bluuebunny/crossref_metadata_2025 huggingface dataset:
The Postdoc Queue: A Labour Force in Waiting
Authors: Andalib Maryam A. , Ghaffarzadegan Navid , Larson Richard C.
Published: March 2018

Postdoctoral fellows (postdocs) comprise a large sector of the US scientific workforce. A substantial majority of postdocs are in a holding pattern, seeking tenure‐track assistant professorships. We model the postdoc population as a labour force in waiting—in queue. Postdocs enter the queue as they start their first postdoctoral appointment, and they leave in one of two ways: (i) obtaining the ‘queue service’ desired by the majority of postdocs, that is, an assistant professorship, or (2) reneging from the queue and seeking other positions. Using recent data from the US Survey of Doctorate Recipients, we show that the postdoc queue is one of those rare queueing systems where most of the queuers eventually renege rather than receive service. We find that only about 17% of postdocs ultimately land tenure‐track positions. The mean time in queue (postdoc career length) is 2.9 years, with significant variations across disciplines. We discuss policy implications. © 2018 John Wiley & Sons, Ltd.
Reduction Behavior of Aluminate Calcium Ferrite (CFA) in CO‐N2 Atmosphere
Authors: Xuan Senwei , Lv Xuewei , Ding Chengyi , Tang Kai , Li Gang , Pei Guishang , Wu Shanshan
Published: March 2018

Calcium ferrite (CF) is the significant liquid phase for fluxed sinters, which are the main iron‐bearing materials charged into a blast furnace. The isothermal reduction kinetics of CaO–Fe2O3 (0, 2, 4, and 8 wt%)–Al2O3 (CF, CF2A, CF4A, and CF8A) by CO at 1073, 1123, 1173, and 1223 K are investigated by thermogravimetric analysis in this study. Results indicate that temperature exerts more influence on the reduction degree of ternary CaO–Fe2O3–Al2O3 system than alumina content. The reduction processes of CF, CF2A, CF4A, and CF8A are mainly expressed as a typical two‐stage reaction. The apparent activation energies of the reduction of CF, CF2A, CF4A, and CF8A are 43.6, 97.9, 87.7, and 82.9 kJ mol−1, respectively, based on the model‐free method. According to Sharp analysis, the reduction of CF is described by the Avrami‐Erofeev equation with 2D reaction, that of CF2A and CF4A is expressed initially with 2D reaction and then by the 2D phase boundary controlled reaction, and that of CF8A is controlled by 3D reaction.
Pesto: Automated migration of DOM‐based Web tests towards the visual approach
Authors: Leotta Maurizio , Stocco Andrea , Ricca Filippo , Tonella Paolo
Published: March 2018

Test automation tools are widely adopted for testing complex Web applications. Three generations of tools exist: first, based on screen coordinates; second, based on DOM–based commands; and third, based on visual image recognition. In our previous work, we proposed Pesto, a tool able to migrate second‐generation Selenium WebDriver test suites towards third‐generation Sikuli ones. In this work, we extend Pesto to manage Web elements having (1) complex visual interactions and (2) multiple visual appearances. Pesto relies on aspect‐oriented programming, computer vision, and code transformations. Our new improved tool has been evaluated on two Web test suites developed by an independent tester. Experimental results show that Pesto manages and transforms correctly test suites with Web elements having complex visual interactions and multistate elements. By using Pesto, the migration of existing DOM–based test suites to the visual approach requires a low manual effort, since our approach proved to be very accurate.
Classic Grounded Theory—The Latest Version: Interpretation of Classic Grounded Theory as a Meta‐Theory for Research
Authors: Konecki Krzysztof T.
Published: March 2018

In this paper, I critically and analytically describe the book Classic Grounded Theory: Applications with Qualitative and Quantitative Data (Holton and Walsh 2017). I also offer reflections on the development of grounded theory methodology, and on the (in)consistencies of its procedures and epistemological assumptions. Finally, I offer some possibilities for developing classic grounded theory based on the proposals included in the book.
Smoking cessation treatment outcomes among people with and without mental and substance use disorders: An observational real-world study
Authors: Castaldelli-Maia João Mauricio , Loreto Aline Rodrigues , Guimarães-Pereira Bruna Beatriz Sales , Carvalho Carlos Felipe Cavalcanti , Gil Felipe , Frallonardo Fernanda Piotto , Ismael Flávia , Andrade Arthur Guerra de , Ventriglio Antonio , Richter Kimber P. , Bhugra Dinesh
Published: March 2018

Background:

There is a lack of studies evaluating smoking cessation treatment protocols which include people with and without mental and substance use disorders (MSUD), and which allows for individuals with MSUD undergoing their psychiatric treatment.

Methods:

We compared treatment success between participants with (n = 277) and without (n = 419) MSUD among patients in a 6-week treatment provided by a Brazilian Psychosocial Care Center (CAPS) from 2007 to 2013. Sociodemographic, medical and tobacco use characteristics were assessed at baseline. Tobacco treatment consisted of 1) group cognitive behavior therapy, which included people with and without MSUD in the same groups, and 2) pharmacotherapy, which could include either nicotine patches, nicotine gum, bupropion or nortriptyline. For participants with MSUD, tobacco treatment was integrated into their ongoing mental health treatment. The main outcome was 30-day point prevalence abstinence, measured at last day of treatment.

