bluuebunny/crossref_metadata_2025 huggingface dataset:
Wind Turbine Maintenance Cost Reduction by Deep Learning Aided Drone Inspection Analysis
Authors: Shihavuddin ASM , Chen Xiao , Fedorov Vladimir , Andre Brogaard Riis Nicolai , Nymark Christensen Anders , Branner Kim , Bjorholm Dahl Anders , Reinhold Paulsen Rasmus
Published: February 2019

Timely detection of surface damages on wind turbine blades is imperative for minimising downtime and avoiding possible catastrophic structural failures. With recent advances in drone technology, a large number of high-resolution images of wind turbines are routinely acquired and subsequently analysed by experts to identify imminent damages. Automated analysis of these inspection images with the help of machine learning algorithms can reduce the inspection cost, thereby reducing the overall maintenance cost arising from the manual labour involved. In this work, we develop a deep learning based automated damage suggestion system for subsequent analysis of drone inspection images. Experimental results demonstrate that the proposed approach could achieve almost human level precision in terms of suggested damage location and types on wind turbine blades. We further demonstrate that for relatively small training sets advanced data augmentation during deep learning training can better generalise the trained model providing a significant gain in precision.
Data Preprocessing for Evaluation of Recommendation Models in E-Commerce
Authors: Chaudhary Namrata , Roy Chowdhury Drimik
Published: February 2019

E-commerce businesses employ recommender models to assist in identifying a personalized set of products for each visitor. To accurately assess the recommendations’ influence on customer clicks and buys, three target areas—customer behavior, data collection, user-interface —will be explored for possible sources of erroneous data. Varied customer behavior misrepresents the recommendations’ true influence on a customer due to the presence of B2B interactions and outlier customers. Non-parametric statistical procedures for outlier removal are delineated and other strategies are investigated to account for the effect of a large percentage of new customers or high bounce rates. Subsequently, in data collection we identify probable misleading interactions in the raw data, propose a robust method of tracking unique visitors, and accurately attributing the buy influence for combo products. Lastly, user-interface issues discuss the possible problems caused due to the recommendation widget’s positioning on the e-commerce website and the stringent conditions that should be imposed when utilizing data from the product listing page. This collective methodology results in an exact and valid estimation of the customer’s interactions influenced by the recommendation model in the context of standard industry metrics such as Click-through rates, Buy-through rates, and Conversion revenue.
Geostatistics and Digital Social Networks—A Study of Tourism Dynamics in “Alta and University of Coimbra” (UNESCO world Heritage Site)
Authors: Santos José Gomes dos , de Azevedo Liliana Raquel Simões , Patriarca Joaquim António Saraiva , Leitão Luis Carlos Roseiro
Published: February 2019

Spatial modeling in Geographic Information Systems (GIS) always involves choices. The existence of constraints, either of a financial nature or related to the specifics of the software itself, to the algorithms, the uncertainty and even the reliability of the data, the purposes and the applications of the studies, make this a kind of guiding compass for GIS analysts. Building on a previous exercise of data acquisition (check-ins) based on two Digital Social Networks (DSN—Facebook and Foursquare) and on the awareness of the use of voluntary geographic information generated by tourists sharing their topophilic ties through DSN, the present analysis aims to evaluate the contribution of modern techniques of spatial analysis applied to tourism in the “Alta and University of Coimbra” area. Concepts and procedural tasks related to density determination, cluster analysis and identification of patterns associated with regionalized variables have thus been implemented with the purpose of evaluating and comparing the results obtained through the application of two techniques of spatial analysis, Kernel Density Estimation (KDE) and Optimized Hot-Spot Analysis (OHSA) & Inverse Distance Weighting (IDW) Interpolation.
Impact of Intellectual Capital on Firm Value: The Moderating Role of Managerial Ownership
Authors: Ahmed Aftab , Khurshid Muhammad Kashif , Yousaf Muhammad Usman
Published: February 2019

Rapidly changing dynamics of globalization and increasing market competition are causing the companies all around the world confronting several new challenges and opportunities. To be competitive and successful apart from relative importance of physical resources, companies must adapt modern strategies and policies regarding market flexibility and development. The purpose of this study is to empirically investigate the relationship between intellectual capital and firm value. Furthermore, the moderating role of managerial ownership has been evaluated with the help of regression analysis. The sample included the panel data taken from non-financial firms listed on Pakistan stock exchange (PSX) covering the period 2010-2015. A sample of 79 firms out of 384 firms have been selected with the help of systematic sampling technique. VAIC (Value Added Intellectual Coefficient) model has been used for the calculation of intellectual capital. Tobin's Q has been taken as a measure of firm value. Managerial ownership has been tested as moderator. Based on data analysis, it is concluded that the relationship between intellectual capital and firm value is positively significant. It is also concluded that managerial ownership moderates the relationship between intellectual capital and firm value negatively.
Modeling Solid-Phase Microextraction of Volatile Organic Compounds by Porous Coatings Using Finite Element Analysis
Authors: Kenessov Bulat , Derbissalin Miras , Koziel Jacek A. , Kosyakov Dmitry S.
Published: February 2019

