bluuebunny/crossref_metadata_2025 huggingface dataset:
Perbaikan Pengelolaan Pergudangan Melalui Penerapan Sistem Informasi Pergudangan di CV. ABB
Authors: Azwir Hery Hamdi , Patriani Oktavia
Published: June 2017

CV ABB is a medium scale car rental company which manages around 150 vehicles consists of small car (sedan or MPV) until large bus. To supporting the maintenance of all vehicles, they build a warehouse for spareparts and tools. Unfortunately, the management of warehouse does not have a good governance because all records done manually. This situation creates very high risk for data manipulation because manual record method is done by warehouse officer, lost of spare part in warehouse, counterfeit receipt, and no system to control spare part in warehouse. An improvement need to be done by implementing a warehouse management information system to overcome this problem. By applying information system analysis and design concepts and implementing through the application of PHP7 and MySQL, the new system can control all spare part in warehouse including incoming and outgoing spare part, PIC who requests the spare part, checking stock of spare part in the warehouse and stock out used by finance to make purchase order, spare part report from supplier and spare part request report. This system is also able to help finance to create purchase order and get approval from the user in order to make the process is more transparent and accountable.
Pengalokasian Tenaga Kerja dengan Human Factor Engineering di PT. Pelindo I
Authors: Yusnawati  , Matondang Abdul Rahim , Huda Listiani Nurul
Published: June 2017

Indonesia Port Corporation I (PT Pelabuhan Indonesia I (Persero)) or PT. Pelindo I is one of the Indonesian state-owned enterprises which manages port services in western Indonesia. Shipyard unit (Unit Galangan Kapal (UGK)) is a branch of PT. Pelindo I. At present, a problem arises if more than 2 ships are being repaired at once in the unit, UGK scheduling overlaps the repairing activities. In order to solve the problem, study of human factor is important. Human factor is the study of the limitations, capabilities, and human behavior, as well as its interaction with the product, environment, equipment and the establishment of tasks and activities. One part of the human factor is the human factor in system design. In order to improve the effectiveness of the system, the human factor must be involved in each phase of the design process in the system design. This includes a number of activities to obtain input specification work, therefore the working methods and the optimal amount of labor can be determined. Human factors engineering is the application of science that utilizes research on the human factor and use the basic knowledge to design, to repair and to install the system. This research method is causal, searching for the causes which led to delays in the completion of ship repairing. Through human factor engineering approach to the allocation of labor increased by 12.23 per cent of the actual conditions, so that the delay of ship repair were not found during normal conditions.
Portofolio Optimal dan Pengelompokan Perusahaan Berdasarkan Pengaruh Komoditas Dunia
Authors: Yuliandra Berry , Hasan Alizar , Rezeki Rahmad
Published: June 2017

The awarding of investment grade to Indonesian Stock Exchange marked an excellent development in the national capital market. This could be the key to attracting foreign investors that will further integrate the Indonesia capital market with international markets. Increasingly integrated capital market will also be more vulnerable to international issues such as the volatility of global stock indices as well as the volatility of world commodity prices (crude oil, CPO, gold etc.) as indicated by IHSG response to these issues. To minimize risk and maximize the return are the main goal of investment. Both of these two objectives can be achieved through stocks diversification and the portfolio development. Optimal portfolio requires the right stocks diversification. Therefore, investor needs to have information about which stocks are affected and unaffected by world commodity prices prior to diversifying. The goal of this research is to examine the way to form optimal portfolio from the group of companies listed in Indonesian Stock Exchange and affected by world commodity prices. Augmented Dickey Fuller (ADF) method used for stationary test of time series data and residual regression models. Regression Analysis conducted for co-integration test between commodity prices and IHSG. Error Correction Model used for correcting short-term errors. Optimal portfolio formed with Single Index Model and Treynor Index used to measure the optimal portfolio performance. Result of the study showed that gold, crude oil, platinum, rubber, corn, cotton, and Arabica coffee are the global commodities that can be used to predict the direction of IHSG movement.
Activities Undertaken at the Central Department of Geography: 2008-2010
Authors: Pradhan Pushkar K
Published: June 2017

Introduction: The Central Department of Geography (CDG) at Kirtipur is one of the leading Departments of the Faculty of Humanities and Social Sciences, Tribhuvan University. The Department was established in 1958. Since then, it has been actively serving the country in higher education and research. CDG runs regular Master’s and PhD programmes in Geography. It is a pioneer Department in running courses - Geographic Information System (GIS) and Remote Sensing (RS) in the country. Being a central department, it has to look after the academic programmes and activities of 22 Departments of Geography under the Tribhuvan University’s constituent campuses spreading across different parts of the country, where there are proficiency certificate and bachelor level studies. Of these, the Department of Geography at Prithvi Narayan Campus, Pokhara also runs regular Master’s degree, in addition to proficiency certificate and bachelor levels. This paper portrays the academic activities concerning with strengthening of geography subject being held at CDG from October 2008 onward.The Geographical Journal of Nepal, Vol. 7, 2009: 61-66
Maternal and Perinatal Outcomes Among Pregnancies Complicated by Isolated Oligohydramnios Compared with Normal Amniotic Fluid Index
Authors: Shrestha Ramesh , Uprety DK , Thakur A
Published: June 2017

