bluuebunny/crossref_metadata_2025 huggingface dataset:
El impacto en el aprendizaje del programa Una Laptop por Niño. La evidencia de Uruguay
Authors: De Melo Gioia , Machado Alina , Miranda Alfonso
Published: March 2017

Antecedentes: En los últimos años muchos países han realizado inversiones sustanciales en los programas Una Laptop por Niño (OLPC, por sus siglas en inglés), en tanto que otros están por implementar este tipo de intervenciones. Este artículo contribuye al estudio del efecto que tienen los programas OLPC en el desempeño de los estudiantes en lectura y matemáticas y, para ello, utiliza un diseño cuasi experimental basado en datos de Uruguay, el primer país en implementar un programa OLPC a escala nacional: el Plan CEIBAL. Métodos: Empleamos una estrategia de diferencias en diferencias (DiD) para estimar el impacto del Plan CEIBAL en el desempeño educativo. El análisis explota especialmente el hecho de que el despliegue del programa se basó en criterios geográficos y no en el rendimiento escolar de los estudiantes. Se cuenta con la fecha exacta en que se le entregó la laptop a cada estudiante de la muestra. Ello nos permite hacer una medición continua y sin margen de error del tratamiento con base en el número de días en que cada estudiante ha estado expuesto al Plan CEIBAL al llegar la fecha de seguimiento (normalizado a años). Se controla por las diferencias sistemáticas que se dan potencialmente a lo largo del tiempo respecto a un mejor aprovechamiento escolar entre las escuelas en la capital, Montevideo, y el resto de Uruguay. Resultados: Nuestros resultados sugieren que el programa no tuvo impacto en las calificaciones en lectura y matemáticas. Tampoco encontramos efectos heterogéneos entre alumnos cuyas madres poseen distintos niveles de educación. Al analizar la evidencia descriptiva sobre la frecuencia de uso de la laptop en clase, observamos que su uso diario no está generalizado en todas las escuelas públicas. Además, su principal uso en clase consiste en la búsqueda de información en internet y no en la capacitación mediante ejercicios o prácticas de repetición. Una característica particularmente importante del programa es que la capacitación a los docentes ha sido opcional hasta el momento. Conclusiones: Nuestros resultados sugieren que, en los primeros dos años de su implementación, el Plan CEIBAL no tuvo efecto en los puntajes de matemáticas y lectura.
PEMANFAATAN TEKNIK IRRADIASI SINAR GAMMA UNTUK MENINGKATKAN VIABILITAS BENIH SENGON
Authors: Bramasto Yulianti , Putri Putri , P.K. Zanzibar P.K. Zanzibar , M. Danu M. Danu
Published: March 2017

Sengon (Albizia falcataria ) is the most potential species that develop in community forest with agroforestry system. The problem of  sengon plantation was the attack of pest and diseases, that influence the decrease of productivity of  sengon. To increase the  productivity of sengon  can be start  from the seed for example through  increase the  viability and vigor of seed. In seed crops, technique irradiation of  gamma rays have been used as seed treatment to increase vigor and quality of  seeds, but on forest seeds is still limited information. The purpose of this research is to analyze the effectiveness of the  irradiation of  gamma rays to increase viability of sengon  seed. The research design was  factorials in randomized completely design , which  consist of 2 factors, first factor was the origin of seeds and second  factor was the dosage of radiation.  The results show that the origin of seed and dosage of gamma rays gave a significant responses to germination percentage(DB) and speed of germination (KCT). In general the irradiation of gamma rays can increase the germination percentage (DB) and speed of germination (KCT).. The increasing of DB and KCT start at  dosage  5 Gy, and continue increase until  90 Gy. The viability of seed  raise from  13.5 % -  50,9 % from control. The  technique of gamma rays irradiation in low dosage can be used to increase viability and vigor  of sengon seed.Sengon (Albizia falcataria) merupakan salah satu jenis andalan di hutan rakyat, pada umumnya jenis ini ditanam menggunakan system agroforestry. Permasalahan pada tanaman sengon saat ini adalah banyaknya hama dan penyakit yang menyerang tegakan sengon, sehingga mengakibatkan menurunnya produktivitas. Peningkatan produktivitas dapat diupayakan sejak dari tingkat benih yaitu melalui peningkatan viabilitas dan vigor benih. Pemanfaatan teknik irradiasi sinar gamma   digunakan sebagai  seed treatment untuk meningkatkan vigor dan kualitas benih sudah banyak dilakukan pada benih tanaman pertanian, namun pada benih tanaman hutan masih terbatas. Tujuan dari penelitian ini adalah mengetahui efektivitas penerapan teknik irradiasi sinar gamma untuk meningkatkan viabilitas benih sengon. Rancangan penelitian yang digunakan adalah Rancangan Faktorial dalam Acak Lengkap, terdiri dari 2 faktor, yaitu asal benih dan faktor lainnya adalah dosis radiasi. Hasil penelitian  menunjukkan bahwa asal benih dan dosis sinar gamma berpengaruh nyata terhadap daya berkecambah dan kecepatan berkecambah benih sengon. Secara umum menunjukkan adanya peningkatan dalam perkecambahan yaitu daya berkecambah  (DB) dan kecepatan berkecambah (KCT)  akibat pemberian perlakuan irradiasi dengan sinar gamma. Peningkatan  DB dan KCT mulai terlhat pada dosis 5 Gy, dan terus meningkat hingga dosis 90 Gy.  Daya Berkecambah benih  meningkat antara 13,5 % – 50,9 % dari kontrol. Hal ini berarti teknik irradiasi sinar gamma pada dosis rendah dapat digunakan utnuk meningkatkan viabilitas dan vigor benih sengon.
Association between Alcohol Consumption, Folate Intake, and Risk of Pancreatic Cancer: A Case-Control Study
Authors: Yellow Winta , Bamlet William R. , Oberg Ann L. , Anderson Kristin E. , Olson Janet E. , Sinha Rashmi , Petersen Gloria M. , Stolzenberg-Solomon Rachael Z. , Jansen Rick J.
Published: March 2017

