bluuebunny/crossref_metadata_2025 huggingface dataset:
La place de l’ostéotomie courte en chirurgie orthognathique : avantages, inconvénients et perspectives
Authors: Bachelet Jean-Thomas , Adnot Jérôme , Termont Aurélien , Decaudaveine Suzanne , Paulus Christian
Published: June 2019

Introduction : L’ostéotomie courte évoquée par Blair en 1907 a été décrite et caractérisée par Kater et Paulus en 2013. Il s’agit d’une ostéotomie sus-spigienne oblique de dedans en dehors de haut en bas d’arrière en avant, visant à séparer le ramus en portion articulaire et portion angulo-mandibulaire, les deux valves osseuses étant maintenues en contact par une surface proportionnelle à l’angulation de l’ostéotomie. Matériels et Méthodes : Nous présentons, à travers une série de 82 patients, les avantages en termes de stabilité et de préservation de la sensibilité de cette technique. Résultats : Au total, 82 patients ont été inclus, 74 patients (90 %) ont décrit une sensibilité normale et huit patients (10 %) une sensibilité modifiée deux ans après la chirurgie. Discussion : L’ostéotomie courte permet, par la nature et la hauteur du trait d’ostéotomie, l’éviction de la manipulation directe du nerf alvéolaire inférieur. Elle est associée à un taux de sensibilité post-opératoire identique au pré-opératoire dans plus de 90 % des cas. Pour de bonnes indications, cette technique pourrait être utilisée de manière préférentielle afin d’optimiser la récupération nerveuse post-opératoire. Nous discuterons également les limites actuelles de cette technique de chirurgie orthognathique, ainsi que les perspectives en lien avec le développement de l’impression 3D et la planification pré-opératoire.
La spectroscopie Raman pour l’environnement marin
Authors: Tardivel Morgan , Colas Florent , Rinnert Emmanuel
Published: June 2019

L’analyse des composés chimiques est au coeur de nombreuses applications en sciences marines et environnementales : surveillance dans le cadre de la Directive cadre sur l’eau (Directive 2000/60/CE) et la Directive cadre stratégie milieu marin (2008/56/CE), études d’impact des activités industrielles marines, surveillance de l’état sanitaire des eaux et produits de la mer, études écosystémiques ou biogéochimiques...
Estimation of the multifractional function and the stability index of linear multifractional stable processes
Authors: Dang Thi-To-Nhu
Published: June 2019

In this paper we are interested in multifractional stable processes where the self-similarity index H becomes time-dependent, while the stability index α remains constant. Using β- negative power variations ( − 1∕2 < β < 0), we propose estimators for the value at a fixed time of the multifractional function H which satisfies an η-Hölder condition and for α in two cases: multifractional Brownian motion (α = 2) and linear multifractional stable motion (0 < α < 2). We get the consistency of our estimates for the underlying processes together with the rate of convergence.
Evaluation von Padua- und R.E.N.A.L.-Score hinsichtlich ihrer Aussagekraft und Implikationen auf das perioperative Management bei der partiellen Nephrektomie
Authors: Zinssius Daniel , Jünemann Klaus-Peter , Geiger Friedemann , Hamann Claudius , Seiler Felix , Osmonov Daniar
Published: June 2019

Hintergrund Chirurgische Indikationen zum Nierenerhalt werden aufgrund der rasanten Entwicklung der minimalinvasiven Nierenchirurgie viel breiter gestellt. Die aktuelle Literatur hierzu legt nahe, dass neben der Tumorgröße auch die genaue anatomische Lage des Tumors für die Wahl der bestmöglichen operativen Therapie des Patienten beachtet werden muss. Zur präoperativen Risikoeinschätzung werden häufig 2 Nephrometrie-Scores, der Padua- und der R.E.N.A.L.-Score, erhoben. Zur Frage, welcher Score die nierenerhaltende Operabilität eines Nierentumors am besten einschätzt und intra- oder postoperative Komplikationen besser vorhersagen kann, möchten wir anhand unseres Patientenkollektivs einen Beitrag leisten.

Material und Methoden Patientendaten von 117 Patienten, die sich von 2014 bis 2017 am Universitätsklinikum in Kiel einer Nierenteilresektion haben unterziehen müssen, wurden erfasst. Vorhandene Schnittbildgebung (Computertomografie und Magnetresonanztomografie) wurde retrospektiv nach Kriterien von Padua-, bzw. R.E.N.A.L.- Score ausgewertet. Es wurden die Fälle identifiziert, bei denen im Anschluss an den Versuch einer Nierenteilresektion eine radikale Nephrektomie durchgeführt wurde. Hierzu wurden Gruppenunterschiede in der Höhe der beiden Scores statistisch ausgewertet. Wir führten die Korrelationsanalysen zwischen der Höhe der beiden Scores und der Operationsdauer, intra- und postoperativen Komplikationen sowie Gesamtkomplikationen durch.

Ergebnisse Für den R.E.N.A.L-Score zeigten sich signifikant höhere Werte der Tumore (Mittelwertsdifferenz 1,059, p < 0,05), die im Anschluss an den Versuch einer Nierenteilresektion doch durch eine radikale Nephrektomie behandelt werden mussten (10 von 117). Zu beiden Scores konnte eine positive Korrelation mit OP-Dauer (für R.E.N.A.L.-Score: Korr.-Koeffizient 0,284, p < 0,05; für Padua-Score: Koeffizient 0,312, p < 0,05), intra- und postoperativen sowie Gesamtkomplikationen (für R.E.N.A.L.-Score: Korr.-Koeffizient 0,216, p < 0,05; für Padua-Score: Koeffizient 0,192, p < 0,05) gezeigt werden.