Aims: The study was aimed to compare the maternal and perinatal outcomes among pregnancies with isolated oligohydramnios compared to normal amniotic fluid volume  between 37-42 weeks.Methods: It was a prospective cohort study done among the singleton pregnancies between 37-42 weeks with isolated oligohydramnios taken as cases (n=100) and pregnancies with normal levels of amniotic fluid matched to cases by gestational age and parity in 2:1 ratio fulfilling the inclusion criteria were taken as controls (n=200). Both the mother and baby were followed up till discharge for outcomes.Results: Majority of the patients (n=300) were of  age group 20-30 years (79.0%). Most of them (n=300) were primigravida (74.0%). The overall caesarean section rate was 24.66% (n=300). In the oligohydramnios group, 43.0% had undergone induction of labour (p value<0.05), 63.0% had undergone caesarean section (p value=0.001) and the most common indication for caesarean section was non-reassuring NST (44.44%) (p value<0.05). 26.0% babies had low birth weight, 12% had birth defects, 10.0% were small for gestational age (p value<0.05). There were significantly more ICU admission (13.0% vs 3.5%), early neonatal death (6.0% vs 1.5%), fetal distress (6.0% vs 1.5%) in the oligohydramnios compared to control group ( p value<0.05).Conclusions: Patients with oligohydramnios have increased labour induction, increased operative interferences and increased neonatal mortality and morbidity compared to patients with normal fluid volume.
Innovations managériales, attrapons-les toutes !
Authors: Adam-Ledunois Sonia , Damart Sébastien
Published: June 2017

Détecter, analyser, qualifier l’innovation managériale (IM) requiert une méthodologie de repérage et de caractérisation critique de ces objets. Cet article1propose une approche méthodologique pour qualifier la nature des IM. Une revue de la littérature aide à identifier les deux dimensions sur lesquelles il est possible de qualifier les ruptures constitutives d’une IM : l’une, fondée sur le caractère relatif au contexte organisationnel, l’autre, fondée sur le caractère absolu de l’IM (par rapport à l’état de l’art).
Early low cerebral blood flow and high cerebral lactate: prediction of delayed cerebral ischemia in subarachnoid hemorrhage
Authors: Rostami Elham , Engquist Henrik , Howells Timothy , Johnson Ulf , Ronne-Engström Elisabeth , Nilsson Pelle , Hillered Lars , Lewén Anders , Enblad Per
Published: June 2017

OBJECTIVE

Delayed cerebral ischemia (DCI) following subarachnoid hemorrhage (SAH) is one of the major contributors to poor outcome. It is crucial to be able to detect early signs of DCI to prevent its occurrence. The objective of this study was to determine if low cerebral blood flow (CBF) measurements and pathological microdialysis parameters measured at the bedside can be observed early in patients with SAH who later developed DCI.

METHODS

The authors included 30 patients with severe SAH. The CBF measurements were performed at Day 0–3 after disease onset, using bedside xenon-CT. Interstitial glucose, lactate, pyruvate, glycerol, and glutamate were measured using microdialysis.

RESULTS

Nine of 30 patients developed DCI. Patients with DCI showed significantly lower global and regional CBF, and lactate was significantly increased in these patients. A high lactate/pyruvate ratio was also detected in patients with DCI.

CONCLUSIONS

Early low CBF measurements and a high lactate and lactate/pyruvate ratio may be early warning signs of the risk of developing DCI. The clinical value of these findings needs to be confirmed in larger studies.
Role of intraoperative dynamic magnetic resonance myelogram in management of giant dorsolumbar spinal extradural arachnoid cyst: case report
Authors: Mishra Rakesh Kumar , Pruthi Nupur , Bharath Rose Dawn , Malla Bhaskara Rao
Published: June 2017

Giant dorsolumbar spinal arachnoid cysts are a complex, poorly understood, and difficult to manage clinical entity. Traditional CT myelography is technically difficult to use in these cases to detect the site of leakage preoperatively. The authors report a novel technique for detecting the site of the leak by using sequential, dynamic intraoperative MR myelography. To the authors’ knowledge, there is no other similar report in the literature.
Imaging of congenital torticollis in infants: a retrospective study of an institutional protocol
Authors: Boyko Nicholas , Eppinger Melissa Ann , Straka-DeMarco Deborah , Mazzola Catherine Anne
Published: June 2017

OBJECTIVE

The authors’ objectives in this study were to evaluate their institutional protocol and create recommendations for radiographic imaging in infants with torticollis, with or without plagiocephaly, based on a retrospective clinical analysis and literature review.

METHODS

A retrospective analysis was conducted to identify infants with torticollis who were evaluated by the craniofacial team. The following patients were identified: those who underwent imaging in the form of radiography, CT scanning, or MRI; those who had a secondary diagnosis or additional clinical finding as the indication for imaging; and those with persistent torticollis despite completion of recommended repositioning techniques and physical therapy (PT).

RESULTS

A total of 683 infants between the ages of 1 day and 335 days (mean age 141.6 days) were referred for management of torticollis. Initial imaging was performed in 48 patients, of whom 44 were identified as having a diagnosis other than torticollis or a significant clinical finding as the indication for imaging. The remaining 4 patients (0.6% of the torticollis population) underwent imaging and did not have an additional diagnosis or a significant clinical finding. There were no abnormal radiological findings in these patients. Of the 639 patients diagnosed with congenital torticollis who did not have a secondary diagnosis that required initial imaging, 99.2% (634 patients) achieved resolution of torticollis with recommended repositioning techniques and completion of PT and without radiography, CT, or MRI.