Results:

Abstinence rates did not differ significantly between participants with and without MSUD (31.1% and 34.4%, respectively). Variables that were significantly associated with treatment success included years smoking, the Heaviness of Smoking Index, and use of nicotine patch or bupropion.

Conclusions:

The inclusion of individuals with and without MSUD in the same protocol, allowing for individuals with MSUD undergoing their psychiatric treatment, generates at least comparable success rates between the groups. Predictors of treatment success were similar to those found in the general population. Facilities that treat patients with MSUD should treat tobacco use in order to reduce the disparities in morbidity and mortality experienced by this population.
Olfactory function and neurocognitive outcomes in old age: The Atherosclerosis Risk in Communities Neurocognitive Study
Authors: Palta Priya , Chen Honglei , Deal Jennifer A. , Sharrett A. Richey , Gross Alden , Knopman David , Griswold Michael , Heiss Gerardo , Mosley Thomas H.
Published: March 2018

Introduction

We tested the hypothesis that poor sense of smell is associated with lower cognitive function and higher mild cognitive impairment (MCI) prevalence.

Methods

Olfaction, measured by the Sniffin' Sticks test, was categorized as olfactory impairment (OI) (score ≤6) or no OI (score >6). MCI was adjudicated based on review of a neuropsychological examination. Linear regression estimated the mean difference in cognitive factor scores, and log‐binomial regression quantified MCI prevalence among participants with versus without OI.

Results

Participants with OI had lower mean factor scores (memory: −0.27 standard deviation [SD], 95% confidence interval [CI]: −0.35 to −0.19; language: −0.24 SD, 95% CI: −0.30 to −0.17; executive function/processing speed: −0.09 SD, 95% CI: −0.12 to −0.06; and general cognitive performance: −0.25 SD, 95% CI: −0.30 to −0.20). OI was also associated with MCI (n = 204; prevalence ratio = 1.56, 95% CI: 1.37, 1.78).

Discussion

An impaired sense of smell may serve as a readily accessible early marker of neurodegeneration and improve upon the prevailing delayed diagnoses and underascertainment of MCI/dementia.
The Effects of Partner Presence and Sexual Stimulation on the Appraisal of Vaginal Pressure and Sexual Arousal
Authors: Dewitte Marieke , Schepers Jan , Melles Reinhilde
Published: March 2018

Background

Sex research lacks experimental studies in which both partners participate in a laboratory procedure. This is relevant in the context of genital pain because painful vaginal sensations often occur in the presence of the partner.

Aim

To examine the effects of partner presence, sexual stimulation, and vaginal pressure on the appraisal of vaginal sensations and sexual arousal, ultimately aiming to increase the ecologic validity of laboratory designs.

Methods

A community sample of 42 women and their male partners watched sexual and neutral films while separated or together. We induced gradually increasing vaginal pressure in the women using an intravaginal inflatable rubber balloon.

Outcomes

Women reported on pleasant and painful vaginal pressure and perceived genital arousal. Men and women reported on subjective sexual arousal. We also examined whether these appraisals were moderated by relationship satisfaction.

Results

The appraisal of vaginal pressure varied as a function of relationship satisfaction. Less satisfied women reported more painful pressure than women who were highly satisfied and highly satisfied women appraised the pressure as more pleasant in the context of a sex film and in the presence (vs absence) of their partner. In men and women, although partner presence had a negative effect on subjective sexual arousal, the presence of the partner did increase women's perception of genital arousal when vaginal pressure was induced during a sex film, particularly when women felt highly satisfied with their relationship. Also, the effects on subjective sexual arousal were moderated by relationship satisfaction. For couples in which the woman was less satisfied, the induction of vaginal pressure resulted in higher subjective sexual arousal when the partner was absent compared with when he was present, whereas when the man felt less satisfied, partner presence had a positive effect on sexual arousal.

Clinical Implications

Interventions need to focus on the importance of sexual arousal during vaginal pressure stimulation and the way this is shaped by partner and relationship variables. Our results indicate that enhancing the relationship climate is an important target of intervention.

Strengths and Limitations

We did not include physical indices of genital arousal and did not use a clinical sample of women with genital pain.

Conclusions

The appraisal of vaginal sensations and sexual arousal are context-dependent responses that vary as a function of partner presence and sexual stimulation. Including both partners in the laboratory setting is important to create more valid models on sexual responding.
Balancing Power without Weapons
Authors: Lenihan Ashley Thomas
Published: March 2018

Why do states block some foreign direct investment on national security grounds even when it originates from within their own security community? Government intervention into foreign takeovers of domestic companies is on the rise, and many observers find it surprising that states engage in such behaviour not only against their strategic and military competitors, but also against their closest allies. Ashley Lenihan argues that such puzzling behaviour can be explained by recognizing that states use intervention into cross-border mergers and acquisitions as a tool of statecraft to internally balance the economic and military power of other states through non-military means. This book tests this theory using quantitative and qualitative analysis of transactions in the United States, Russia, China, and fifteen European Union states. It deepens our understanding of why states intervene in foreign takeovers, the relationship between interdependence and conflict, the limits of globalization, and how states are balancing power in new ways. This title is also available as Open Access.
Correction: Author Correction: Menin enhances c-Myc-mediated transcription to promote cancer progression
Authors: Wu Gongwei , Yuan Mengqiu , Shen Shengqi , Ma Xiaoyu , Fang Jingwen , Zhu Lianbang , Sun Linchong , Liu Zhaoji , He Xiaoping , Huang De , Li Tingting , Li Chenchen , Wu Jun , Hu Xin , Li Zhaoyong , Song Libing , Qu Kun , Zhang Huafeng , Gao Ping
Published: March 2018

