bluuebunny/crossref_metadata_2025 huggingface dataset:
Multiquery Motion Planning in Uncertain Spaces: Incremental Adaptive Randomized Roadmaps
Authors: Khaksar Weria , Uddin Md Zia , Torresen Jim
Published: January 2020

Sampling-based motion planning is a powerful tool in solving the motion planning problem for a variety of different robotic platforms. As its application domains grow, more complicated planning problems arise that challenge the functionality of these planners. One of the main challenges in the implementation of a sampling-based planner is its weak performance when reacting to uncertainty in robot motion, obstacles motion, and sensing noise. In this paper, a multi-query sampling-based planner is presented based on the optimal probabilistic roadmaps algorithm that employs a hybrid sample classification and graph adjustment strategy to handle diverse types of planning uncertainty such as sensing noise, unknown static and dynamic obstacles and an inaccurate environment map in a discrete-time system. The proposed method starts by storing the collision-free generated samples in a matrix-grid structure. Using the resulting grid structure makes it computationally cheap to search and find samples in a specific region. As soon as the robot senses an obstacle during the execution of the initial plan, the occupied grid cells are detected, relevant samples are selected, and in-collision vertices are removed within the vision range of the robot. Furthermore, a second layer of nodes connected to the current direct neighbors are checked against collision, which gives the planner more time to react to uncertainty before getting too close to an obstacle. The simulation results for problems with various sources of uncertainty show a significant improvement compared with similar algorithms in terms of the failure rate, the processing time and the minimum distance from obstacles. The planner is also successfully implemented and tested on a TurtleBot in four different scenarios with uncertainty.
A Conservative Scheme with Optimal Error Estimates for a Multidimensional Space–Fractional Gross–Pitaevskii Equation
Authors: Hendy Ahmed S. , Macías-Díaz Jorge E.
Published: January 2020

The present work departs from an extended form of the classical multi-dimensional Gross–Pitaevskii equation, which considers fractional derivatives of the Riesz type in space, a generalized potential function and angular momentum rotation. It is well known that the classical system possesses functionals which are preserved throughout time. It is easy to check that the generalized fractional model considered in this work also possesses conserved quantities, whence the development of conservative and efficient numerical schemes is pragmatically justified. Motivated by these facts, we propose a finite-difference method based on weighted-shifted Grünwald differences to approximate the solutions of the generalized Gross–Pitaevskii system. We provide here a discrete extension of the uniform Sobolev inequality to multiple dimensions, and show that the proposed method is capable of preserving discrete forms of the mass and the energy of the model. Moreover, we establish thoroughly the stability and the convergence of the technique, and provide some illustrative simulations to show that the method is capable of preserving the total mass and the total energy of the generalized system.
An Lmi–Based Heuristic Algorithm for Vertex Reduction in LPV Systems
Authors: Sanjuan Adrián , Rotondo Damiano , Nejjari Fatiha , Sarrate Ramon
Published: January 2020

The linear parameter varying (LPV) approach has proved to be suitable for controlling many non-linear systems. However, for those which are highly non-linear and complex, the number of scheduling variables increases rapidly. This fact makes the LPV controller implementation not feasible for many real systems due to memory constraints and computational burden. This paper considers the problem of reducing the total number of LPV controller gains by determining a heuristic methodology that combines two vertices of a polytopic LPV model such that the same gain can be used in both vertices. The proposed algorithm, based on the use of the Gershgorin circles, provides a combinability ranking for the different vertex pairs, which helps in solving the reduction problem in fewer attempts. Simulation examples are provided in order to illustrate the main characteristics of the proposed approach.
An Adaptive Identification Method Based on the Modulating Functions Technique and Exact State Observers for Modeling and Simulation of a Nonlinear Miso Glass Melting Process
Authors: Byrski Witold , Drapała Michał , Byrski Jȩdrzej
Published: January 2020

The paper presents new concepts of the identification method based on modulating functions and exact state observers with its application for identification of a real continuous-time industrial process. The method enables transformation of a system of differential equations into an algebraic one with the same parameters. Then, these parameters can be estimated using the least-squares approach. The main problem is the nonlinearity of the MISO process and its noticeable transport delays. It requires specific modifications to be introduced into the basic identification algorithm. The main goal of the method is to obtain on-line a temporary linear model of the process around the selected operating point, because fast methods for tuning PID controller parameters for such a model are well known. Hence, a special adaptive identification approach with a moving window is proposed, which involves using on-line registered input and output process data. An optimal identification method for a MISO model assuming decomposition to many inner SISO systems is presented. Additionally, a special version of the modulating functions method, in which both model parameters and unknown delays are identified, is tested on real data sets collected from a glass melting installation.
An Automatic Collision Avoidance Algorithm for Multiple Marine Surface Vehicles
Authors: Hedjar Ramdane , Bounkhel Messaoud
Published: January 2020