CONCLUSIONS

Within the limits of this retrospective study and supporting literature, the authors provide the following recommendations regarding radiographic imaging of infants with congenital torticollis. 1) Clinical examination is sufficient in the diagnosis of congenital torticollis in infants. Radiography, CT scanning, and MRI are not necessary. 2) In cases in which additional clinical or neurological findings are present, imaging may be recommended. 3) PT and repositioning techniques are the recommended treatment modalities for congenital torticollis. 4) Additional evaluations should be performed throughout the duration of PT to assess progress and response to therapy. 5) Imaging should be performed to rule out nonmuscular pathologies if torticollis persists after 1 year of treatment.
An Impeccable Solution Procedure of Stochastic Programming Problems by Inserting Scenarios in Deterministic Case
Authors: Chakroborty Sajal , Hasan M Babul
Published: June 2017

In this paper, a new technique has been developed for solving stochastic programming problems by using the idea of decomposition based pricing method. A computer code has also been developed by using a mathematical programming language AMPL and a real life oriented model has been developed. The technique has been demonstrated by analyzing the model for different data sets which has been collected for different scenarios. To our knowledge, this is the first work for solution procedure of stochastic programming problems by using decomposition based pricing method.GANIT J. Bangladesh Math. Soc.Vol. 36 (2016) 19-32
Thermal Cycle and Combustion Analysis of a Solar-Assisted Micro Gas Turbine
Authors: Abagnale Carmelina , Cameretti Maria , De Robbio Roberta , Tuccillo Raffaele
Published: June 2017

The authors discuss in this paper the potential of two power plant concepts for distributed generation, based on the integration of a cogenerating micro gas turbine with a solar panel array. The first one relies on the adoption of a parabolic trough network with an intermediate thermal carrier, while the second one considers the direct heating of the working air in a solar tower system. The first solution also includes a bottoming organic Rankine cycle (ORC) plant, so that it is mainly addressed to the power output increase. The second one involves a relevant temperature increase of the air entering the combustor, so allowing a direct fuel energy saving, whose amount is strongly variable with both the solar irradiance and the eventual part-load operation. In addition, the latter solar-assisted scheme involves noticeable variations in the conditions for the combustion development. This suggested the authors to proceed with a detailed CFD analysis of the combustion, after a preliminary thermal cycle study for highlighting the main benefits from the solar integration of the power plant.
Rapid Screening of Graphitic Carbon Nitrides for Photocatalytic Cofactor Regeneration Using a Drop Reactor
Authors: Huang Xiaowen , Hao Huimin , Liu Yang , Zhu Yujiao , Zhang Xuming
Published: June 2017

Artificial photosynthesis is the imitation of natural photosynthesis, which promises an efficient way to use solar energy to synthesize organic matters, in which the key step is the coenzyme regeneration (NADH/NADPH). To achieve an efficient regeneration rate, various photocatalysts have been developed, such as g-C3N4 and mesoporous carbon nitride (mpg-C3N4). Generally, efficiency determination of different photocatalysts requires laborious experiments, high consumption of reagents, and a considerable amount of time. Here, based on the one-step artificial photosystem I method, we processed the analytical experiment in a very simple PDMS well (20 μL, a drop) to achieve a rapid screening of photocatalysts. For comparison, we used two types of graphitic carbon nitrides, few-layer g-C3N4 and mpg-C3N4. Compared with the slurry systems, firstly, the regeneration rate of mpg-C3N4 drop-reactor system is 4.3 times and 7.1 times those of the few-layer g-C3N4-slurry system and mpg-C3N4-slurry system, respectively. Secondly, this one-drop method reduces the typical verification time from 90 min to 5 min and lowers the liquid volume from 20 mL to 20 μL. Thirdly, this operation is a pump-free and soft lithography technique-free process. The miniaturization of the photocatalytic reaction in the PDMS well improves the regeneration rates, saves samples, and achieves high-throughput screening of multiple photocatalysts.
Phytochemical Quantification and the In Vitro Acetylcholinesterase Inhibitory Activity of Phellodendron chinense and Its Components
Authors: Kim Yu , Lim Hye-Sun , Kim Yoonju , Lee Jun , Kim Bu-Yeo , Jeong Soo-Jin
Published: June 2017

The dried bark of Phellodendron chinense has been used as a traditional herbal medicine to remove damp heat, relieve consumptive fever, and cure dysentery and diarrhea. In the present study, we performed quantitative analyses of the two components of P. chinense, phellodendrine and berberine, using high-performance liquid chromatography. A 70% ethanol extract of P. chinense was prepared and the two components were separated on a C-18 analytical column using a gradient solvent system of acetonitrile and 0.1% (v/v) aqueous trifluoroacetic acid. The ultraviolet wavelength used for detection was 200 nm for phellodendrine and 226 nm for berberine. The analytical method established here showed high linearity (correlation coefficient, ≥0.9991). The amount of phellodendrine and berberine used was 22.255 ± 0.123 mg/g and 269.651 ± 1.257 mg/g, respectively. Moreover, we performed an in vitro acetylcholinesterase (AChE) activity assay and an amyloid-β aggregation test to examine the biological properties of phellodendrine and berberine as therapeutic drugs for Alzheimer’s disease. Phellodendrine and berberine inhibited AChE activity in a dose-dependent manner (IC50 = 36.51 and 0.44 μM, respectively). In contrast, neither phellodendrine nor berberine had an effect on amyloid-β aggregation. The P. chinense extract and phellodendrine, but not berberine, exhibited antioxidant activity by increasing radical scavenging activity. Moreover, P. chinense demonstrated a neuroprotective effect in hydrogen peroxide-treated HT22 hippocampal cells. Overall, our findings suggest that P. chinense has potential as an anti-Alzheimer’s agent via the suppression of the enzymatic activity of acetylcholinesterase and the stimulation of antioxidant activity.
Assessment of Ecological Assets for Sustainable Regional Development: A Case Study of Deqing County, China
Authors: Lu Mengqiu , Cheng Jianquan , Jin Cheng
Published: June 2017

