was treated by using a surgical technique to address an acromial fracture and subsequent losses of reduction in acromioclavicular joint with two trans-acromial cortical screws (crossbar technique). The reduction state of acromioclavicular joint could be maintained by these two screws. Our crossbar technique could be considered as a good salvage procedure for the reduction loss caused by cutout or significant erosion of acromion after insertion of clavicular hook plate.
Does the Use of Injectable Atelocollagen during Arthroscopic Rotator Cuff Repair Improve Clinical and Structural Outcomes?
Authors: Kim In Bo , Kim Eun Yeol , Lim Kuk Pil , Heo Ki Seong
Published: February 2020

Background: Since the establishment of biological augmentation to improve the treatment of rotator cuff tears, it is imperative to explore newer techniques to reduce the retear rate and improve long-term shoulder function after rotator cuff repair. This study was undertaken to determine the consequences of a gel-type atelocollagen injection during arthroscopic rotator cuff repair on clinical outcomes, and evaluate its effect on structural integrity.Methods: Between January 2014 and June 2015, 121 patients with full thickness rotator cuff tears underwent arthroscopic rotator cuff repair. Of these, 61 patients were subjected to arthroscopic rotator cuff repair in combination with an atelocollagen injection (group I), and 60 patients underwent arthroscopic rotator cuff repair alone (group II). The visual analogue scale (VAS) for pain and the Korean Shoulder Society (KSS) scores were evaluated preoperatively and postoperatively. Magnetic resonance imaging (MRI) was performed at 6 months postoperatively, to assess the integrity of the repair.Results: VAS scores were significantly lower in group I than in group II at 3, 7, and 14 days after surgery. KSS scores showed no significant difference between groups in the 24 months period of follow-up. No significant difference was obtained in the healing rate of the rotator cuff tear at 6 months postoperatively (p=0.529).Conclusions: Although a gel-type atelocollagen injection results in reduced pain in patients at 2 weeks after surgery, our study does not substantiate the administration of atelocollagen during rotator cuff repair to improve the clinical outcomes and healing of the rotator cuff.
Early and Delayed Postoperative Rehabilitation after Arthroscopic Rotator Cuff Repair: A Comparative Study of Clinical Outcomes
Authors: Choi Sungwook , Seo Kyu Bum , Shim Seungjae , Shin Ju Yeon , Kang Hyunseong
Published: February 2020

Background: The duration of immobilization after arthroscopic rotator cuff repair and the optimal time to commence rehabilitation are still the subject of ongoing debates. This study was undertaken to evaluate the functional outcome and rotator cuff healing status after arthroscopic rotator cuff repair by comparing early and delayed rehabilitation.Methods: Totally, 76 patients with small, medium, and large sized rotator cuff tears underwent arthroscopic repair using the suture-bridge technique. In early rehabilitation group, 38 patients commenced passive range of motion at postoperative day 2 whereas 38 patients assigned to the delayed rehabilitation group commenced passive range of motion at postoperative week 3. At the end of the study period, clinical and functional evaluations (Constant score, the University of California, Los Angeles [UCLA] shoulder score) were carried out, subsequent to measuring the range of motion, visual analogue scale for pain, and isokinetic dynamometer test. Rotator cuff healing was confirmed by magnetic resonance imaging at least 6 months after surgery.Results: No significant difference was obtained in range of motion and visual analogue scale between both groups. Functional outcomes showed similar improvements in the Constant score (early: 67.0?88.0; delayed: 66.9?91.0; p<0.001) and the UCLA shoulder score (early: 20.3?32.3; delayed: 20.4?32.4; p<0.001). Furthermore, rotator cuff healing showed no significant differences between the groups (range, 6?15 months; average, 10.4 months).Conclusions: Delayed passive rehabilitation does not bring about superior outcomes. Therefore, early rehabilitation would be useful to help patients resume their daily lives.
Management of Ulnar Collateral Ligament Injuries in Overhead Athletes
Authors: Jang Suk-Hwan
Published: February 2020

Ulnar collateral ligament injuries of the elbow are frequent among overhead athletes. The incidence of ulnar collateral ligament reconstructions (UCLRs) in high-level players has increased dramatically over the past decade, but the optimal technique of UCLR is controversial. Surgeons need to manage the patients’ expectations appropriately when considering the mode of treatment. This article reviews current studies on the management of ulnar collateral ligament injuries, particularly in overhead athletes.
Sob o falso prestígio do maravilhoso: o ensino de história nos pareceres da Instrução Pública de 1883
Authors: Mecenas Santos Ane Luise Silva , Ferronato Cristiano
Published: February 2020