Experimental optimization of analytical methods based on solid-phase microextraction (SPME) is a complex and labor-intensive process associated with uncertainties. Using theoretical basics of SPME and finite element analysis software for the optimization proved to be an efficient alternative. In this study, an improved finite element analysis-based model for SPME of volatile organic compounds (VOCs) by porous coatings was developed mainly focussing on the mass transport in coatings. Benzene and the Carboxen/polydimethylsiloxane (Car/PDMS) coating were used as the model VOC and a porous SPME coating, respectively. It has been established that in the coating, volumetric fractions of Carboxen, PDMS, and air are 33, 42 and 25%, respectively. It has been proven that Knudsen diffusion in micropores can slow down a mass transport of analytes in the coating. For Car/PDMS coating, mass transport of benzene is mostly characterized by a molecular diffusion, which can be explained by a large fraction of macro- and mesopores. It has been shown that the developed model can be used to model the extraction of VOCs from air and water samples encountered in a typical SPME development method procedure. It was possible to determine system equilibration times and use them to optimize sample volume and Henry’s law constant. The developed model is relatively simple, fast, and can be recommended for optimization of extraction parameters for other analytes and SPME coatings. The diffusivity of analytes in a coating is an important property needed for improved characterization of existing and new SPME polymers and analytical method optimization.
Effects of Continuous Deep Fat Frying on the Physical and Chemical Properties of Assorted Brands of Edible Cooking Oils Sold in Metropolitan Kampala
Authors: Omara Timothy , Kigenyi Erisa
Published: February 2019

Deep fat frying is not novel, but a classical antiquity culinary technique preferred chiefly for its swiftness, amenity, conferment of a crisp texture, attractive sensorial and organoleptic qualities and thus delectableness of the fries. Regrettably, repeated use of oils for frying impacts the storage life and nutritional suitability of fries. This concerted study investigated the effects of continuous deep frying on physicochemical properties of ten brands of edible cooking oils: Fortune Butto, Roki, Tamu, Best Fry, Golden Fry, Mukwano, Sunny, Sunvita, Sunlite and Sunseed used in Kampala, Uganda. The color value (CV) and the acidification of the oils as free fatty acid (FFA), peroxide value (POV), paraanisidine value (AnV) and iodine adsorption value (IV) before and between ten successive deep-frying using potato chips were determined. The possible reuse of the oils was estimated from the frying round when a quality criterion surpassed the specifications for edible oils. For fresh oils, the mean statistical parameter readings were: CV (0.4R 3.4Y-7.7R 70Y), % FFA (0.0430-0.1508), POV (0.5951-6.6134 meqO2/Kg), AnV (0.90-4.30) and IV (57.62-128.35gI2/100g). By the tenth fry, the values were respectively 3.0R 23Y-20.4R 70Y, 0.2286-0.4817, 11.1138-15.7525 meqO2/Kg, 10.31-22.16 and 53.66-126.03 gI2/100g. Reuse of the oils for continuous frying of potatoes on the same day can be done only up to 7 times on average for hard oils and 6 times for soft oils.
Assessment of Thermal Stresses in Asphalt Mixtures at Low Temperatures Using the Tensile Creep Test and the Bending Beam Creep Test
Authors: Pszczola Marek , Jaczewski Mariusz , Szydlowski Cezary
Published: February 2019

Thermal stresses belong to the leading factors that influence low-temperature cracking behavior of asphalt pavements. During winter, when temperature drops to significantly low values, tensile thermal stresses develop as a result of pavement contraction. Creep test methods can be suitable for the assessment of low-temperature properties of asphalt mixtures. To evaluate the influence of creep test methods on the obtained low-temperature properties of asphalt mixtures, three point bending and uniaxial tensile creep tests were applied and the master curves of stiffness modulus were analyzed. On the basis of creep test results, rheological parameters describing elastic and viscous properties of the asphalt mixtures were determined. Thermal stresses were calculated and compared to tensile strength of the material to obtain the failure temperature of the analyzed asphalt mixtures. It was noted that lower strain values of creep curves were obtained for the Tensile Creep Test (TCT) than for the Bending Beam Creep Test (BBCT), especially at lower temperatures. Results of thermal stress calculations indicated that higher reliability was obtained for the viscoelastic Monismith method based on the TCT results than for the simple quasi-elastic solution of Hills and Brien. The highest agreement with the TSRST results was also obtained for the Monismith method based on the TCT results. No clear relationships were noted between the predicted failure temperature and different methods of thermal stress calculations.
Impact of Conductive Yarns on Embroidery Textile Moisture Sensor
Authors: Martinez-Estrada Marc , Fernandez-Garcia Raul , Gil Ignacio
Published: February 2019

In this work, two embroidered textile moisture sensors are characterized with three different conductive yarns. The sensors are based on a capacitive interdigitated structure embroidered on a cotton substrate with an embroidered conductor yarn. The performance comparison of 3 different type of conductive yarns has been addressed. In order to evaluate the sensor sensitivity, the impedance of the sensor has been measured by means of a LCR meter from 20 Hz to 20 kHz on a climatic chamber with a sweep of the relative humidity from 30% to 65% at 20 ºC. The experimental results show a clear and controllable dependence of the sensor impedance with the relative humidity and the used conductor yarns. This dependence points out the optimum conductive yarn to be used to develop wearable applications for moisture measurement.
Moraxella nonliquefaciens and M. osloensis are Important Moraxella Species that Cause Ocular Infections
Authors: LaCroce Samantha , Wilson Mollie N. , Romanowski John E. , Newman Jeffrey D. , Jhanji Vishal , Shanks Robert M.Q. , Kowalski Regis P.
Published: February 2019

