bluuebunny/crossref_metadata_2025_split huggingface dataset:
Arthrodesis of the Carpometacarpal Thumb Joint for Osteoarthritis; Long-Term Results Using Patient-Reported Outcome Measurements
Authors: van Laarhoven Cecile M.C.A. , Schrier Verena J.M.M. , van Heijl Mark , Schuurman Arnold H. 
Published: August 2019

Abstract
Background Results following carpometacarpal (CMC) arthrodesis of the thumb for osteoarthritis vary widely in literature. Data on long-term patient-reported outcome measurements (PROMs) after thumb CMC joint arthrodesis for osteoarthritis are scarce.
Purpose We report the long-term outcomes of PROMs (function, pain, and satisfaction) after arthrodesis of the thumb CMC joint. We evaluated the correlation of function and pain with patient satisfaction.
Methods Long-term PROMs after thumb CMC arthrodesis for osteoarthritis were evaluated using a retrospective cohort (1996–2015). Three different PROM questionnaires (Disabilities of the Arm, Shoulder, and Hand Questionnaire, Dutch Language version [DASH-DLV], the Patient-Related Wrist and Hand Questionnaire Dutch Language version [PRWHE-DLV], and a questionnaire concerning satisfaction) were sent to all patients.
Results Twenty-five arthrodeses (21 patients) were available for long-term follow-up. The median follow-up time was 10.8 years (interquartile range [IQR]: 9.7–13.0). The median DASH score was 29.2 (IQR: 14.4–38.3), median PRWHE score was 25.0 (IQR: 12.5–44.3). The median satisfaction after the operation and satisfaction with outcome of the operation was 10 for both (on a Likert's scale with 1 worse and 10 excellent satisfaction). There was a statistically significant correlation between the PRWHE total score and PRWHE pain score and satisfaction with surgery and satisfaction with the result. There was no correlation between PRWHE function score and satisfaction or DASH and satisfaction. Results after hardware removal showed no significant differences compared with patients without hardware removal.
Conclusion Patients who underwent arthrodesis for thumb CMC osteoarthritis showed high satisfaction at long-term follow-up, despite moderate results as measured using the DASH and PRWHE. The PRWHE total and PRWHE pain scores correlated significantly with satisfaction with surgery and satisfaction with the result, respectively, whereas no correlation was observed with the PRWHE function score or DASH and satisfaction. This therapeutic study reflects level of evidence IV.
Young people and land in Zimbabwe: livelihood challenges after land reform
Authors: Scoones Ian , Mavedzenge Blasio , Murimbarimba Felix 
Published: August 2019

ABSTRACTThis article explores the livelihood challenges and opportunities of young people following Zimbabwe's land reform in 2000. The article explores the life courses of a cohort of men and women, all children of land reform settlers, in two contrasting smallholder land reform sites. Major challenges to social reproduction are highlighted, reflected in an extended ‘waithood’, while some opportunities for accumulation are observed, notably in intensive agricultural production and agriculture-linked business enterprises. In conclusion, the implications of generational transfer of land, assets and livelihood opportunities are discussed in the context of Zimbabwe's agrarian reform.
The students’ metacognition analysis through jumping task based on lesson study for learning community
Authors: Saiful  , Susanto  , Hobri  
Published: August 2019

Abstract
This research aimed to analyze the students’ metacognition through jumping task based on lesson study for the learning community. This research is qualitative descriptive research. Data collection was done by observation, tests, interviews, think aloud and documentation. The test was given to students when an open class in class VIII of MTs Miftahul Hidayah. From the test results, students were grouped into three based on their level of ability. Two students were selected from each group to be interviewed and deepened through thinking aloud technique. Two students were selected from each group to be interviewed and deepened through thinking aloud technique. Data analysis is in the form of data induction and reduction theory. The results showed that students who had good metacognitive knowledge skills became effective and efficient when they were applying metacognitive control skills. Hence, the students who had poor metacognitive knowledge skills, they experienced difficulties when they were applying metacognitive control skills. The contribution of jumping tasks based on lesson study for learning community is very helpful in enhancing students’ metacognition abilities and skills to individually, in groups and classically.
The profile of student’s anxiety in solving the critical thinking problem on geometry according to Van Hiele theory
Authors: Ayu Cahyaningtyas Brenda , Sunardi  , Yuliati Nanik , Kusuma Dewi Arisna , Nikmatur Rohmah Fitriana 
Published: August 2019