Nature Communications 8: Article number: 15278 (2017); Published 5 May 2017; Updated 30 March 2018 The originally published version of this Article contained errors in Fig. 6. In panel l, the Nile Red and Merge images of cells treated with shMYC were inadvertently duplicated from the equivalent images of cells treated with MEN1-sh1 and MEN-sh2 in panel n of the same figure.
Correction: Publisher Correction: Simultaneous overactivation of Wnt/β-catenin and TGFβ signalling by miR-128-3p confers chemoresistance-associated metastasis in NSCLC
Authors: Cai Junchao , Fang Lishan , Huang Yongbo , Li Rong , Xu Xiaonan , Hu Zhihuang , Zhang Le , Yang Yi , Zhu Xun , Zhang Heng , Wu Jueheng , Huang Yan , Li Jun , Zeng Musheng , Song Erwei , He Yukai , Zhang Li , Li Mengfeng
Published: March 2018

Nature Communications 8: Article number: 15870 (2017); Published online 19 June 2017; Updated 30 March 2018 In the original version of this Article, the affiliation details for Yan Huang and Li Zhang were incorrectly given as ‘Department of Medical Oncology, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China’, and should have been ‘State Key Laboratory of Oncology in South China, Department of Medical Oncology, Sun Yat-Sen University Cancer Center, Guangzhou 510060, China’.
Pt-Free microengines at extremely low peroxide levels
Authors: Ye Heng , Ma Guofeng , Kang Jian , Sun Hongqi , Wang Shaobin
Published: March 2018

New FeOx–MnO2 catalytic micromotors were developed with high speeds at extremely low H2O2 fuel concentrations.
Controllable CO2-responsiveness of O/W emulsions by varying the alkane carbon number of a tertiary amine
Authors: Dai Shanshan , Suo Yuxin , Liu Dongfang , Zhu Peiyao , Zhao Jihe , Tan Jiang , Lu Hongsheng
Published: March 2018

A series of CO2-responsive oil-in-water (O/W) emulsions were prepared by introducing a hydrophobic tertiary amine (TA) with a varying alkane carbon number (ACN) into the emulsion stabilized by sodium dodecyl benzene sulfonate (SDBS).
Ultrafast excited-state dynamics of 2,5-dimethylpyrrole
Authors: Yang Dongyuan , Min Yanjun , Chen Zhichao , He Zhigang , Yuan Kaijun , Dai Dongxu , Yang Xueming , Wu Guorong
Published: March 2018

The ultrafast excited-state dynamics of 2,5-dimethylpyrrole is studied in detail following deep UV excitation.
Electro-wetting of a nanoscale water droplet on a polar solid surface in electric fields
Authors: Song Fenhong , Ma Long , Fan Jing , Chen Qicheng , Lei Guangping , Li Ben Q.
Published: March 2018

Water molecules interact with a polar surface in an electric field to realign their point dipoles, which determine the spreading behaviors of the droplets.
Energy transfer and photoluminescence properties of lanthanide-containing polyoxotitanate cages coordinated by salicylate ligands
Authors: Li Ning , Subramanian Gomathy Sandhya , Matthews Peter D. , Xiao James , Chellappan Vijila , Rosser Timothy E. , Reisner Erwin , Luo He-Kuan , Wright Dominic S.
Published: March 2018

The salicylate to Ti4+ charge-transfer process and energy transfer mechanisms in a series of polyoxotitanium cages are investigated, to account for their photoluminescence properties.
Synthesis of Gd-functionalized Fe3O4@polydopamine nanocomposites for T1/T2 dual-modal magnetic resonance imaging-guided photothermal therapy
Authors: Guo Hongying , Sun Hongmei , Zhu Hongda , Guo Huiling , Sun Honghao
Published: March 2018

A safe, efficient and inexpensive nanoplatform based on gadolinium-functionalized Fe3O4@polydopamine nanocomposites was fabricated for T1/T2 dual-modal magnetic resonance imaging-guided photothermal therapy.
Improved water oxidation under visible light on oxyhalide Bi4MO8X (M = Nb, Ta; X = Cl, Br) photocatalysts prepared using excess halogen precursors
Authors: Kunioku Hironobu , Nakada Akinobu , Higashi Masanobu , Tomita Osamu , Kageyama Hiroshi , Abe Ryu
Published: March 2018

Preparation of Bi4MO8X with excess BiOX precursors substantially improved their photocatalytic activity for water oxidation by suppressing the formation of surface halogen defects.
Non‐linear companding based hybrid PAPR reduction approach for DCT‐SCFDMA system
Authors: Hossain Md. Rabiul , Ahmmed Kazi Tanvir
Published: March 2018

This study presents a new hybrid scheme that effectively reduces the peak‐to‐average power ratio (PAPR) of discrete cosine transform based single‐carrier frequency division multiple access (DCT‐SCFDMA) signal as well as improves the bit error rate (BER) performance of system. The method is to consolidate pulse shaping process with a novel hyperbolic tangent companding technique so that the PAPR of the SCFDMA signals can be further reduced by enabling the transformation of the amplitude of modulated signals into uniform distribution. Through extensive computer simulations, it has been shown that proposed scheme achieves significant improvements in BER and PAPR reduction over the existing standard pulse shaping methods when used alone in DCT‐SCFDMA system as far as the lowest PAPR is concerned without degrading the error performance of the system.
Concatenated physical layer encryption scheme based on rateless codes
Authors: Huang Ying , Li Wei , Lei Jing
Published: March 2018

