bluuebunny/crossref_metadata_2025 huggingface dataset:
Thin Perforator Flaps for Reconstruction of the Lower Extremity
Authors: Ebner Peggy J. , Gould Daniel J. , Patel Ketan M.
Published: August 2019

Thin flaps, a modification of traditional flaps that minimize the need for debulking and revision, offer unique advantages in the field of lower limb reconstruction. Advances in the field of microsurgery have made this streamlined method of reconstruction a viable solution for soft tissue coverage in patients with both trauma and nonhealing wounds. Better understanding of anatomy has allowed for flap harvest above the fascia level and the Scarpal plane. These modifications allow for flap transfer with thicknesses more comparable to the native anatomy of the lower leg, ankle, and foot. Flap survival is comparable to traditional techniques with greater potential for improved patient-centered outcomes.
Management of Lifestyle Factors in Individuals with Cirrhosis: A Pragmatic Review
Authors: Tandon Puneeta , Berzigotti Annalisa
Published: August 2019

Lifestyle-related factors are major determinants/modifiers of prognosis in patients with cirrhosis. Accumulating evidence indicates that malnutrition, obesity, sedentary lifestyle, alcohol and smoking habits, and likely poor oral hygiene can increase the risk of progression of the disease, and some of them are linked to higher risk of hepatocellular carcinoma. Importantly, lifestyle-related factors can be largely corrected, and as such they represent an attractive approach to be added to etiological and pharmacological therapy in patients with cirrhosis. Nonetheless, lifestyle is often neglected in this population. In this concise review, the authors present evidence supporting lifestyle changes in patients with cirrhosis—including, but not limited to, nutrition and physical activity in malnourished and obese patients. They also discuss some elements of motivational interviews as a tool to support a better interaction between hepatologists and patients in this field.
Therapeutische Fortbildung: Wissen, was wichtig ist
Authors: Alt D. Benjamin
Published: August 2019

Lebenslanges Lernen ist für Therapeuten unabdingbar, um Patienten immer eine bestmögliche Behandlung nach aktuellem Wissensstand gewährleisten zu können. Das
VPTMAGAZIN befragte VPT-Justiziar D. Benjamin Alt zum Thema Fortbildungen. Wir wollten wissen, was Therapeuten Rechtliches im Jahr 2019 beachten
sollten.
Propagating molecular rotational coherences through single-frequency pulses in the strong field regime
Authors: Hernandez-Castillo A. O. , Abeysekera Chamara , Robicheaux F. , Zwier Timothy S.
Published: August 2019

In the weak-field limit in which microwave spectroscopy is typically carried out, an application of a single-frequency pulse that is resonant with a molecular transition will create a coherence between the pair of states involved in the rotational transition, producing a free-induction decay (FID) that, after Fourier transform, produces a molecular signal at that same resonance frequency. With the advent of chirped-pulse Fourier transform microwave methods, the high-powered amplifiers needed to produce broadband microwave spectra also open up other experiments that probe the molecular response in the high-field regime. This paper describes a series of experiments involving resonant frequency pulses interrogating jet-cooled molecules under conditions of sufficient power to Rabi oscillate the two-state system through many Rabi cycles. The Fourier-transformed FID shows coherent signal not only at the applied resonant frequency but also at a series of transitions initially connected to the original one by sharing an upper or lower level with it. As the duration of the single-frequency excitation is increased from 250 to 1500 ns, the number of observed off-resonant, but dipole-allowed, molecular coherences grow. The phenomenon is quite general, having been demonstrated in Z-phenylvinylnitrile, E-phenylvinylnitrile (E-PVN), benzonitrile, guaiacol, and 4-pentynenitrile. In E-PVN, the highest power/longest pulse duration, coherent signal is also present at energetically nearby but not directly connected transitions. Even in molecular samples containing more than one independent species, only transitions due to the single species responsible for the original resonant transition are present. We develop a time-dependent model of the molecular/photon system and use it in conjunction with the experiment to test possible sources of the phenomenon.
Determining velocity of detonation using high-resolution time domain reflectometry
Authors: Rae P.
Published: August 2019

Two methods are presented to make measurements of the length of a coaxial cable with submillimeter and submicrosecond accuracy. If the cable is destroyed by the passage of a strong shock, for instance, from the detonation of an explosive, a measure of the phase velocity of the detonation (VOD) can be obtained with high accuracy (≈0.25%). The first method introduces a series of short Gaussian electrical pulses (<300 ps) into the cable that reflect off the cable end and are compared to the time of the original outgoing pulse by using a fast digitizer (100 gigasamples per second). By curve fitting a Gaussian form to the outgoing and reflected pulses, a measurement of the cable length can be made with subsample accuracy. So, as long as the pulses do not overlap, a large number may be present in the cable at any time allowing pulse repetition rates of 40–135 MHz depending on the cable length. Averaging allows accurate VOD measurements to be made that are comparable with the best traditional techniques. The second method replaces the pulser with a wide-spectrum (0.1–10 GHz) amplified random noise source. A similar setup and digitizer are used before autocorrelating short (80–160 ns) subsamples of the total waveform to measure the reflected delay time. That is, a smaller amplitude version of the original waveform appears time shifted by twice the transit time in the cable and this time is estimated via autocorrelation. The advantage of this method is that a new subsample needs only to be selected from a time increment in which new spectral information is present for a new measure of the length to be made. In this manner, many more length estimates can be averaged to establish the VOD than with the Gaussian approach. A detailed description of the implementation of both methods is presented together with an example of the type of data collected and limitations found.
Rapid and high-precision sizing of single particles using parallel suspended microchannel resonator arrays and deconvolution
Authors: Stockslager Max A. , Olcum Selim , Knudsen Scott M. , Kimmerling Robert J. , Cermak Nathan , Payer Kristofor R. , Agache Vincent , Manalis Scott R.
Published: August 2019