Pancreatic cancer is one of the most fatal common cancers affecting both men and women, representing about 3 percent of all new cancer cases in the United States. In this study, we aimed to investigate the association of pancreatic cancer risk with alcohol consumption as well as folate intake. We performed a case-control study of 384 patients diagnosed with pancreatic cancer from May 2004 to December 2009 and 983 primary care healthy controls. Our findings showed no significant association between risk of pancreatic cancer and either overall alcohol consumption or type of alcohol consumed (drinks/day). Our study showed dietary folate intake was modestly but significantly inversely associated with pancreatic cancer (OR=0.99, P <.0001). The current study supports the hypothesis that pancreatic cancer risk is reduced with higher food-based folate intake.
Chemical Characterization of Olive Pomace in the Northern Region of Jordan
Authors: Wedyan Mohammed , Abu Hanieh Bilal , Harahsheh Ahmed Al
Published: March 2017

In this study, the olive pomace was considered because of its importance in the environment. So, this study carried out to estimate the total nitrogen content and the fatty acids profile of olive pomace. The olive pomace samples were collected from Irbid, Jarash, Ajloun and Mafraq during the harvesting season 2014 to study the biochemical characteristics of fatty acid composition and the total nitrogen (TN) content. The total nitrogen content was determined by standard Kjeldahl method and the fatty acid profile was detected by gas chromatography (GC). The results show that the total nitrogen content ranged from (0.39 ± 0.0) to (0.62 ± 0.02) with statistically significant difference suggesting that the composition of matrices and their percentage may be responsible for composition of amendments. The calculated total protein percentage ranged between (2.43 ± 0.00) to (3.87 ± 0.17). Also, 13 different fatty acids were quantitatively profiled and quantitated. Oleic acid (C 18:1) was found to be the highest percentage of all other fatty acids and ranged between (59.03%) and (63.81%), moreover the C 18:1/C 18:2 (oil quality) was calculated and C.V% showed variation meaning that nutritional implication could affect the oxidative stability of oils. In conclusion, OP by-product could give a sustainable and alternative-cheap source for fertilizers, pharmaceutical industries, cosmetics and other industries.
Triphenylphosphine-(N,N-dimethyldithiocarbamato)-gold(I) Methanol Solvate
Authors: Bélanger-Desmarais Nicolas , Reber Christian
Published: March 2017

A gold(I) complex with a triphenylphosphine and a monodentate N,N-dimethyldithiocarbamate ligand was synthesized and characterized by Raman spectroscopy and single crystal X-ray diffraction. DFT calculations (Gaussian 09, PBE1PBE/Lanl2dz) were undertaken for a single complex in the gas-phase. The DFT-optimized structure is in good agreement with the crystal structure and the DFT-calculated Raman spectrum also is in excellent agreement with the experimental spectrum. Assignments of the Raman peaks are based on these DFT calculations. Frontier molecular orbitals were calculated and their nature is discussed.
Preformed-Particle-Gel Transport Through Heterogeneous Void-Space Conduits
Authors: Imqam Abdulmohsin , Wang Ze , Bai Baojun
Published: March 2017

Preformed particle gels (PPGs) have been successfully applied as a plugging agent to solve the conformance problem in fractured reservoirs. They are injected to plug fractures and then divert displacing fluid into poorly swept zones/areas. However, PPG-propagation and -plugging mechanisms through open void-space conduits (VSCs) have not been studied thoroughly. This paper investigated various situations involving heterogeneous conduits and their geometrical effect on PPG injectivity. Five-foot tubes were used to mimic VSCs. Three models were designed to gain understanding on how conduit geometry and PPG properties affect gel transportation, including a single conduit with a uniform internal diameter (ID); a single conduit with a nonuniform ID along its length; and two parallel conduits with different ID ratios with respect to each other. Results obtained from single-conduit models with uniform and nonuniform diameters showed PPG-injection pressure increased significantly as the conduit became more heterogeneous. Particle gels accumulated at the choke point within each conduit and caused injection pressure to increase accordingly. When two parallel conduits are available for flow, the relative distance of PPG penetration into the conduits depends strongly on the ratio of the conduit diameters and the gel strength. In addition, the ratio of gel-particle-size diameter to conduit diameter contributes significantly to the gel-transport selection. This paper demonstrates important impact elements of gel propagation for different heterogeneous-conduit situations.
Aspects of Scale Deposition in a Compositional Coupled Wellbore/Reservoir Simulator
Authors: Abouie Ali , Korrani Aboulghasem Kazemi , Sepehrnoori Kamy
Published: March 2017

Scale deposition in surface and subsurface production equipment is one of the major operational problems encountered during oil production, which results in equipment corrosion, wellbore plugging, production rate decline, and requires frequent squeeze treatments. Oil field scales mainly result from changes in the physicochemical properties (pH, temperature, and pressure), mixing with incompatible brine compositions, and mixing with inhibitors. Meanwhile, comprehensive modeling and prediction of scale formation has remained challenging due to the complexity of the geochemical reactions that occurs in real fields.

For the first time and to overcome the lack of comprehensive geochemical-based tools, a robust, accurate, and flexible coupled reservoir and wellbore model is developed, and then, integrated with a geochemical tool (i.e. IPhreeqc) to predict scale formation from injection wells through the reservoir to production wells. IPhreeqc, the United States Geological Survey (USGS) geochemical tool, has the capability of modeling homogenous and heterogeneous, reversible and irreversible, and ion-exchange reactions under non-isothermal, non-isobaric, and local equilibrium or kinetic conditions. In this work, by integrating IPhreeqc with the compositional reservoir (UTCOMP) and wellbore simulator (UTWELL), the geochemical capabilities of IPhreeqc is used in a multi-physics reservoir/wellbore models for comprehensive prediction of carbonates and sulfates scales deposition. Moreover, the effects of weak acids and hydrocarbon phase dissolution in the aqueous phase were included to accurately predict the carbonate scale profile.