Purpose. Moraxella is an ocular bacterial pathogen isolated in cases of keratitis, conjunctivitis, and endophthalmitis. Gram-negative brick-shaped diplobacilli from ocular specimens, and slow growth in culture, are early indications of Moraxella ocular infection; however, identifying Moraxella to species can be complex and inconsistent. Methods. In this study, bacteria consistent with Moraxella were identified to species using: 1) DNA sequencing coupled with vancomycin susceptibility, 2) MALDI-TOF Mass Spectrometry, and 3) Biolog ID System. Study samples consisted of 9 ATCC Moraxella controls, 82 isolates from keratitis, 21 isolates from conjunctivitis, and 4 isolates from endophthalmitis. Results. The ATCC controls were correctly identified. For keratitis, 66 (80.5%) were identified as M. nonliquefaciens, 7 (9.0%) as M. lacunata, 5 (6%) as M. osloensis, 2 (2.5%) as Acinetobacter lwoffi, 1 (1.0%) as M. bovis/nonliquefaciens, and 1 (1.0%) as M. osloensis/nonliquefaciens. For conjunctivitis, 9 (43.0%) were identified as M. osloensis, 6 (29.0%) as M. nonliquefaciens, 3 (14.3%) as Roseomonas, 2 (9.5%) as Acinetobacter (parvus, junii), and 1 (4.5%) as M. catarrhalis/M. nonliquefaciens. From endophthalmitis, 3 of 4 of the isolates were M. nonliquefaciens. Overall, M. nonliquefaciens and M. osloensis were identified in 70% (75 of 107) and 13% (14 of 107) of cases, respectively, totaling 83% (89 of 107). Conclusions. M. nonliquefaciens and M. osloensis are important bacterial pathogens of the eye as determined by DNA sequencing, MALDI-TOF MS, and Biolog. Although Moraxella catarrhalis is a clinical pathogen, other species of Moraxella appear to have a prominent role in eye infections.
New Conformable Fractional Integral Inequalities of Hermite-Hadamard Type for Convex Functions
Authors: Mohammed Pshtiwan , Dragomir Sever
Published: February 2019

In this work, we establish some new Hermite-Hadamard type inequalities for convex functions via conformable fractional integral. Moreover, we show that through the conformable fractional integral we can find some new Hermite-Hadamard type inequalities for convex functions via the classical integrals.
A New Approach to the Technological Aspect of Corporate Sustainable Development
Authors: Drejeris Rolandas , Ozeliene Danguole
Published: February 2019

Enterprises that seek for sustainable development should align economic interests with environmental and social requirements. It is not enough to take into account just these basics components. Technology plays a significant role in company activity. The aim of this article is to highlight the relationship between the dimensions characterising sustainability and to take a deeper look at the structure of the concept of sustainability so that to understand in more detail the completeness of the dimensions of sustainability. For achieving this aim is necessary through the analysis of researchers’ opinions to apply the logical assessment, systematisation, and comparison of information, selects the most important information describing the sustainability of technology, highlights the relationships between the technological aspect of sustainability and other sustainability dimensions, evaluates the technological processes of the corporate product in terms of sustainability, clarifies and presents arguments highlighting the importance of the technological aspect in sustainable business activity, rejects inappropriate arguments, identifies links between the arguments, and, basing on the information, proves and/or formulates anew some logical considerations to justify the full competency of the technological dimension in the sustainable development framework.
From Entropy Generation to Exergy Efficiency at Varying Reference Environment Temperature: Case Study of an Air Handling Unit
Authors: Streckienė Giedrė , Martinaitis Vytautas , Bielskus Juozas
Published: February 2019

The continuous energy transformation processes in heating, ventilation and air conditioning systems of buildings are responsible for 36% of global final energy consumption. Tighter thermal insulation requirements for buildings have significantly reduced heat transfer losses. Unfortunately, this has little effect on energy demand for ventilation. On the basis of the First and the Second Law of Thermodynamics, the concepts of entropy and exergy are applied to the analysis of ventilation air handling unit (AHU) with a heat pump in this paper. This study aims to develop a consistent approach for this purpose, taking into account the variations of reference temperature and temperatures of working fluids. An analytical investigation on entropy generation and exergy analysis are used, when exergy is determined by calculating coenthalpies and evaluating exergy flows and their directions. The results show that each component of the AHU has its individual character of generated entropy, destroyed exergy and exergy efficiency variation. However, the evaporator of heat pump and fans have unabated quantities of exergy destruction. The exergy efficiency of AHU decreases from 45-55% to 12-15% when outdoor air temperature is within the range of –30°C…+10°C, respectively. This helps to determine conditions and components of improving the exergy efficiency of the AHU at variable real-world local climate conditions. The presented methodological approach could be used in the dynamic modelling software and contribute to a wider application of the Second Law of Thermodynamics in practice.
Fighting Corruption and Enhancing Tax Compliance through Digital Public Services: A Way to Increase Sustainable Development in Romania
Authors: Fanea-Ivanovici Mina , Muşetescu Radu Cristian , Pană Marius Cristian , Voicu Cristina
Published: February 2019