Measuring the size of micron-scale particles plays a central role in the biological sciences and in a wide range of industrial processes. A variety of size parameters, such as particle diameter, volume, and mass, can be measured using electrical and optical techniques. Suspended microchannel resonators (SMRs) are microfluidic devices that directly measure particle mass by detecting a shift in resonance frequency as particles flow through a resonating microcantilever beam. While these devices offer high precision for sizing particles by mass, throughput is fundamentally limited by the small dimensions of the resonator and the limited bandwidth with which changes in resonance frequency can be tracked. Here, we introduce two complementary technical advancements that vastly increase the throughput of SMRs. First, we describe a deconvolution-based approach for extracting mass measurements from resonance frequency data, which allows an SMR to accurately measure a particle’s mass approximately 16-fold faster than previously possible, increasing throughput from 120 particles/min to 2000 particles/min for our devices. Second, we describe the design and operation of new devices containing up to 16 SMRs connected fluidically in parallel and operated simultaneously on the same chip, increasing throughput to approximately 6800 particles/min without significantly degrading precision. Finally, we estimate that future systems designed to combine both of these techniques could increase throughput by nearly 200-fold compared to previously described SMR devices, with throughput potentially as high as 24 000 particles/min. We envision that increasing the throughput of SMRs will broaden the range of applications for which mass-based particle sizing can be employed.
The effects of site asymmetry on near-degenerate state-to-state vibronic mixing in flexible bichromophores
Authors: Kidwell Nathanael M. , Nebgen Benjamin , Slipchenko Lyudmila V. , Zwier Timothy S.
Published: August 2019

Laser-induced fluorescence excitation and dispersed fluorescence spectra of a model flexible bichromophore, 1,1-diphenylethane (DPE), have been recorded under jet-cooled conditions in the gas phase in the region near the first pair of near-degenerate excited states (S1 and S2). The S1 and S2 origin transitions have been identified at 37 397 and 37 510 cm−1, a splitting of 113 cm−1. This splitting is four times smaller than the excitonic splitting calculated by ab initio methods at the EOM-CCSD/cc-pVDZ level of theory (410 cm−1), which necessarily relies on the Born-Oppenheimer approximation. Dispersed fluorescence spectra provide a state-to-state picture of the vibronic coupling. These results are compared with the results of a multimode vibronic coupling model capable of treating chromophores in asymmetric environments. This model was used to predict the splitting between S1 and S2 origins close to the experiment, reduced from its pure excitonic value by Franck-Condon quenching. Quantitative accuracy is achieved by the model, lending insight into the state-to-state mixing that occurs between individual S1 and S2 vibronic levels. The S2 origin is determined to be mixed with S1(v) levels by two mechanisms common to internal conversion in almost any setting; namely, (i) mixing involving near-degenerate levels with large vibrational quantum number changes that are not governed by Δv = 1 Herzberg-Teller (HT) selection rules, and (ii) mixing with levels with larger energy gaps that do follow these selection rules. In DPE, the asymmetric ring flapping vibrational mode R¯ dominates the HT coupling.
Toward the efficient local tailored coupled cluster approximation and the peculiar case of oxo-Mn(Salen)
Authors: Antalík Andrej , Veis Libor , Brabec Jiří , Demel Ondřej , Legeza Örs , Pittner Jiří
Published: August 2019

We introduce a new implementation of the coupled cluster method with single and double excitations tailored by the matrix product state wave functions (DMRG-TCCSD), which employs the local pair natural orbital (LPNO) approach. By exploiting locality in the coupled cluster stage of the calculation, we were able to remove some of the limitations that hindered the application of the canonical version of the method to larger systems and/or with larger basis sets. We assessed the accuracy of the approximation using two systems: tetramethyleneethane (TME) and oxo-Mn(Salen). Using the default cut-off parameters, we were able to recover over 99.7% and 99.8% of the canonical correlation energy for the triplet and singlet state of TME, respectively. In the case of oxo-Mn(Salen), we found that the amount of retrieved canonical correlation energy depends on the size of the complete active space (CAS)—we retrieved over 99.6% for the larger 27 orbital CAS and over 99.8% for the smaller 22 orbital CAS. The use of LPNO-TCCSD allowed us to perform these calculations up to quadruple-ζ basis set, amounting to 1178 basis functions. Moreover, we examined dependence of the ground state of oxo-Mn(Salen) on the CAS composition. We found that the inclusion of 4dxy orbital plays an important role in stabilizing the singlet state at the DMRG-CASSCF level via double-shell effect. However, by including dynamic correlation, the ground state was found to be triplet regardless of the size of the basis set or the composition of CAS, which is in agreement with previous findings by canonical DMRG-TCCSD in smaller basis.
Experimental and theoretical analysis for total electron scattering cross sections of benzene
Authors: Costa F. , Álvarez L. , Lozano A. I. , Blanco F. , Oller J. C. , Muñoz A. , Barbosa A. Souza , Bettega M. H. F. , Ferreira da Silva F. , Limão-Vieira P. , White R. D. , Brunger M. J. , García G.
Published: August 2019