To the best of our knowledge, there is no comprehensive simulator available in the industry through which scale deposition in the reservoir and wellbore can be predicted accurately. In this paper, scale deposition profile in the field is estimated by including 1) the interaction of the hydrocarbon and aqueous phases and its effect on the aqueous-scale geochemistry 2) effects of parameters that vary greatly in the field (i.e. pressure, temperature, and pH) and 3) comprehensive geochemistry simulation (provided through coupling of the simulators with IPhreeqc). The outcome of this study yields a comprehensive tool for prediction of scale deposition profile and will help scale deposition risk management and mitigation plans.
Understanding Fluid Transport Mechanisms of Fracture Shale Formations by Modelling Squeeze Treatments
Authors: Kaur Amarpreet , Frigo Dario M. , Stalker Robert , Graham Gordon M.
Published: March 2017

With developing interest in unconventional fields, such as fractured shales, there has been a need to develop models that accurately reflect the fluid-transport mechanisms in such formations. The current paper does this from the viewpoint of modelling scale inhibitor squeeze treatments.

Unlike conventional reservoirs, where chemical transport is dominated by pressure differentials from pumping, in ultra-low permeability systems imbibition and diffusion processes can be as important, if not more so. We report a model that numerically solves either the imbibition equation or Fick's second law of diffusion to simulate these transport mechanisms, and couples these processes to inhibitor adsorption and desorption using either Freundlich or Langmuir isotherms. As only a fraction of the production interval is typically treated, the model interactively allows the user to select which fractures have been treated. The influence of partial treatment of the fracture network on overall treatment effectiveness is presented as is the effect of varying entry location of the produced water into the well.

The model was also developed to simulate spontaneous imbibition of the aqueous inhibitor solution in combination with inhibitor adsorption, albeit in the absence of diffusion. The effect of this imbibition has been evaluated from the perspective that it acts as a potential "treatment thief" because it preferentially transports the applied inhibitor solution into oil-producing zones, whence it should contribute very little to mitigation of the current scaling risk.
Antibacterial activity of Euphorbia antiquorum latex
Authors: Kumara A.A.J.P. , Jayratne D. L. , Samaranayake G. V.
Published: March 2017

Euphorbia antiquorum is a large shrub or small tree belonging to the largest and the most diverse family in the plant kingdom, Euphorbiaceae. E. antiquram latex was used as a classical binding agent for the kshara sutra in the management of the anal fistula. In the present study, an attempt was made to evaluate the antimicrobial properties of latex of E. antiquorum on certain microbes. The methanolic extract of the latex was prepared. The fractions of methanol extract were tested for their antibacterial activity against the Gram positive bacteria, Streptococus agalactiae and Staphylococcus aureus and Gram negative bacteria Escherichia coli and P. aeruginosa. The results revealed that the latex showed minimum inhibition only to E. coli and S. aureus. Latex did not posses antibacterial activity against S. agalactiae and P. aeruginosa. The results suggest that the E. antiquorum latex extract account for the antibacterial properties and has a potential for use as an antimicrobial agent.
La sacra doctrina como ciencia imperfecta quoad nos en Tomás de Aquino: Nuevas reflexiones a partir de algunas ediciones críticas recientes
Authors: Carrasquillo Francisco Romero
Published: March 2017

Como es bien sabido, en su Suma teológica Tomás de Aquino defiende desde una perspectiva aristotélica la naturaleza científica de la sacra doctrina, proponiéndola como una ciencia subalterna al conocimiento que Dios tiene de sí mismo.  La interpretación de Tomás en torno a la doctrina aristotélica de la ciencia le permite proponer que las conclusiones de la sacra doctrina se reducen a los artículos de la fe como a sus primeros principios.  Lo que no es bien sabido, sin embargo, es que Tomás en otros textos cambia su postura sobre el modo en que la sacra doctrina llena los requisitos para ser ciencia.  Esto ha sido puesto en evidencia en parte por algunas ediciones críticas recientes, como la de la Lectura Romana, realizada por Boyle, y especialmente la del prólogo al Comentario a las Sentencias, por Adriano Oliva.  Si bien los artículos de la fe son evidentes en sí mismos (per se), estos textos, vistos cronológicamente, demuestran que a través de su carrera Tomás vacila en reconocer que desde nuestra perspectiva (quoad nos) los artículos no son evidentes ni demostrables, sino que son objetos de fe religiosa.  A través de estos textos Tomás progresivamente admite que existe una imperfección en el modo en que la conocemos en esta vida (in via); por tanto, la sacra doctrina en cierto modo se queda corta de la ratio perfecta de ciencia, al menos quoad nos.
Mariana Gardella. Las críticas de los filósofos megáricos a la ontología platónica
Authors: Barrionuevo Sergio Javier
Published: March 2017

El libro Las críticas de los filósofos megáricos a la ontología platónica de Mariana Gardella emprende una tarea hermenéutica vacante en los estudios de filosofía antigua, rescatando el lugar de los filósofos megáricos en el contexto de la filosofía griega del siglo IV a.C. Para este propósito busca recuperar no sólo las teorías y argumentos filosóficos propuestos por los miembros de dicha escuela, sino también el ámbito intelectual en el cual se inscriben los discursos.
Recepción y apropiación de la filosofía práctica aristotélica en la Filosofía del derecho de Hegel
Authors: Elorduy Eduardo Charpenel
Published: March 2017