Sustainable development has become a main concern of governments at a variety of levels. Assessing ecological assets, which is significant for the sustainability of human society, plays an important role in measuring the performance of local governments. Using Deqing County in Zhejiang Province as a case study, this paper adapts a county-level indicator assessment of ecological assets and quantifies these indicators using high-resolution data sets. The resulting value of ecological assets in Deqing County accounts for 24.85% of its GDP, which is much higher than other published case studies across China. Through contrasting per capita valuation of ecological assets and per capita enterprise taxation at township level, this paper has classified all townships into four categories, each of which has varied implications for the local development strategy from the perspective of sustainability. This study implies that the integration of the valuation of ecological assets into the measurement of political performance at the lowest township level enables the provision of quantitative evidence to enhance sustainable development at local (county) level.
Synthesis, spectroscopic characterization and thermogravimetric analysis of two series of substituted (metallo)tetraphenylporphyrins
Authors: Al-Shewiki Rasha K , Mende Carola , Buschbeck Roy , Siles Pablo F , Schmidt Oliver G , Rüffer Tobias , Lang Heinrich
Published: June 2017

Subsequent treatment of H2TPP(CO2H)4 (tetra(p-carboxylic acid phenyl)porphyrin, 1) with an excess of oxalyl chloride and HNR2 afforded H2TPP(C(O)NR2)4 (R = Me, 2; iPr, 3) with yields exceeding 80%. The porphyrins 2 and 3 could be converted to the corresponding metalloporphyrins MTPP(C(O)NR2)4 (R = Me/iPr for M = Zn (2a, 3a); Cu (2b, 3b); Ni (2c, 3c); Co (2d, 3d)) by the addition of 3 equiv of anhydrous MCl2 (M = Zn, Cu, Ni, Co) to dimethylformamide solutions of 2 and 3 at elevated temperatures. Metalloporphyrins 2a–d and 3a–d were obtained in yields exceeding 60% and have been, as well as 2 and 3, characterized by elemental analysis, electrospray ionization mass spectrometry (ESIMS) and IR and UV–vis spectroscopy. Porphyrins 2, 2a–d and 3, 3a–d are not suitable for organic molecular beam deposition (OMBD), which is attributed to their comparatively low thermal stability as determined by thermogravimetric analysis (TG) of selected representatives.
Le Château de Barbe Bleue. Opéra « mystère » et quête d’entièreté
Authors: Beldent Véronique
Published: June 2017

Le Château de Barbe Bleue , opéra de Bartók sur un poème-ballade de Balázs est un « mystère » au sens ancien du mot qui n’a plus beaucoup de rapport avec le conte de Perrault. La ballade comme la musique puisent aux racines culturelles de Transylvanie et tentent l’intégration de l’ancien au moderne. La ballade de Balázs par sa structure poétique conduit le conte vers la légende. Par le traitement des voix, de l’orchestration et l’utilisation de structures archétypiques musicales, Bartók transforme la légende en mythe et vient révéler la présence de deux noyaux mythiques. Le nom Kékszakállú (Barbe Bleue) traité comme une incantation vocale pour Judit est appel à la vie. Le mot château appelle la pierre, la pétrification et sa nécessaire animation. Les mythes musicaux, dont Hermès est l’acteur se caractérisent par leur dynamique de renversement/inversion et font de la musique un organisateur de la totalité par le rapprochement des contraires.
Éros et Psyché. Un conte, un parcours initiatique
Authors: Mauchant-Renoult Pascale
Published: June 2017

Le conte d’Éros et Psyché fut relaté par Apulée. L’étude de la trame de ce conte permet de relier les différents temps de son histoire avec le parcours initiatique que constitue le processus d’individuation. Les épreuves auxquelles est soumise Psyché sont mises en perspective par des illustrations cliniques ainsi qu’un film d’animation récent. L’intemporalité du message délivré par les contes est ainsi mise en évidence.
Aiguille sans fil
Authors: Langer Adriana
Published: June 2017

Une psychiatre qui prend sa retraite fait à la fois ses cartons et le bilan des années passées.
Le secret de Barbe-Bleue et les résolutions de l’énigme
Authors: Gibeault Alain
Published: June 2017

Le personnage de Barbe-Bleue est convoqué pour illustrer l’élaboration des angoisses primitives relatives à l’imago maternelle archaïque, telles que suggérées par le conte de Perrault, l’opéra de Bartok et l’analyse de Minerve. Les références au bouclier-miroir de Persée et à la réponse d’Œdipe devant le Sphinx sont utilisées pour décrire les conditions d’un processus de symbolisation dans la cure analytique.
Optimum Design of Vent Pipe of Fire Station by Using Analytical Approach of Heat Transfer
Authors: Kang Gyung Ju , Cho Seok Swoo , Lee Sung Riong
Published: June 2017