Measurements of the total electron scattering cross sections (TCSs) from benzene, in the impact energy range of 1–1000 eV, are presented here by combining two different experimental systems. The first utilizes a magnetically confined electron transmission beam for the lower energies (1–300 eV), while the second utilizes a linear transmission beam apparatus for the higher energies (100–1000 eV). These cross sections have also been calculated by means of two different theoretical methods, the Schwinger Multichannel with Pseudo Potential (SMCPP) procedure, employing two different approaches to account for the polarization of the target for impact energies between 0.1 and 15 eV, and the Independent Atom Model with the Screening Corrected Additivity Rule including Interference effect (IAM-SCAR+I) paradigm to cover the 10–10 000 eV impact energy range. The present results are compared with available theoretical and experimental data, with the level of accord being good in some cases and less satisfactory in others, and some predicted resonances have been identified. In particular, we found a π* shape resonance at 1.4 eV and another feature in the energy region 4.6–4.9 eV interpreted as a π* resonance (2B2g symmetry), which is a mixture of shape and a core excited resonance, as well as a Feshbach resonance at 5.87 eV associated with the 3s (a1g) Rydberg state. A Born-type formula to extrapolate TCS values for energies above 10 000 eV is also given. This study provides a complete set of TCS data, with uncertainty limits within 10%, ready to be used for modeling electron transport applications.
Tracing charge transfer in argon dimers by XUV-pump IR-probe experiments at FLASH
Authors: Schmid Georg , Schnorr Kirsten , Augustin Sven , Meister Severin , Lindenblatt Hannes , Trost Florian , Liu Yifan , Miteva Tsveta , Gisselbrecht Mathieu , Düsterer Stefan , Redlin Harald , Treusch Rolf , Gokhberg Kirill , Kuleff Alexander I. , Cederbaum Lorenz S. , Schröter Claus Dieter , Pfeifer Thomas , Moshammer Robert
Published: August 2019

Charge transfer (CT) at avoided crossings of excited ionized states of argon dimers is observed using a two-color pump-probe experiment at the free-electron laser in Hamburg (FLASH). The process is initiated by the absorption of three 27-eV-photons from the pump pulse, which leads to the population of Ar2+*–Ar states. Due to nonadiabatic coupling between these one-site doubly ionized states and two-site doubly ionized states of the type Ar+*–Ar+, CT can take place leading to the population of the latter states. The onset of this process is probed by a delayed infrared (800 nm) laser pulse. The latter ionizes the dimers populating repulsive Ar2+ –Ar+ states, which then undergo a Coulomb explosion. From the delay-dependent yields of the obtained Ar2+ and Ar+ ions, the lifetime of the charge-transfer process is extracted. The obtained experimental value of (531 ± 136) fs agrees well with the theoretical value computed from Landau-Zener probabilities.
Emission modes in electro co-flow
Authors: Guerrero J. , Hijano A. J. , Lobato M. A. , Higuera F. J. , Loscertales I. G. , Fernandez-Nieves A.
Published: August 2019

We apply an electric field to a moderately conducting liquid surrounded by another co-flowing liquid, all inside a glass-based microfluidic device, and study and classify the resulting emission modes. The viscosity and flow rate of the co-flowing liquid affect the number of modes observed in classical electrospray as well as their geometrical characteristics. In particular, we observe a two-dimensional whipping mode not described before. We also provide a qualitative description of some of the modes, including dripping, electrodripping, microdripping, the cone-jet mode, and both the two- and three-dimensional whipping modes.
Inclusive composite-interval mapping reveals quantitative trait loci for plant architectural traits in sorghum (Sorghum bicolor)
Authors: Zhang Huawen , Wang Runfeng , Liu Bin , Chen Erying , Yang Yanbing , Qin Ling , Li Feifei , Gao Fengju , Cao Pengpeng , Wang Hailian , Guan Yan'an
Published: August 2019