Abstract En el presente artículo se examina la relación de la Filosofía del derecho de Hegel con la filosofía práctica aristotélica. Con ello se pretende mostrar, por una parte, que algunas de las tesis y motivos centrales de la filosofía del derecho hegeliana se entienden de mejor forma trayendo a primer plano ciertos planteamientos aristotélicos y, por otro lado, que dichos planteamientos son objeto de una reinterpretación y reelaboración por parte de Hegel ante ciertas exigencias históricas y filosóficas del contexto moderno. En particular, se examina la relación entre estos dos autores atendiendo a dos puntos concretos: la metodología holística de una filosofía práctica –entendida de modo amplio– y la teoría de la motivación ética. In this article I examine the relation of Hegel’s Philosophy of Right with the Aristotelean practical philosophy. My aim with this is to show, on the one hand, that some of the theses and central motifs of the Hegelian philosophy of right are better understood if one brings certain Aristotelean ideas to the forefront of the discussion and, on the other hand, that these ideas are subjected to a reinterpretation by Hegel due to the historical and philosophical demands of the Modern Age. In particular, the relationship between these two authors is analyzed by examining two specific subjects: the holistic methodology of a practical philosophy –broadly construed– and the theory of ethical motivation.  Palabras clave: Aristóteles, Hegel, Filosofía del derecho, Ética normativa, Metodología ética, Teoría de la motivación ética, Virtud y deber, Historia de la recepción del aristotelismo Key Words: Aristotle, Hegel, Philosophy of Right, Normative Ethics, Methods in Ethics, Theory of Ethical Motivation, Virtue and Duty, History of the Reception of Aristotelianism
Measurement of adhesion strengths and energy between calcium carbonate cake and filter cloth
Authors: Ginisty P. , Legoff B. , Olivier J. , Vaxelaire J. , Tabuteau H. , Paixao J.
Published: March 2017

Various devices in liquid-solid separation require mechanical cake discharge using different technologies. An incomplete cake discharge causes yield losses, cycle time increase, irregular cake formation, high mechanical constraints which decrease medium life time, excess consumption of cleaning liquors…. Currently, cake discharge is only assessed qualitatively by observations of filter cloth after discharge or quantitatively by weighing recovered solids. A prototype has been developed to carry out reliable and repeatable measurements by removing filter cloth from filter cake by shearing. This study presents results of experiments performed with calcium carbonate (which forms sticky cakes) and discusses the conditions of cake formation and cake detachment from filter cloth. It highlights the role of two main parameters: filter cloth characteristics and pressure.
Energy capture and nutrients removal enhancement through a stacked constructed wetland incorporated with microbial fuel cell
Authors: Xu Lei , Zhao Yaqian , Wang Tongyue , Liu Ranbin , Gao Fei
Published: March 2017

To improve the sustainability of constructed wetlands (CWs), a novel tiered wetland system integrated with a microbial fuel cell (MFC) was developed in this study. Compared to the single stage CW, chemical oxygen demand (COD) removal efficiency was improved from 83.2% to 88.7%. More significantly, this tiered system significantly enhanced total nitrogen removal efficiency (an increase from 53.1% to 75.4%). In terms of MFC integration, a gradually decreased performance in electricity production was observed during its 3 months of operation (the voltage dropped from nearly 600 mV to less than 300 mV), which resulted in a reduction of power density from around 2 W/m3 to less than 0.5 W/m3. The deterioration in performance of the air-cathode is the main reason behind this, since the electrode potential of the cathode under open circuit reduced from 348.5 mV to 49.5 mV while the anode potential kept constant at around −400 mV. However, in spite of its electrical performance reduction, it was proved that MFC integration enhanced COD removal and the nitrification process. Further work is needed to improve the stability and feasibility of this new system.
Complications During Maxillary Sinus Augmentation Associated with Interfering Septa: A New Classification of Septa
Authors: Irinakis Tassos , Dabuleanu Valentin , Aldahlawi Salwa
Published: March 2017

Purpose:

A new classification of maxillary sinus interfering septa based on its orientation is presented along with its relationship to the prevalence and severity of sinus membrane perforations. Additionally, the impact of membrane perforation on post-operative complications and marginal bone loss during the first year of loading is evaluated.

Materials & Methods:

Retrospective chart review of 79 consecutive sinus lift procedures with lateral window technique and 107 implants. Preoperative Cone Beam Computed Tomography (CBCT) images were evaluated for the incidence and the direction of maxillary septa. Chart notes were examined for the incidence of membrane perforation and postoperative complications. Measurements of mesial and distal marginal bone levels and average bone resorption adjacent to each implant were calculated in intraoral radiographs taken at implant placement and during follow up appointments.

Results:

Interfering septa were identified in 48.1 percent of sinuses. 71.1 percent of them had the septum oriented in a buccal-lingual direction (Class I). The overall incidence of membrane perforation was 22.8 percent, and the presence of an interfering septum on CBCT scan was found to be significantly associated with the occurrence of a sinus membrane perforation (P<0.001). The mean implant marginal bone loss for sinuses, which did not experience a membrane perforation, was 0.6±0.8mm, compared with 0.9 ± 0.9 mm for the sinuses that did experience a perforation (P = 0.325).

Conclusion:

Septa should be identified, classified and managed with a meticulous attention to technical details. A classification based on the septal orientation is proposed since the orientation of the septa can complicate the surgical procedure and requires modification of the surgical technique.
What is the Optimal Reconstruction Option after the Resection of Proximal Humeral Tumors? A Systematic Review
Authors: Dubina Andrew , Shiu Brian , Gilotra Mohit , Hasan S. Ashfaq , Lerman Daniel , Ng Vincent Y.
Published: March 2017

Purpose:

The proximal humerus is a common location for both primary and metastatic bone tumors. There are numerous reconstruction options after surgical resection. There is no consensus on the ideal method of reconstruction.

Methods:

A systematic review was performed with a focus on the surgical reconstructive options for lesions involving the proximal humerus.

Results:

A total of 50 articles and 1227 patients were included for analysis. Reoperation rates were autograft arthrodesis (11%), megaprosthesis (10%), RSA (17%), hemiarthroplasty (26%), and osteoarticular allograft (34%). Mechanical failure rates, including prosthetic loosening, fracture, and dislocation, were highest in allograft-containing constructs (APC, osteoarticular allograft, arthrodesis) followed by arthroplasty (hemiarthroplasty, RSA, megaprosthesis) and lowest for autografts (vascularized fibula, autograft arthrodesis). Infections involving RSA (9%) were higher than hemiarthroplasty (0%) and megaprosthesis (4%).