Schlussfolgerung Beide Scores dienen der Risikoeinschätzung vor Nierenteilresektion. Für unsere Patienten hätte die Anwendung des R.E.N.A.L.-Scores Vorteile geboten. Eine präoperative Nephrometrie ist sinnvoll und sollte neben der subjektiven Einschätzung des Operateurs zur Anwendung kommen. Uns fehlen bislang noch prospektive Studien zu diesem Thema.
50 Jahre Systemtherapie des Harnblasenkarzinoms
Authors: Retz Margitta , von Amsberg Gunhild , Horn Thomas , Gschwend Jürgen E. , Maisch Philipp
Published: June 2019

Dieser Übersichtsartikel stellt die Ergebnisse verschiedener Behandlungskonzepte für das metastasierte Urothelkarzinom in den letzten fünf Jahrzehnten zusammen. Mit der Einführung von verschiedenen Kombinations-Chemotherapien wurde ab Mitte der 80er Jahre eine signifikante Überlebensverlängerung und potenzielle Heilbarkeit auch fortgeschrittener Erkrankungsstadien in dieser Tumorentität postuliert. Vor zwei Jahren wurden Studiendaten zur Zweitlinientherapie des metastasierten Urothelkarzinoms mit dem PD1-Antikörper Pembrolizumab publiziert, die erstmals einen Vorteil im Gesamtüberleben gegenüber einer konventionellen Chemotherapie mit Paclitaxel, Docetaxel oder Vinflunin zeigen. Aktuell wird in randomisierten Phase-3-Studien der Einsatz von PD-1/PD-L1 gerichteten Substanzen auch in der Erstlinientherapie des metastasierten Urothelkarzinoms untersucht. Dabei werden verschiedene Therapiestrategien verfolgt: Monotherapien mit PD-1/PD-L1-Inhibitoren sowie deren Kombinationen mit CTLA-4-Inhibitoren oder konventioneller Chemotherapie. Es liegen bereits Daten aus einarmigen Phase-2-Studien zur Monotherapie vor. Erste Daten aus randomisierten Studien werden im Laufe des Jahres 2019 erwartet.
High Stereocontrol in the Preparation of Silyl-Protected γ-Substituted Enoldiazoacetates
Authors: Dong Kuiyong , Marichev Kostiantyn O. , Xu Xingfang , Doyle Michael P.
Published: June 2019

A robust and efficient synthesis of triisopropylsilyl (TIPS)-protected γ-substituted enoldiazoacetates with excellent Z stereocontrol by using lithium bis(trimethylsilyl)azanide (LiHMDS) as a base and TIPSOTf as a silyl transfer reagent is reported. Despite their increased size compared to previously tert-butyldimethylsilyl (TBS)-protected γ-unsubstituted enoldiazoacetates, a high product yield with exceptional stereocontrol has been achieved in copper-catalyzed [3+3] cycloaddition reaction with nitrones by using a chiral indeno bisoxazoline ligand.
Hydrogen-Borrowing Amination of Secondary Alcohols Promoted by a (Cyclopentadienone)iron Complex
Authors: Bai Xishan , Aiolfi Francesco , Cettolin Mattia , Piarulli Umberto , Dal Corso Alberto , Pignataro Luca , Gennari Cesare
Published: June 2019

Thanks to a highly active catalyst, the scope of the (cyclopentadienone)iron complex-promoted ‘hydrogen-borrowing’ (HB) amination has been expanded to secondary alcohols, which had previously been reported to react only in the presence of large amounts of co-catalysts. A range of cyclic and acyclic secondary alcohols were reacted with aromatic and aliphatic amines giving fair to excellent yields of the substitution products. The catalyst was also able to promote the cyclization of diols bearing a secondary alcohol group with primary amines to generate saturated N-heterocycles.
Inpatient Communication Networks: Leveraging Secure Text-Messaging Platforms to Gain Insight into Inpatient Communication Systems
Authors: Hagedorn Philip A. , Kirkendall Eric S. , Spooner S. Andrew , Mohan Vishnu
Published: June 2019

Objective This study attempts to characterize the inpatient communication network within a quaternary pediatric academic medical center by applying network analysis methods to secure text-messaging data.

Methods We used network graphing and statistical software to create network models of an inpatient communication system with secure text-messaging data from physicians, nurses, and other ancillary staff in an academic medical center. Descriptive statistics about the network, users within the network, and visualizations informed the team's understanding of the network and its components.

Results Analysis of messages exchanged over approximately 23 days revealed a large, scale-free network with 4,442 nodes and 59,913 edges. Quantitative description of user behavior (messages sent and received) and network metrics (i.e., importance of nodes within a network) revealed several operational and clinical roles both sending and receiving > 1,000 messages over this time period. While some of these nodes represented expected “dispatcher” roles in our inpatient system, others occupied important frontline clinical roles responsible for bedside clinical care.