Architecture-efficient sorghum (Sorghum bicolor (L.) Moench) has erect leaves forming a compact canopy that enables highly effective utilisation of solar radiation; it is suitable for high-density planting, resulting in an elevated overall production. Development of sorghum ideotypes with optimal plant architecture requires knowledge of the genetic basis of plant architectural traits. The present study investigated seven production-related architectural traits by using 181 sorghum recombinant inbred lines (RILs) with contrasting architectural phenotypes developed from the cross Shihong 137 × L-Tian. Parents along with RILs were phenotyped for plant architectural traits for two consecutive years (2012, 2013) at two locations in the field. Analysis of variance revealed significant (P ≤ 0.05) differences among RILs for architectural traits. All traits showed medium to high broad-sense heritability estimates (0.43–0.94) and significant (P ≤ 0.05) genotype × environment effects. We employed 181 simple sequence repeat markers to identify quantitative trait loci (QTLs) and the effects of QTL × environment interaction based on the inclusive composite interval mapping algorithm. In total, 53 robust QTLs (log of odds ≥4.68) were detected for these seven traits and explained 2.11–12.11% of phenotypic variation. These QTLs had small effects of QTL × environment interaction and yet significant epistatic effects, indicating that they could stably express across environments but influence phenotypes through strong interaction with non-allelic loci. The QTLs and linked markers need to be verified through function and candidate-gene analyses. The new knowledge of the genetic regulation of architectural traits in the present study will provide a theoretical basis for the genetic improvement of architectural traits in sorghum.
Pilgrim tourist motivations in religious heritage, culture and art.
Authors: Lidén A.
Published: August 2019

This chapter focuses on the motivations of tourists to visit pilgrim destinations, thereby connecting medieval heritage, art and personal narratives. The chapter further illustrates the role of medieval pilgrim heritage, art and narrative, in modern management of pilgrim tourism in Scandinavia.
Chronic wasting disease and implications for cervid populations.
Authors: Ketz A. C. , Storm D. J. , Samuel M.
Published: August 2019

Chronic wasting disease (CWD) is a contagious prion disease affecting four species of free-ranging and captive cervids in North America. Geographic detection and distribution of CWD notably increased after 2002, although the disease has been present in North America since at least the 1960s. CWD is characterized by a prolonged course of individual infection, lengthy epizootics that last for decades, and delayed population effects until after prevalence has reached a sufficient level. We comprehensively reviewed and synthesized the available literature on CWD to assess the current state of the science on disease dynamics and population impacts. We examine transmission dynamics and mechanisms, geographic spread, infection patterns, genetics of hosts, disease effects on demographic rates and ultimately the effects on population growth rates. The early phase of a CWD epizootic is characterized by slowly increasing prevalence and geographic spread, but these eventually accelerate and lead to declines in survival and recruitment that drive population reductions. The threshold for these population impacts depends on species-specific demography, genetics, transmission and numerous factors influencing cervid infection and mortality. As prevalence and spread continue to accelerate, management actions to mitigate CWD impacts will be challenging, costly and will likely require changes in how we manage cervid populations.
Inflammation and necrosis syndrome (SINS) in swine.
Authors: Reiner G. , Lechner M.
Published: August 2019

Minimizing pain, suffering and damage are essential factors in animal welfare. However, swine inflammation and necrosis syndrome (SINS) leads to significant clinical findings of inflammation and necrosis at the extremities in pigs. Tail, ears, coronary bands, soles, heels, claw walls, navel and face are frequently included. Early symptoms include loss of bristles, redness and swelling and can develop into exudative inflammation and necrosis. A high proportion of pigs seem to be affected, and suckling piglets have been born with SINS. Significant differences in the expression of genes involved in metabolic pathways of the liver underline the importance of metabolism in the development and expression of SINS. The aim of the current review is to compile the most important factors of SINS and identify the most probable causes. Given the significant impairment of animal welfare caused by the lesions, there is an urgent need to raise awareness among pig farmers and to understand and counteract the multifactorial causality, including genetics, involved in SINS in swine.
Generating strong anti-bunching by interfering nonclassical and classical states of light
Authors: Boddeda Rajiv , Glorieux Quentin , Bramati Alberto , Pigeon Simon
Published: August 2019

In quantum optics, the second-order correlation function g
(2)(τ) characterizes the photon statistics of a state of light and can be used to distinguish between its classical or quantum nature. In this article, we study a simple setup which offers the possibility to generate quantum states of light with very small g
(2)(0), a signature of strong anti-bunched light. This can be achieved by mixing on a beamsplitter a coherent state with a nonclassical state, such as a squeezed state, and even with a bunched state (g
(2)(0) > 1) such as a Schrödinger cat state. We elucidate the interference mechanism generating such strong anti-bunching and relate it to the unconventional photon blockade. We also detail how this effect can be applied to detect weakly squeezed states of light.
In vivo measurement of pre-operational spallation source workers: baseline body burden levels and detection limits of relevant gamma emitters using high-resolution gamma spectrometry
Authors: Rääf Christopher L , Almén Anja , Johansson Lena , Stenström Kristina Eriksson
Published: August 2019