A novel concatenated physical‐layer encryption (CPLE) scheme is proposed in this study, where better security can be achieved as well as reliability advantage. In CPLE scheme, the encryption is embedded in rateless encoding. The secret key, which is generated from wireless channel, controls the random degree and random linear combination. The rateless codes are also concatenated with other conventional channel codes, which can achieve better reliability. Different from security codes, both the security and reliability in the proposed scheme can be improved. Furthermore, there is no extra computation requirement on decoding process. Security analysis is presented including time complexity comparison and attacks resistance in practical application. Compared to other PLE schemes, the proposed scheme achieves lower complexity, and higher channel adaptation and performance advantage. On the basis of National Institute of Standards and Technology statistical test suite, CPLE scheme can achieve randomness as the traditional cipher system such as advanced encryption standard. Furthermore, simulation results show that the CPLE scheme outperforms the conventional concatenated codes at the same coderate.
Lightweight one‐time password authentication scheme based on radio‐frequency fingerprinting
Authors: Chen Yi , Wen Hong , Song Huanhuan , Chen Songlin , Xie Feiyi , Yang Qing , Hu Lin
Published: March 2018

The energy‐constrained devices such as the mobile terminals and nodes of the Internet of Things make lightweight security schemes an urgent need. The traditional identity authentication techniques can provide protection for the user's privacy and information to a certain extent, but they suffer from heavy cost. Non‐cryptographic authentication mechanisms based on the physical layer characteristics are new techniques, which have a higher security level. The recognition technique of radio transmitter based on radio‐frequency fingerprint (RFF) is one of the non‐cryptographic authentication techniques. The authors propose a lightweight one‐time password (OTP) authentication scheme based on RFF (RFF‐OTP), which is a novel cross‐layer secure authentication scheme and can provide mutual authentication between the mobile terminal and server, by combining RFF recognition algorithm with a hash encryption algorithm. By theoretical analysis and Syverson and van Oorschot logic verification, they prove that the RFF‐OTP scheme is simple, efficient, flexible and independent of trusted‐party while it also can resist the cloning attack and satisfy the anonymity compared with the OTP authentication scheme. Besides, it only requires the password to log into the system in the authors’ scheme in comparison to the OTP scheme that needs both ID and password for the same purpose.
Inter‐area oscillation damping with non‐synchronised wide‐area power system stabiliser
Authors: Patel Abhilash , Ghosh Sandip , Folly Komla A.
Published: March 2018

One of the major issues in an interconnected power system is the low damping of inter‐area oscillations which significantly reduces the power transfer capability. A speed deviation‐based wide‐area power system stabiliser (WAPSS) is known to be effective in damping inter‐area modes which use feedback from remote locations. However, the involvement of wide‐area signals gives rise to the problem of time delay, which may degrade the system performance. The delay in synchronised and non‐synchronised feedback to WAPSS can have alternate performances. The effect of delays in such WAPSS with two types of feedback is studied and controllers are synthesised using the control with regional pole placement to ensure adequate dynamic performance. To show the effectiveness of the proposed approach, two power system models have been used for the simulations. It is shown that the controllers designed based on the non‐synchronised signals are more robust to time‐delay variations than the controllers using the synchronised signal.
Pre‐low noise amplifier (LNA) filtering linearisation method for low‐power ultra‐wideband complementary metal oxide semiconductor LNA
Authors: Abbas Mohammed Nadhim , Khaleel Farooq Abdulghafoor
Published: March 2018

This study describes the use of a pre‐low noise amplifier (LNA) third‐order notch filter as a novel linearity enhancement technique for ultra‐wideband complementary metal oxide semiconductor LNA current‐reuse topology. The second/third order input intercept point (IIP2/3) has improved along the entire working bandwidth (BW) from 2.1 to 12.5 GHz. The suggested linearisation technique achieves maximum/minimum IIP2 improvement from 19.068 to 104.143 dBm at 6.4 GHz and from 22.5 to 57.42 dBm at 5.5 GHz, respectively. In addition, this work achieves maximum/minimum IIP3 improvement from −7.956 to 34.688 dBm at 6.4 GHz and from −9.986 to 8.281 dBm, respectively. Moreover, the suggested linearisation technique does not affect the total ultra‐wideband (UWB)‐LNA power consumption, which is only 6.7 mW. Furthermore, the linearised UWB‐LNA average noise figure is 1.6535 dB at the entire working BW. The simulation is performed and optimised with an advanced design system utilising BSIM3v3 TSMC 180 nm model files at different temperature values.
Isolated soft‐switched boost DC–DC converter with low‐voltage stress and high step‐up ratio
Authors: Santra Subhendu Bikash , Kumar Kundan , Mohapatra Srikanta , Chatterjee Debashis
Published: March 2018

This study presents a novel soft‐switched isolated boost converter which can provide a high‐step‐up ratio and high efficiency with low‐voltage stress for portable application as well as a photovoltaic‐assisted converter system. A lossless active clamp snubber circuit helps in achieving zero‐voltage‐switching turn‐off and zero‐current‐switching (ZCS) turn‐on of the main switch and ZCS turn‐off of diodes that reduce switching losses. An auxiliary switch with an energy recovery circuit helps to increase power conversion efficiency and reduces switching stress across the main switch. The proposed idea is simulation through computer‐assisted software PSIM 9.1.1 and validated experimentally through a designed prototype 250 W direct current (DC)–DC converter.
Synthesis and characterisation of Fe3O4 at MPTMS at Au nanocomposite by sol–gel method for the removal of methylene blue
Authors: Mohebbi Maryam , Allafchian Alireza , Jalali Seyed Amir Hossein , Kameli Parviz
Published: March 2018