This paper presents the optimal design of vent pipe in a fire station by using design of experiments and analytical method of heat transfer theory. In order to calculate formulation without using tables, equations in terms of temperature are developed for five air properties such as specific heat, thermal conductivity, kinematic viscosity, density and Prandtl number. It is shown that the equations accurately approximate the variations of air properties in terms of temperature. Series of design analysis are performed under considering the process parameters such as inlet temperature, pipe diameter and heat transfer rate. Orthogonal arrays of L27 are used. The signal-to-noise (S/N) and analysis of variance (ANOVA) are utilized to determine the effect of parameters on objective functions, surface temperature and outlet temperature. From the results it is clear that inlet temperature is prominent on objective function.
Magnetic Material Generator for Producing Electricity from Mechanical Energy in Air Conditioner Condenser Unit
Authors: Mano Chanita , Prompak Kriangsak , Thongtha Atthakorn
Published: June 2017

This research aimed to study the possibility of producing the electricity from mechanical energy in the condensing unit of air conditioner. The electrical generator with the capacity of around 28 W was operated with the rotor motor of the condensing unit of air conditioner. Then, the electricity generator was tested with the room dimension of 6.60 m x 5.15 m x 2.60 m. The quantity of electric voltage, current, power, ambient and room temperature, ambient and room humidity was recorded for 3 days during a working period from 8 am to 5 pm. The results show that the electrical generator with the capacity of 28 W is suitable because it was not a load of motor in the condensing unit which was checked by the rotation frequency. Approximately 0.065 A of current, 85 V of voltage and 5.5 W of electrical power were constantly produced from the generator during the period of 8 am to 5 pm. The potential of electricity generation was around 14.1 W/day.
The Phase Transition of Corundum-Eskolaite Mineral Series Probed by X-Ray Absorption Spectroscopy
Authors: Monarumit Natthapong , Wongkokua Wiwat , Häger Tobias , Wathanakul Pornsawat , Satitkune Somruedee
Published: June 2017

The red color of ruby is caused by Cr3+ impurities substituting Al3+ in Al2O3 structure. The complete substitution of Al3+ by Cr3+ produces Cr2O3 that has the green color. In this study, we focused on the phase transition of solid solution between corundum (Al2O3) and eskolaite (Cr2O3) mineral series. A series of Al2O3-Cr2O3 samples were prepared by mixing fine powder of Al2O3 and Cr2O3 in various ratios. They were ground together and then recrystallized. The obtained crystals were ground again in powder form for X-ray absorption near edge structure (XANES) measurements to avoid polarization dependence. The measurements were carried out at the Cr K-edge absorption energy using a 13-channel array Ge detector in the fluorescence mode. The XANES spectra showed line-shape transitions for 0.125 to 100% variation of Cr2O3. Significant variations in transitions were found when the Cr2O3 content was between 20% and 80%. With Cr2O3 concentration increasing, the sample colors apparently turned from pink to dark green. CIELAB color index measurements were performed. The variations of line-shape spectra of the Al2O3-Cr2O3 samples were found to be consistent with the CIELAB color index results. This Cr K-edge XANES study could be useful for the research in mineral sciences.
Unknown Offset Free MPC for Buck Converter
Authors: Li Po , Liu Rui Nan , Ma Xiang Hui
Published: June 2017

Buck converters are commonly used as DC power supplies. To deal with the parameters uncertainty in R-L (resistance-inductance), an Unknown Offset Free Model Predictive Control (UOFMPC) method for buck converters have been proposed in this paper. Firstly, a continuous model for buck converters is established. Based on it, a discrete model with fixed sampling time is derived and the output of controller is set as the direct switch on/off signals. Secondly, one-step MPC method aimed at optimizing the output voltage with recursive least squares algorithm for parameters identification is given to satisfy the ability of adaptation in parameters. Finally, both the model and control scheme are validated by simulation in MATLAB/Simulink.
Effect of Ammonia on the SiO2 Colloidal Particles Synthesized by the Stöber Method
Authors: Cai Yun Gao , Li Xin Qi
Published: June 2017

Various sizes SiO2 colloidal particles in the size range of 260-950 nm were synthesized by the stöber method by adjusting the amount of ammonia from 9.0 ml to 3.0 ml while keeping 20.0 ml tetraethyl orthosilicate (TEOS), 125.0 ml ethanol, 6.0 ml ammonia and 18.0 ml distilled water fixed. In addition, X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to analyze the crystallinity and morphology of the synthesized SiO2 colloidal particles; the XRD result show that the SiO2 colloidal particles are amorphous at room temperature; the SEM results demonstrated that the amount of ammonia could have significant effects on the size, size distribution and sphericity of the SiO2 colloidal particles. SiO2 colloidal particles were resulted with good monodispersity when the amount of ammonia was in the range of 6.0-90 ml, while SiO2 colloidal particles with double size distribution were obtained when the range is 3.0-4.5 ml; on the other hand, SiO2 spheres were resulted with good sphericity when the ammonia is in the range of 6.0-7.5 ml.
Experimental Study of Composite High Strength Self-Compacting Concrete
Authors: Kang Xi Ri , Fang Guang Xiu
Published: June 2017