Fighting corruption and enhancing tax compliance through digital public services represent key factors for increasing sustainable development in Romania. Tax regulations affect the level of tax compliance as a consequence of the fact that it produces additional costs. The discussion is based on the consideration of the costs generated by compliant behavior and we explain how such costs influence the entrepreneurs’ decision in the fiscal environment. Do entrepreneurs decide to comply or do they choose to take evasive initiatives? How does corruption influence the level of sustainable development? How does digitization influence the level of tax compliance? How do entrepreneurs decide to comply by using digital public services? Among the numerous tools developed to fight corruption, the use of communication technologies has recently been researched and there is still need for further research in the Romanian economic environment. We depart from the premise that no developing country is yet fully ready to embrace a comprehensive program of eGovernment and plead for a plan to increase sustainable development in Romania through digital public services, thus fighting corruption and enhancing tax compliance.
What Differentiates Poor and Good Outcome Psychotherapy? A Statistical-Mechanics-Inspired Approach to Psychotherapy Research
Authors: De Felice Giulio , Orsucci Franco , Scozzari Andrea , Gelo Omar , Serafini Gabriele , Andreassi Silvia , Vegni Nicoletta , Paoloni Giulia , Lagetto Gloria , Mergenthaler Erhard , Giuliani Alessandro
Published: February 2019

Statistical mechanics investigates how emergent properties of macroscopic systems (such as temperature and pressure) relate to microscopic state fluctuations. The underlying idea is that global statistical descriptors of order and variability can monitor the relevant dynamics of the whole system at hand. Here we test the possibility of extending such an approach to psychotherapy research investigating the possibility of predicting the outcome of psychotherapy on the sole basis of coarse-grained empirical macro-parameters. Four good-outcome and four poor-outcome brief psychotherapies were recorded, and their transcripts coded in terms of standard psychological categories (abstract, positive emotional and negative emotional language pertaining to patient and therapist). Each patient-therapist interaction is considered as a discrete multivariate time series made of subsequent word-blocks of 150-word length, defined in terms of the above categories. Static analysis (Principal Component Analysis) highlighted a substantial difference between good-outcome and poor-outcome cases in terms of mutual correlations among those descriptors. In the former, the patient’s use of abstract language correlated with therapist’s emotional negative language, while in the latter it co-varied with therapist’s emotional positive language, thus showing the different judgment of the therapists regarding the same variable (abstract language) in poor and good outcome cases. On the other hand, the dynamic analysis, based on five coarse-grained descriptors related to variability, degree of order and complexity of the series, demonstrated a relevant case-specific effect, pointing to the possibility of deriving a consistent picture of any single psychotherapeutic process. Overall, the results showed that the systemic approach to psychotherapy (an old tenet of psychology) is mature to shift from a metaphorical to a fully quantitative status.
Incidence of Epilepsy and Evaluation of Associated Disorders in Elderly People of Amirkola, North of Iran
Authors: Saadat Payam , Alijan AhmadiAhangar , Hosseini Seyed Reza , Bijani Ali , Khalili Mohsen , Alijanpour Shayan
Published: February 2019

Introduction: The aim of this study was to determine the incidence of epilepsy in the elderly and investigating the disorders associated with its occurrence. Methods and Materials: This cross-sectional study using a census sampling method, is a part of a comprehensive and cohort research of "Amirkola Health and Ageing Project". Cognitive impairment using Mini Mental State Examination (M.M.S.E). and psychiatric diseases based on relevant tests such as Geriatric Depression Scale G.D.S. Physical activity was measured based on the standard physical activity questionnaire for elderly Physical Activity Scale for Elderly(PASE). All data were analyzed using chi-square test and logistic regression in SPSS v23 software. Results: Of 1482 participants 35 subjects were epileptic. the incidence was 2.36 in 1,000 of the elderly. Significant association between Parkinson’s Disease(p=0.001), falls (p=0.001, depression(p=0.001), hyperphosphoremia(p= 0.039) and hypokalaemia (p= 0.031) concluded with epilepsy. Past history of stroke and serum (triglyceride,LDL) level in epileptic were more than the no epileptics. Conclusion: significant association between Parkinson's Disease, frequency of fall, depression and correlation of history of stroke, increased serum triglyceride level and higher serum level of LDL with epilepsy concluded.
DNA Methylation Silencing of microRNA Gene Methylater in the Precancerous Background Mucosa with and without Gastric Cancer: Analysis of Effects of Helicobacter pylori Eradication and Long-Term Aspirin Use
Authors: Watari Jiro , Ito Chiyomi , Shimoda Tadakazu , Tomita Toshihiko , Oshima Tadayuki , Fukui Hirokazu , Das Kiron , Miwa Hiroto
Published: February 2019

The risk of gastric cancer (GC) declines after Helicobacter pylori (H. pylori) eradication and long-term aspirin use. We evaluated the effects of H. pylori eradication (Cohort 1) and aspirin use (Cohort 2) on the methylation of microRNAs (miRNAs) such as miR-34c, miR-124a-3, miR-129-2, and miR-137 in the gastric mucosa with and without GC, i.e., atrophic mucosa (AM) and intestinal metaplasia (IM). DNA was isolated from AM and IM separately using laser caption microdissection. In Cohort 1, H. pylori eradication was associated with a significant reduction of miR-124a-3 methylation only in AM, but not in IM. miR-129-2 methylation in AM may be a surrogate marker of GC in H. pylori-infected patients. In Cohort 2, aspirin did not reverse miRNA methylation in either AM or IM irrespective of H. pylori infection. miR-129-2 methylation in AM was an independent predictive marker of GC in H. pylori-infected but not -eradicated patients. These results indicate that H. pylori eradication and aspirin use were less effective in improving methylation in IM compared with AM; thus, these interventions are recommended at an early stage prior to the development of IM to prevent GC development.
Percutaneous Needle Fasciotomy for Dupuytren Contracture
Authors: Strömberg Joakim
Published: February 2019

Background:

Percutaneous needle fasciotomy (PNF) is a minimally invasive treatment option for mild to moderate Dupuytren contractures in the metacarpophalangeal (MCP) and proximal interphalangeal (PIP) joints, and the procedure requires limited resources. Multiple contractures can be treated during the same session, and the treatment is considerably easier for the patient and requires a minimum of rehabilitation compared with limited fasciectomy
1
.