Abstract
This research aimed at describing the students’ anxiety profile in solving the critical thinking problem on geometry according to Van Hiele theory. This research used descriptive type of research with qualitative approach. The methods used were test, observation and interview methods. The subjects were selected by using Van Hiele test. Van Hiele test was given to 100 students. Therefore, it obtained three levels that were the students of visualization level as much as 47%, the students of analysis level as much as 23% and the students of informal deduction level as much as 20%. The results of the critical thinking test on geometry revealed that the students of visualization level fulfilled the focus and inference indicators only while the anxiety on geometry found in the indicators of tensed-face, confusion, forgetful, poor concentration, anxiety and worry. The students of analysis level fulfilled the indicators of focus, reason, inference, situation and overview only while the anxiety on geometry found in the indicators of tensed-face, forgetful, anxiety and worry. Whereas, the students of informal deduction level reached all of the criteria of critical thinking while the anxiety on geometry found in the indicators of confusion, anxiety, impatient and easily disturbed.
The effectiveness of learning cycle with lesson study for learning community to build students creative thinking skills on algebraic form
Authors: Supriyanto  , Hobri  , Susanto  , Sahnawi  , Ursulasari Yuan 
Published: August 2019

Abstract
This research aims to describe the effectiveness of the learning cycle model (LC-5E) with Lesson Study for Learning Community (LSLC) to build students creative thinking skills in algebraic forms. The research procedures Consists of three stages: preparation of learning instruments, validation and revision, and the implementation of research. Data collection using Triangulation methods and creative thinking tests is based on The Torrance Test of Creative Thinking (TTCT). The data analysis shows that: the implementation of the lesson plan is very good category; the frequency of student activity that stands out is collaborative learning with positive responses to learning models; classical completeness of students algebraic ability are increase, creative thinking indicators achieved are fluency and flexibility, the not creative and less creative students are decrease, and the creative and very creative students are increase accompanied by growing collaborative learning and jumping task. Based on the results of data analysis, it was concluded that the implementation research is effective.
Contribution of a categorical statistical test in examining dependencies among qualitative variables by means simplification of correspondence analysis
Authors: Ginanjar I , Nurhuda I , Sunengsih N , Sudartianto  
Published: August 2019

Abstract
The contribution statistical test of categories to dependencies between qualitative variables is needed, because the existence of these categories will influence decision making. Decisions taken can be misleading, if a category does not contribute. If N is the matrix from 2×J or I×2 contingency table which is constructed from two qualitative variables, then the principal coordinates can be calculated using the simplification of correspondence analysis (SoCA). Principal coordinates produced by the SoCA are the same as conventional correspondence analysis (CA), but the SoCA presents a simpler calculation, because it is calculated directly from the elements of N. Principal coordinates derived from 2×J matrix N can be used to test the contribution of categories to dependencies between qualitative variables more simply, and obtained confidence intervals for each category.
Ethnomatematics : how does cigugur traditional community use palintangan on farming
Authors: Umbara Uba , Wahyudin  , Prabawanto Sufyani 
Published: August 2019

Abstract
This study discusses the way of Cigugur traditional community in Indonesia doing their calculating on farming. By using realist ethnography, this study reports objectively the information that collected from participant in the Cigugur traditional communitythrough observation, interviews, documentation, and field notes. The findings from this study show that the farming system carried out by the community used formal mathematics principles. The hari cycle and pasaran cycle in Sundanese are as the same as the concept of relations and functions in mathematics. The function in question is injective function. The results of the relations between day “hari” and “pasaran” can be expressed in an order pair to pair. To determine a finest day, the mathematical concepts used by the Cigugur traditional community are the concepts of addition and the concept of comparison. The sum concept is used to add the values of each day to the value of each pasaran. Meanwhile, the concept of comparison is used to compare the value of the sum results with the criteria for determining the finest day for tandur. Ethnomatematics provides different perspectives regarding mathematical conceptuality.
Spatial Data Panel Analysis for Poverty in East Java Province 2012-2017
Authors: Yolanda A M , Yunitaningtyas K , Indahwati  
Published: August 2019