In recent years, unmanned surface vehicles have been widely used in various applications from military to civil domains. Seaports are crowded and ship accidents have increased. Thus, collision accidents occur frequently mainly due to human errors even though international regulations for preventing collisions at seas (COLREGs) have been established. In this paper, we propose a real-time obstacle avoidance algorithm for multiple autonomous surface vehicles based on constrained convex optimization. The proposed method is simple and fast in its implementation, and the solution converges to the optimal decision. The algorithm is combined with the PD-feedback linearization controller to track the generated path and to reach the target safely. Forces and azimuth angles are efficiently distributed using a control allocation technique. To show the effectiveness of the proposed collision-free path-planning algorithm, numerical simulations are performed.
Password–Authenticated Group Key Establishment from Smooth Projective Hash Functions
Authors: Bohli Jens-Matthias , González Vasco María Isabel , Steinwandt Rainer
Published: January 2020

Password-authenticated key exchange (PAKE) protocols allow users sharing a password to agree upon a high entropy secret. Thus, they can be implemented without complex infrastructures that typically involve public keys and certificates. In this paper, a provably secure password-authenticated protocol for group key establishment in the common reference string (CRS) model is presented. While prior constructions of the group (PAKE) can be found in the literature, most of them rely on idealized assumptions, which we do not make here. Furthermore, our protocol is quite efficient, as regardless of the number of involved participants it can be implemented with only three communication rounds. We use a (by now classical) trick of Burmester and Desmedt for deriving group key exchange protocols using a two-party construction as the main building block. In our case, the two-party PAKE used as a base is a one-round protocol by Katz and Vaikuntanathan, which in turn builds upon a special kind of smooth projective hash functions (KV-SPHFs). Smooth projective hash functions (SPHFs) were first introduced by Cramer and Shoup (2002) as a valuable cryptographic primitive for deriving provable secure encryption schemes. These functions and their variants proved useful in many other scenarios. We use here as a main tool a very strong type of SPHF, introduced by Katz and Vaikuntanathan for building a one-round password based two party key exchange protocol. As evidenced by Ben Hamouda et al. (2013), KV-SPHFs can be instantiated on Cramer–Shoup ciphertexts, thus yielding very efficient (and pairing free) constructions.
Measurements of Galvanic Skin Response on Subjects Affected by Stress
Authors: Dascălu Loredana Cristina , Babiș Claudiu , Chivu Oana , Iacobescu Gabriel , Alecusan Ana Maria , Semenescu Augustin
Published: January 2020

The aim of the present paper is to study the Galvanic Skin Response (GSR) level on subjects affected by stress. The device that we have used, connects to the people by finger electrodes to record GSR. The purpose was to find statistical differences between the activities (mental task, walking, sitting and to fill out a survey about their lives) and their stress level. During the experiment, it was found that the survey caused the source of high stress and increasing skin conductance was caused by sweat secretion (mental, physical activity). Is needed to work of collecting data from more subjects because GSR is depended on human behaviour, is variable upon many factors (their eating habits, their emotional state, their gender, their relationship with family, etc) and we need to build a substantial data set for a valid research.
Determination of the Number of Objects through Weight and Image Processing
Authors: Iamandi-Gido Laura-Diana , Neghină Mihai
Published: January 2020

Estimating the number of identical objects is a fundamental recognition task that requires exhaustive human effort. Automating this task in a warehouse would reduce the human load significantly. In this paper, we propose a method to automatically detect the number of objects, requiring only low-tech hardware and low-processing software, in a manner that provides optimal performance for the needed tasks. This method combines the physical weight of objects and simple image processing that do not require complicated operations, such as the detection of objects and their locations or the extraction of object figures. The experimental results demonstrate the increased effectiveness of the proposed method compared to methods based on weight alone or on image processing alone.
Methods of Academic Education in the Field Occupational Safety and Health - Analysis of Applied Solutions in the Opinion of Students, Employees and Employers
Authors: Lis Tomasz
Published: January 2020

Methods of education applied at universities have a direct impact on matching of knowledge, skills, but also on the approach to the professional sphere of graduates, in relation to the needs and requirements of employers. It is particularly important in the case of Occupational Safety and Health field of study. Using the available means of technical and informational support of education, one should concentrate on shaping individual thinking. In times of rapid technological development, it is not the duplication that counts, but the creative thinking that must be accompanied by the ability to work in a group. And in this direction, according to the author, academic education should pursue. In the publication, the author analyses the applied methods of education. For this purpose, the results of the study of the participant’s observation, direct interviews with employees and employers, as well as the results of a survey conducted among students of the Czestochowa University of Technology, will be used. The analysis will be carried out in terms of the evaluation of applied methods of education - quality, usefulness, adjustment to expectations (students and employers), attractiveness of form and content.
Numerical Study of a Process Strategy for Improving Geometrical Accuracy in Incremental Forming Process
Authors: Popp Mihai-Octavian , Oleksik Mihaela , Racz Sever-Gabriel , Rusu Gabriela-Petruța
Published: January 2020