This test uses polycarboxylate superplasticizer by adding 15% quantitative fly ash, 10%, 15%, 20% of slag, and 5%,7.5%, 10% of silica fume of the total amount of the cementitious material to be an equivalent replacement for cement. Ordinary materials were used to make the C70 high strength self-compacting concrete. The concrete slump, expansion degree, and the axial compressive strength of concrete were studied. Through testing, the mix proportion of each group of concrete slump was determined to be above 250mm. And the expansion degree to be above 550mm. The axial compressive strength satisfied the design strength value. At the same time, the optimal mix ratio was proposed. And the economic performance of each group was analyzed. There are references for a similar experimental design and engineering application.
Effects of Ca and RE Additions on the Precipitation and Microstructure of As-Cast AZ91 Alloy
Authors: Fu Li , Le Qi Chi , Gou Pei Li , Wang Xi Bo , Liu Xuan
Published: June 2017

The effect of Ca and RE metal additions on the precipitation and microstructure of as-cast AZ91 alloy was systematically investigated. It was found that Ca and RE additions could result in phase and microstructure changes. The XRD pattern showed the crystallite phase of as-cast AZ91 alloys consists of α-Mg matrix and β-Mg17Al12, however, after adding 1.5wt. % Ca and 0.8wt. % RE (0.5wt. % Sm and 0.3wt. % La), peaks coincident with Al2Ca, Al2Sm and Al11La3 intermetallic compounds were found, suggesting the generation of relative precipitates. The SEM images indicated that in as-cast alloys, the Al2Ca intermetallic compound was located at grain boundaries with a lamellar structure, and the Al2Sm intermetallic compound was homogeneously distributed in the α-Mg matrix or near the grain boundaries with a polygonal structure, and the Al11La3 intermetallic compound was located at grain boundaries with a needlelike structure. These intermetallic compounds could reduce the amount of β-Mg17Al12 and refine the microstructure of as-cast AZ91 alloy.
Experimental Static Load Test of Prestressed Concrete Slab-on-Ground Model
Authors: Mynarcik Petr , Koktan Jiri
Published: June 2017

This experimental static load test is part of research activities scoped on problematics with involved foundation conditions. Especially for areas with influence of undermining or flood hazard. Concept of experiment was designed like a model situation of interaction between concrete column, concrete slab-on-ground and subsoil. During static load process were measured deformations, tensions inside the experimental model and geotechnical values on contact surface of concrete slab-on-ground and subsoil. These data were processed and presented in this article. The described experimental static load test is part of a series of experiments focusing on the problematics of concrete constructions in interaction with subsoil and was realized at the Faculty of Civil Engineering, VŠB –Technical University of Ostrava.
Numerical Simulation of Weather Resistance Experiment for Insulated Decorative Panel
Authors: Hu Xiang Lei , Ying Gao , Xu Z.
Published: June 2017

This paper presents heat transfer and deformation of an insulated decorative panel subject to weather resistance experiments using finite element analysis of ANSYS software. A 3D model is developed following a typical external structure of standard high-rise residential building, then thermal performances of hot-rain cycle, hot-cold cycle, and freeze-thaw cycle experiments are predicted numerically. According to the results of ANSYS analysis, it is found that stress due to temperature change concentrates at external corners between wall and doors and windows. It is suggested that the pasting area of inorganic mortar insulation decorative panel and bonding mortar should be strengthened in order to reduce the influence of temperature stress, and meanwhile, to adapt to the temperature deformation, the width of seam should be wide enough to avoid any sealing failure.
Correlations among Physical and Mechanical Parameters of Rocks
Authors: Liu Jing Sen , Li Hai Bo , Zhang Guo Kai , Deng Jian
Published: June 2017

In order to improve the accuracy of the rock mechanical parameters, the correlations among physical and mechanical parameters were investigated. A large number of laboratory testing results curried out on 408 rock specimens including metamorphic rocks, sedimentary rocks and igneous rocks. Through the statistical analysis of the laboratory test data, several regression equations among rock material parameters were established. The research suggests that, in addition to Poisson's ratio, the mechanical parameters (unconfined compressive strength (UCS), elastic Young’s modulus, shear modulus) relate well to physical parameters (porosity, P-wave velocity), and the relationships are mainly described by power and exponential correlations which have good squared regression coefficients. The correlation between elastic Young’s modulus and dynamic elastic modulus was established, as well as the relationship between shear modulus and dynamic shear modulus.
Relation between Uniaxial Compressive Strength and Physical Parameters of Rock in a Nuclear Power Plant
Authors: Liu Jing Sen , Li Hai Bo , Liu Bo , Zhang Guo Kai , Zhou Wei
Published: June 2017