O escopo deste artigo é a análise da proposta de história ensinada a partir do parecer do projeto da reforma da instrução pública primária de 1882. O documento é um importante testemunho acerca dos embates sobre a renovação da instrução pública brasileira no último decênio do Império do Brasil, bem como de uma cultura política educacional de perspectiva liberal. Pautado no referido documento, ambiciona-se problematizar a concepção de história defendida pelos intelectuais que elaboraram o documento e o entendimento atinente ao lugar da disciplina história no âmbito da formação do cidadão brasileiro.
Modos de aprender a ensinar sobre Gênero nas aulas de História. Apontamentos sobre os relatos de experiências do PIBID/UNIFAL (2015-2016).
Authors: Delfino Leonara Lacerda
Published: February 2020

O objetivo deste artigo é problematizar as possibilidades e dificuldades de aprender a ensinar sobre a temática de gênero nas aulas de história, através dos projetos de intervenção ministrados por bolsistas do PIBID nas escolas conveniadas à Universidade Federal de Alfenas (UNIFAL), entre 2015 a 2016. A partir dos relatos produzidos pelos (as) bolsistas, refletimos sobre os resultados e desafios encontrados para o desenvolvimento de uma das frentes da consciência histórica, engendrada através do aprendizado proposto pelos pibidianos nas escolas públicas de Educação Básica da cidade de Alfenas (MG). Para tanto, utilizamos como fontes de análise os relatórios de diagnósticos, os projetos de intervenção e os relatos de experiências dos professores em formação envolvidos na efetivação das sequências didáticas na construção dos saberes ensinados e aprendidos nas aulas de história. Nesta proposta, tratamos sobre as formas de tratamento dadas pelos (as) alunos (as) escolares, os embates externos à abordagem do tema, a construção dos corpos disciplinados dentro e fora da cultura escolar e as percepções e significados atribuídos pelos (as) próprios (as) pibidianos (as) às questões de gênero em suas trajetórias como professores em formação. Por seu turno, nos apoiamos na discussão epistemológica de gênero conjugada às noções de cultura escolar, enquanto espaço de normatização dos corpos, além da noção de diversidade dos saberes docentes e de produção de poderes disciplinares na construção identitária dos sujeitos escolares.
História: demandas e desafios do tempo presente - Produção Acadêmica, Ensino de História e Formação Docente
Authors: Vieira Karla Andrezza
Published: February 2020

Resenha do livro supracitado. Trata-se de um esforço coletivo de pesquisadores associados a diferentes instituições que lidam com o ensino de História e que estão dispostos a refletir sobre a importância da disciplina diante das reformas educacionais. Foco do texto: Produção acadêmica e seus diálogos com a Educação Básica.
Evaluating Growth and Yield Parameters of Five Quinoa (Chenopodium quinoa W.) Genotypes Under Different Salt Stress Conditions
Authors: Qureshi Asad Sarwar , Daba Ashenafi Worku
Published: February 2020

Soil salinization is a global problem which restricts the choice of crop for cultivation. Management and reclamation of salinity using costly techniques may not be affordable by subsistence farmers. Therefore, it is important to look for new alternate crops like “quinoa” which are more salt-tolerant. As crops vary in their tolerance to salinity, they need to be evaluated for different salinity conditions. This study was conducted to evaluate five quinoa (Chenopodium quinoa W.) genotypes (ICBA-Q1, ICBA-Q2), ICBA-Q3, ICBA-Q4 and ICBA-Q5) for salinity tolerance under four artificially induced salinity (5, 10, 15, 20 dS m-1) levels. The pot trials were conducted in a greenhouse, using 6 kg of Fluvisol soil in each pot. For comparison, trials were also conducted under field conditions. The parameters studied were rate of seed germination, plant height, fresh and dry biomass, chlorophyll content and grain yield. As expected, salinity had generally an inhibitory effect on all parameters. Out of the five quinoa varieties (ICBA-Q1 to ICBA-Q5), ICBA-Q3 and ICBA-Q4 proved to be more salt-tolerant. Therefore these two genotypes are recommended to farmers for large-scale adaptation.
Potential of Predator Podisus nigrispinus Dallas (Hemiptera: Pentatomidae) in the Control of Helicoverpa armigera Hübner (Lepidoptera: Noctuidae)
Authors: Simonato Juliana , Oliveira Harley N. de , Grigolli José F. J. , Grigolli Mirian M. Kubota , Silva Ivana F. da
Published: February 2020