Incremental forming process is a relatively new process among researchers, which is yet to be implemented in automotive and aerospace industries. The researchers are studying various process strategies and methods to improve the geometrical accuracy of the parts obtained by incremental forming, because the geometry of the parts is one of the key factors holding back the process industrialization. One good method to investigate the benefits of a process strategy is by means of numerical analysis, from which the results obtained can confirm or disprove the gains of the researched strategy. The aim of this paper is to present the advantages of using a fluid under pressure as a supporting die instead of using a conventional fixed backing plate for the single point incremental forming process.
Study of Phonic Pollution Produced by Car Traffic in Petrosani
Authors: Tataru Andreea Cristina , Stanci Aurora
Published: January 2020

One of the most recent global environmental problems is noise pollution. Noise pollution is a component of environmental pollution. Like any other type of pollution, noise pollution has negative effects on environmental factors. The main sources of noise are: industry, urban areas and transport. To reduce the level of noise pollution is necessary to determine the pollution sources that cause. In this paper we will study the main areas affected by the noise pollution caused by the traffic in the city of Petrosani. We will also present solutions for reducing the pollution of the affected areas in Petrosani.
Assessment of bio-agent (Trichoderma Harzianum) in the management of two pepper varieties infected with root-knot nematode (Meloidogyne Incognita)
Authors: Izuogu N. B. , Baba H. S. , Winjobi E. O.
Published: January 2020

Two field trials were carried out at the Teaching and Research Farm of the University of Ilorin in the 2012 and 2014 planting seasons to find out the effeciency of Trichoderma harzianum as a bio-control agent in controlling root-knot nematode (Meloidogyne incognita) in two pepper varieties (F1 Nikita and Gianfranco Fuscello). A 2 × 2 factorial design fitted into a randomized complete block design (RCBD) was used with 5 replications. The T. harzianum filtrate significantly increased plant height, number of leaves, and yield. The control showed higher root galling and soil nematode population. Varietal differences showed that F1 Nikita performed significantly better than G. Fuscello. The combination of Trichoderma and F1 Nikita appears effective for managing root-knot nematodes.
From tradition to landscape architecture – Planting design concept using perennials and bulbs
Authors: Székely-Varga Zsolt , Hitter Buru Timea , Cotoz Alex-Peter , Buta Erzsébet , Cantor Maria
Published: January 2020

“Tradition and Modernity”, two aspects the University of Agriculture Sciences and Veterinary Medicine of Cluj-Napoca lives by. The current paper presents a case study analysis of a landscape architecture design, combining tradition with modernity. Through the use of traditional Transylvanian patterns, this concept design is based on the use of different plant species and flowering periods. It measures 500 sq. m and is situated on the campus of the UASVM. Today, there is an increasing interest for bulbs and Lavandula species in landscaping. This is the reason why Lavandula is popular in the design concept presented below. Designed with the use of Romanian traditional patterns and specific colours, two types of ornamental plants are combined: perennials and bulbous plants. This proposal attempts to provide a way of approaching the Romanian landscape, specific to the region it belongs to.
Evaluation of industrial tomato genotypes in open-field production
Authors: Tóth Anna Rita , Rubóczki Tímea , Takácsné Hájos Mária
Published: January 2020

Recently, industrial tomato production in Hungary shows an increasing tendency after a weak processing period. However, to maintain the cultivation profitable, the use of proper technology and genotype is indispensable.

In the experiment, five hybrids and one variety were evaluated in a plot experiment design on open field. The main objective was to evaluate the fruit quality of different genotypes and to determine the suitability for mechanical harvest.

According to the results, Heinz 1015 F

1
and Heinz 9478 F

1
had the best fruit quality for industrial processing.

Nowadays, the use of hybrids with good adaptability and resistance properties is important for a profitable production.
Colostrum composition of cows after twin- and triplet-calving
Authors: Csapó J. , Albert Cs. , Bakos G. , Nagy Á. , Szabari M. , Stefler J.
Published: January 2020

Earlier we determined the colostrum and milk composition of cows after single- and twin-calving as well as the changes in the composition as a function of postpartum time. It was established that the dry matter, protein, whey protein, and immunoglobulin-G (IgG) content of the first-milked colostrum immediately after calving was significantly higher with twin-calving cows than with single-calving animals. As regards the other components, there were no significant differences among the animals. During the last years, we managed to collect the first-milked colostrum from five cattle after triplet-calving. The composition of these samples were determined by the methods we used earlier at twin-calving animals, and the results were compared to the colostrum composition of single- and twin-calving animals. It was found that although as an effect of triplet-calving the protein and IgG content of colostrum increased, the difference was not significant between twin- and triplet-calving animals. We are aware that others have not reported data from the point of view of the colostrum composition of twin-calving, and in the case of tripletcalving our results are unique in the world. In our publication, we report on the results of our investigations.
Diachronic patterns of usage of no doubt in the English Historical Book Collection (EEBO, ECCO and EVANS)
Authors: Smith Chris A.
Published: January 2020