Conclusion Quantitative and network analysis of secure text-messaging logs revealed several key operational and clinical roles at risk for alert fatigue and information overload. This analysis also revealed a communication network highly reliant on these key roles, meaning disruption to these individuals or their workflows could lead to dysfunction of the communication network. While secure text-messaging applications play increasingly important roles in facilitating inpatient communication, little is understood about the impact these systems have on health care providers. Developing methods to understand and optimize communication between inpatient providers might help operational and clinical leaders to proactively prevent poorly understood pitfalls associated with these systems and build resilient and effective communication structures.
Electrically tunable valley-dependent transport in strained silicene constrictions
Authors: Li Yuan , Jiang W. Q. , Ding G. Y. , Peng Y. Z. , Wen Z. C. , Wang G. Q. , Bai R. , Qian Z. H. , Xiao X. B. , Zhou G. H.
Published: June 2019

We adopt the tight-binding model and the mode-matching method to study the electrical modulation of the valley polarization in strained silicene constrictions. The effects of the potential energy, the external electric field, and the strain on the band structures and the transport property are investigated. The conductance shows a clear valley polarization and zero conductance in the absence of the electric field and the strain. It is found that the external electric field can open a clear bandgap and result in an extra zero conductance. However, the strain can not induce a bandgap, which only slightly change the energy band. Correspondingly, the strain has little effect on the system’s conductance. The transport behavior of zero conductance is elucidated in terms of band structures of the silicene constriction. Therefore, one can realize an effective modulation of the valley-dependent transport of the silicene constriction by combining the potential energy and the electric field. The electrical modulation of the valley polarization and zero conductance can be exploited for silicene-based valleytronics devices.
Shock wave induced cavitation of silicone oils
Authors: Huneault Justin , Higgins Andrew J.
Published: June 2019

The cavitation threshold of polydimethylsiloxane (silicone) oils was studied using the planar impact of flyer plates to generate large transient negative pressures within the liquids. The plate-impact experiments used a 64-mm-bore gas-gun to launch thin sabot-supported flyer plates onto liquid capsule targets in which a thin Mylar diaphragm formed a free surface at the back of the sample. The shock wave driven into the target capsule by the flyer impact placed the silicone oil in tension upon reflection from the rear free surface, eventually causing the sample to cavitate. The spall strength, or critical tension which cavitates the liquid, was determined by monitoring the free-surface velocity using a photonic Doppler velocimetry system. This study explored the effect of viscosity and loading strain rate on a system of three silicone oils having vastly different viscosities (4.8×10−2Pas to 2.9×101Pas), but otherwise similar properties. The spall strength was found to remain constant over the ranges of strain rate and viscosities probed in this work. A comparison of the experimental results to models for the cavitation threshold of liquids suggested that homogeneous nucleation of bubbles was the dominant mechanism for tension relief at the onset of cavitation.
Structural and magneto-dielectric anomalies in Mn-doped Bi2Fe4O9 nanograins
Authors: Shen Hui , Mei Fang , Lu Xiaomei , Lei Lin , Shao Ye , Wang Xiaomin , Huang Fengzhen , Zhu Jinsong
Published: June 2019

We attempt to modify the magnetoelectric properties of antiferromagnetic Bi2Fe4O9 nanograins by substituting multivalent Mn ions at Fe sites. The doped Bi2Fe4O9 nanograins are synthesized by a hydrothermal method with a different Mn content x (x is the mole ratio of Mn to Mn plus Fe; x = 0.00, 0.02, 0.04, 0.06, and 0.10). Among them, the x = 0.04 sample shows the anomalous decrease of lattice parameters a and b, the lowest antiferromagnetic transition temperature, and the largest saturated magnetization. Besides, the magneto-dielectric effect (Δɛ/ɛ ∼ −4.9%) and the magneto-striction constant (λ ∼ −1.1 × 10−4) of the x = 0.04 sample are also the largest compared with others (220 K and 0.6 T). Combined with Raman scattering and x-ray photoelectron measurement, it is considered that the substitution site of Mn ions varies with an increase of doping amount x, which also leads to the change of valence state of Mn ions and the lattice structure, and further affects the strength of magnetic interaction and spin-lattice coupling.
Parametric influence of film thickness and incident angle on resonance spectra of pre- and post-annealed Ga doped ZnO
Authors: Rajak Sukla , Banerjee Jayeta , Ray Mina
Published: June 2019

Here, we perform a theoretical investigation of the impact of film thickness and incident angle on the surface plasmon resonance spectra for annealed and postannealed Ga-doped ZnO (ZnO:Ga) in a 3-phase Kretschmann configuration. A detailed comparative study has been performed to determine the optimum configuration to be utilized for sensing applications. Though both films are found to support plasmonic excitation for thickness below 200 nm, detection accuracy and sensitivity calculations from the resonance plots simulated in the MATLAB environment reveal that the preference of one over the other should be in accordance with the concerned application.
Effects of irrigation and tillage on soil organic carbon and nutrients in mining-induced subsided cropland
Authors: Nie X. J. , Zhang H. B. , Li S. Y.
Published: June 2019