Managing Helicoverpa armigera is still a major challenge for Brazilian farmers, due to limited information available about chemicals and biological control of this pest in Brazil. This study focused on evaluating the biological aspects of Podisus nigrispinus fed with H. armigera, under laboratory conditions, as well as verifying the capacity of the P. nigrispinus in preying on caterpillars of H. armigera in the field, in soybean crops. The experiments were conducted in laboratory under controlled temperature conditions of 25±2 ºC, relative humidity (RH) 60±10% and 14-hour photophase, as well as in the field, at the experimental station of Fundação MS in Maracaju, MS. In the laboratory, second instar nymphs of P. nigrispinus were placed in plastic jars and fed with H. armigera larvae or Tenebrio molitor larvae throughout the nymphal phase. When they reach adulthood, 15 couples were formed, remaining with the same prey of the previous phase. For the field trial, soybean plants were caged, and inside these cages were released eight quarter-instar H. armigera caterpillars. Subsequently, in each cage were released an adult female or a fifth instar nymph, and after 24 hours, the number of prey caterpillars were assessed. Predator nymphal duration was shorter in treatment with H. armigera than with T. molitor. Nymphal viability was similar between treatments. Adult females and males fed with H. armigera presented greater body mass than those fed with T. molitor. The number of postures per female and the number of eggs per female were similar between treatments. The incubation period of eggs was longer for treatment with H. armigera, differing statistically from treatment with T. molitor. Eggs from treatment with H. armigera showed similar viability to treatment with T. molitor, not differing statistically. Females and males under treatment with H. armigera showed longer longevity compared to treatment with T. molitor. Adult females preyed on average 2.26 caterpillars within 24 hours and fifth instar nymphs preyed on 1.73 caterpillars/day. P. nigrispinus showed better development when fed with H. armigera, demonstrating that it can be used as an alternative host for breeding this predator. The predator showed satisfactory performance for predation rate/day. Release of fifth instar nymphs and adult females of P. nigrispinus may reduce the pest population in relation to the absence of the predator under field conditions, an important alternative to be used in H. armigera integrated management programs.
Biochar Yield From Shell of Brazil Nut Fruit and Its Effects on Soil Acidity and Phosphorus Availability in Central Amazonian Yellow Oxisol
Authors: Oliveira D. M. , Falcão N. P. S. , Damaceno J. B. D. , Guerrini I. A.
Published: February 2020

Phosphorus is one of the most limiting elements in the amazon soil, requiring low cost alternatives that increase the agronomic efficiency of phosphate fertilizers for satisfactory crop production and biochar has been used as an option for increase soil fertility. The objective of this work was to evaluate the yield and properties of the biochar produced from the shell of Brazil nut fruit at 500 oC, as well as its behavior in the acidity and phosphorus availability from mineral source in Yellow Oxisol. The experimental design was completely randomized in a factorial arrangement (5 × 5) with five doses of biochar (0, 20, 40, 60 and 80 t ha-1) and five doses of P2O5 (0, 100, 200, 300 and 400 kg ha-1) in 20 kg pots. The trial was carried out at 365 days and the yield and properties of the produced biochar were evaluated, as well as the determination of acidity and total and available phosphorus. The biochar produced from feedstock was considered satisfactory, with 59%, which is a good alternative for producers. Aluminum contents were reduced confirming the potential of biochar as a corrective for acidity. Additionally, the amount of total and available phosphorus increased with increasing biochar doses. Thus, not only the feedstock but also the pyrolysis temperature showed hight potencial to improve the amount of phosphorus in the soil and decrease the soil acidity.
Effect of Agricultural Credit Access on Rice Productivity: Evidence from the Irrigated Area of Anambe Basin, Senegal
Authors: Diallo Mouhamadou Foula , Zhou Jiajun , Elham Hamidullah , Zhou De
Published: February 2020