In order to improve the accuracy of the selection on rock mechanical parameters, the relation between uniaxial compressive strength (UCS) and physical mechanical parameters should be investigated. A great number of physical and mechanical tests on rock in the first-stage of Guangxi Fangchenggang Nuclear Power Plant (GFNPP) are conducted. Mineral identification tests of rocks are conducted, and rocks are divided into two groups (A and B) according to the result of the test. The correlation coefficient between rock UCS and rock physical parameters (porosity, density and P-wave velocity) are calculated by using Pearson’s analytical method. The result shows that the relationship between physical parameters and mechanical parameters of rock is influenced significantly by content of quartz. Regression analysis method is used to explore the relation between UCS and porosity, density, P-wave velocity of rock; combined with the dimensional analysis, the relation between UCS and rock physical parameters was established. Based on normality test and randomness test, the best fitting equation is determined as the empirical equation of UCS. The empirical equation was used to forecast the UCS of rock in the second-stage of GFNPP, comparative results show that the forecasting value and the experimental value are in good agreement.
Finite Element Thrust Line Analysis (FETLA) of Axisymmetric Masonry Dome with Meridian Cracks
Authors: Varma Mahesh , Ghosh Siddhartha , Milani Gabriele
Published: June 2017

Many masonry domes in their lower portion are subjected to hoop tensile forces which mostly lead to vertical cracks appearing along the dome's meridian planes. A close inspection of any such dome reveals these hoop tension cracks. The dome stands as a series of arches with common key stone, with cracks as a matter of non-structural consequences. Different strategies have been considered historically to arrest these cracks. The provision of tension ring mechanism adds to the stability of these domes, and hence many masonry domes are retrofitted with the provision of the tension rings using steel and FRP rings. The challenge in such retrofitting will remain to analyze its effect on stability of these masonry domes, more specifically in absence of reliable mechanical properties of such masonry domes. This paper presents a simplified analysis procedure combining thrust line analysis with the finite element analysis called here as Finite Element Thrust Line Analysis (FETLA). The development of a new element suitable for masonry dome analysis to include the effect of hoop tension cracks is demonstrated. The orthotropic material properties are utilized for penalty approach to allow redistribution of the forces from meridian direction to the hooping rings, with thrust line approaching the extrados or intrados of the dome. The analysis results of FETLA are validated with the previously available results. The analysis method proposed in this paper gives the rational estimates for the failure load without utilizing inelastic properties of the material to model the hoop tension cracks and its propagation.
Damping Force and Energy Regeneration Characteristics of the Regenerative Pendulum Vibration Absorber
Authors: Syuhri Skriptyan Noor Hidayatullah , Ilminnafik Nasrul
Published: June 2017

This paper presents the characteristics of damping force and energy regeneration of a pendulum. The damping force analysis includes force-displacement and force velocity loops when the pendulum, attached in a cart, is subjected with sinusoidal displacement input. The energy regeneration analysis includes the voltage, the current and the power generated by a generator. The main objectives of this paper are to obtain the mathematical models and to characterize both force and energy regeneration based on the inputs. The results show that the amplitudes and the frequencies at low level are most likely basic damper behavior. Moreover, the energy regeneration increases as well as the amplitude and the frequency.
An Increase in Accuracy of Robotic Milling
Authors: Ilyukhin Yu.V. , Kolesnichenko Ruslan
Published: June 2017

The results of the theoretical research and the computer simulation, aimed at increase in accuracy of robotic milling, are presented in the article. An analysis of the mathematical models of the system «technological robot – milling process» is conducted. The prospects of the usage of precision geared dual motor servo drives and trajectory-impedance control systems are underlined. A computer research of the tool movement accuracy during the robotic cylindrical up-milling process, depending on path velocity of the milling cutter and rated value of the cutting depth, has been carried out. Two types of manipulators have been considered: a manipulator with traditional geared servo drives with one motor and a manipulator with the suggested precision dual motor drives. In order to measure accuracy of movements during the computer simulation process a deviation of the tool, normal to the desired trajectory of its movement, has been defined. The results testify the facts that dual motor servo drives allow us to significantly increase dynamic stiffness of technological robots and they promote increasing accuracy and performance of robotic milling.
Direct Kinematics of 6-RSPS Driving Simulation Platform Based on FBGS Algorithm
Authors: Yang Chun Jie , Li Jian Jun , Yang Xiu Zhi
Published: June 2017

A new 6-RSPS simulator platform mechanism is proposed compared with the traditional 6-SPS mechanism. It is more verisimilar when simulating a vehicle’s turning because it can realize unlimited rotation around Z axis so as to avoid the washout algorithm in the direction of Z axis. The kinematics model is established by the rod length vector relationship. The BFS algorithm is applied to calculate the direct kinematics of 6-RSPS mechanism, and the precise direct kinematics solution can be obtained in the condition that the number of iterations decreases. Through the direct kinematics of 6-RSPS with the reverse kinematics solution to find that the rod length errors and the rotary angle errors are all controlled below 1.1 percent.
The Design and Optimization of PID Suspension Controller Based on Genetic Algorithm
Authors: Song Rong Rong
Published: June 2017

In order to improve the strong nonlinearity and uncertainty of the suspension system, the suspension system was transformed into two different linear subsystems by the Taylor’s formula and the proportional-integral-differential controller based on genetic algorithm was designed in this article. Optimizing the code, the population size, the crossover probability, the mutation probability and the maximum number of iteration, we obtained respectively the optimized parameters of the controllers of the electromagnet 1 and the electromagnet 2. The simulation results showed that the optimized suspension system had a good robustness.
Passive Tracking Algorithm with Transmitter Attribute Information
Authors: Ding Feng , Ouyang Zhi Hong
Published: June 2017