Postoperative function as measured by MSTS score were similar amongst all prosthetic options, ranging from 66% to 74%, and claviculo pro humeri (CPH) was slightly better (83%). Patients were generally limited to active abduction of approximately 45° and no greater than 90°. With resection of the rotator cuff, deltoid muscle or axillary nerve, function and stability were compromised even further. If the rotator cuff was sacrificed but the deltoid and axillary nerve preserved, active forward flexion and abduction were superior with RSA.

Discussion:

Various reconstruction techniques for the proximal humerus lead to relatively similar functional results. Surgical choice should be tailored to anatomic defect and functional requirements.
Withdrawn: The Behavioral Profile of Methylenedioxypyrovalerone (MDPV) and α– pyrrolidinopentiophenone (PVP) - A Systematic Review
Authors: Stanciu Cornel N. , Penders Thomas M. , Gnanasegaram Samantha A. , Pirapakaran Elvin , Padda Juvraj S. , Padda Jeeven S.
Published: March 2017

The article entitled, "The Behavioral Profile of Methylenedioxypyrovalerone (MDPV) and α–
pyrrolidinopentiophenone (PVP) - A Systematic Review", submitted in Current Drug Abuse
Reviews (CDAR) by Dr. Cornel N Stanciu has been withdrawn from the journal in accordance
with BSP Editorial Policies.
Activated Salivary MMP-2 - A Potential Breast Cancer Marker
Authors: Bhattacharyya Nabanita , Mondal Subhajit , Ali Mohammad Nasim , Mukherjee Ramanuj , Adhikari Anjan , Chatterjee Amitava
Published: March 2017

It has been reported that Matrixmetalloproteinase-2 (MMP-2) is involved in the pathogenesis of cancer. The over expression of MMP-2 is associated with the progression of malignancy of several types of carcinoma. Human saliva is a biological fluid with several advantages for non-invasive diagnosis and prognosis of diseases. The aim of this study was to detect MMPs expression and activity in biological fluids (saliva, urineetc.) derived from breast cancer patients. Here, our results showed that the activity of MMP-2 was higher at the time before the surgery than after the saliva collected from the same patients. Therefore, we suggested that the highly active form of MMP-2 presented in saliva could be used as a novel potential biomarker for non-invasive diagnosis of breast cancer.
Introduction, Cuba Conference: Research Foundations for Understanding Books and Reading in the Digital Age: E/Merging Reading, Writing, and Research Practices
Authors: Crompton Constance , Siemens Raymond
Published: March 2017

The fourth of the Implementing New Knowledge Environments (INKE) “Birds of a Feather” gatherings took place between December 11 and 14, 2012, and included Cuban academic site visits to the National Library and the Casa de las Américas, one of the most preeminent publishers in Latin America. In addition to exploring opportunities for partnership and collaboration in the Americas through unconference discussions, at the conference, the group shared work centred around the digital scholarly edition through the Birds of a Feather structured presentation and discussion.
Becoming a Nurse Scientist: The Critical Role of Mentorship, Collaboration, and Foundational Experiences as a Graduate Student
Authors: Doucet Shelley
Published: March 2017

This article is a narrative of my journey to becoming a nurse scientist, which began as an undergraduate student in nursing. Throughout this paper, I share the ingredients that have been critical to my success as a new scientist, how my past and present perceptions of the role of a scientist have evolved, and the personal benefits I have experienced in this role. I conclude with a summary of how I perceive the scientific work that I do contributes to knowledge and society. Overall, my mentors, collaborative networks, and foundational experiences as a graduate student have laid the foundation for my career as a new scientist and have prepared me to conduct multi-method intersectoral research, which I believe is critical to informing health policy.
Uma educação básica em relações étnico-raciais: alunos em cena no ensino de história em Quixadá
Authors: Oliveira Valéria Soares de , Silva Isaíde Bandeira da , Barros Vilarin Barbosa
Published: March 2017

Neste trabalho, apresentamos uma análise acerca de práticas racistas manifestadas através de “brincadeiras” cotidianas em escolas do município de Quixadá, no Ceará (CE). A problemática foi detectada na fala de diversos(as) alunos(as) quando da realização de entrevistas para uma pesquisa, na qual abordamos o racismo no Brasil. A partir delas, percebemos que os(as) estudantes entrevistados(as) ressaltavam, no contexto escolar, supostas “brincadeiras” que, na verdade, bem podem trazer marcas de práticas racistas. Por isso, fizemos um recorte das entrevistas para melhor avaliar essas práticas, muitas vezes naturalizadas, no espaço escolar e dialogamos os relatos com autores que tratam das relações étnico-raciais como Munanga (2005), Sales Jr. (2006) e Fanon (2008). Compreender a vivência escolar e as relações nesse espaço se faz necessário para que a temática seja debatida e problematizada na academia, bem como nos mais variados setores de nossa sociedade.
Das muitas cores de uma cidade: o projeto Roxo-Rei e as memórias de negros e de índios na paisagem de Ouro Preto
Authors: Cunha Nara Rúbia de Carvalho
Published: March 2017

Este artigo apresenta parte de um projeto desenvolvido, em 2014, entre o Museu Casa Guignard e uma escola da educação básica de Minas Gerais, que enfocou a paisagem da cidade de Ouro Preto numa produção de conhecimentos histórico-educacionais em diálogo com a arte. Em especial, recorta-se a primeira parte desse projeto, na qual foi promovida uma reflexão sobre a presença de índios e de negros na formação dessa paisagem e foi fomentada uma discussão que entrelaçava diferentes temporalidades, promovendo uma comparação entre presente e passado.
Desafios para a educação escolar específica em contextos de políticas universalizantes
Authors: Brighenti Clovis Antonio
Published: March 2017