Rice is an important staple food in many developing countries, especially in Senegal. However, rice production in Senegal only meet 20% of the domestic demand largely due to the poor performance of rice farmers and low productivity. Access to agricultural credit has strong impacts on the technical efficiency of farmers and would promote inputs and new technology adoption. But that is not clear enough in previous studies. This study investigates the impact of agricultural credit access on rice productivity and technical efficiency with 260 random sampled rice farmers from Anambe basin in Senegal. The Stochastic Frontier Analysis (SFA) was adopted to estimate the technical efficiency. The results indicate that the inputs of rice production, including labor, pesticide, herbicides and fertilizer, have significant impacts on rice productivity. Furthermore, the results present that the average efficiency is of 0.813 and the inefficiency estimation model reveals that the influences of agricultural credit access, gender, education, ethnicity, use of improved seed and land tenure system on technical inefficiency of rice production are significant. Particularly, for the access to agricultural credit, rice farmers without agricultural credit would get 3.8% higher production inefficiency. The farmers with access to credit yield 37.32% higher rice production than their counterparts. Therefore, our study provides strong empirical evidence to promote agricultural credit in rice production.
Quantification of Bioactive Molecules, Minerals and Bromatological Analysis in Carao (Cassia grandis)
Authors: Fuentes Jhunior Abrahan Marcía , Fernández Ismael Montero , Fernández Héctor Zumbado , Sánchez Jesús Lozano , Alemán Ricardo Santos , Navarro-Alarcon Miguel , Borrás-Linares Isabel , Maldonado Selvin Antonio Saravia
Published: February 2020

Medicinal plants have various beneficial conditions for humanity, one of them is its medicinal contribution due to the presence of phytochemicals and antioxidants, characterized by these bioactive compounds as the main source of nutraceuticals. The fruit of Cassia grandis, traditionally known as carao, is a plant that is attributed antimicrobial and medicinal properties. The objective of this work was to determine the bromatological, mineralogical composition and bioactive molecules of carao in the department of Choluteca (Honduras). Total phenolic compounds determined by the Folin-Ciocateau method resulted in higher concentrations in the seeds 11.1±0.3 mg EAG 100 g-1. The antioxidant activity was also found to be higher in carao seeds, with concentrations of 7.31±0.11 μg g-1 of DPPH and total carotenoids showed higher concentration in the pulp with a concentration of 4.12±0.11 μg mL-1. Among the macro minerals, high concentrations of magnesium and calcium stand out in the seed with a concentration of 18.27±0.14 mg 100 g-1 and 7.31±0.23 mg 100 g-1 respectively. Among the microminerals, iron stands out in higher concentrations than in the rest of the microminerals being higher in the shell with concentrations of 1.71±0.23 mg 100 g-1 followed by manganese in concentrations of 0.51±0.12 mg 100 g-1.
Readiness Factors and Consumer Acceptance of Technology in Mobile Telephony
Authors: Cunha Lucilla Andrade Sousa , Silva Jussara Goulart da , Prado Rejane Alexandrina Domingues Pereira do , Silva Marli Auxiliadora da
Published: February 2020

This study aims at analyzing the variables of use and contact of users regarding to products and services of mobile phone technology. Technological innovation stands in the enterprise, enabling growth and creation of new products and services. In the theoretical framework, we used the technology readiness model, from users beliefs and feelings represented by four dimensions: optimism, innovativeness, discomfort and insecurity. It also highlights the technology acceptance model and presents two important constructs as perceived usefulness and ease of use. In short, the factors that support the technology readiness model could be preceding the technology acceptance model. To conduct this study, a field survey of students at the Federal University of Uberlândia / Campus FACIP was carried out. Results indicate optimism as the main factor to accept new mobile technology, due to the fact that the mobile devices provide benefits to people's lives and prompt them a positive attitude toward mobile technology. The perception of the user to purchase a mobile device is directly related to its usefulness and ease of handling of the technology.
Women Entrepreneurship and Innovations in India: An Exploratory Study
Authors: Bulsara Hemantkumar P. , Chandwani Jyoti , Gandhi Shailesh
Published: February 2020