Description:

PNF can be performed in a regular outpatient clinic in most cases. With the patient in a reclined position, the cord of the contracted joint is tensioned by passive extension and is divided percutaneously with a 25-gauge needle under local anesthesia. The immediate treatment effect in terms of reduction of the contracture is readily assessed, and PNF can be performed at additional levels if needed.

Alternatives:

Collagenase Clostridium histolyticum (CCH; Xiaflex).

Total or partial fasciectomy.

Dermofasciectomy.

Amputation (in severe cases after multiple other procedures).

Rationale:

Local treatment with injection of CCH (Xiaflex) in the Dupuytren cord enables rupture of the cord similar to that after PNF
2
. Both CCH and PNF are minimally invasive treatments with obvious advantages compared with open surgery
3
, and they seem to have the same intermediate-term outcome
4–6
. However, CCH treatment is considerably more expensive than PNF and requires 2 visits by the patient to the outpatient clinic instead of 1
7
. CCH has also been reported to have more complications than PNF
2,8
. Furthermore, multiple (>4) joint contractures
9
can be treated by PNF at the same time. In the author’s experience, even bilateral contractures can be treated at the same session if requested by the patient. As the number of patients treated with CCH and PNF has increased, there has been a corresponding decrease in more invasive procedures
10
; however, open surgery will probably always remain an option in more severe cases or as a secondary procedure after recurrence.
The Similarity and Exemplarity of Things in the Logos, according to Thomas Aquinas
Authors: SOTO-BRUNA María Jesús
Published: February 2019

This article focuses on the fourth question of Thomas Aquinas’ De veritate in order to analyse the ontological status of things in the divine Logos, or Word. To do this, and following Aquinas’ text, it first examines the analogy between the mental word and the divine word, explaining the meaning of exemplarity. It then traces the cognitive process which leads to intellectual conception. Finally, in a comprehensive manner, it examines issues surrounding the way of knowing a thing according to similitude and exemplarity in the divine Logos.
The Place of Sense Perception in Thirteenth-Century Encyclopaedias
Authors: ORTÚZAR ESCUDERO María José
Published: February 2019

Several studies have approached sense perception in the encyclopaedias of Thomas of Cantimpré, Bartholomew the Englishman and Vincent of Beauvais. Yet a systematic overview and comparison of the arrangement of sense perception in these encyclopaedias is still lacking. The overview offered here shows that all encyclopaedias place sense perception beside expositions on psychology and anatomy. There are, however, significant differences in how they treat the objects of sensation. In the case of Bartholomew and Vincent, I argue, these differences reflect two different readings of Aristotle.
The Etica in volgare Attributed to Taddeo Alderotti in an Italian Manuscript of Marquis of Santillana’s Library
Authors: CUENCA I ALMENAR Salvador
Published: February 2019

The paper analyses the material features of the MSS/ BNE 10124 in order to refute the theory that it belonged to King Alfonso X. It also studies three excerpts of the second text of the manuscript to prove that it contains the Etica in volgare attributed to Taddeo Alderotti, not the Italian translation of Brunetto Latini’s Tresor.
El uso de la historia trinacional como herramienta de integración transfronteriza peruano-chileno-boliviana
Authors: Chaupis Torres José
Published: February 2019

La investigación busca ahondar en la agenda integracionista propuesta en Buenos Aires en 2015, a partir de tres aspectos: la historia, la escuela y la memoria. La resignificaciónde la historia con perspectiva trinacional nos permitirá avanzar hacia una región sudamericana más integrada. Una desprejuiciada enseñanza de la historia en las escuelasse convertiría en una potente herramienta para fomentar una cultura para la paz. Finalmente, una adecuada reconciliación con la memoria histórica permitirá desde un planosimbólico superar el pasado de conflicto. En una primera parte se analizará la función que cumple la resignificación de la historia común articulándola con la forma en que seenseña trinacionalmente la historia en los colegios. En una segunda parte se comprenderá la necesaria superación del conflicto con la memoria histórica concentrada en la Guerra del Pacífico hacia una adecuada reconciliación trinacional transfronteriza.
Cuadernos urgentes, Julián Pérez Huarancca
Authors: Paul Espinoza Jean
Published: February 2019

Desde su título, Cuadernos urgentes traduce con exactitud el ánimo que impulsa a sus editores: una necesidad apremiante por difundir investigaciones en torno a la obra de escritores peruanos relevantes, a menudo soslayados injustamente. Para ello, ofrece una selección de ensayos que pretenden establecer líneas de interpretación con el interés de indagar enla complejidad de sus poéticas. En su primer número, dedicado a Augusto Higa Oshiro, el objetivo fue cumplido acertadamente, aunque con ciertos reparos ineludibles en todo proyecto académico. En esta actual entrega, del mismo modo, presenta alcances valiosos, pero también otras características indispensables de escudriñar para iniciar una lectura crítica.
Sweep Efficiency of Surfactant Flooding Processes
Authors: Davis John A.
Published: February 2019

JPT Forum articles are limited to 1,500 words including 250 words for each table and figure, or a maximum of two pages in JPT. A Forum article may present preliminary results or conclusions of an investigation that the present preliminary results or conclusions of an investigation that the author wishes to publish before completing a full study; it may impart general technical information that does not warrant publication as a full-length paper. All Forum articles are subject to approval by an editorial committee.