AbstractPoverty is a phenomenon of spatial heterogeneity, which is usually indicated by the tendency of poor people to group in a certain area. It means that poverty is influenced by the spatial effect. Geographical conditions and economic inequality that occurred in various regions in Indonesia, especially East Java reinforced the reason for adding spatial effects in the analysis. In addition, as an effort to obtain an increasingly accurate model, poverty that occurs is highlighted in a period of time. The aim of this study is to determine the factors that influence the percentage of poor people according to regency/city in East Java province in 2012-2017 by a spatial data panel analysis. The best model for this case is Spatial Autoregressive (SAR) model using the concept of distance. It shows that poverty in East Java is related to spatial effect. Therefore, each regency/city has different constants, depending on its spatial weighting matrix. Thus, the percentage of poor people by Regency/City in East Java province was influenced by Human Development Index (HDI), Poverty Gap Index (P1), Poverty Severity Index (P2) and also the spatial effect.
FEM-based assessment of wear of stamping die
Authors: Trzepiecinski T , Lemu H G 
Published: August 2019

Abstract
In sheet metal forming industry, surface damage and wear such as adhesion and ploughing of metallic sheet, is a well-known problem which reduces the tool life and quality of drawn elements. Surface defects are the consequences of wear and they accelerate the galling process. The knowledge of places particularly endanger wear allows appropriate design of tools. In this paper, an investigation that focused on the finite element-based analysis of wear of stamping tool for forming an axisymmetric drawpiece has been reported. The analyses were carried out for deep-drawing quality steel sheet with a sheet thickness of 2 mm. The basic mechanical parameters of the sheet tested are determined in uniaxial tensile tests. The analyses performed using Marc/Mentat program for nonlinear analyses take into account the strain hardening phenomenon of sheet material and different values of friction coefficient. The implementation of an Archard’s wear model in the numerical simulation proved the possibility of tool wear simulation in sheet metal forming. As a result of the conducted tests, the places of the stamping die potentially exposed to quick wear were determined. It was found that the most exposed region on accelerated wear is the upper part of the die radius.
Development of rapid qualitative detection DNA microarray platform for Salmonella typhimurium for food safety
Authors: Samphaongern C , Pipatpanukul C , Srikhirin T 
Published: August 2019

Abstract
Screening of possible bacteria contamination in food products is one of the measures implemented to avoid potential health hazards. In food industry, standard cell culture technique is widely used to monitor bacterial contamination. However, the main drawback of this technique is its inherited time consumed during the culturing step, which requires about 72 hours. In this research, an alternative DNA microarray technique was developed for a qualitative screening of a possible Salmonella typhimurium contamination in chicken, with the aim of reducing the detection time down to 3 hrs. The identification of S. typhimurium in food samples was carried out by hybridization of the possible contaminant with specific probe immobilized on a biochip. Novel DNA probes were designed as 16-50 base pairs of nucleotides to recognize with specific parts in S. typhimurium genomic. At least two DNA probes were identified as the candidate probes which had the potential to promote the best hybridization. DNA microarray was fabricated by mixing candidate DNA probes with photoactive polymer network, (poly(DMAA-mABP-SSNa)), and was printed onto a plastic substrate by non-contact microspotter. DNA probe was covalently immobilized onto the surface by 254 nm of UV lamp with 1.25 J/cm2. PCR product functionalized with biotin was hybridized with DNA probe and labelled with streptavidin-cy5. Specific binding yielded fluorescence signal. The intensity image signal was read-out by a fluorescent microarray reader. Two genes specific to S. typhimurium (fimC and invA), were investigated by using specially designed DNA primers and DNA probes. From the assay optimization, it was found that 1 mg/ml of polymer hydrogel concentration, 10 μM of DNA probe concentration, 10 μg/ml of labelling concentration, and 2 nL of array volume yielded the highest signal intensity. The results were calibrated into CFU/ml (cell forming unit). The system was applied successfully for the detection of S. typhiurium without any contamination. The biochip validation with spiked sample (DNA standard) is currently underway.
Effects of Sn Incorporation in ZnO Thin Films on Properties of Perovskite Solar Cells
Authors: Malison P , Bhoomanee C , Choopun S , Wongratanaphisan D , Sagawa T , Ruankham P 
Published: August 2019