Increased female entrepreneurial activity heralds a progress for women’s rights and optimization of their economic and social living index. Women entrepreneurship is synonymous with women empowerment. Parallel to the male counterparts, female entrepreneurs are catalytic in job creation, innovation and more than tangible contribution to the GNP of the country. An economy thrives when women get a level playing field as men. Innovation works as a catalyst or an instrument for Entrepreneurship. Indian Women, despite all the social hurdles stand tall from the rest of the crowd and are applauded for their achievements in their respective field. The transformation of social fabric of the Indian society, in terms of increased educational status of women and varied aspirations for better living, necessitated a change in the life style of Indian women. This paper endeavors to explore studies related to Women Entrepreneurship and Innovation in India. Few examples from Gujarat, India have been taken to understand the study in a better way. Keywords: Women Entrepreneurship; Innovation; Entrepreneurship; India; Economy; Gujarat.
Social Entrepreneurship in India: An Exploratory Study
Authors: Bulsara Hemantkumar P. , Gandhi Shailesh , Chandwani Jyoti
Published: February 2020

Social Entrepreneurship is an all-encompassing nomenclature, used for depicting the process of, bringing about social change on a major and impactful scale compared to a traditional Non-Governmental Organization (NGO).  It is an increasingly important concept in the study of voluntary, non-profit and not-for -profit organizations. Earlier, organizations addressing key social issues were assumed to be idealistic, philanthropic with entrepreneurial skills. Social Entrepreneurship in India is emerging primarily because the government is very keen on its promotion, not necessarily by funding it or by advising on it but by enabling it. The Corporate Social Responsibility (CSR) of the private sector with clearly earmarked funds and full-fledged action teams have played an important role in sprucing up the image of Social Entrepreneurship. The focus of the paper is to study the growing trends of Social Entrepreneurship in India and the new initiatives taken by various Social Entrepreneurs. It also gives a brief idea of different Theories of Social Entrepreneurship. Efforts are made to provide information and an exploratory study, related to the support activities of Social Entrepreneurship and Social Entrepreneurial ventures in India. This may be beneficial in future empirical studies of the subject. Keywords: Entrepreneurship, Social Entrepreneurship, Social Entrepreneur, NGO, Corporate Social Responsibility, India.
Diffusion and adoption of technology amongst engineering and business management students
Authors: Gabriel Marcelo Luiz Dias Da Silva , Silva Dirceu Da
Published: February 2020

This study aimed to identify profiles of technology adoption amongst engineering and business management students based on Rogers' theory of diffusion of innovations and on Hirschman's studies of innovativeness, novelty seeking, creativity behavior and role accumulation. A systematic literature review was performed and an item pool was generated to measure the constructs found on theory. The questionnaire was presented to an experts' panel for content validity and to a sample of subjects in the population for semantic validity. The final research instrument was then submitted to 390 students from private and public universities in Brazil. Mean age of sample was 22.5 years (SD = 4.9) and was well distributed between males (50.6%) and females (49.4%). Data was analyzed using SPSS 22.0 and SmartPLS 2.0. A hypothetical model was specified and alternative models as well. Univariate and multivariate normality was tested and PLS-SEM was chosen due to the non-parametric nature of collected data. Final results proved that Roger's theoretical profiles (e.g.: innovator, early adopter, etc) are predictors of Hirschman's adoption typology and these findings are useful to understand the generational patterns of technology diffusion and adoption and to support corporate initiatives on technology deployment amongst employees
Learning achievement and knowledge transfer: the impact factor of e-learning system at Bach Khoa University, Vietnam
Authors: Pham Quoc Trung , Huynh Minh Chau
Published: February 2020

E-learning is the application of innovative ICT platforms and Internet in education to make it easier, spacious, and more efficient. Advantages of e-learning are recognized, but its impact on learning achievement and knowledge transferring are not confirmed clearly. Learning is considered the skills of students and knowledge gained through experience in the training process. Learning achievement has been defined as students' knowledge, skills and study habits in a training course and effectiveness of their application to their work. Based on previous research, this study suggested that learning achievement as a dependent variable affected by the capacity factors, such as: computer self efficacy, ease of use, perceived usefulness, face to face interaction, e-mail interaction, and social presence. Besides, knowledge transfer is also affected by learning achievement. The study result showed that 3 factors: easiness usefulness, e-mail interaction, and social presence have positive impacts on learning transferring knowledge through the e-learning system of Bach Khoa University (BKU). Based on analysis results, some managerial implications are suggested for improving the effectiveness of e-learning system at BKU.
Gender Effect on Cloud Computing Services Adoption by University Students: Case Study of Saudi Arabia
Authors: Almazroi Abdulwahab Ali , Kabbar Eltahir , Naser Muawya , Shen Haifeng
Published: February 2020