As a measure to prepare for long-term internal dose monitoring of workers at the European Spallation Source (ESS) in Lund, Sweden, operated by the European Research Infrastructure Consortium (ERIC), as well as to enhance emergency preparedness against accidental releases, a series of in vivo measurements were conducted using a high-resolution HPGe detector with a 123% relative efficiency (1.332 MeV). This study describes the whole-body counting set-up, calibration procedure, and subsequent validation measurements using conventional NaI(Tl)-scanning-bed geometry on a selection of workers from the ESS. Detection limits for the relevant gamma emitters 7Be, 172Hf, and 182Ta were determined to be 65 Bq, 130 Bq, and 22 Bq, respectively, using a 2400 s acquisition time. The baseline measurements suggest that care must be taken to ensure that the fluctuations in the presence of radon daughters 214Bi and 214Pb are minimised by, for example, ensuring a minimum air exchange between the measuring room and the ambient air, and by demanding that the measured subjects change clothes and shower before measurement. Furthermore, in a monitoring program for internal doses to spallation source workers, the presence of radionuclides originating from non-work-related sources (such as 226Ra from private water wells or 137Cs from intakes of Chernobyl contaminated foodstuffs), or radionuclides from previous work history (such as 60Co within the nuclear power industry), must be considered.
An x-ray regenerative amplifier free-electron laser using diamond pinhole mirrors
Authors: Freund H P , van der Slot P J M , Shvyd’ko Yu
Published: August 2019

X-ray free-electron lasers (FELs) rely on SASE due to the lack of seed lasers and the difficulty in obtaining mirrors. Progress in diamond crystal Bragg mirrors enables the design of x-ray FEL oscillators. Regenerative amplifiers (RAFELs) are high gain/low-Q oscillators that out-couple most of the optical power. An x-ray RAFEL based on the LCLS-II at SLAC using a six-mirror resonator out-coupling 90% or more through a pinhole in the first downstream mirror is analyzed using the MINERVA simulation in the undulator and OPC for the resonator. Results show substantial powers at the fundamental (3.05 keV) and 3rd harmonic (9.15 keV).
Collective transport of polar active particles on the surface of a corrugated tube
Authors: Ai Bao-Quan , Zhu Wei-Jing , Liao Jing-Jing
Published: August 2019

We study collective transport of polar active particles on the surface of a corrugated tube. Particles can be rectified on the surface of the asymmetric tube. The system shows different motion patterns which are determined by the competition between alignment strength and rotational diffusion. For a given alignment strength, there exist transitions from the circulating band state to the travelling state, and finally to the disordered state when continuously changing rotational diffusion. The circulating band is a purely curvature-driven effect with no equivalent in the planar model. The rectification is greatly improved in the travelling state and greatly suppressed in the circulating band state. There exist optimal parameters (modulation amplitude, alignment strength, rotational diffusion, and self-propulsion speed) at which the rectified efficiency takes its maximal value. Remarkably, in the travelling state, we can observe current reversals by changing translational diffusion.
Split spin-squeezed Bose–Einstein condensates
Authors: Jing Yumang , Fadel Matteo , Ivannikov Valentin , Byrnes Tim
Published: August 2019

We investigate and model a method for producing entanglement between two spatially separated Bose–Einstein condensates (BECs). In our approach, a spin-polarized BEC is squeezed using a (S

z
)2 interaction, then are split into two separate clouds. After the split, we consider that the particle number in each cloud collapses to a fixed number. We show that this procedure is equivalent to applying an interaction corresponding to squeezing each cloud individually plus an entangling operation. We analyze the system’s inter-well entanglement properties and show that it can be detected using correlation-based entanglement criteria. The nature of the states is illustrated by Wigner functions and have the form of a correlated squeezed state. The conditional Wigner function shows high degrees of non-classicality for dimensionless squeezing times beyond

1

/

N

, where N is the number of particles per BEC.
Theory and method of dual-energy x-ray grating phase-contrast imaging*
Authors: Rong Feng , Gao Yan , Guo Cui-Juan , Xu Wei , Xu Wei
Published: August 2019

The principle of dual-energy x-ray grating phase-contrast imaging (DEPCI) is clarified by using the theory of x-ray interference and Fresnel diffraction. A new method of retrieving phase from the two interferograms is proposed for DEPCI, and its feasibility is verified via simulation. Finally, the proposed method applied to DEPCI experiment demonstrates the effectiveness of the method. This paper lays the theoretical foundation for performance optimization of DEPCI and the further integration of DEPCI and computed tomography.
Benefit community promotes evolution of cooperation in prisoners’ dilemma game*
Authors: Wang Jianwei , He Jialu , Yu Fengyuan , Chen Wei , Wang Rong , Yu Ke
Published: August 2019

Exploring the emergence and maintenance of cooperation in social dilemma is valuable and it arises considerable concerns of many researchers. In this paper, we propose a mechanism to promote cooperation, called benefit community, in which cooperators linking together form a common benefit community and all their payoffs obtained from game are divided coequally. The robustness of conclusions is tested for the PDG (prisoners’ dilemma game) on square lattice and WS small world network. We find that cooperation can be promoted by this typical mechanism, especially, it can diffuse and prevail more easily and rapidly on the WS small world network than it on the square lattice, even if a big temptation to defect b. Our research provides a feasible direction to resolve the social dilemma.
Evolution of real contact area during stick-slip movement observed by total reflection method*
Authors: Luo Zhijun , Song Baojiang , Han Jingyu , Yan Shaoze
Published: August 2019