Abstract
Properties of electron transporting layer (ETL) play an important role on photovoltaic performances of perovskite solar cells. In this work, effects of Sn incorporation on properties of ZnO-based perovskite solar cells were investigated. Sn-doped ZnO (TZO) thin film as ETL was prepared via a sol–gel method. With 5% atom doping, TZO film coated on an indium doped tin oxide (ITO) substrate provided comparable light transmittance with that of an undoped ZnO/ITO substrate. It was also found that the optical band gap of TZO film (3.30 eV) is slightly wider than that of the ZnO one (3.28 eV). These results suggest that Sn atoms probably incorporated into the ZnO crystal during the sol-gel method. The grains size of perovskite layer coated on TZO or ZnO films also showed variation. The perovskite crystal on the TZO thin film (average 300 nm) was larger than that of the one on ZnO thin film (average 277 nm). The preliminary results indicate that the perovskite solar cell based on TZO film provided higher power conversion efficiency (PCE) of 4.42 % than the ZnO-based device (3.16%). Short-circuit current density (J
sc), open-circuit voltage (V
oc) and fill factor (FF) of TZO-based device were also higher than the ZnO-based device. This may be because TZO film may provide lower resistivity and better ETL/perovskite interface contact, confirmed by lower series resistance and higher shunt resistance of the TZO-based device. Finally, this work introduced a simple method to prepare TZO film at low temperature for photovoltaic application. It may help guide the development of flexible solar cells and other optoelectronic devices.
Reduction of Endotoxin from Human Root Canals by Calcium Hydroxide Nanoparticles
Authors: Lungkapinth P , Louwakul P 
Published: August 2019

Abstract
This study was aimed to evaluate the reduction of endotoxin using the passive ultrasonic irrigation (PUI) of calcium hydroxide nanoparticles (CHNPs) compared with the PUI of calcium hydroxide (CH) and the CH medication. Forty-seven single-root human premolars were used. The root canals were enlarged and sterilized. Escherichia coli endotoxin was inoculated into the root canals. Thirty-six root canals were assigned into three experimental groups: CHNPs irrigation, CH irrigation, and CH medication. For the irrigation groups, the PUI was activated for three min. For the CH medication, the CH was filled into each canal and incubated at 37°C for seven days. The reduction of endotoxin was evaluated by quantitative chromogenic limulus amoebocyte lysate assay. Data was analysed by Kruskal-Wallis and pairwise comparison tests, with a level of significance set at P < 0.05. The CHNPs irrigation was more effective in against endotoxin than the CH irrigation (P < 0.05). No significant difference was found between the CHNPs irrigation and the CH medication (P > 0.05). The irrigation of CHNPs could eliminate most of the endotoxin from the root canals and approximately from 300 μm of root dentin. CHNPs might be potential as an adjunctive irrigation for endotoxin removal.
Biodegradation of Levan Polymer / Poly (Lactic Acid) (PLA) Blend
Authors: Phengnoi P , Thongmee K , Tiptipakorn S , Boekfa B , Kuttiyawong K 
Published: August 2019