The recent National Petroleum Council study1 of the potential for enhanced oil recovery estimates possible reserve additions through application of emerging technology. In analyzing the potential for surfactant processes, the NPC study assumes that volumetric sweep efficiencies for such processes would be no higher than those obtained from a prior waterflood. This assumption considers the only oil available for tertiary recovery to be the residual waterflood oil in the swept zones. Zones of higher oil saturation thus are eliminated.

Since many surfactant flooding processes utilize a viscous slug followed by a polymer solution, one might anticipate that such processes could yield higher volumetric sweep efficiencies. An analysis of produced chlorides from a Maraflood™ oil recovery process test in the Bradford Third sand of Pennsylvania supports· this position. Danielson et al.2 have reported previously on this test.

The Bingham project was carried out on a 4 7 -acre tract in the Bradford field, McKean County, Pa., allowing a unique opportunity to estimate increased sweep efficiency from an analysis of produced chlorides. This is possible for two reasons. First, the connate water contained a high chloride ion concentration (150,000 ppm), while all injected flood water was fresh (150 ppm chloride or less). No produced water was recycled during waterflood operations, thus avoiding what would otherwise be a serious complication in the analysis of produced chlorides. Second, the same wells and patterns were used for this surfactant, or micellar flood, as were used for the waterflood, eliminating the possibility of increased volumetric conformance because of pattern changes.
Efficient and High-Quality RNA Isolation from Metabolite-Rich Tissues of Stevia rebaudiana, an Important Commercial Crop
Authors: Tan Yoeng Leh  , Christina Seok Yien Yong  , Rosimah Nulit  , Janna Ong Abdullah
Published: February 2019

Stevia rebaudiana, a perennial herb native to northeastern Paraguay, has gained immense attention globally over the recent decades due to the natural sweetness of its leaves. Like in most plants, this particular species contains high amount of secondary metabolites, thus rendering the isolation of high quality and quantity RNA extract for molecular applications rather challenging. An effective, high-yield and high-quality RNA isolation protocol for this economically important plant species was devised here based on the cetyltrimethylammonium bromide (CTAB) extraction method, with an additional genomic DNA (gDNA) removal step. DNA and other contaminants that may affect downstream applications were effectively removed. Our results exhibited that RNA samples isolated from the leaves and stems of Stevia rebaudiana using this improvised method are high in integrity and quality with RNA integrity number (RIN) of more than 8 and low in contaminants.

 

Kajian ini melaporkan biodiversiti strain bakteria selulosa termofilik yang terdapaStevia rebaudiana, satu tumbuhan herba saka yang berasal dari timur laut Paraguay, telah mendapat perhatian yang banyak untuk beberapa dekad kebelakangan ini kerana kemanisan semula jadi daun-daunnya. Seperti kebanyakan tumbuhan, spesies ini mengandungi kandungan metabolit sekunder yang tinggi, dengan itu menyebabkan pengasingan RNA yang berkualiti dan berkuantiti tinggi untuk aplikasi-aplikasi hiliran menjadi agak mencabar. Sebuah protokol pengasingan RNA yang efektif, dapat memberikan hasil yang banyak dan berkualiti tinggi telah dirumuskan berdasarkan kaedah pengekstrakan setiltrimetilamonium bromida (CTAB), dengan penambahan langkah pembuangan DNA genom (gDNA). DNA dan bahan kontaminasi lain yang berkemungkinan mempengaruhi aplikasi hiliran juga disingkirkan secara efektif. Hasil kajian ini menunjukkan bahawa sampelsampel RNA yang diasingkan daripada daun-daun dan batang-batang Stevia rebaudiana menggunakan kaedah yang direka ubah ini adalah dalam kualiti dan integriti yang tinggi dengan nombor integriti RNA (RIN) yang melebihi 8 dan tahap pencemaran yang rendah.
The Analysis of Factors Affecting the Buying Interest of E-Commerce Customers
Authors: Harisno Harisno , Herby Deborah
Published: February 2019

The goals of this research are to analyze factors affecting buying interest of e-commerce customers residing in the areas of Jakarta, Bogor, Depok, Tangerang, and Bekasi in Indonesia. A questionnaire is developed as the data acquisition instrument and is pretested by 30 respondents. The pretest is intended to evaluate the validity and reliability of the instrument. For the research, the data are collected from a random sample of 200 respondents. The research variables are ease of use, enjoyment, shopping experience, trust, promotion/advertising, and price. A structural equation model is established to assess the relations between the interested variables. As the results, the analysis shows that the factors of ease of use, promotion/advertising, and price significantly influence the buying interest. Meanwhile, the enjoyment, shopping experience, and trust do not affect the buying interest.
Redefining Banyumas Local Values: Symbolisms in Batik Motifs
Authors: Purwaningsih Dyah Raina , Sholikhah Ika Maratus , Wardani Erna
Published: February 2019