Little is known about the effect of field management on soil quality in mining subsidence landscapes. In this study, we selected subsided cropland from the Jiaozuo coal mining district, China, to determine the effects of irrigation and tillage on soil organic carbon (SOC) and nutrients. Irrigation and tillage differentially affected the dynamics of SOC, total nitrogen (N) and total phosphorus (P) in subsided cropland at 15–18 years after surface subsidence. Tillage along a longitudinal slope-direction induced greater depletions of SOC, N and P stocks in subsided cropland compared with tillage along a transverse slope-direction (TT). These parameters were also more depleted under rainfed than under irrigated conditions. The distribution of SOC, total N and total P was related to soil redistribution by soil erosion in subsided cropland. Integrated irrigation-TT management reduced the within-field variations in SOC, total N and total P, and irrigation reduced within-field variation in SOC. These results indicate the effects of tillage and irrigation on soil erosion and subsequently on SOC and nutrients in subsided cropland. Practicing tillage over great subsidence gradients is detrimental to soil conservation. Combining small subsidence gradients with irrigation may be an alternative to traditional engineering reclamation of subsided cropland.
Open Hand Prone as a resource in multimodal claims to interruption
Authors: Kamunen Antti
Published: June 2019

This paper examines the Open Hand Prone ‘vertical palm’ as a resource for participants in conversation for displaying their treatment of a co-participant’s – or their own – turn/action as interruptive. Through this practice participants can manage turn-taking by making it relevant for the co-participant to stop talking. The data for this study consist of video-recorded conversations in English and Finnish from domestic and institutional settings, as well as broadcast talk. Using multimodal conversation analysis, this study shows that the gesture occurs in situations involving overlapping/competitive talk or incompatible embodied activities that somehow affect the progressivity of the ongoing talk. This paper complements previous research on gesture studies and interaction by investigating the function these gestures take in stopping/interrupting a co-participant’s turn-at-talk across multiple settings, and by studying how the gesture functions as a part of a practice which has direct social consequences on the local organization of turn-taking.
Periodical codes and translation
Authors: Tahir Gürçağlar Şehnaz
Published: June 2019

This article discusses the relevance of periodical codes, an analytical framework that has been
developing in the nascent field of periodical studies, for translation research. It explores how using periodical codes as
heuristic tools can be instrumental in shedding light on the role of translation in the making of a magazine’s common habitus in a
historical context. It presents a case study on the Turkish literary and cultural magazine Varlık, which began
publication in 1933 and is still in existence. It offers a quantitative and qualitative
analysis on the position of translation in the magazine, highlighting the way it contributed to the creation of particular forms
of internal and external dialogics. Special emphasis is placed on compositional and social codes of Varlık and
the way translation has been instrumental in shaping both.
The use of corpora in legal and institutional translation studies
Authors: Prieto Ramos Fernando
Published: June 2019

Research in legal and institutional translation within the realm of Legal Translation Studies (LTS) has greatly benefited from embracing the advances of Corpus Linguistics in the past few decades. This paper provides an overview of corpus-based approaches in LTS and illustrates their increasing prominence and sophistication through the description of seven selected representative projects, including a wide range of corpus types, translation contexts, legal genres, jurisdictions, sizes and languages. The comparative examination of these studies confirms the relevance of corpus methods for LTS, the need to integrate quantitative and qualitative considerations (crucially including legal parameters) into corpus-building criteria, as well as the correlation between research scope and methodological nuance in ensuring corpus suitability.
Procuração/power of attorney
Authors: Passos e Sousa Marques Afonso Tereza , do Céu Henriques de Bastos Maria
Published: June 2019

This paper presents a contrastive legal and corpus-based linguistic and terminological analysis to translate a
common legal instrument on a global scale, the power of attorney in English or procuração in Portuguese. This
usually takes the shape of a written document, granted before a notary public as required by law, allowing one person to appoint
another person to act on his/her behalf. Civil law and common law systems differ considerably with respect to requirements,
formalities and range of powers permitted. In cross-border transactions, a translation is required to certify the authority given
to third parties who do not speak the language. Bearing this in mind, a comparable corpus of authentic Portuguese and British
texts (from England and Wales, and Northern Ireland) pertaining to this legal genre (12 procurações and 24 PoA)
is analysed to identify its characteristics at functional, situational, thematic, lexical and grammatical levels.
Modular and extensible lesson on optical fibre communication for youths
Authors: Wong Nicholas H L , Tong Amy S K , Posner Matthew T
Published: June 2019

Optical fibre communication enables the global internet, but few youths ever learn about how it works, even at a basic level, until tertiary education. While some middle school curricula might include simple geometrical optics concepts like reflection and refraction, they often lack contextual linkage to worldwide telecommunications. Through our studies, we have found that students are more engaged in the learning process when the material directly relates to real life. To address this gap, and moreover to tackle the issue of the STEM skills shortage, we have designed a self-contained lesson to introduce youths to this topic. It is modularised into three parts, beginning with using light to communicate Morse code, and then covering advanced themes such as multiplexing and fibre guidance based on total internal reflection. The modules can be taught sequentially or individually depending on educational level. They emphasise a more phenomenological than theoretical approach and include hands-on activities using easily obtainable materials. We outline the lesson and pedagogical guidelines for classroom settings, as well as evaluate actual classes run. This lesson can be flexibly implemented in formal classes or through educational outreach programmes.
Simulation of impedance changes with a FEM model of a myelinated nerve fibre
Authors: Tarotin Ilya , Aristovich Kirill , Holder David
Published: June 2019