This study offers a collocate analysis of the modal marker no doubt (ND) in the EEBO, ECCO and EVANS combined corpora using Sketch Engine. The purpose is to determine the diachronic patterns of usage of ND, and secondly to compare results with the conclusions of existing diachronic pragmatic studies of modal markers. The first step identified five patterns of behaviour based on AM score in decreasing order of frequency: 1 – NDB (no doubt but); 2 – TISND (there is no doubt); 3 – MND (make no doubt); 4 – (ND (parenthetical use); 5 – Ndont (no doubt on’t). The second step consisting in partitioning of the corpus following Hilpert and Gries (2016) produced 3 distinct periods based on EHBO data (1580-1669, 1670-1759, 1760-1799). The findings showed that the relative usage of ND for each period remained remarkably consistent, especially the persistence of non-grammaticalized behaviours MND and TISN. The two major disparities, concerning NDont and parenthetical (ND, were shown to be of likely significance for the changing pragmatic behaviour of ND, which further diachronic study may be able to ascertain.
The Problem of Alternative Financing Source Management – The Equity Crowdfunding Case
Authors: Motylska-Kuźma Anna
Published: January 2020

The main objective of this paper is to analyze one of the alternative sources of financing - equity crowdfunding - from the point of view of managerial processes. Based on the case study analysis and the comparative analysis the problems and challenges of raising funds using equity crowdfunding are discussed, comparing the findings with the issuing of shares. The analysis show that although many of the activities undertaken in raising funds through issuing shares and equity crowdfunding are similar, the managerial processes in the case of equity crowdfunding require from the company first of all building and caring about relationships with investors, rather than showing and proving effectiveness. In exchange for the low legal requirements, the equity crowdfunding investors expect good communication even if the promises are not fulfilled.
Misinformation About Dividend Payouts Influences Transaction Prices in Experimental Asset Markets
Authors: Polak Mateusz , Polczyk Romuald
Published: January 2020

AIMS: The paper investigates the effects of misinformation regarding dividend payouts on bubble formation, asset pricing and individual investment returns in experimental asset markets, when correct information about the expected dividends and their probabilities is also available.

METHOD: In two experiments, totaling34 Smith-Suchanek-Williams type double-auction continuous experimental markets (238 subjects), participants were exposed to misinformation regarding dividend payouts in a previous game, with the correct dividend matrix also provided. The misinformation stated the dividends in the previous game to have been much lower or much higher than according to the expected value function. The misinformation was either homogenous for all participants or provided to only half of the investors in a market (heterogeneously).

RESULTS:Homogenous misinformation stating that the last game’s dividend payouts were high, led to larger overpricing throughout the game, as compared to baseline (no misinformation) and homogenous misinformation stating that the last game’s dividends were low. In informationally heterogeneous markets, where half of the participants received “high dividends” misinformation and half remained non-misinformed, transaction prices were the lowest compared to the aforementioned treatments. It was also discovered that agents receiving the ‘high dividend’ misinformation had lower returns than non-misinformed participants in the same heterogeneous market.
Exhumation of Danish astronomer Tycho Brahe: verification of identity and determination of cause of death
Authors: Velemínský Petr , Dobisíková Miluše , Kuželka Vítězslav , Havelková Petra , Kaupová Sylva Drtikolová , Brůžek Jaroslav
Published: January 2020

Tycho Brahe, noted Danish astronomer and founder of modern astronomy died in Prague in 1691, at the age of 54, and was buried in the Church of the Virgin Mary before Týn. In 2010, at the request of Danish authorities, his remains were exhumed and an investigation into the cause of his death was undertaken, with an aim to addressing speculations of him having been poisoned. This report contains detailed information on the process of the exhumation and results of the subsequent investigation. An anthropological analysis confirmed the authenticity of the remains, that they are actually those of Tycho Brahe, and confirmed the results of an earlier exhumation, done in 1901. Physical chemistry analysis was unable to confirm a lethal or sub-lethal dose of heavy metal poison (Hg). A detailed paleopathological analysis of the skeleton confirmed that Brahe suffered from DISH (diffuse idiopathic skeletal hyperostosis), which attends Type II diabetes, high blood pressure and obesity (the metabolic syndrome). From period documents describing Tycho Brahe’s lifestyle and his last days, it seems likely that he died of complications resulting from these conditions, today described as diseases of affluence, also referred to as “Western disease”.
Primates in the Caribbean: Monkeys’ Histoire in a 16th-century French manuscript
Authors: Urbani Bernardo
Published: January 2020

This work examines the historical context and implications of the accounts on nonhuman primates reported in the
Histoire Naturelle des Indes
,
circa
1586. It is a fundamental document for the understanding of Caribbean natural history. It shows color illustrations and descriptions of different animals, including primates such as
Sapajus flavius
(or
S. apella
cf.
margaritae.
),
Callithrix
sp., and
Alouatta palliata
. This document offers early reports of monkeys in the circum-Caribbean region.
Rediscovery of Coelostoma thienemanni (Coleoptera: Hydrophilidae): the first record from continental Asia and correction of its subgeneric assignment
Authors: Fikáček Martin , Skale Andre , Jia Feng-Long
Published: January 2020