Neste artigo, desenvolvemos uma análise crítica do sistema de ensino no que tange às políticas universalizantes e os desafios para a educação escolar específica e diferenciada conquistada pelos povos indígenas. Na medida em que esses direitos específicos foram sendo alargados e tornados realidade, o Ministério da Educação criou diversos mecanismos que circulam na contramão, valorizando e exigindo conhecimento de saberes ditos universais. Como exemplo, tomamos os dados colhidos junto ao Índice de Desenvolvimento da Educação Básica (Ideb) relativos à avaliação das escolas indígenas em Santa Catarina nos anos de 2011 e de 2013 e constatamos que as mesmas ficaram entre as piores colocações no estado. Buscamos, então, compreender a metodologia e a ideologia que orientaram as avaliações, do que percebemos que há a imposição de conteúdos e de práticas metodológicas. A avaliação, sem respeitar suas particularidades, segue sendo uma maneira de impor aos indígenas a integração à “nação” brasileira. A partir dos conceitos de colonialidade, concluímos que, ao persistir esse modelo de avaliação, as notas baixas servirão como formas de resistência.
Ensino de filosofia no Ensino Médio sob a perspectiva das Leis nº 10.639/03 e nº 11.645/08
Authors: Coelho Cleber Duarte
Published: March 2017

Este artigo objetiva analisar o ensino de filosofia no Ensino Médio, considerando-se as Leis nº 10.639/03 e nº 11.645/08. Constatamos, pela nossa prática de ensino, quando docentes em escolas e, posteriormente, como supervisores de estágios supervisionados, que o cumprimento dessas leis é praticamente inexistente. Pela abordagem de autores que estudam o problema e de leis que regem o assunto, realizamos uma pesquisa bibliográfica e documental do tema, buscando fazer encaminhamentos à pratica docente que contemplem o que é exigido nas referidas leis. Consideramos que, embora haja deficiência na formação dos professores, uma vez que essa formação é eurocêntrica, há boas perspectivas para que o trabalho docente contemple as leis destacadas.
Ciência, tecnologia, inovação e desenvolvimento no Programa de Empreendedorismo da Universidade Tecnológica Federal do Paraná
Authors: Santos Josieli Soares dos , Teixeira Edival Sebastião , Marini Marcos Junior
Published: March 2017

No Brasil, têm sido desenvolvidas políticas de apoio a processos de inovação tecnológica para empresas, com a finalidade de propiciar a estas melhores condições para que se mantenham saudáveis no mercado e melhorem seu potencial competitivo. É nesse contexto que se insere o Programa de Empreendedorismo e Inovação (Proem), desenvolvido na Universidade Tecnológica Federal do Paraná (UTFPR), campus Cornélio Procópio. O presente artigo resulta de pesquisa que analisou os modos pelos quais participantes desse programa concebem as relações existentes entre ciência, tecnologia, inovação e desenvolvimento. Para tanto, participaram voluntariamente da investigação 14 sujeitos que atuam no Proem, sendo eles gestores de empresas graduadas, gestores de empresas incubadas, gestores de empresas pré-incubadas e servidores da UTFPR. Os dados foram coletados mediante entrevista semiestruturada, cujo roteiro focava nos modos como os participantes concebem as referidas relações e as implicações sociais destas. A análise foi feita mediante interpretação das respostas dadas pelos sujeitos nas entrevistas. Os resultados obtidos indicam a presença de elementos do pensamento positivista. Foi possível verificar uma aproximação das concepções dos participantes com o modelo de desenvolvimento segundo o qual quanto mais se gera ciência, mais se gera tecnologia e, quanto mais tecnologia há, por consequência, mais se produz riqueza e bem-estar social – o qual, por sua vez, está na base da teoria schumpeteriana.
Sobre o “fazer periferia”: experiências, narrativas e reflexões a partir de um estudo etnográfico
Authors: Antunes Camila Sissa
Published: March 2017

Este artigo discute parte dos resultados de um estudo etnográfico desenvolvido junto às moradoras de dois bairros periféricos da cidade de Chapecó, em Santa Catarina (SC). A pesquisa buscou enfatizar articulações entre território e experiência, em suas dimensões práticas e simbólicas, de forma que se destacam cenários de socialidades, que envolvem lugares e referências identitárias (de pertencimento ou de distanciamento) e outras formas de subjetivação do território, que consolidam relações processuais de construção da periferia. A proposta deste trabalho é refletir a condição da periferia e da cidade como lugares em processo, apreendidas, a partir de territorializações e de mobilidades, identificadas durante a etnografia e construídas a partir da perspectiva dialógica, enfatizando experiências e narrativas do cotidiano. Assim, a proposta, neste artigo, é apresentar as processualidades que encontramos nas mobilidades pelo território, que aparecem com maior ênfase nas áreas irregulares dos bairros pesquisados e que são reconhecidas pelos sujeitos da pesquisa como “direito”. Percebemos, no contexto de abordagem, uma circulação das pessoas pelo território, alternando o lugar de moradia, acessando novas formas de morar, realizando transferências e reocupações, etc. As histórias de mobilidades nos permitem vislumbrar a complexidade dos processos inerentes à constituição das periferias urbanas e expressam, através de práticas cotidianas e de narrativas de mobilidade, maneiras através das quais articulam, em suas vivências, sempre relacionais e partilhadas, significados, afetividades e estéticas de sentido que configuram a experiência dinâmica, contínua e processual de “fazer-periferia” e de “fazer-cidade”.
Evaluating Inferences: the Nature and Role of Warrants
Authors: Pinto Robert C.
Published: March 2017

Following David Hitchcock and Stephen Toulmin, this paper takes warrants to be material inference rules. It offers an account of the form such rules should take that is designed (a) to implement the idea that an argument/inference is valid only if it is entitlement preserving and (b) to support a qualitative version of evidence proportionalism. It attempts to capture what gives warrants their normative force by elaborating a concept of reliability tailored to its account of the form such rules should take.
ANALISIS PENGGUNAAN ELEKTROLISER TERHADAP EMISI GAS BUANG CO DAN HC PADA SEPEDA MOTOR 4 LANGKAH MERK SUZUKI SHOGUN 125 CC TAHUN PEMBUATAN 2010
Authors: Mahendro Sigit
Published: March 2017