Cloud computing is a state of the art technology that provides services to individuals and organizations on demand via the Internet. Implementation of cloud services in an organization will lead to improved performance and reduced cost related to computing services. A number of previous studies suggest that there is a need to further investigate the role of gender on the adoption of cloud computing, especially in developing countries. The aim of this paper is to investigate the role of gender in the adoption of cloud computing services by university students in KSA. To meet the research objective an SEM study was conducted using responses from 451 Saudi higher education students to determine the role of gender on could computing acceptance in KSA context. The findings of this research show that there is a settle difference between female and male students where trust was found to be a significant determinant of behavioural intention for female students but not for their male counterparts. On the other hand, image was found to be a significant determinant of PU for male students but not for female students.
Los Tecno Recurso Laborales y su impacto en el Tecnoestrés. Un Caso empírico
Authors: Ruiz Domínguez Veronica Esperanza , Ríos-Manríquez Martha , Sánchez-Fernández María Dolores
Published: February 2020

The information and Communication Technologies (ICT) have changed how the professors in the Higher Education Institutions (HEI) conduct their activities that benefits their work and personal routines. Nevertheless, the lack of proper ICT tools needed to its implementation (Lack of Work Techno-resources-LWTR) causes stress disturbances, affecting the professor’s health. This research focuses in determine if the LWTR is defined by psychosocial factors as Techno-anxiety and Inefficiency. Also to understand if those factors contribute to the level of technostress in professors of the HEI in the Laja-Bajio region of Guanajuato, Mexico. The analysis includes a sample of 415 professors, and a descriptive, correlational and regression analysis. Results points that professors consider ICT as a factor to increase their self-efficiency, their work in teams and their autonomy, having enough technological equipment to accomplish their work activities. Results also showed that the Techno- anxiety is the factor that mostly influences in the Technostress. Besides, the multiple regression analysis determines the Lack of Work Techno-resources in the professors. In conclusion, this paper contributes to the knowledge of which factors, caused by the ICT, contributes to stress in higher education professors.
REGIONAL INNOVATION SYSTEMS AND UNIVERSITY COMPETITIVENESS
Authors: Stoimenova Borislava Borisova
Published: February 2020

This paper is a literature review, presenting the concept of regional innovation systems (RIS) and identifying criteria and indicators for measurement of university competitiveness within these systems. A regional innovation system is defined as an interactive learning engagement among a network of various actors within an institutional framework. It is built around the core idea that innovation stems from interactions within a network of different actors. The development of RIS is fostered by the European Commission in its attempts to make Europe and the EU the world’s most competitive and dynamic economy by embracing the whole innovation chain from education to economic impact, popular as the “knowledge triangle” of education, research and innovation. Universities contribute to the creation and dissemination of new knowledge and the generation of intellectual capital. In such context, the two most frequently cited criteria used to measure the university competitiveness are knowledge transfer and regional engagement. Knowledge transfer is defined by industry income, patents, co-publications with industrial partners, and spin-offs, while regional engagement – by graduates working in the region, student internships in the region, regional joint publications and income from regional sources.
Ecossistemas de inovação das universidades federais brasileiras: um mapeamento dos núcleos de inovação tecnológica, incubadoras de empresas de base tecnológica e parques tecnológicos
Authors: Pereira Rafael Morais , Marques Humberto Rodrigues , Gava Rodrigo
Published: February 2020

Technological innovation as an engine for development requires a structural apparatus to its consolidation, reinforcing the approach of innovation systems, with emphasis on the role of universities. Therefore, considering that associated with this potential are present several innovative elements, such as the Technological Innovation Centers (NITs), the incubators of technology-based companies (IEBTs) and Technology Parks (ParqTecs), and given the lack of systematization National these instruments, the ultimate goal of this study was to analyze the environment for innovation in Brazilian federal universities, through the mapping of NITs, the IEBTs and ParqTecs associated with these institutions, further outlining the relationship of these instruments with technological variables (technological scholarships and patents). We used a qualitative and quantitative approach, descriptive nature, with collection of secondary data on institutional sites of universities and the adoption of simple linear regression analysis. The results realized all 63 Brazilian federal universities and revealed that the most widespread instrument between universities are the NITs, since its presence in 86% of the analyzed institutions. Have business incubators, idealized to strengthen interaction in innovation systems, are associated with 68% of universities, enabling regional development contexts. In relation to technology parks, it was found that, depending on the expenditure required for its implementation, only 26 universities are integrated into ParqTecs. The contributions of this study are concentrated in addition to the mapping done in highlighting the distinctions between the Brazilian regions in terms of scientific and technological structure and the importance of innovation ecosystems.
Effects of innovation and social capital on economic growth: empirical evidence for the brazilian case
Authors: Pio João Gabriel
Published: February 2020