New magnetic nanocomposite core‐shell–shell Fe3O4 at 3‐mercoptopropyltrimethoxysilan (s) at Au has been synthesised by the sol–gel method. First magnetite nanoparticles are synthesised by co‐precipitation method, then the obtained particles are coated by MPTMS coating with the sol–gel method. At final step, gold nanoparticle has been used to coat Fe3O4 at MPTMS. New magnetic nanocomposite has been characterised by using X‐ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy and vibrating sample magnetometer, UV–vis spectroscopy. The new nanocomposite has been studied for its efficiency in adsorption of methylene blue (MB) as a model for azo paints which has been widely used in aquatic solutions of textile industry. The adsorption test has been carried out at various contact time of adsorbent and dye, temperature and stirring speed under visible light. The results indicate that the adsorption capacity of MB dye rises by the increase in the temperature, stirring speed and the contact time between MB and adsorbent. This nanocomposite easily separated from the solution with help of week magnetic field. Therefore this new adsorbent could be regarded as a very good adsorbent for MB removal.
A new gamma-ray source unveiled by AGILE in the region of Orion
Authors: Marchili N. , Piano G. , Cardillo M. , Giuliani A. , Molinari S. , Tavani M.
Published: March 2018

Context. Diffuse galactic γ-ray emission is produced by the interaction of cosmic rays (CRs) with the interstellar environment. The study of γ-ray emission is therefore a powerful tool that can be used to investigate the origin of CRs and the processes through which they are accelerated.

Aims. Our aim is to gain deeper insights into the nature of γ-ray emission in the region of Orion, which is one of the best studied sites of ongoing star formation, by analysing data from the AGILE satellite. Because of the large amount of interstellar medium (ISM) present in it, the diffuse γ-ray emission expected from the Orion region is relatively high. Its separation from the galactic plane also ensures a very small contribution from foreground or background emission, which makes it an ideal site for studying the processes of particle acceleration in star-forming environments.

Methods. The AGILE data are modelled through a template that quantifies the γ-ray diffuse emission expected from atomic and molecular hydrogen. Other sources of emission, such as inverse Compton (IC) scattering in interstellar radiation fields (ISRF) and extragalactic background, can be modelled as an isotropic contribution.

Results. Gamma-ray emission exceeding the amount expected by the diffuse emission model is detected with a high level of significance. The main excess is in the high-longitude part of Orion A, which confirms previous results from the Fermi Large Area Telescope. A thorough analysis of this feature suggests a connection between the observed γ-ray emission and the B0.5 Ia star κ Orionis.

Conclusions. We present the results of the investigation of γ-ray diffuse galactic emission from the region of Orion. The comparison between modelled and observed emission points towards the existence of higher-than-expected γ-ray flux from a 1° radius region centred in κ Orionis, compatible with the site where stellar wind collides with the ISM. Scattering on dark gas and cosmic-ray acceleration at the shock between the two environments are both discussed as possible explanations, with the latter hypothesis being supported by the hardness of the energy spectrum of the emission. If confirmed, this would be the first direct detection of γ-ray emission from the interaction between ISM and a single star’s stellar wind.
The Silicon Tracking System of the CBM experiment at FAIR
Authors: Teklishyn Maksym
Published: March 2018

The Silicon Tracking System (STS) is the central detector in the Compressed Baryonic Matter (CBM) experiment at FAIR. Operating in the 1Tm dipole magnetic field, the STS will enable pile-up free detection and momentum measurement of the charged particles originating from beam-target nuclear interactions at rates up to 10 MHz. The STS consists of 8 tracking stations based on double-sided silicon micro-strip sensors equipped with fast, self-triggering read-out electronics. With about two million read-out channels, the STS will deliver a high-rate stream of time-stamped data that is transferred to a computing farm for on-line event determination and analysis. The functional building block is a detector module consisting of a sensor, micro-cables and two front-end electronics boards. In this contribution, the development status of the STS components and the system integration is discussed and an outlook on the detector construction is given.
Sustainable Streetscape Design Guideline based on Universal Design Principles
Authors: Harsritanto Bangun IR
Published: March 2018

People access the streets to fulfill their daily demands regardless of their gender, age, and abilities. The streetscape is an urban public space which built to facilitate the basic needs of people as social beings. Universal design accommodates the wide range of human diversity in physical appearance, perception, cognitive abilities, body sizes, and shapes. By designing for this diversity, the streetscapes are becoming more user friendly, functional and sustainable. The purpose of this study is to suggest streetscape design guideline based on universal design principles for giving proper directions of sustainable streets development. Literatures study and cases study were used as research methods. The findings indicated that the new guideline based on universal design can be suggested to streetscapes design directions on many countries.
The Influence of Freight Generation Production Characteristics of the Internal – Regional Zone Commodities on Sustainable Freight Transportation Highway Network System
Authors: Akbardin Juang , Parikesit Danang , Riyanto Bambang , Taufik Mulyono Agus
Published: March 2018