Objective. Fast neural electrical impedance tomography (EIT) is a method which permits imaging of neuronal activity in nerves by measuring the associated impedance changes (dZ). Due to the small magnitudes of dZ signals, EIT parameters require optimization, which can be done using in silico modelling: apart from predicting the best parameters for imaging, it can also help to validate experimental data and explain the nature of the observed dZ. This has previously been completed for unmyelinated fibres, but an extension to myelinated fibres is required for the development of a full nerve model which could aid imaging neuronal traffic at the fascicular level and optimise neuromodulation of the supplied internal organs to treat various diseases. Approach. An active finite element method (FEM) model of a myelinated fibre coupled with external space was developed. A spatial dimension was added to the experimentally validated space-clamped model of a human sensory fibre using the double cable paradigm. Electrical parameters of the model were changed so that nodal and internodal membrane potential as well as propagation velocity agreed with experimental values. Impedance changes were simulated during activity under various conditions and the optimal parameters for imaging were determined. Main results. When using AC, dZ could be recorded only at frequencies above 4 kHz, which is supported by experimental data. Optimal bandwidths for dZ measurement were found to increase with AC frequency. Significance. The novel fully bi-directionally coupled FEM model of a myelinated fibre was able to optimize EIT for myelinated fibres and explain the biophysical basis of the measured signals.
The robotic telescopes system for GRB optical follow-up in Timau National Observatory
Authors: Danarianto M D , Saputra M B
Published: June 2019

The occurrence of Gamma Ray Bursts (GRBs) is yet unpredictable. Thus, follow-up observations to find its optical counterpart should be made as quickly as possible after the first detection, as well as kept being monitored on the observable area. In Southeast Asia region, two new robotic 50-cm telescopes system will be placed in Timau National Observatory, East Nusa Tenggara, Indonesia, which has about 70% of clear sky fraction with low-latitude sky coverage. In this manuscript, the possibility of implementing the system for GRB follow-up is discussed, followed by its future prospects as a multi-messenger optical follow-up robotic telescope. The current properties and status of the system are also described.
Twenty years of the Gunma Astronomical Observatory, experimental trials of how to use a 1.5-m telescope at a public observatory
Authors: Hashimoto O , Malasan H L
Published: June 2019

Gunma Astronomical Observatory (GAO) is regarded as a pioneer of the public observatories equipped with a large telescope of far beyond one meter class. It was established in 1999 by Gunma prefecture local government. Its main telescope is a 150-cm reflector which has an eyepiece system for the star gazing by public people in addition to advanced measuring instruments such as a very powerful high resolution spectrograph for the scientific research. Using this telescope we have carried out a number of activities and studies in the fields of scientific research, education and public outreach. Many of them were kinds of experimental trials of how to use such a telescope at a public observatory. We present some examples of our experiences in these two decades.
The Measurement of Solar Differential Rotation from Proper Motion of Individual Sunspots
Authors: Permata K , Herdiwijaya D
Published: June 2019

The differential rotation is the result of the interaction between rotation and convection and causes dynamo circulation that affect the cycle of solar activity. Tracer method using features in the photosphere such as sunspot is a simple method to measure the differential rotation. In this study, 98 individual sunspots on January 8 - 22, 2013 and August 25 - September 7, 2013 were used to measure the differential rotation of the Sun. The Sun’s continuum images were obtained from HMI (Helioseismic Magnetic Imager) instrument at SDO (Solar Dynamic Observatory). Coordinate and area of sunspot were measured using ImageJ software and converted to Carrington coordinates. From the measurement, we derived the differential rotation equation, the relation of velocity and area of sunspot, and the relation of sunspot’s velocity and Zurich classification. The differential rotation equation obtained in this study is ω (B) = (14.376 ± 0.04) + (0.6 ± 0.38) sin2B (°/day). For the relation between velocity and area of sunspot, we got the sidereal rotation rate of sunspots with area < 100 pixels2 is about 0.8% higher than sunspots with area > 100 pixels2.
An Application of The Markov Chain Monte Carlo (MCMC) Method to Open Cluster Membership Determination
Authors: Hidayat Y A , Arifyanto M I , Aprilia  , Hakim M I
Published: June 2019

The determination of membership in open clusters will be more difficult than determination membership of the globular clusters. This is due to the location of open clusters which located on the galactic disk. From that location, when observing open clusters, it will be observed foreground and background stars also. Determination of membership in cluster could be done by calculating the probability of a star becoming a cluster member. We used double elliptic bivariate Gaussian function to represent the population of cluster and field stars in the region. The function has eleven parameters and solved by using Markov Chain Monte Carlo (MCMC). The Metropolis-Hastings algorithm is used in this works to obtain the probability of open cluster membership. We used astrometric data from GAIA Data Release 2 for two open clusters which their membership are to be determined i.e. IC 1590 and NGC 2262. Our result is nearly in accordance with the MWSC II catalogue. After the cluster membership is obtained, the physical parameters of the two clusters using isochrones fitting from [1] are the distance(pc) 2200 and 2366, reddening(mag) 0.728 and 0.830, distance modulus(mag) 12.210 and 12.438 also log age 6.895 and 8.995, respectively for IC 1590 and NGC 2262.
An improved technique of finding the coefficient of rolling friction by inclined plane method
Authors: Ciornei F C , Pentiuc R D , Alaci S , Romanu I C , Siretean S T , Ciornei M C
Published: June 2019