We are reporting a recent discovery of
Coelostoma
(
Lachnocoelostoma
)
thienemanni
Orchymont, 1932 (Coleoptera: Hydrophilidae: Sphaeridiinae: Coelostomatini) from northern Vietnam, which represents the first record of the species since 1929 and its first record from continental Asia. The species is redescribed and illustrated, and transferred from the subgenus
Holocoelostoma
Mouchamps, 1958 to
Lachnocoelostoma
Mouchamps, 1958. The species is unusual among Asian
Coelostoma
by its complex three-dimensional shape of the median lobe of the aedeagus, in which it is only similar to
C. tangliangi
Jia
et al
., 2017 in Asia. The species is also unusual by its very long dorsal tarsal swimming hairs, indicating that it is an aquatic species.
Age Management: What Can we Learn from High-End Luxury Fashion Designer with More than 50 Years of Working Experience?
Authors: Grah Barbara , Perme Ema , Colnar Simon , Penger Sandra
Published: January 2020

Background and Purpose: While the world population is aging, the aim of this study is to bring new knowledge into age management research by investigating the most important factors that encourage older employees to remain in the labour market longer, also after meeting the official retirement age, based on an in-depth qualitative case study of the high-end luxury fashion designer with more than 50 years of working experience.

Design/Methodology/Approach: We conducted an inductive case study in fashion industry. Specifically, our case study is build based on the content analysis of secondary data as well as an in-depth interview with the general manager in the fashion and high-end luxury industry in Slovenia.

Results: The proposed conceptual model shows key facets, as assigned overarching categories, namely-vitality, intrinsic motivation, adapting, lifelong learning, and positive emotions and therefore contributes to the age management phenomena. Within the presented case study, we found out that the selected facets are the most important factors for the encouragement to remain in the labor market and to ensure flexible retirement processes in dealing with the challenges of an aging population and workforce.

Conclusion: Our study contributes to the theory and practice of age management by narrowing our focus on the best practice from selected high-end luxury fashion industry designer in Slovenia. What can we learn from high-end luxury fashion designer with more than 50 years of working experience? As the presented case study cannot be generalized to population, the presented case contributes to the field of age management and empowers people to rethink and stay active after meeting the official retirement age.
Methodology of reconstruction of the Old-Polish road network as exemplified by the historic Lublin Voivodship
Authors: Zawadzki Mateusz
Published: January 2020

The aim of the author is to present the methodology of reconstruction of the Old-Polish transport network as exemplified by the historic Lublin Voivodship. The author discusses the research method and procedure of reconstructing the road routes and locations of transport facilities on the basis of text sources and old maps of varied content and geometric accuracy. The adopted methodology uses GIS tools to analyse and verify data from both cartographic and descriptive sources. The analysis is based on the retrogressive approach, as most of the cartographically reliable sources come from the early 19th century.

The presented research procedure consists of three stages: preparation and processing of source material, registration of source information, and finally, its harmonization. The research procedure consists of two main steps: 1) identification (initial identification of the object and verification of its existence); 2) geometrisation (determination of geometrical parameters of the object, followed by their verification, and confirmation of the object’s course or location in the spatial database).
Equilibrium, kinetic and thermodynamic studies on methylene blue adsorption by Trichosanthes kirilowii Maxim shell activated carbon
Authors: Wang Yuqi , Li Yanhui , Zheng Heng
Published: January 2020

New kind of adsorbent was produced from Trichosanthes kirilowii Maxim shell. The KOH activation technology for preparation of Trichosanthes kirilowii Maxim shell activated carbon (TKMCK) was optimized. Using methylene blue as the sample adsorbate, the adsorption behavior was systematically investigated in terms of the activation agent and temperature, the adsorption temperature and time, the initial adsorbate pH and concentration, as well as the dosage of adsorbent. Surface physical morphology of the TKMCK prepared was observed by scanning electron microscopy (SEM), while the functional groups were determined with Fourier transform infrared (FTIR) spectra. Kinetic studies indicated that the adsorption process was more consistent with the pseudo-second-order kinetic. Both Langmuir and Freundlich isotherms were employed to fit the adsorption data at equilibrium, with the former giving a maximum adsorption capacity of 793.65 mg/g at 323 K. BET surface area of as-prepared TKMCK was 657.78 m2/g.
Protecting the 4G and 5G Cellular Paging Protocols against Security and Privacy Attacks
Authors: Singla Ankush , Hussain Syed Rafiul , Chowdhury Omar , Bertino Elisa , Li Ninghui
Published: January 2020

This paper focuses on protecting the cellular paging protocol — which balances between the quality-of-service and battery consumption of a device — against security and privacy attacks. Attacks against this protocol can have severe repercussions, for instance, allowing attacker to infer a victim’s location, leak a victim’s IMSI, and inject fabricated emergency alerts. To secure the protocol, we first identify the underlying design weaknesses enabling such attacks and then propose efficient and backward-compatible approaches to address these weaknesses. We also demonstrate the deployment feasibility of our enhanced paging protocol by implementing it on an open-source cellular protocol library and commodity hardware. Our evaluation demonstrates that the enhanced protocol can thwart attacks without incurring substantial overhead.
Black-Box Wallets: Fast Anonymous Two-Way Payments for Constrained Devices
Authors: Hoffmann Max , Klooß Michael , Raiber Markus , Rupp Andy
Published: January 2020