We build an experiment system based on total reflection (TR) method to observe the evolution of real contact area of polymethyl methacrylate (PMMA) in the continual stick-slip movement. The bilateral friction is adopted to overcome the bending moment in the lateral friction movement. Besides some classical phenomena of stick-slip movement such as periodical slow increase of frictional force in sticking phase and a sudden drop when slipping, a special phenomenon that the contact area increases with the tangential force is observed, which was called junction growth by Tabor in 1959. Image processing methods are developed to observe the variation of the junction area. The results show that the center of the strongest contact region will keep sticking under the tangential force until the whole slipping, the strongest point undergoes three stages in one cycle, which are named as sticking stage, fretting stage, and cracking stage, respectively. The combined analysis reveals a physical process of stick-slip movement: the tangential force causes the increase of the real contact area, which reduces the pressure between the contact spots and finally leads to the slipping. Once slipping occurs, the real contact area drops to the original level resulting in the pressure increase to the original level, which makes the sticking happen again.
Properties of multi-Gaussian Schell-model beams carrying an edge dislocation propagating in oceanic turbulence*
Authors: Liu Da-Jun , Wang Yao-Chuan , Wang Gui-Qiu , Yin Hong-Ming , Zhong Hai-Yang
Published: August 2019

Based on the theory of coherence, the model of multi-Gaussian Schell-model (MGSM) beams carrying an edge dislocation generated by the MGSM source is introduced. The analytical cross-spectral density of MGSM beams carrying an edge dislocation propagating in oceanic turbulence is derived, and used to study the evolution properties of the MGSM beams carrying an edge dislocation. The results indicate that the MGSM beam carrying an edge dislocation propagating in oceanic turbulence will evolve from the profile with two intensity peaks into a flat-topped beam caused by the MGSM source, and the beam will evolve into the Gaussian-like beam due to the influences of oceanic turbulence in the far field. As the propagation distance increases, the MGSM beam carrying an edge dislocation propagating in oceanic turbulence with the larger rate of dissipation of mean-squared temperature (

χ

T

) and ratio of temperature to salinity contribution to the refractive index spectrum (ς) or the smaller rate of dissipation of kinetic energy per unit mass of fluid (ε) evolves into the flat-topped beam or a Gaussian beam faster.
Numerical investigation on coherent mid-infrared supercontinuum generation in chalcogenide PCFs with near-zero flattened all-normal dispersion profiles*
Authors: Han Jie , Chang Sheng-Dong , Lyu Yan-Jia , Liu Yong
Published: August 2019

We design a novel all-normal flat near-zero dispersion chalcogenide photonic crystal fiber (PCF) for generating mid-infrared (MIR) supercontinuum (SC). The proposed PCF with a core made of As2Se3 glass and uniform air holes in the cladding is selectively filled with As2S5 glass. By carefully engineering the PCF with an all-normal flat near-zero dispersion profile, the anomalous-dispersion soliton effect is reduced, thus enabling broadband highly coherent SC to be generated. We also investigate the influence of the pulse parameters on the SC generation. Broadband SC covering

1.4

μ
m
−
10

μ
m

with perfect coherence is achieved by pumping the proposed 3-cm-long PCF with 3-

μ
m

100-fs pulses. The results provide a potential all-fiber realization of the broadband coherent MIR-SC.
Stabilized seventh-order dissipative compact scheme for two-dimensional Euler equations*
Authors: Qin Jia-Xian , Chen Ya-Ming , Deng Xiao-Gang
Published: August 2019

We derive in this paper a time stable seventh-order dissipative compact finite difference scheme with simultaneous approximation terms (SATs) for solving two-dimensional Euler equations. To stabilize the scheme, the choice of penalty coefficients for SATs is studied in detail. It is demonstrated that the derived scheme is quite suitable for multi-block problems with different spacial steps. The implementation of the scheme for the case with curvilinear grids is also discussed. Numerical experiments show that the proposed scheme is stable and achieves the design seventh-order convergence rate.
Extraordinary transmission and reflection in

PT

-symmetric two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios*
Authors: Wu Jia-Ye , Wu Xu-Hang , Yang Xiang-Bo , Li Hai-Ying
Published: August 2019

By adjusting the waveguide length ratio, we study the extraordinary characteristics of electromagnetic waves propagating in one-dimensional (1D) parity-time-symmetric (

PT

-symmetric) two-segment-connected triangular optical waveguide networks with perfect and broken integer waveguide length ratios respectively. It is found that the number and the corresponding frequencies of the extremum spontaneous

PT

-symmetric breaking points are dependent on the waveguide length ratio. Near the extremum breaking points, ultrastrong extraordinary transmissions are created and the maximal can arrive at, respectively,

2.4079
×

10

14

and

4.3555
×

10

13

in both kinds of networks. However, bidirectional invisibility can only be produced by the networks with broken integer waveguide length ratio, whose mechanism is explained in detail from the perspective of photonic band structure. The findings of this work can be useful optical characteristic control in the fabrication of

PT

-symmetric optical waveguide networks, which possesses great potential in designing optical amplifiers, optical energy saver devices, and special optical filters.
Effect of sintering temperature on luminescence properties of borosilicate matrix blue–green emitting color conversion glass ceramics*
Authors: Zheng Qiao-Yu , Li Yang , Wu Wen-Juan , Shi Ming-Ming , Yang Bo-Bo , Zou Jun
Published: August 2019