Pada penelitian ini digunakan motor tipe 4 langkah merk Suzuki Shogun 125 cc dengan tahun pembuatan 2010. Pengambilan data uji emisi gas buang dilakukan ketika motor sebelum dan sesudah memakai elektroliser dengan berbagai campuran elektrolit. Data diambil berdasarkan perubahan putaran mesin mulai dari 1000 rpm sampai 4000 rpm. Hasil tertinggi untuk CO terjadi pada RPM 4000 dengan campuran elektrolit aquades dan 1 ½ sendok makan KOH dengan nilai 1,04 %. Sedangkan CO terendah terjadi pada RPM 3200 ketika motor tidak menggunakan elektroliser dengan nilai 0,07%. Untuk HC tertinggi ada pada RPM 1000 ketika motor tidak menggunakan elektroliser dengan nilai 382 ppm. Sedangkan HC terendah terjadi pada RPM 4000 dengan campuran elektrolit aquades dan KOH sebanyak ½ sendok makan sebanyak 20,33 %. Dimana nilai tertinggi CO2 adalah 8,2% ada pada 2 campuran elektrolit yaitu campuran pertama adalah elektrolit aquades dengan KOH sebanyak 1 sendok makan dan campuran kedua adalah ketika motor menggunakan elektroliser dengan elektrolit hanya aquades saja. Sedangkan untuk nilai CO2 terendah bernilai 4,1%. Berdasarkan pengambilan data-data tersebut, nilai emisi gas buang pada sepeda motor ini masih ada dibawah standar KEPMEN LH 05/2006.
ANALISA KINERJA REFRIGERASI WATER CHILLER PADA PT GMF AEROASIA
Authors: Nugroho Ali
Published: March 2017

Pengkondisian udara merupakan salah satu hal yang paling penting dalam suatu industri atau gedung, khusunya pada suatu gedung perkantoran. Karena dengan sistem pengkondisian udara yang baik akan menghasilkan uadara segar yang akan memperoleh kenyamanan bagi manusia, mesin, maupun lingkungan yang berada disekitar. Karena dengan tingkat kenyamanan yang baik akan meningkatkan kinerja dari mesin yang digunakan. Ketidak sesuaian pola pengoperasian sistem refrigerai pada saat perancangan dengan keadaan aktual merupakan salah satu penyebab tingginya konsumsi energi listrik, oleh karena itu perlu dilakukan analisa performansi pada sistem refrigerasi di sana agar dapat diketahui apakah energi yang digunakan sudah efisien. Untuk menganalisia kinerja mesin water chiller ini dilakukan dengan pengamatan langsung terhadap panel control water chiller selama empat jam sekali secara continue selama lima hari. Dan dilakukan perhitungan dari data tersebut untuk mengetahui nilai effisiensinya yaitu: COP, laju aliran refrigerant, kalor yang diserap evaporator dan kondensor, kerja yang dilakukan kompresor, daya yang dibutuhkan kompresor, dan laju aliran volume air cooling water. Kinerja chiller yang baik mempunyai efisiensi yang dapat dipengaruhi antara lain oleh: temperatur air keluar evaporator, dan temperaturr air masuk kondensor. Hasil penelitian hari sabtu diperoleh nilai COP = 8,04, Pref = 0,44 kW/TR, TR = 112,961 TR, dan laju massa refrigerant evaporator = 2,415 kg/s, kerja yang dilakukan kompresor = 49,395kW, laju aliran volume cooling tower = 94,613 m3/jam, dan laju aliran volume make-up water = 0,567 m3/jam. Maka di simpulkan semakin rendah temperatur refrigerant di kondensor maka akan semakin bagus juga nilai COP yang dihasilkan(KW/TR semakin rendah), karena kerja kompresor yang dibutuhkan akan lebih rendah.
ANALISA KEHILANGAN ENERGI PADA FIRE TUBE BOILER KAPASITAS 10 TON
Authors: Aji Nugroho Aditio Primayudi
Published: March 2017

Tujuan dari penulisan ini adalah menghitung kinerja boiler dengan mengetahui kerugian energi pada saat produksi steam. Analisa teknis pada boiler sangat diperlukan, sebagai upaya peningkatan efisiensi dan mengetahui banyaknya energi yang terbuang sebagai kerugian. Faktorfaktor penyebab kehilangan panas/heat loss terbesar pada boiler antara lain : “kehilangan panas akibat gas buang kering, kandungan steam dalam gas buang, kandungan air dalam bahan bakar, kandungan air dalam suplai udara dan lain-lain”.Kehilangan panas/heat loss atau juga bisa disebut kehilangan energi merupakan salah satu faktor penting yang sangat berpengaruh dalam mengidentifikasi efisiensi pada boiler.Untuk itu dilakukan studi analisa dengan perhitungan kehilangan panas dengan tujuan untuk mengetahui besarnya penurunan performance dan penyebab dari penurunan performance. Berdasarkan data dan analisa metode direct diketahui penurunan sebesar 21% pada kondisi normal (operasi) 79% dan dari hasil perhitungan kehilangan panas indirect sebesar 16.68% efisiensi boiler sebesar 83.32% maka dari itu adanya kehilangan panas, perlu adanya perbaikan dalam control pengaturan bahan bakar dan udara yang masuk secara optimum dengan cara menggunakan Oxygen Trim Control yang berfungsi untuk mengukur konsentrasi oksigen pada cerobong dan secara otomatis mengatur oksigen pada udara yang masuk burner sehingga dihasilkan pembakaran dengan efisiensi yang optimal.dan dengan menggunakan economizer pada pemanasan awal suhu air umpan dapat menaikan efisiensi boiler.
ANALISA PERHITUNGAN BEBAN COOLING TOWER PADA FLUIDA DI MESIN INJEKSI PLASTIK
Authors: Suhardi Putra Raden
Published: March 2017