Traditional passive tracking algorithms are usually subjected to problems such as the poor measurement accuracy of parameters of target motion, complex algorithm, instable tracking precision under complex circumstances. Aiming at this issue, in this paper we combined the dual function of transmitter identification and target tracking in passive reconnaissance, discussed the selection of transmitter eigenvector in passive tracking based on transmitter attribute information, established the passive tracking algorithm framework combined with transmitter attribute information, and then investigated passive tracking arithmetic model based on statistical regulation and ratiocinative regulation respectively, in the hope of providing new idea for passive target tracking.
Content Analysis Tools Applied to the Speech on Economic Growth and Sustainability - Building Materials and the Asbestos Issue
Authors: Lopes Luiz Antonio Coelho , Salles LUIZ ANTONIO
Published: June 2017

This work proposes and appreciates the use of content analysis techniques on dilemmas involving economic growth and environmental sustainability. To achieve this purpose, uses the asbestos issue, through the exam of specialists’ communications in a public audience on the Federal Supreme Court, in which the unconstitutionality of the State law that forbids the utilization of this material. The specialists who were called by the Supreme Court are divided between those who admit the possibility of its safe use and the ones who preach its ban and their speeches are studied based on the differences between the different kinds of asbestos, serpentine and amphibole. Additionally, are considered the social costs of its maintenance in terms of health and social security and the costs involved in its substitution in terms of job positions, income and derivative products’ prices. The content analytical techniques proved adequate to the evaluation of speeches and communications between currents with distinct positioning in terms of sustainability and development.
The Analysis of Effectiveness of BWR/6 URG Strategies
Authors: Wang Ting Yi , Hsu Yu Ting , Chen Shao Wen , Wang Jong Rong , Shih Chun Kuan , Chiang Show Chyuan , Yu Tzu Yao
Published: June 2017

After the Fukushima Daichii accidents, Taiwan Power Company developed a strategy to cope with such extended SBO (Station Blackout) cases at nuclear power plants, which called URG. The MAAP and PCTRAN were used to perform the study for Kuosheng BWR/6 nuclear power plant (NPP) ultimate response guideline (URG). The main actions of URG are the depressurization and low pressure water injection of the reactor and the venting of the containment. This study focuses to confirm the URG efficiency. The analysis results depict that following the URG, the fuel can be covered by the coolant, no exposure. It can also prevent the radiation release and the large evacuation. It indicated that Kuosheng NPP was at the safe situation. It shows that the two-step depressurizations can extend the time of the preparation of alternate water source. The minimum injection rate to prevent the fuel to expose is 192 gpm in MAAP.
Using Analytic Hierarchy Process to Optimize PESTEL Scenario Analysis Tool in Huge Construction Projects
Authors: Lamas Leite José Geraldo , de Brito Mello Luiz Carlos Brasil , Longo Orlando Celso , Cruz Eduardo Picanço
Published: June 2017

This paper uses the Analytic Hierarchy Process to optimize the PESTEL analysis. The scenario: pre-construction and assembly factors of huge civil engineering construction projects. Several managers use too many criteria to evaluate large projects. It suggests that there may be few important criteria that summarize the manager's preference. To demonstrate the feasibility of the proposed hypothesis, the authors prepared a qualitative and exploratory study. Conclusions are based on the judgment of an expert interviewed. As expected, the hypothesis was considered plausible. Two main criteria corresponded to 71% of the expert's preference. The result resembles a Pareto distribution.
Materials for Measuring Instant Messenger Application Adoption: Malaysians’ Perspectives
Authors: Indrawati Indrawati , Raman Murali , Ariyanti Maya , Chew Kok Wai
Published: June 2017

Recently the usage of telecommunication networks in term of duration and frequency is increasing due to the invention of instant messenger applications such as WhatsApp, Blackberry Messenger (BBM), LINE, KakaoTalk, WeChat, and Telegram. Especially in Malaysia, the usage duration is the highest among the six countries in South East Asia-- Indonesia, Philippines, Singapore, Thailand, and Vietnam. It is important to know the factors influence the behaviour Malaysian toward the adoption of Instant messenger application in order to increase the usage frequency and duration of application in other countries. A study of Indrawati, Raman, Ariyanti, and Chew in 2015 proposed a new modified model toward the instant messenger applications adoption which has not been tested yet. This study intents to propose a measurement material to test the model. The material of measurement was derived from previous published researches. The method to test the measurement material was a pilot study with 30 Malaysians’ respondents. The result of this study reveals that the measurement material is valid and reliable, therefore it can be used for further study.
A Productivity Improvement of an Assembly Line through Line Balancing and Automated Work-Part Feeder
Authors: Ngamkala Weerawit , Prombanpong Suksan
Published: June 2017

The purpose of this paper is to improve line productivity using line balancing technique and a reduction of work variation using an automated part feeder. This is due to the fact that the conventional assembly line manually feeds a part on to the production line by a worker. The feeding cycle is not constant and varies from time to time. Thus, the production rate is not constant and varied by the worker feeding speed. In addition, the assembly line itself does not fully balance. The operation time of each station is not well designed; as a result, all of the stations but the bottle-neck one experience an idle time. The balance efficiency is only at 40.33 percent which means that 59.67 percent of the total production time is balanced delay. Once the automated feeding machine which a buffer is designed and implemented. The cycle time can be set at 6 sec. and with the line balance technique the operator can be reduced from 11 to 9 persons. As a result, the productivity is substantially increasing around 138 percent and the new balance efficiency is 85.12 percent.