Black-box accumulation (BBA) is a building block which enables a privacy-preserving implementation of point collection and redemption, a functionality required in a variety of user-centric applications including loyalty programs, incentive systems, and mobile payments. By definition, BBA+ schemes (Hartung et al. CCS ‘17) offer strong privacy and security guarantees, such as unlinkability of transactions and correctness of the balance flows of all (even malicious) users. Unfortunately, the instantiation of BBA+ presented at CCS ‘17 is, on modern smartphones, just fast enough for comfortable use. It is too slow for wearables, let alone smart-cards. Moreover, it lacks a crucial property: For the sake of efficiency, the user’s balance is presented in the clear when points are deducted. This may allow to track owners by just observing revealed balances, even though privacy is otherwise guaranteed. The authors intentionally forgo the use of costly range proofs, which would remedy this problem.

We present an instantiation of BBA+ with some extensions following a different technical approach which significantly improves efficiency. To this end, we get rid of pairing groups, rely on different zero-knowledge and fast range proofs, along with a slightly modified version of Baldimtsi-Lysyanskaya blind signatures (CCS ‘13). Our prototype implementation with range proofs (for 16 bit balances) outperforms BBA+ without range proofs by a factor of 2.5. Moreover, we give estimates showing that smart-card implementations are within reach.
Experimental Investigation and FEM Modeling of Glued Timber Connections with Slotted-In Steel Plates
Authors: Shekhorkina Svitlana , Kesariisky Alexander , Makhinko Mykola , Nikiforova Tetiana , Savytskyi Oleksandr
Published: January 2020

The study is focused on the mechanical behavior and finite element method (FEM) modeling of glued timber dowel connections with slotted-in steel plates. Standard tests accompanied by a physical optics investigation method were used in order to obtain information about the mechanical properties and stress-strain behavior of glued timber dowel connections with slotted-in steel plates. As such a methodology provides information on the stress-strain state over the surface of a connection, it was used as a verification criterion for a 3D finite-element model. Small-scale glued timber dowel connections with slotted-in steel plates were tested in parallel-to-grain tension to investigate their load-carrying capacity and the load-slip performance of the connection. A three-dimensional finite-element model of the glued timber dowel connections with slotted-in steel plates was developed using existing FE software and verified using the holographic interferograms obtained during step-by-step loading as well as the test results.
PERENCANAAN DAN PENGENDALIAN PRODUKSI AGREGAT PADA USAHA TEDUNG UD DWI PUTRI DI KLUNGKUNG
Authors: Juliantara I Komang , Mandala Kastawan
Published: January 2020

Production planning and control is very important to minimize the occurrence of excess product inventory so that the demand season is low and vice versa there is a shortage of products during the high demand season. The purpose of this study is to determine and determine the amount of production with minimal costs at UD Dwi Putri Klungkung. This research was conducted on building products using an aggregate production planning system while the data used in this study were sales data for one year, production capacity, overtime costs, storage costs and labor costs. Based on the results of the study indicate that the estimated number of products produced during the next year is as many as 31,531 units, which are based on the exponential smoothing method. This method is used, because the exponential smoothing method gives results that have the smallest standard error with MAD value of 208.812, MSE value of 61843.5 and MAPE value of 7.97%. Aggregate planning strategy with chase strategy produces a total production cost of Rp. 242,995,500.00, where the total cost lower, compared to the total production cost with a strategy level of Rp. 254,337,081.00.

Keywords: Forecasting, Aggregate Planning, Chase Strategy, Strategy Level
PERILAKU MASYRAKAT MENGGUNAKAN JASA GOCAR DI KOTA DENPASAR
Authors: Putra Jaya Kris Cahyadi , Rahanatha Gede Bayu
Published: January 2020

The purpose of this study was to determine the behavior in Denpasar City using GoCar services. This research was conducted in Denpasar City. Methods of data collection using surveys with questionnaires and data analysis techniques in this study using multiple linear regression analysis techniques. The results of this study found that the Perceived Value, Perceived Risk and Perceived Quality had a positive and significant influence on the intention to use GoCar services. Perceived Price and Advertising have a positive and significant effect on the intention to use GoCar services. Consumer attitudes have a positive and significant influence on the intention to use GoCar services. GoJek company in this case GoCar should begin to increase brand awareness of its products and start educating prospective customers that GoCar products are safe to use.