Abstract
Poly (lactic acid) (PLA) is a biodegradable thermoplastic. With low elongation and poor degradation properties, many approaches have been developed to overcome these limitations, including copolymerization, blending and plasticizing to improve the mechanical properties. Levans are a group of fructan polymer with act as a good co-polymer, which can be produced by levansucrase using sucrose as substrate. In this study, co-solvent for levan/PLA blend film preparation, thermal properties and biodegradation of levan/PLA blend film were investigated. The result found that DMSO and CH2Cl2 were suitable for the co-solvent process. The Levan/PLA blend films were prepared with levan contents of 0, 0.5, 1, 2, 5, 10, 15 and 20 wt%. The biodegradation of levan/PLA blend film in vitro and in soil conditions showed that 15 wt% levan/PLA at 7 days and 10 wt% levan/PLA at 21 days were the highest weight loss, respectively. In addition, the morphological changes in the Levan/PLA blend film and thermal properties were analyzed by Scanning electron microscope (SEM) and Differential scanning calorimetry (DSC). The results from DSC present that the melting temperature of PLA was slightly decreased with increasing levan contents. Moreover, the holes from degradation were larger and the rougher surfaces were observed with levan contents.
Synthesis of Na-A zeolite from water treatment residue using hydrothermal and microwave techniques
Authors: Theptham B , Asavapisit S 
Published: August 2019

Abstract
Na-A zeolite was synthesized from water treatment residue (WTR) using hydrothermal and microwave techniques. WTR was brought from Metropolitan Waterworks Authority (Thailand) and was activated by firing at 700 °C for 3 h in an electric furnace. The activated WTR was reacted with 3 M NaOH solution in a reactor under a controlled temperature of 80, 90 and 100 °C for 8, 10, 12, and 14 h. SEM (Scanning electron microscopy) images reveal the cubic crystal of zeolite. The highest cation exchange capacity (CEC) was obtained from sample synthesized at 90 °C for 14 h and gave the CEC value of 3.14 meq/g Ca2+. For the microwave technique, the raw materials were reacted at 80 90 and 100°C for 30, 60, and 120 min. Results showed that the sample obtained at 80 °C for 30 min represented the highest CEC value of 0.29 meq/g Ca2+.
Thermal and Melting track Simulations of Laser Powder Bed Fusion (L-PBF)
Authors: Ninpetch P , Kowitwarangkul P , Mahathanabodee S , Tongsri R , Ratanadecho P 
Published: August 2019

Abstract
Laser powder bed fusion (L-PBF) process involves with the construction of phase transformation, melting, and rapid solidification of weld metal powder bed which affects the properties and the microstructure of final parts, e.g. density, dimension, mechanical properties, void, porosity, and non-fully melted particle. The aims of this work were to study the effect of process parameters, e.g. laser power and scanning speed, on the temperature field and melt pool geometry and the characteristics of single melting track in the L-PBF process by using the commercial CFD software simulation Flow-3D (Flow-weld). The laser power, scanning speed, laser spot diameter, and layer thickness varied in this study were 120 W, 140 W, 0.4 m/s, 0.6 m/s, 0.8 m/s, 80 μm and 50 μm respectively. The results stated that at the lower scanning speed, the temperature field has a region of heat distribution larger than that of the higher one. The geometry of melt pools can be changed from ellipse shape to tear drop shape when the scanning speed is increased. The width and depth of laser melting track is increased when the higher laser power and lower scanning speed are applied. The void is found underneath the laser melting track when the scanning speed changes from 0.4 m/s to 0.6 m/s.
Evaluation of silver -copper-tin brazing alloy corrosion behavior in chloride containing electrolyte at various temperature
Authors: Nurrochman A , Prajatelistia E , Cho K 
Published: August 2019

Abstract
Silver base brazing alloys are commonly used for brazing most of ferrous and nonferrous metals alloys. These families of filler metals have a lower brazing temperature due to Sn addition thus offers excellent flow. Meanwhile, the high content of Ag in the alloys guarantees a good corrosion resistance. However, the detrimental effect was shown when it joints in stainless steel. In present work, corrosion behavior of silver-copper-tin brazing alloy was evaluated. The brazing alloy was exposed to water contained chloride and the temperatures were varied at 25, 40, 55, and 70 °C. The electrochemical methods were utilized to evaluate the corrosion behavior of the alloy. The results showed that the dissolution of Sn seems to be initiating the corrosion of the silver-copper-tin brazing alloy. Nevertheless, the active dissolution of the Cu to the solution simultaneously influence the corrosion behavior of the silver-copper-tin brazing alloy. This study in terms of the alloy corrosion behavior in the particular environment should give both of academicals and industrials contributions.