During the design process the mechanical engineer faces a challenge: the choice of the tribological parameters. Even most influential technical references offer ranges for the frictional characteristics. An emblematic example is the coefficient of rolling friction (CRF). The handiest solution in establishing the correct value of the CRF for a certain contact is to find it experimentally. One of the methods is the inclined plane manner. The weak point of the method consists in the particularly small values of the slope required to evidence the effect of rolling friction. The present work shows a technique for finding the CRF. The principle of the method consists in considering both the slope of the inclined plane and the torque of rolling friction as unknowns. The two parameters can be established by experimental finding of the acceleration of an axi-symmetric body, both for ascending and descending motions.
Optimal design through the utility function parameterization method on electromechanical actuators
Authors: Coteţiu R I , Moldovan A , Alexandrescu I M , Năsui V
Published: June 2019

This paper presents an analytical and computer aided procedure for the multicriteria design optimization of the electromechanical actuator. The constraints are defined to find the basic constructive parameters which defined have to by simultaneous optimized through objectively severe functions. For the defined to find the multi-criteria optimization model of the electromechanical actuator a computer program based in interactive dialogue in developed in an algorithm. The results of the program are presented considering a multicriteria optimization algorithm of the new electromechanical actuator.
Mono-axial tracking system for parabolic trough collector
Authors: Ciobanu D , Enescu M , Jaliu C
Published: June 2019

Increased living standards in the developed countries lead to increased energy consumption. By using renewable energy, the fossil fuel consumption and greenhouse gas effect are reduced. The main source of renewable energy is the sun that can be used to produce the thermal energy or electric energy. The concentrating collectors are used to obtain both heat and electricity. The most common and used concentrating collectors are the parabolic trough collectors due to their advantages, such as: lower price, use of mono-axial tracking systems, simple maintenance. Parabolic trough collectors can have orientation around the N-S axis or E-W axis. In the case of N-S orientation, the angular stroke is higher than 120°, and in case of E-W orientation, the angular stroke that the tracking system has to ensure is less than 100°. The mechanisms used to orientate these collectors are using gears, cam or chain transmission. The paper presents a new type of mono-axial tracking system with linear actuators that has the advantages of assuring the required angular stroke, a high orientation accuracy and lower price.
Aspects of the technological transfer management for capitalizing on the results obtained through scientific research
Authors: Torcătoru C
Published: June 2019

This paper attempts to provide answers to the problems currently facing higher technical education and research, focusing on technology transfer system. To this end, is defined the concept of innovation and technology transfer and are presented some aspects of the technology transfer mechanisms. Some visions on transfer management are detailed, and several procedures are propose to improve technology transfer between educational institutions and socio-economic environments. It should be borne in mind that there are problems with the students’ novelty, diploma and dissertation papers. Therefore, university policies on intellectual property knowledge should include the acquisition of knowledge in the last years of study.
Novel solutions for actuation of an above elbow prosthesis
Authors: Lovasz EC , Gruescu CM , Sticlaru C , Moldovan CE , Stoian M
Published: June 2019

The above elbow prosthesis must provide the movement of the elbow, which naturally is composed by a flexion – extension movement. The mechanical system must fulfil a set of conditions regarding kinematics, dynamics, precision, size and load. The paper describes two novel solutions to generate the flexion – extension movement of the elbow. The description contains the kinematic scheme, elements of calculus and the CAD generated constructive solution.
Evaluation of Ration Based on Soy Sauce By-Product on Addition of Acacia and Chestnut Tannin: An In Vitro Study
Authors: Sadarman  , Ridla Muhammad , Nahrowi  , Sujarnoko Tekad U.P. , Ridwan Roni , Jayanegara Anuraga
Published: June 2019

Feed is a main challenge for a livestock farm, especially during dry season when feed production is low. Such condition may cause low livestock productivity due to insufficient nutrient intake. Provision of high quality forages from grasses and legumes are limited by land competition for various developmental reasons. Therefore, an opportunity to provide feed for livestock is through utilization of agroindustrial by-products such as soy sauce by-product. The objective of the present study was to evaluate soy sauce by-product on addition of tannins, i.e., Acacia mangium Wild. (AT) and chestnut tannin (CT) using an in vitro rumen fermentation technique. The following treatments were tested: soy sauce by-product as control (R1), soy sauce by-product + 1% AT (R2), soy sauce by-product + 2% AT (R3), soy sauce by-product + 1% CT (R4) and soy sauce by-product + 2% CT (R5). The treatments were incubated in vitro with buffered-rumen fluid in four replicates, represented by three incubation units per replicate, and conducted for 24 h at 39 °C. Parameters measured in this research were in vitro gas production at regular time point intervals. Other parameters measured after the incubation were dry matter degradation, organic matter degradation, total volatile fatty acids (VFA), ammonia (NH3) and pH. Data were tested using analysis of variance (ANOVA), if there was a significant different at P<0.05 then continued with Duncan’s multiple range test. The results of this study showed that the addition of tannins, both acacia and chestnuts, had no significant effect (p>0.05) to dry matter degradation, organic matter degradation, total volatile fatty acids (tVFA), NH3 and pH. Acacia tannin was able to influence (p<0.05) the accumulation of gas production at 8, 12 and 24 h. It can be concluded that the addition of tannin, both acacia and chestnuts up to level 2% does not interfere with the fermentation process of soy sauce by-product in the rumen an in vitro.
Identification of Local Isolate of Microalgae Chlorella Vulgaris using Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase Large Subunit (rbcL) Gene
Authors: Yanuhar Uun , Caesar Nico Rahman , Musa Muhammad
Published: June 2019