The increasing of commodity freights production in the internal – regional zone is a national development strategy to create interzone consolidation to accelerate the productivity of an internal – regional zone staple commodity. Sustainable freight transportation development requires a strategic direction based on the commodity freights production dominant characteristics in an internal-regional zone. This research has been done to estimate the distribution model and route assignment model of staple alternative commodity. Estimated generation production of commodity freights movement in production zones is influenced by zone demographic variables, infrastructure, and means of transportation. Gravity method is used to estimate the distribution model and route assignment model by calibrating it with Newton-Raphson method. The application and development of the gravity method in the modelling analysis will determine the estimation effect of sustainable freights transportation needed. The computational simulation result is an approach of mathematical model illustration for complex and systematic estimation. Therefore, the modelling results can provide the direction of sustainable highway construction on the highway network system, will determine the effectiveness and efficiency of traffic movement, and distribute the movement
The Comparison of Bond Strength between Geopolymer Concrete and OPC Concrete for Plain Reinforcing Bars
Authors: Nuroji  , Herdian Primadyas Daniel , Nurhuda Ilham , Muslikh
Published: March 2018

This paper describes the research on bond behavior of plain reinforcing bars in geopolymer and normal concrete. The geopolymer concrete in this research was made of class F fly ash taken from Tanjung Jati Electric Steam Power Plant (PLTU) with Sodium Hydroxide (NaOH) and Sodium Silicate (Na2SiO3) as alkaline activator, added in the mixture. The effect of bar size was studied by varying the bar diameter in range 10 mm to 19 mm. Each bar was casted in the center of concrete blocks made of geopolymer as well as normal concrete. Pull-out tests were carried out to the specimens that have reached 28 days of age. The test results show that the bond behavior of geopolymer concrete differs substantially from normal concrete, where geopolymer concrete has a higher bond strength when compared to normal concrete with identical concrete strengths.
Analysis of Groundwater Quality Surrounding Municipal Solid Waste Landfill: Banyuurip Landfill, Magelang, Indonesia
Authors: Arief Budihardjo Mochamad , Purwono  , Selfi Nugraheni Annisa
Published: March 2018

Banyuurip landfill generates leachate containing suspended and dissolved matter, including some heavy metals, a result of waste degradation and decomposition of organic materials. Leachate can infiltrate the soil then contaminate groundwater. Once the leachate infiltration reaches the soil and groundwater, it will contaminate the surrounding environment. In this study, the contamination of leachate into ground water was investigated by measuring the concentration of Manganese (Mn), Iron (Fe) and Free Ammonia (NH3-N) in leachate and dug wells surrounding the landfill. The concentration of Mn, Fe and NH3-N in leachate was found to be 5.42 mg/L, 6.16 mg/L, and 1652 mg/L, respectively. The concentration in the surrounding dug wells located within 500 m from the landfill varied from 0.00 – 0.86 mg/L for free ammonia, 0.00 – 0.31 mg/L for total Fe, and 0.00 – 0.26 mg/L for total Mn. The concentration of Mn, Fe and NH3-N decrease with increasing distance between the landfill and wells.
The potential biodiesel production from Cerbera odollam oil (Bintaro) in Aceh
Authors: Khairil  , Rizki Aulia , Iskandar  , Jalaluddin  , Silitonga A.S. , Masjuki H.H. , Mahlia T.M.I.
Published: March 2018

Biodiesel production from non-edible vegetable oils is an effective way to conquer the linked problems with edible oils such as food versus fuel and other environmental impacts. Cerbera odollam oil is one of these possible non-edible feed stocks for future biodiesel production. This study evaluated the potential biodiesel production from cerbera odollam. The seed was collected and extracted from Aceh, Indonesia. Moreover, biodiesel has been produced using degummed (H3PO4) and two step acid catalyst (HCl) and alkaline catalyst (KOH). The results of properties of the cerbera odollam methyl esters show that such as viscosity was about 847.9 mm2/s, density was 3.1578 kg/m3, flash point was 214.0°C, acid value was 0.4 mg KOH/g, oxidation stability was 6.35 h, FAME content was 97.77 % w/w and heating value was 40.49 MJ/kg. After analysing these properties, it has been found that there is a huge chance to produce biodiesel from this seed which complies with the limits of ASTM 6751 and EN 14214 specifications and therefore it can boost the future production of biodiesel from non-edible sources.
Experimental performance studies of small wall room air conditioner for R410A retrofitted with R290
Authors: Fajar TK Berkah , Nicolas Dipto I Geraldus
Published: March 2018

An original R410A wall room air conditioner was retrofitted with R290 for performance experiments. The R410A wall room air conditioner has a COP and a refrigerating capacity 6.0597and 1929.3 W respectively. In this study, the compressor R410A wall room air conditioner compressor was replaced with an R22 which is compatible. Mass R290 charged into the wall room air conditioner was 33.88%, 38.12% and 42.35%. Refrigerating capacity obtained was 1837 W, 1848.2 W and 2008.4W, while the COP was 5.2014, 5.0294, and 5.3275. The results obtained the R410A wall room air conditioner performance better than if the air conditioning machine retrofitted with R290.
An Integration of PSO-based Feature Selection and Random Forest for Anomaly Detection in IoT Network
Authors: Tama Bayu Adhi , Rhee Kyung-Hyune
Published: March 2018