The color conversion glass ceramics which were made of borosilicate matrix co-doped (SrBaSm)Si2O2N2: (Eu3+Ce3+) blue–green phosphors were prepared by two-step method in co-sintering. The change in luminescence properties and the drift of chromaticity coordinates (CIE) of the (SrBaSm)Si2O2N2: (Eu3+Ce3+) blue–green phosphors and the color conversion glass ceramics were studied in the sintering temperature range from 600 °C to 800 °C. The luminous intensity and internal quantum yield (QY) of the blue–green phosphors and glass ceramics decreased with the sintering temperature increasing. When the sintering temperature increased beyond 750 °C, the phosphors and the color conversion glass ceramics almost had no peak in photoluminescence (PL) and excitation (PLE) spectra. The results showed that the blue–green phosphors had poor thermal stability at higher temperature. The lattice structure of the phosphors was destroyed by the glass matrix and the Ce3+ in the phosphors was oxidized to Ce4+, which further caused a decrease in luminescent properties of the color conversion glass ceramics.
Estimation of Beta-Adjusted Parameters in Capital Asset Pricing Model under Non-Constant Volatility
Authors: Sukono  , Hasbullah Endang Soeryana , Hidayat Yuyun , Subiyanto
Published: August 2019

The Capital Asset Pricing Model (CAPM) standard equation states that the equilibrium of the capital market will be indicated by the stock market (asset) line, where the line connects risk-free investment opportunities and risky investments. The beta parameter coefficient in the CAPM is a measure of systematic risk in the capital market, whose value must be estimated accurately.In this paper, we will examine the beta-adjusted parameter estimation when the market index return has a constant volatility. Non-constant volatility in the return of the market index was analyzed using generalized autoregressive conditional heteroscedastic (GARCH) models. Furthermore, using beta estimators, average beta estimator values, and beta estimator volatility, are used to predict the future beta-adjusted coefficient.Such an assessment method is used to analyze several stocks traded on the Indonesia Stock Exchange (IDX). The results show that the beta-adjusted estimator under volatility is not constant in accordance with actual market conditions. So that it can be considered in estimating beta-adjusted in the capital market.
Improving Mathematical Beliefs of Pre-service Teacher Trough Valsiner Zone Learning
Authors: Tirto S , Herman T , Turmudi
Published: August 2019

This study aims to comprehensively analyze the increase in mathematical beliefs of pre-service teacher of mathematics education at Siliwangi Tasikmalaya University through learning based on the Valsiner Zone in total and based on Mathematical Preliminary Ability (MPA). The method used in this research is quasi experiment, with research population that is pre-service teacher of mathematics education at Siliwangi University of Tasikmalaya and the sample is student who follow course of probability theory in semester V consisting of one experiment class with amount of 42 people and one control class which amounted to 40 people in the Mathematics Education Study Program. Random sampling by class. Data collection techniques are questionnaires of mathematical belief scale. Descriptive analysis there is an improvement of mathematical belief of student in probability theory course, both at theory valsiner class and control class. Further improvement in student mathematical belief with theory valsiner class modeling was higher than that of control class, from the average gain of normalized students in upper, middle and lower MPA categories in the experimental group compared with the mean of normalized student gain in upper, middle and lower MPA categories with the control group although both groups were in the moderate category.
Warning Button Crime System in Supporting the Management of Public Services in the Legal Area of Polres Kota Tangerang
Authors: Sunarya Po Abas , Roihan Ahmad , Aryani Diah , Rifa’i Annas
Published: August 2019

The integrated police service center (SPKT) is the place for managing public services in the form of receiving reports and handling the first reports and complaints from the public. The issue of technological development is also included in the criteria of police services in supporting the management of public services in order to obtain information and solve problems quickly and accurately. Therefore, there needs to be innovation in the public reporting service system in the area of Polres Kota Tangerang. The Warning Button Crime System is a tool that can make it easy for people to contact the police when a crime occurs. This tool consists of two parts, namely the transmitter side which is stored in the strategic area and the other side is the receiver stored in the police station. By utilizing the Arduino nano and uno microcontroller which is connected to the SIM 800L Module, it can function to send a message to the Polres Kota Tangerang, with the aim of being able to provide services easily to the public in notifying and reporting criminal acts or anything else to the police. So that the police are able to know more about the location of the incident correctly and can take preventive actions to overcome it. The management of changes made within this police institution can improve performance efficiently and effectively towards the achievement of objectives to ensure public security.
Task Analysis of Facebook users on Frequently used Menus
Authors: Setiawan Agus , Artha Emilya Ully , Arumi Endah Ratna , Sunarni  , Primadewi Ardhin , Nugroho Setiya
Published: August 2019

This paper presents case studies of tasks Facebook users on frequently used menus. 40 respondents involved in testing this analysis task. The respondents use the device they used to use their mobiles to perform some assigned tasks. The completion of this task is timed and then reported. The results of this study are the shortest time to complete the task on the Facebook menu is the task “Like & Comment”, where the required time average 10.72 seconds.
Sales and Marketing Models of SMEs Products through Online Marketing
Authors: Sulistiyo S Dedi
Published: August 2019