Identification of microalgae has relied on microscopic observation which is time-consuming and high accuracy requiring. Molecular identification provides a solution to identify microalgae accurately and quickly. This study aims to identify locally isolated of Chlorella vulgaris by using rbcL gene. The study used exploration methods. The sample was C. vulgaris obtained from the local region in Situbondo, Indonesia. C. vulgaris DNA was isolated using the kit Zymo Research Plant. The C. vulgaris DNA was amplificated by PCR using rbcL gene primer then the sequencing of the PCR product was conducted. Phylogenetic analysis was conducted using the MEGA6 software. Research shows that DNA sequences were located at 593bp. After compared with the Chlorella sequences data in the GenBank using BLAST methods, it shows similarities of 88-99% and E-value of 0.0. The phylogenetic reconstruction shows that the local C. vulgaris with code STB01 was clade with another C. vulgaris, the population originates from a common ancestor. Although all population groups are separated by ecogeography. Each population was still genetically similar to short distance among populations. Molecular identification of local C. vulgaris was successfully carried out using primers rbcl and local isolate C. vulgaris have a genetic similarity of 99% with C. vulgaris in others region in the world.
Liquid Impedance Analyser for Glucose Concentration in Water using Resonance Model
Authors: Akbar Muchammad A. , Rianto Sugeng , Sakti Setyawan P.
Published: June 2019

Liquid impedance measurement systems are widely developed as a promised method for analyte detection. The system was using a capacitive model. The object was modeled as a capacitance which then related to the analyte permeability. In this study, a full impedance model formed from the capacitance, inductance and resistance property of the analyte was used. The model which then called an RLC model was constructed in which the analyte properties affect the capacitance, inductance and resistance value of the model at any given frequency. A resonance frequency of the model was exists based on the resistance, capacitance and inductance value. A mixture of water and glucose was used as a measurement model. The impedance spectrum of the RLC model was related to the glucose concentration in water. It was found that the resonance frequency of the system.
Design and Performance of Ethanol Purification Tests Using Poly Ether Sulfone Composite Membrane in The Membrane Pervaporation Process
Authors: Hendrawan Yusuf , Yuliantini Effendie Oktarina Eka , Lastriyanto Anang , Argo Bambang Dwi , Wibisono Yusuf
Published: June 2019

The pervaporation process in the context of ethanol purification is a promising and rapidly developing technology. This is supported by various advantages possessed by pervaporation i.e. do not need additional chemicals, the process is simpler, and does not cause environmental pollution. The purpose of this research is to test the performance of pervaporation design and determine the optimal conditions in the ethanol purification process using a poly-ether-sulfone composite membrane with a coating of 3% alginate & 3% chitosan. This study used two treatments. The first treatment is the temperature of pre-heating in the feed section consisting of 63.64, 67.83, and 72.01 °C. The second treatment is a downstream pressure consisting of 41.325, 46.325, and 51.325 abs kPa. The process was carried out for 40 minutes with a batch system and ethanol feed concentration of 68.05% (w/t). The results showed the highest ethanol concentration was obtained at operating conditions pre heating feed 72.01 °C and downstream pressure of 51.325 abs kPa with ethanol concentration of 82.84% (w/t). The best conditions will be controlled using a non-coating composite membrane and the increase in ethanol concentration in the permeate section is 76.34% (w/t).
Estimation of Simultaneous System of Spatial Dynamic Equation Models with Spatially Corrected Blundell Bond Method of Moment (SCBB-GMM)
Authors: Mala Faiqotul , Fitriani Rahma , Nurjannah
Published: June 2019

The purpose of this paper is used to estimate spatial dynamic simultaneous equations models with simultaneous effects, spatial effects, and time lag effects. Spatial interactions are presented by spatial weight matrices and in addition to dynamics in space and time. Many variables commonly have two direction relationships. Two directions relationship of mutual influence can be summarized in a system of simultaneous equations. In other ways, the relationships of variables are dynamic. In the dynamic panel data models, there is a lag of dependent variable that caused the OLS estimates to be biased and inconsistent. First difference and instrumental variable are needed to overcome this problem. Estimation of parameters in spatial dynamic panel data models with Spatially Corrected Blundell Bond using principles of Generalized Method of Moment (GMM). SCBB-GMM with optimal weights produce parameters that are unbiased, consistent, and efficient
Multi-path signal decomposition with white-noise and correlation analysis
Authors: Naba Agus , Herwiningsih Sri , Harsono Heru
Published: June 2019

Decomposition of composite multi-path signals is a complex problem. The windowing approach in the time domain cannot be used for overlapping signals. While the filtering approach in the frequency domain cannot separate the overlapping signal spectrum. One of the key solutions to this problem is to estimate the time-delay for each signal component. This study discusses techniques for separating multi-path signal components through time-delay estimation by analysing residual signal and its correlation with original signal. The residual signal is the error between the reference and the received signal. Overlapping multi-path signal components are detected in two different approaches. First, when the residual signal is random, the whiteness analysis is applied to detect the signal component. Second, when the whiteness test failed, which means the residual signal has a correlation with the reference signal, the correlation test can then be applied. The simulation results show that this proposed method successfully detected the signal components.
Preparation and characterization of cellulose biofilm from coastal pandanus (Pandanus odorifer) leaves
Authors: Falahudin Aswin , Melati Putjha , Herlina  , Mailiza Agus , Adfa Morina , Gustian Irfan , Salprima Yudha S
Published: June 2019