This research aimed to find the types of signs using Peircean semiotic theory namely icon, index, and symbol in Banyumas batik motifs. The researchers were going to describe the Banyumas local values depicted in each of the batik motifs. Moreover, Banyumas local values were reflected from the explained batik motifs. This research was a descriptive qualitative research by applying embedded-case study. The research was limited on Banyumas batik motifs which contained natural symbols; they were Jahe Rajang, Lumbon, Babon Angrem, Peksi Gowok, and Serayuan. There were two types of data to be analyzed, namely primary and secondary data. There were two key informants that the researchers met and interviewed to obtain more reliable data. To gain the primary data, the researchers conducted some series of interview with the first informant, a Banyumas batik artisan who was very dedicated to maintain the existence of batik tulis (hand-painted batik). Meanwhile, to gain the secondary data, the researchers visited a Banyumas culture activist. The results show that Banyumas batik motifs are made with certain purposes and meanings. Each of the motifs analyzed in this research carries important signs. It reflects the values and beliefs adhered by the local people. Through these motifs and the appreciation of batik, Banyumas local value like Cablaka (straightforward, honest, and genuine) reflects the index as one type of sign.
Managing the trade-off between economic growth and protection of environmental quality: the case of taxing water pollution in the Olifants river basin of South Africa
Authors: Kyei Clement , Hassan Rashid
Published: February 2019

A series of pollution control measures have been introduced to protect water quality in the Olifants river basin, the third most water-stressed and most polluted basin in South Africa. This paper employed an environmentally extended computable general equilibrium (CGE) model to analyse the economic and environmental implications of a tax on water pollution in the basin. Implications of increasing the pollution tax rate currently in place for the levels of economic activities and water quality have been simulated under alternative tax revenue recycling schemes. Results of our policy simulations suggest that internalising the cost of water pollution through the tax regime achieves its environmental goals of protecting the aquatic ecosystem, by shifting production away from pollution-intensive sectors. This, however, comes at some cost to the regional economy of the basin. Recycling the tax revenue through income transfers to households or a subsidy to pollution abatement mitigates the adverse economic impacts.
Detection of extraneous water ingress into the sewer system using tandem methods – a case study in Trondheim city
Authors: Beheshti M. , Sægrov S.
Published: February 2019

Infiltration and inflow (I/I) of extraneous water in separate sewer systems are serious concerns in urban water management for their environmental, social and economic consequences. Effective reduction of I/I requires knowing where excess water ingress and illicit connections are located. The present study focuses on I/I detection in the foul sewer network of a catchment in Trondheim, Norway, during a period without snowmelt or groundwater infiltration. Fiber-optic distributed temperature sensing (DTS) was used for the first time in Norway to detect I/I sources in tandem with closed-circuit television inspection (CCTV) and smoke testing. DTS was an accurate and feasible method for I/I detection, though it cannot identify exact types of failure and sources of I/I. Therefore, other complementary methods must be used, e.g. CCTV or smoke testing. However, CCTV was not completely useful in confirming the DTS results. This study provides practical insights for the rehabilitation and repair of sewer networks that suffer from the undesirable I/I of extraneous water.
Clinical Predictors of Diabetic Retinopathy Progression; A Systematic Review
Authors: Ghamdi Abdul Hamid Al
Published: February 2019

Objective:

This study was conducted to discuss the clinical value of published Diabetic Retinopathy
Progression determinants.

Methods:

The data for systematic review was collected from the published studies through PubMed and
Medline. These studies discussed the clinical predictors of Diabetic Retinopathy (DR) progression. The
common keywords used were diabetic Retinopathy, diabetes mellitus, systolic blood pressure, hemoglobin,
and albuminuria.

Results:

Diabetic Retinopathy is one of the common causes of irreversible visual impairment among
adults. Poor glycemic control, systemic hypertension, diabetes duration, dyslipidemia, and microalbuminuria
are the major risk factors for the development and progression of diabetic retinopathy. Recently,
increased aortic stiffness has been identified as a prognostic marker of diabetic retinopathy and
peripheral neuropathy.

Conclusion:

Certain groups of diabetic individuals are at higher risk to have progressive diabetic retinopathy
and eventually visual impairment. Clinical determinants and predictors are considered as prognostic
markers and could help physicians to develop an effective risk-based screening program for this
condition.
Extrusion of cement-based materials - an overview
Authors: Perrot Arnaud , Rangeard Damien , Nerella Venkatesh Naidu , Mechtcherine Viktor
Published: February 2019

Extrusion is a process that consists in forcing a formable material to pass through a die having the cross-section of the part to be obtained. This way of processing is used with conventional and fibre-reinforced cement-based materials to fabricate various construction elements such as panels, pipes and roadside curbs. Recently, with the development of digital fabrication methods and especially 3D concrete printing by selective deposition, the extrusion techniques have experienced a significant increase in interest.

This letter describes the screw and ram extrusion techniques and their applications in construction industry. Furthermore, the underlying mechanisms involved during extrusion flow are delineated and the roles of rheological and hydro-mechanical behaviours (the latter one in a soil mechanics sense) in defining the extrudability – ability of being extruded – of the cementitious materials are highlighted. Finally, specific points such as flow-induced anisotropy of fibre reinforced cementitious materials or surface defects are addressed.
PENGARUH JENJANG PENDIDIKAN, PELATIHAN, DAN PENGALAMAN MENGAJAR TERHADAP PROFESIONALISME GURU SMA MUHAMMADIYAH DI KABUPATEN KEBUMEN
Authors: Eliyanto Eliyanto , Wibowo Udik Budi
Published: February 2019