Dalam  penggunaan material plastik sebagai komponen dan spare part, dan di industri otomotif kini banyak menggunakan mesin pencetak palstik dalam pembuatan produk. Pada proses pencetakan plastik diperlukan pendinginan baik itu mesin dan juga cetakannya (mold) agar terhindar dari kerusakan atau deffect yang terjadi akibat suhu yang terlalu panas sehingga mengakibatkan terganggunya proses pencetakan. Salah satu proses pendinginannya adalah menggunakan sistem cooling tower sebagai alat dan air sebagai media fluidanya, yang  berguna untuk menjaga dan menstabilkan suhu pada mold dan mesin. Dalam proses pendiginannya, Cooling Tower memiliki beban, effisiensi, penggunaan  make-up water dan persentasinya, serta effek yang diakibatkan jika suhu mesin terlalu panas pada mold atau mesin. Pada analisa didapatkan suhu maksimal yang baik untuk cooling tower dari segi beban, effisiensi, make-up water, dan effek nya agar proses pencetakan dapat berjalan dengan baik. Effisiensi (%) yang baik untuk beban cooling tower pada analisa adalah suhu T1db 33°C kelembapan 80%, dan suhu T2db 36°C kelembapan 90%. Make-up water yang paling ekonomis pada cooling tower pada analisa dengan suhu T1db 33°C dan T2db 36°C dengan kelembapan 80%, dan 90%.
ANALISIS PENGARUH VARIASI CDI TERHADAP PERFORMA DAN KONSUMSI BAHAN BAKAR HONDA VARIO 110cc
Authors: Ramdani Sachrul
Published: March 2017

Pada tulisan ini penulis melakukan penelitian baik secara pengujian maupun secara teori, disini dilakukan pengujian terhadap sepeda motor Honda Vario 110 cc menggunakan CDI yang berbeda yaitu yang pertama menggunakan CDI standar, yang kedua menggunakan CDI dual band (clik 1) dan yang ketiga menggunakan CDI dual band (clik 2), pengujian ini dilakukan di bengkel ultraspeed racing dengan mengunakan Dynojet untuk mendapatkan hasil torsi dan daya, kemudian untuk konsumsi bahan bakar dilakukan pengujian dengan cara menghitung waktu lama motor menghabiskan bahan bakar sebanyak 100 ml dengan menggunakan ketiga CDI tersebut. Berdasarkan hasil penelitian dengan cara pengujian performa mesin diketahui bahwa dengan menggunakan CDI standar torsi tertinggi yang dapat dihasilkan 7,517 N.m di rpm 6000, daya tertinggi yang dapat dihasilkan CDI standar 5,712 kW di rpm 8000, sedangkan menggunakan CDI dual band (clik 1) torsi tertinggi yang dihasilkan 7,558 N.m pada rpm 6000, daya tertinggi yang dihasilkan CDI dual band (clik 1) 5,81 kW pada rpm 8500 dan dengan mengunakan CDI dual band (clik 2) torsi tertinggi yang dihasilkan 7,511 N.m pada rpm 6500 sedangkan daya tertinggi yang dihasilkan 5,835 kW di rpm 8500 dan untuk pengujian konsumsi bahan bakar pengunaan CDI standar lebih irit dibandingkan pengunaan CDI dual band (clik 1) dan CDI dual band (clik 2).
ANALISIS PERBANDINGAN EVAPORATOR KULKAS (LEMARI ES) DENGAN MENGUNAKAN REFRIGERANT R-22 DAN R-134A
Authors: Faozan Imam
Published: March 2017

Tulisan ini bertujuan untuk mengetahui komponen mesin refrigerasi khususnya pembahasan evaporator. Dalam penelitian ini digunakan lemari pendingin (kulkas ) sederhana untuk pengawetan dan pendinginan bahan makanan dalam rumah tangga. Untuk refrigerant yang digunakan adalah Refrigerant Freon  R – 22 dan  Freon R - 134a sebagai perbandingan dan untuk mengetahui performance evaporator ( COP ) pada mesin refrigerasi untuk rumah tangga. Lemari pendingin yang dianalisa berukuran tinggi  = 1 m, panjang  = 0,55 m  dan lebar 0,5 m. Temperatur evaporasi = -5°C dan temperature kondensasi = 40°C.
ANALISA LAJU KOROSI PADA PUMP IMPELLER DI INDUSTRI PERTAMBANGAN BATU BARA
Authors: Nur Rachman Puguh Ogi
Published: March 2017

Korosi merupakan kerusakan material logam yang disebabkan reaksi antara logam dengan lingkungannya yang menghasilkan oksida logam dan sulfida logam atau hasil reaksi lainnya yang lebih dikenal sebagai pengkaratan. Stainless steel merupakan jenis baja yang tahan terhadap korosi karena memiliki unsur paduan minimal 18% chrom (Cr) dan 8% nikel (Ni).Penelitian ini menggunakan tahanan polarisasi dengan menggunakan software 342 Sotcorr Corrosion Meansurement software yang dilengkapi dengan Potensiostat/Galvanostat 273, lalu dilakukan uji foto optik dengan pembesaran 50 kali, untuk mengetahui permukaan spesimen dengan perbesaran struktur pada stainless steel 304 tersebut. Objek penelitian menggunakan stainless steel 304 dengan ukuran spesimen 10 mm sebanyak 3 kali pengujian. Stainless steel AISI 304 mempunyai nilai masa jenis 7,94 gr/cm² dan berat ekuivalen 25,12 gr.Hasil dari metode tahanan polarisasi pada sample pertama didapatkan potensial korosi -336,54 mV dan laju korosi 0,0201 mpy, pada sample kedua potensial korosi -359,25 mV dan laju korosi 0,0266 mpy, selanjutnya pada sample terakhir didapatkan potensial korosi -353 mV dan laju korosi 0,0221 mpy