The main objective of this report is the preparation and characterization of cellulose biofilm from coastal pandanus (Pandanus odorifer) leaves. The first experiment parts is the preparation of coastal pandanus leaves biofilm using a simple dissolution method followed by casting evaporation technique. Further experiments are the characterization of the produced biofilm using Scanning Electron Microscopy (SEM) in order to investigate the morphology of biofilms of pandanus leaves and Energy Dispersive X-ray (EDX) analysis to detemine their main composition. In addition, Fourier Transform Infra-Red (FT-IR) spectroscopy analysis was carried out to compare the main functional groups in the coastal pandanus leaves against to the corresponding biofilm. The SEM analysis shows that, the coastal pandanus cellulose biofilm has almost homogenous morphology. The EDX analysis shows te main elements in the corresponding films were carbon and oxygen (48.19% mass and 38.42% mass, respectively). Based on the FTIR observation, the use of TFA as solvent has impact to functional groups stability of the raw material.
Preparation and Characterization of Silica-Carrageenan Adsorbent for Pb2+ and Cd2+as Interfering Ion
Authors: Maharani Chariztya Anggita , Budiasih Endang , Wonorahardjo Surjani
Published: June 2019

Pb2+ and Cd2+ are poisonous heavy metal ions produced by industrial waste. Waste processing is always required before such material is released into the environment. A safe biomaterial such as silica-carrageenan was designed for the heavy metal adsorbent. The objectives of this research were to prepare and characterize silica-carrageenan adsorbent as well as testing them in some applications, by thin layer chromatography as well as in batch methods. Adsorption profiles of the two heavy metal ions were expected. The result showed that this material contained 1.10 g/cm3 density, 2.10% moisture level, 81.70% ash level, and iodine adsorption value of 21.80%. SEM pictures showed the homogeneous structures with globular particle shape below 100 nm dimension. FT-IR spectra showed the presence of the siloxane groups (≡Si-O≡), silanols (≡Si-OH-), and -OH groups from carrageenan. Both ions could not be eluted by all of the organic eluents on TLC plates of the material, but less than 50% of Pb(II) can be separated. This adsorption value decreased in the presence of Cd(II) in the silica-carrageenan system in batch method.
Characterization of Zirconium-Based Material (ZBM) Synthesized by Gradual Drying for Molybdenum-99 (99Mo) Adsorbent
Authors: Munir Miftakhul , Sarmini E , Herlina  , Sriyono  , Saptiama I , Billah A A
Published: June 2019

Technetium-99m (99mTc), the daughter radionuclide of Molybdenum-99 (99Mo), is the most widely used radionuclide in the world and predicted to face a shortage in the future. A Zirconium-based material(ZBM) is an alternative solution to overcome this problem due to its high adsorption capacity toward 99Mo, and ability to release 99mTc. The performance of the ZBM is influenced by its material properties, especially the surface area and pore diameter. This study aims to characterize and evaluate the ZBM developed by new synthesis method. The ZBM was synthesized using zirconium(IV) chloride, 2-propanol, water and tetrahydrofuran. The drying process after synthesis was conducted by gradual heating. The resulting material was analysed by XRD, SEM, and BET method. The 99Mo adsorption and 99mTc releasing capacity was also evaluated. The analysis result shows that the ZBM is an amorphous material, while its surface area, pore volume, and pore diameter was 45.8 m2/g, 0.19 cm3/g, and 16.29 nm, respectively. The 99Mo adsorption, and 99mTc releasing capacity of the ZBM was 181.58 mg Mo/g ZBM, and 91.81%, respectively.
Chemical composition, chitin and cell wall nitrogen content of Black Soldier Fly (Hermetia illucens) larvae after physical and biological treatment
Authors: Nafisah Ainun , Nahrowi  , Mutia Rita , Jayanegara Anuraga
Published: June 2019

The use of insects as feed may provide a potential solution to overcome the increasingly limited supply of feed, especially protein sources. Black soldier fly (BSF, Hermetia illucens) larvae is characterized by its easy production system, rapid growth, able to efficiently convert organic waste and contains high protein, i.e., around 40%. However, the BSF exoskeleton contains chitin which is a component of cell wall and may inhibit the process of nutrient utilization in the digestive tract of ruminants. This experiment aimed to reduce chitin in BSF through physical (separation of the exoskeleton part) and biological (fermentation with chitinolytic bacteria) treatments. There are four treatments tested in this study: BSF larvae control (T1), BSF larvae without exoskeleton (T2), fish meal (T3), fermented BSF larvae using Bacillus subtilis ATCC 19659 (T4).Physical and biological treatments were able to reduce crude fiber content from 20.27% (T1) to 4.29% (T2), 13.18% (T4), and there was a decrease in ADF content up to 21.78% (T2) and 19.69% (T4). Bacillus subtilis also had lipase enzyme activity, so it can reduce ether extract in BSF larvae by 25.83%. The value of deacetylation degree from chitin isolated without treatment (T1) had a higher value of 66.11. This shows that the fermentation process using chitinolytic bacteria is able to reduce the quality of chitin and change the characteristics of chitin. It can be concluded that physical and biological treatment of BSF prepupa larvae can reduce chitin content, which is indicated by a decrease in crude fiber and fiber fraction (NDF and ADF). Fermentation using chitinolytic bacteria can change chitin characteristics and affect chitin quality.