Penelitian ini bertujuan untuk mengetahui hubungan jenjang pendidikan, pelatihan, dan pengalaman mengajar dengan profesionalisme guru SMA Muhammadiyah di Kabupa-ten Kebumen. Penelitian ini merupakan penelitian kuantitatif korelasional. Populasi dalam penelitian ini adalah seluruh guru SMA Muhammadiyah se-Kabupaten Kebumen, yang berjumlah 54 orang, sedangkan sampel penelitian adalah sejumlah 44 orang. Pengumpulan data meng-gunakan angket, dan analisis data menggunakan teknik analisis korelasi Pearson product moment dan analisis regresi ganda.  Penelitian ini menghasilkan kesimpulan bahwa jenjang pendidikan dan pelatihan masing-masing memiliki pengaruh yang tidak signifikan terha-dap profesionalisme guru. Sedangkan pengalaman mengajar memiliki pengaruh yang posi-tif dan signifikan terhadap profesionalisme guru. Selanjutnya jenjang pendidikan, pelatihan, dan pengalaman mengajar secara bersama-sama memiliki pengaruh yang tidak signifikan terhadap profesionalisme guru. Kata kunci: jenjang pendidikan, pelatihan, pengalaman mengajar, dan profesionalisme
IMPLEMENTASI PERAN KOMITE SEKOLAH DI SD NEGERI SUMBERPORONG 03 KECAMATAN LAWANG, KABUPATEN MALANG
Authors: Kriswantono Mawan , Muhyadi Muhyadi
Published: February 2019

Penelitian ini bertujuan untuk mendeskripsikan peran komite sekolah sebagai: 1) ba-dan pertimbangan, 2) badan pendukung, 3) badan pengontrol, dan  4) badan penghubung di SD Negeri Sumberporong 03 Lawang, Kabupaten Malang. Penelitian ini menggunakan pendekatan kualitatif. Data diperoleh melalui wawancara dan dokumentasi dari ketua dan anggota komite sekolah, kepala sekolah, dan guru. Analisis data menggunakan analisis interaktif dengan mendasarkan pada proses reduksi data, penyajian data, dan penarikan kesimpulan. Pengujian validitas data menggunakan triangulasi. Hasil penelitian ini menunjukkan bahwa komite sekolah di SD Negeri Sumberporong 03 Lawang, Kabupaten Malang secara umum telah melaksanakan perannya sebagaimana yang diharapkan. Komite sekolah telah melaksanakan perannya sebagai badan pertimbangan, pendukung, dan penghubung. Namun dalam hal pengontrol kebijakan dan program sekolah, komite sekolah belum sepenuhnya melaksanakannya, karena komite sekolah sebagai organisasi yang bersifat sosial dan masing-masing anggota komite mempunyai kesibukan dalam profesi masing-masing sehingga belum mampu melaksanakan kontrol secara langsung di sekolah.Kata kunci: peran, komite sekolah
EVALUASI PROGRAM RINTISAN SEKOLAH BERTARAF INTERNASIONAL SMP NEGERI 3 PURWOREJO
Authors: Suharsono Suharsono , Supriyadi Edy
Published: February 2019

Penelitian ini bertujuan untuk mengungkapkan tingkat keberhasilan pelaksanaan Rintisan Sekolah Bertaraf Internasional (RSBI) di SMP Negeri 3 Purworejo. Penelitian evaluasi ini menggunakan model Contex Input Process Product (CIPP). Subjek penelitian meliputi: kepala sekolah, wakil kepala sekolah, urusan kurikulum, koordinator RSBI, semua guru mata pelajaran, pustakawan, laboran, staf tata usaha, dan representasi peserta didik. Objek penelitian ini berkenaan dengan dimensi Standar Nasional Pendidikan (SNP) dan dimensi Standar Mutu Bertaraf Internasional (RSBI), yang meliputi: 1) variabel konteks; 2) variabel input (Standar Isi, Standar Pendidik dan Tenaga Kependidikan, Standar Sarana dan Standar Pembiayaan); 3) variabel proses (Standar Proses, Standar Pengelolaan, dan Standar Penilaian); 4) variabel produk (Standar Kompetensi Lulusan). Data dikumpulkan melalui angket dan kajian dokumen dan dianalisis menggunakan teknik analisis deskriptif kuantitatif dan kualitatif. Hasil penelitian menunjukkan bahwa tingkat keberhasilan pelaksanaan RSBI di SMPN 3 Purworejo untuk setiap variabel adalah sebagai berikut: 1) Konteks rerata 81,16% termasuk kategori baik. 2) Input, untuk SNP baik (82,13%) untuk RSBI cukup (66,56%): a) Standar Isi, untuk SNP baik (84,88%) untuk RSBI cukup (72,92%); b) Standar Pendidik dan Tenaga Kependidikan, untuk SNP cukup (70,54%) untuk RSBI kurang (55,32%); c) Standar Sarana dan Prasarana, untuk SNP sangat baik (92,34%) untuk RSBI baik (83,62%); d) Standar Pembiayaan, untuk SNP sangat baik (87,50%) untuk RSBI cukup (65,08%). 3) Variabel Proses, untuk SNP sangat baik (89,18%) untuk RSBI baik (77,24%): a) Standar Proses, untuk SNP baik (82,72%) untuk RSBI cukup (73,10%); b) Standar Pengelolaan, untuk SNP sangat baik (90,95%) untuk RSBI baik (81,00%); c) Standar Penilaian, untuk SNP sangat baik (93,99%) untuk RSBI baik (76,29%). 4) Variabel Produk: Standar Kompetensi Lulusan, untuk SNP baik (79,69%) untuk RSBI baik (80,37%). Secara umum tingkat keberhasilan pelaksanaan RSBI di SMP Negeri 3 Purworejo, untuk dimensi SNP termasuk kategori baik (84,24%). Dimensi RSBI termasuk kategori cukup (73,44%).Kata kunci: evaluasi program, RSBI