Keywords: consumer attitudes, services, services, perceived value
PERAN BRAND IMAGE DALAM MEMEDIASI PENGARUH SPONSORSHIP TERHADAP NIAT BELI ULANG
Authors: Yogi Arta Wiguna I Putu , Santika I Wayan
Published: January 2020

The purpose of this study was to determine the role of brand image in mediating the effect of sponsorship on repurchase intention. This research was conducted at Old Man’s Café Canggu Bali. The study population was visitors who consumed X drinks more than once with a sample of 100 respondents. The analysis technique used is path analysis technique. The results of the study indicate that Sponsorship has a positive and significant effect on X brand drinks at Old Man’s Bar in Canggu. Sponsorship has a positive and significant effect on the intention to repurchase drink X at Old’s Man Bar in Canggu. Brand image has a positive and significant effect on the intention to repurchase drinks X Old Man’s Bar in Canggu Brand image significantly mediates the relationship between sponsorship variables and repurchase intention.

Keywords: brand image, sponsorship, repurchase intention
PENGARUH KUALITAS SITUS DAN PENGETAHUAN PRODUK TERHADAP SIKAP UNTUK MENDORONG NIAT BELI ONLINE DI TOKOPEDIA.COM
Authors: Juarez Putu Damara , Sri Suprapti Ni Wayan
Published: January 2020

The purpose of this study is to examine the effect of website quality and product knowledge on the intention to online-purchasing through the attitude of online - shopping at Tokopedia.com. The sample were 113 people with purposive sampling method. Data were analyzed with two-stage multiple regression analysis. I was found that the website quality had positive and significant effect on the attitude of online shopping on Tokopedia.com, the product knowledge had positive and significant effect on the attitude of online shopping on Tokopedia.com, and the attitude had positive and significant effect on online purchasing intentions. Suggestions that can be given to Tokopedia.com management are to optimize the appearance of the website so that it is easier to use by consumers and add more information that are needed by consumers.

Keywords: website quality, product knowledge, attitude, Tokopedia.com
PENGARUH BUDAYA ORGANISASI, MOTIVASI KERJA, DAN KEPEMIMPINAN TRANSFORMASIONAL TERHADAP KOMITMEN ORGANISASIONAL
Authors: Utarayana I Gede , Dewi Adnyani I Gusti Ayu
Published: January 2020

Komitmen organisasional adalah suatu keadaan dimana seorang pegawai memihak organisasi tertentu serta tujuan dan keinginan untuk mempertahankan keanggotaan dalam organisasi. Budaya organisasi yang kurang baik, kurangnya motivasi kerja serta gaya kepemimpinan transformasional yang kurang tepat akan mempengaruhi komitmen organisasional. Tujuan penelitian ini adalah mengetahui pengaruh budaya organisasi, motivasi kerja dan kepemimpinan transformasional terhadap komitmen organisasional. Penelitian dilakukan di Sekretariat Daerah Kota Denpasar dengan sampel sebanyak 51 orang pegawai kontrak dengan metode purposive sampling. Pengumpulan data dilakukan dengan penyebaran kuesioner. Berdasarkan hasil analisis, ditemukan bahwa budaya organisasi, motivasi kerja dan kepemimpinan transformasional secara simultan berpengaruh signifikan terhadap komitmen organisasional. Secara parsial budaya organisasi berpengaruh positif terhadap komitmen organisasional, motivasi kerja berpengaruh positif terhadap komitmen organisasional dan kepemimpinan transformasional berpengaruh positif terhadap komitmen organisasional

Kata kunci  : Budaya Organisasi, Motivasi Kerja, Kepemimpinan Transformasional dan Komitmen Organisasional
STRATEGI PEMASARAN TAKSI BANDARA NGURAH RAI DENGAN METODE BGC (BOSTON CONSULTING GROUP)
Authors: Naibaho Jontinus , Sasrawan Mananda I Gusti Putu Bagus , Wikanatha Sagita Putu Agus
Published: January 2020

The purpose of this research is to find out the right marketing strategies and competitiveness by identifying and analyzing the internal and external environment that affect the Ngurah Rai Airport Taxi Cooperative. In this study using marketing strategy analysis, namely BCG/Boston Consulting Group Matrix and SWOT (Strength, Weakness, Opportunity, Threats) analysis. BCG matrix to determine the level of market growth and relative market share. SWOT analysis to analyze strengths, weaknesses, opportunities and threats, then using segmenting, targeting, positioning/STP and 7P (marketing mix) results of the data obtained and then analyzed with IFAS and EFAS. The types of data used in this study are qualitative and quantitative data, primary and secondary data. Determination of samples in this study using purposive sampling method as many as 50 respondents. Data collection techniques by observation, questionnaires, structured interviews, and literature study. The results of the BCG matrix research, based on the calculation of the market growth rate is 1.35% and the result of the calculation of the relative market share is 1.45 x> 1 so that it is in the position of Cash Cow. The marketing strategy that can be carried out by the Ngurah Rai Airport Taxi Cooperative is to maintain the market, create new products, find new businesses. The strategy offered in the Cash Cow quadrant the company must always keep the company in a stable condition. The results of the SWOT analysis study from IFAS assessment were 2.66 and EFAS was 2.28. Then the position of the SWOT diagram is Growth Stability which is the company must determine efforts to strengthen market share, increase sales, pursue large profits by diversifying/expanding the market.
FAKTOR-FAKTOR YANG MEMPENGARUHI KEPUTUSAN WISATAWAN INDIA BERKUNJUNG KE BALI
Authors: Sunu Dwi Aldrianto Yohanes , Sendra I Made , Sudana I Putu
Published: January 2020