Technological innovation is an important mechanism for increasing productivity that provides growth and economic development to countries and regions. Recognized its effect, incentives for innovation and Research and Development  (RD) expenditures, the main input for innovation, were intensified in the first decade of the 2000s in Brazil, through laws and programs directed to specific sectors such as: the Innovation Law (2004) and Lei do Bem (2005), both with the aim of stimulating RD. Therefore, the present work makes use of a model that incorporates the innovation, aiming to evaluate its effects on the GDP. Given the importance of cooperations and collaboration networks to increase productivity, in a complementary way, the effects of social capital on Brazilian economic performance are analyzed. With a database composed of 297 observations analyzed between 2000 and 2010 for each federation unit, including the Federal District, this work uses the traditional panel data and dynamic panel method to measure the increase in the state GDP that these variables provided in the period. The results found point to a significant and positive effect of social capital and to non-significance of innovation. In addition, as evidenced by the literature, human capital is the main factor of increase of the Brazilian product.
Doubly Extended Fuzzy TOPSIS Method for Group Decision Making
Authors: Kacprzak Dariusz
Published: February 2020

Multiple Criteria Decision Making methods, such as TOPSIS, have become very popular in recent years and are frequently applied to solve many real-life situations. However, the increasing complexity of the decision problems analysed makes it less feasible to consider all the relevant aspects of the problems by a single decision maker. As a result, many real-life problems are discussed by a group of decision makers. In such a group each decision maker can specialize in a different field and has his/her own unique characteristics, such as knowledge, skills, experience, personality, etc. This implies that each decision maker should have a different degree of influence on the final decision, i.e., the weights of decision makers should be different. The aim of this paper is to extend the fuzzy TOPSIS method to group decision making. The proposed approach uses TOPSIS twice. The first time it is used to determine the weights of decision makers which are then used to calculate the aggregated decision matrix for all the group decision matrices provided by the decision makers. Based on this aggregated matrix, the extended TOPSIS is used again, to rank the alternatives and to select the best one. A numerical example illustrates the proposed approach.
Application of Iterated Filtering for Parametric Estimation of Instantaneous Variance in the Case of Non-Gaussian Ornstein-Uhlenbeck Stochastic Volatility Processes
Authors: Szczepocki Piotr
Published: February 2020

The article presents a method for parametric estimation of instantaneous variance in the case of non-Gaussian Ornstein-Uhlenbeck stochastic volatility process by means of the iterated filtering and realized variance estimator. The method is applied to realized variance of S&P500 index data. Empirical application is accompanied with simulation study to examine performance of the estimation technique.
Addressing the Pension Decumulation Phase of Employee Retirement Planning
Authors: Miguel Ventura Bravo Jorge
Published: February 2020

Longevity increases and population ageing create challenges for all societal institutions, particularly those providing retirement income, healthcare, and long-term care services. At the individual level, an obvious question is how to ensure all retirees have an adequate, secure, stable, and predictable lifelong income stream that will allow them to maintain a target standard of living for, however, long the individual lives. In this chapter, we review and discuss the main pension decumulation options by explicitly modelling consumers’ behaviour and objectives though an objective function based on utility theory accounting for consumption and bequest motives and different risk preferences. Using a Monte-Carlo simulation approach calibrated to US financial market and mortality data, our results suggest that purchasing a capped participating longevity-linked life annuity at retirement including embedded longevity and financial options that allow the annuity provider to periodically revise annuity payments if observed survivorship and portfolio outcomes deviate from expected (or guaranteed) values at contract initiation deliver superior welfare results when compared with classical annuitization and non-annuitization decumulation strategies.