The most challenging research topic in the field of intrusion detection system (IDS) is anomaly detection. It is able to repeal any peculiar activities in the network by contrasting them with normal patterns. This paper proposes an efficient random forest (RF) model with particle swarm optimization (PSO)-based feature selection for IDS. The performance model is evaluated on a well-known benchmarking dataset, i.e. NSL-KDD in terms of accuracy, precision, recall, and false alarm rate(FAR) metrics. Furthermore, we evaluate the significance differencesbetween the proposed model and other classifiers, i.e. rotation forest (RoF)and deep neural network (DNN) using statistical significance test. Basedon the statistical tests, the proposed model significantly outperforms otherclassifiers involved in the experiment.
Synthesis Sensitive Layer of Ethylene Gas Sensor Based Tin Oxide Nanoparticles Using Water as Solvent In Precipitation Method
Authors: Nabena Erica Caesariaty Harni Prima , Yuliarto Brian , Nugraha  , Iqbal Muhammad
Published: March 2018

Ethylene gas is a gas naturally released by fruits. The maturity level of these fruits could be predicted from the amount of ethylene around them. To maintain the freshness of these fruits, the concentrations of surrounding ethylene need to be monitored. Therefore, suitable gas sensor ethylene were still in progress to get good respond. In this paper systhesis of pure SnO2 nanoparticle from SnCl2.2H2O and water solution in precipitation method was held. The tin oxide powder was obtained in good distribution with nanoparticle size. This nanoparticle powder was formed into thick film, using ethylene glycol as solvant. To observe this sensor characteristics, several test was held in various conditions. Gas testing used pure ethylene gas show better respond at higher than room temperature but recovery time still unsatisfying.
Projection Matrix Design for Co-Sparse Analysis Model Based Compressive Sensing
Authors: Oey Endra , Gunawan Dadang , Sudiana Dodi
Published: March 2018

Co-sparse analysis model based-compressive sensing (CAMBCS) has gained attention in recent years as alternative to conventional sparse synthesis model based (SSMB)-CS. The equivalent operator as counterpart of the equivalent dictionary in the SSMB-CS is introduced in the CAMB-CS as the product of projection matrix and transpose of the analysis dictionary. This paper proposes an algorithm for designing suitable projection matrix for CAMB-CS by minimizing the mutual coherence of the equivalent operator based on equiangular tight frames design. The simulation results show that the CAMB-CS with the proposed projection matrix outperforms the SSMB-CS in terms of the signal quality reconstruction.
Effect of post curing method on flexural strength of composite friction brake
Authors: Budiono Herru Santoso , Surojo Eko , Muhayat Nurul , Raharjo Wijang Wisnu
Published: March 2018

Friction brake material is important component in the braking system of the vehicles. These materials are usually made of asbestos and non-asbestos materials. Some non-asbestos materials use natural fibers as reinforcement and phenolic resin as a binder. The post-curing process is carried out by heating a material with specific temperature and time. During post curing, ammonia gas as the reaction of the phenolic resin and HMTA diffuses out from the friction brake material. The heating rate in post curing was supposed affecting process of removal ammonia gas from composite and it will affect mechanical properties of the composite. Therefore, this paper is concerned with effect of post curing method on the composite flexural strength. Composite specimen were manufactured by mixing the ingredients, preforming, hot molding and followed by post curing. Bending tests performed to determine the effect of post curing the flexural strength. The results showed that heating rate in post curing affected flexural strength of composite. Flexural strength of composite decreased with increasing heating rate. Internal defect that were formed during post curing decreased composite flexural strength.
Numerical simulation of heat transfer augmentation in fin-and-tube heat exchanger with various number of rows of concave rectangular winglet vortex generator
Authors: Syaiful  , Syarifudin Imam , Soetanto Maria F. , Bae Myung-whan
Published: March 2018

The passive method by using a vortex generator (VG) is an effective method for the improvement of convective heat transfer. This study is focused on usage of concave rectangular winglet vortex generator (CRW VG) for improving convective heat transfer in a fin-and-tube heat exchanger using numerical simulation. Concave rectangular winglet pairs (CRWP) and rectangular winglet pairs (RWP) VGs were mounted inside the gap between fins (gas side) with variations of the number of VG pairs of rows. Inlet air velocity variations expressed by the Reynolds numbers were ranged from 364 to 689. Augmentation of heat transfer is indicated by the ratio value of heat transfer convection coefficient between cases using VG and that without using VG (baseline). The results show that the convection heat transfer coefficient for cases using CRWP VG is higher than that using RWP VG. Convection heat transfer coefficient increases up to 102% by mounting CRWP VG at Re = 364. However, the increase in convection coefficient is accompanied by a rise in pressure drop to 216.8%.
Development of Tension-Torsion Multiaxial Creep Testing Apparatus for Heat Resisting Steel
Authors: Hiyoshi Noritake , Iriyama Yoshihisa
Published: March 2018

This paper describes development of a combined tensiontorsion multiaxial creep testing apparatus for heat resisting steel. It is essential for high temperature component designing to investigate creep rupture life and creep properties of heat resisting steel. Although high temperature structural components undergo multiaxial stress damage due to complex loading situation or shape discontinuity of the actual structure, there is no commercial testing apparatus which can conduct a creep testing under multiaxial stress conditions. In this study, we developed a combined tension-torsion multiaxial creep testing apparatus which can apply multiaxial stress to a hollow cylinder type testing specimen with 6 kN axial load and 12 Nm torsional load at high temperatures. Since the testing apparatus also has measuring devices for axial and shear displacements of the specimen, relationship curve between testing time and equivalent strain under multiaxial stress conditions of type 304 stainless steel is also discussed.
Experimental Study Performance R-22 AC Split Retrofitted With Propane
Authors: Ridwan Tanaka Imam , Fajar Berkah , Suryo Utomo Tony , Yohana Eflita , Mustaqim
Published: March 2018