Bali has been known for its natural beauty, the friendliness of its residents, and the diversity of its customs. Existing tourist attractions in Bali have a diversity of cultures in each region. The existence of similarities cultural between India and Bali resulted Indian tourist visits Bali increase rapidly from the previous year. The purpose of this research is to find out the factors that influence the decision of Indian tourists to visit Bali. This research was dig by using 150 respondents, the sample in this research used purposive sampling method. Data was collected through a questionnaire distributed to Indian tourists who traveled to Bali, then analyzed by using factor analysis then the data processed by the SPSS version 17.0 program. The result of this research revealed that pull factor formed by service quality factors with eigen value 6.500, relaxation factor with eigen value 2.158, family factor with eigen value 1.789, nature factor with eigen value 1.342 and push factor that formed by social interaction factor with eigen value 1.116. Dominant factor that influencing the decision of Indian tourists to visit Bali is VFR factor (Visiting Friends and relatives) with eigen value of 6,500.
MOTIVASI WISATAWAN BERBAGI PENGALAMAN WISATA MELALUI INSTAGRAM
Authors: Firdausy Hakim Mutiara , Suardana I Wayan , Suwena I Ketut
Published: January 2020

There are many photo posts or videos uploaded by tourists at Padang-Padang beach and make it an interesting phenomenon because travelers have shared their tourism experience to social media. The research aims to find out the motivation of tourists to share that travel experience. Respondents in this study amounted to 190 respondents, sample selection using the Purposive sampling method, data in the research was analyzed using factor analysis assisted by the SPSS statistical version 17.0 for Windows. The results of this study are: 1) the motivation of tourists to share travel experiences through Instagram social media at Padang-Padang beach in general is at good level. 2) based on the analysis of factors obtained the results that there are five motivational factors that motivate tourists to share travel experience through Instagram social media at Padang-Padang beach with the loading value factor of 32,154%. The results of this study can be suggested to the organizer to provide local tour guide who can inform more about Padang-Padang beach to tourists.
ANALISIS PENDAPATAN SUPIR PARIWISATA FREELANCE/ INFORMAL PASCA TRANSPORTASI ONLINE DI WILAYAH SARBAGITA PROVINSI BALI
Authors: Widanta A.A. Bagus Putu , Wita Kesumajaya I Wayan
Published: January 2020

The development process indirectly accelerated the transformation process, Bali as one of the provinces in Indonesia also experienced a change from agrarian to industrial which was indicated by the contribution of the agricultural sector to decreasing the GDRP of Bali. Bali tourism continues to experience growth every year, which is marked by the number of tourist visits that increase every year. Rapid tourism growth requires supporting infrastructure for the needs of tourists while in Bali such as accommodation, restaurants, adequate roads, tourism objects, financial services, supply of goods and transportation services. Transportation services sector is an important requirement for tourists both for tourism and business purposes. Tourists visiting Bali Province can use a choice of public transportation modes such as bemo, Sarbagita bus, taxi and turtle transportation. The choice of transportation chosen is usually adjusted to the needs and destination. Rapidly Growing of tourism attracts many workers in Bali who are not accommodated in the formal sector to benefit the blessings of Tourism, with the limitation of capital to meet the needs of life and family needs as an informal tourism driver / freelance driver. The exsistence of freelance drivers with uncertain daily income due to intense competition, the more severe challenges in the future with the presence of online transport / taxis. Online transportation with all its advantages gets strong reactions and rejection from conventional transportation (bemo,taxi, and informal tourism driver) some of them end with the dispute. This study is not only aimed to analyzing the factors that influence the income of freelance drivers, but also examines how the influence of the presence of online transport / taxis influencing the income of freelance drivers. Primary data is used as the main estimate, with a sample of freelance tourism drivers in the Sarbagita Region of Bali Province. Estimates using a multiple linear regression models with independent variables in the form of dummy variables. The estimation results provide a complete picture of the factors that influence the income of freelance tourism drivers in the Sarbagita region of Bali Province. The results also provide an overview income of freelance drivers after the emergence of online transportation. The results of the study are also expected to be a reference for sharing parties in an effort to reduce the friction that occurs.
Performance Analysis of Point-to-Point LoRa End Device Communication
Authors: Triwidyastuti Yosefine
Published: January 2020

LoRa is an emerging communication technology that can be used in any field. Many types of research have analyzed LoRa network using a gateway and several end devices to many monitoring applications. However, the communication performance between LoRa end devices only has not been evaluated. This research tested a LoRa communication between two end devices in a point-to-point topology. From the experiment results with various payload lengths, the optimum payload is only 48 bytes with the default module configuration. Longer payload resulted in a decreased performance. Thus, this research implemented a waiting protocol that can increase the Packet Reception Ratio of 100-byte payload from 49.87% to 97.52%.