This study aims to analyze Online Marketing, sales and marketing of SMEs, the implications for online purchases trust with a positive impact and tested partially, and simultaneously. In this study the methods used are quantitative methods, and to analyze them using multiple linear regression. Variables measured include: Online marketing, sales and marketing of SMEs as independent variables and online purchasing trust as the dependent variable. The object of this study is the SMEs actors as an analysis unit. This study uses data sampling techniques by means of a saturated random sampling of 100 data from respondents of SMEs. The statistical analysis used in this study is testing classical assumptions and testing the independence, linearity and correlation hypotheses. The results show significant influence on Online Marketing, sales and marketing of SMEs, and online purchase trust. Online Marketing variables, sales and marketing of SMEs have implications for online purchase trust both partially and simultaneously.
Comparative Analysis of Gaudy Booch and Ivar Jacobson Methods in Mercu Buana Mobile Application Database Design
Authors: Ranggadara I , Sfenrianto
Published: August 2019

Attendance, presence, or attendance recording is very important for every lecture, office or other organizational activities. Currently, recording student attendance activities at Mercu Buana University is by calling one by one the students by the lecturer, then the lecturer signs attendance on the special application form for lecturers that have been provided. For this reason, it is necessary to design a database to create the database. The analysis used is SWOT to compare between Gaudy Booch and Ivan Jacobson methods. This comparison is used to find out which method is appropriate in implementing a better database. Based on the database design that is made to further facilitate archiving of attendance, increase data efficiency. From the results of the research with class diagram description objects, the class diagram and database model that we use is from Ivar Jacobson, because it shows how actors from class diagrams point to Object-Oriented Software Engineering that has advantages that are easy to learn and have notation simpler.
Measurement of Performance Value for New Student Admission Information Systems
Authors: Taufiq Muhammad , Anggarasari Nandhini Hudha , Mirawati
Published: August 2019

New Student Admission for Universities is the frontline in recruiting new students, therefore the New Student Admission performance needs to be measured to provide excellent service for prospective students as consumers who achieve customer satisfaction values, and for that it requires proportional and professional use of Information Technology, so that it is fulfilled speed and acceleration in winning market competition, and this is inseparable from the quality of information produced from a New Student Admissions Information System, while measurements are made using the Time Motion Study method, which measures the time needed to complete one type of activity in a given period (T) in the form of measurement of productivity time (tp) and response time (tr), so that productivity volumes can be known. This measurement is expected to provide an increase in the value of the University in society in general as well as an increase in the accreditation of the University in particular, as a result of which has an impact on the selling value of the products of the wider community.
The Development of Movie Scenario on Thematic Learning Process Based on Local Culture
Authors: Oktavianti I , Nugraha F , Ratnasari Y , Zuliana E
Published: August 2019

This research aims to produce the thematic learning scenario based on local culture focussed on occupation theme. The development of movie scenario thematic learning purpose to give direct learning experience, the learning scenario used local culture around the students. The research method used in this research was research method and development with 4-D model by using descriptive analysis technique as the analysis technique. The development of learning movie scenario was only on stage of define, design, and develop. The define stage was the basic competence analysis of occupation theme and local culture material. The design stage was the stage that design the lesson plan and teaching material for all kinds of occupation based on local culture, then designed thematic learning movie scenario based on the local culture. The develop stage was the stage that developed the learning scenario by involving the experts of curriculum 2013 thematic learning, local culture material, learning media, learning movie, teachers, and conducting limited trials. The result of the research showed that the scenario of learning movie was very decent to be used which the validation from the experts of thematic learning, local culture material, learning media, and learning movie.
Let’s Listen Through WhatsApp: An energizing listening exercise in EFL Class
Authors: Setyowati Yulis
Published: August 2019

This research is focused on analyzing the impact on the use of ‘WhatsApp’ as a media to develop listening skill for a group of 26 ten-grade senior high school students. Since the phenomenal booming about the tremendous use of smartphone in real-life among teenagers which might bring negative effects, it is urgent to empower the phenomenal behavior of teenagers toward their mobile phone in the context of language learning. The 26 ten grade senior high students were put in ‘WhatsApp’ group messenger. The learning activities were performed in ‘virtual’ ‘WhatsApp’ group class called ‘Fun In English’. The one-group pretest-posttest design was implemented in this study. The instruments used in this study were 1) learning activities 2)English comprehension tests (pretest and posttest) and 3) a questionnaire and interview of the students ‘response. Regarding the data analysis, mean, percentage and t-test scores for the dependent sample were employed. The result indicated that 1) the students’ English listening comprehension ability increased significantly after learning with MP3 which uploaded in ‘WhatsApp’ group called ‘Fun In English’. 2) the questionnaires told that the students reflected a good response. The mean score of pre-test was 6,9 then mean score of posttest was 8,7 which means that there is a significant increasing score. The students’ score were increased after the treatment which is the students was given learning activities through ‘WhatsApp’ group exercises. Thus, the learning model is confirmed to be effective and powerful. The students gave their response through questionnaires that reflected their enthusiasm, intimate interaction, and enjoyable learning activities.