Refrigerant 22 or called R-22 is still the most widely used for air conditioners. However, since it has a relatively high global warming properties, the use of R-22 should be stopped. Refrigerant 290 briefed as R-290 (propane) is the type of refrigerant recommended by many experts for R-22 replacements because the global warming properties of R290 are much lower than R-22. Therefore, in this study the cooling capacity, flow rate mass, power consumed and COP will be evaluated. The air conditioner engine used in this research has 1 PK capacity which is redesigned by adding separator / ducting on various main components of AC. From the result of the study, there are several conclusions revealed: on the same compressor capacity, R-22 cooling capacity is still greater than R290. Meanwhile, the flow rate of R290 is lower than R-22. For power consumption from R-290, it is smaller than R-22. For the value of COP R-290, the value shows greater ie at R-290 on the variation of Incoming Temperature In Evaporator 20°C = 6.23, 23°C = 6.36, 25°C = 6.86, 29°C = 6.20. While at R-22, it shows 20°C = 5.36, 23°C = 6.02, 25°C = 5.76, 29°C = 6.335
The Modeling Of A Conceptual Engineering Design System Using The Decision-Matrix Logic
Authors: Ramdhani Safarudin , Jamari J
Published: March 2018

Decision making a concept the optimal inside a concept engineering design (CED) is a job repeated. Decision matrix based method is the most popular concept selection approach used in engineering design. A matrix is an array that presents an axis of the alternate list being evaluated. The list of weighted criteria depends upon the importance of each of the final decisions to be taken. The decision matrix in this determined some weights and the rank as attributes to evaluate a total scores. Upon the weighting sometimes make the designer confusedly in determine variety. This paper described a decision making computer based, where a logic matrix decisions on a basis in the selection and evaluation. This model presents a logical procedure for concept evaluation considering the specified attribute. In decision-making this model is integrated and intended to improve the ability of beginners in designing.
Design and fabrication of a twist fixture to measure torsional stiffness of a pick up chassis
Authors: Kurdi Ojo , Yob Mohd Shukri , Haji Ishamuddin Awisqarni , Suprihanto Agus , Widyanto Susilo Adi , Wibowo Dwi Basuki , Yulianti Ian
Published: March 2018

Torsional stiffness is important parameter of chassis that affect the handling performance of chassis. Torsional stiffness can be determined using Finite Element Method (FEM) in early stage design of its. In order to validate the FEM result, experimental work needs to be done. The fixture has been design in simpler stucture, flexible for any kind of chassis and using a simple measurement’s equipment such as dial indicator and load cell. Twist fixture has been designed for measuring of torsional stiffness of TATA cab chassis indirectly. The fixture measured the deflection caused by torsion subjected to the chassis. The torsional stiffness was calculated based on measured displacement of chassis. The result of comparison shows that the experimental results in agreement with the simulation results. Therefore, the simulation results of TATA cab chassis model are valid.
Effects of Different Heel Heights on Heel Pressure Distribution for Calcaneal Spur Patients During Standing: Finite Element Analysis
Authors: Basuki Wibowo Dwi , Widodo Achmad , Dwi Haryadi Gunawan , Suprihanto Agus
Published: March 2018

This study was performed to investigate heel height shoe for every patient which peak pressure in the heel area is lower than pain minimum compressive pressure. Heel heights of the shoes are standardized as 0-4 cm. Sixteen patients with symptomatic heel spur participated in this study. Peak pressure due to its own weight is estimated using FEM and compared with the results of measurement using FSR (force sensing resistor). As heel height increased, peak pressure in heel region in the heel height 2 cm, 3 cm and 4 cm are larger 3.86% and smaller 5.04% and 22.11% respectively compared to the smallest pain compressive pressure. These peak pressures are significantly higher than the average pressure in CH (center of heel) measurement results due to the difference in the location of peak pressure to CH at average of 8.64 ± 1.44 mm.
Design and Simulation of Fuzzy Logic Based Temperature Control for a Mixing Process in Therapeutic Pool
Authors: Munadi  , Ramadhan Erwin F. , Ariyanto Mochammad , Iskandar Norman , Amirullah M.A. , Julianti Hari P. , Setiawan Rudy
Published: March 2018

Stroke is one cause of the most deaths, in which one way of handling stroke can be done with hydrotherapy. Hydrotherapy is a therapy that is done in the therapeutic pool which is filled with warm water in temperature 31°-34° C. When in the warm water, body burden becomes lighter, so the stroke patients with impaired movement of the body can train the nerves and muscles in order to restore the function of these organs. However, the warm water that is used for the therapy is produced by the heater that requires much electrical energy. This research discussed how to use solar energy to produce hot water using Indirect Evacuated Tube Solar Water Heater systems and make the control system for controlling the mixing process between the hot and cold water by using the Fuzzy Logic Control of the Mamdani method. Therapeutic pool system will be modeled using Simulink. Modeling the mixing process is made on the basis of mass balance and energy balance equations. Then the system will be simulated with interrupted condition and gets set value changes in a particular time. The FLC is successfully reached and maintained steady to a set value. The results will be compared to the performance of the one with Proportional Integral Derivative controller.