bluuebunny/crossref_metadata_2025 huggingface dataset:
A novel image encryption/decryption scheme based on integrating multiple chaotic maps
Authors: Yousif Bedir , Khalifa Fahmi , Makram Ahmed , Takieldeen Ali
Published: July 2020

In this paper, a novel framework is presented for chaotic image encryption. The proposed method is based on integrating multiple chaotic maps (e.g., logistic, tent, quadratic, cubic, and Bernoulli) to generate more robust chaotic maps in order to increase the security and privacy needed by applying variable keys. The latter are generated by computing the sine square logistic map and are then applied to generate the chaotic maps employed in our framework. For this, we have performed many experiments to achieve the best period for each chaotic map in which it performed the best encryption. Here, we combine multiple chaotic maps to get a new map that works well when X ∈ [0, 1]. For using a chaotic map in the encryption process, it was necessary to find a way to choose the best of those chaotic maps for encryption. This selection was done with the lowest value for the correlation factor because the smaller value of correlation has an impression of good encryption. We have also noted a clear difference in the influence of one of these maps on some pictures from the others. We chose one of those maps according to the correlation value for each encoding process and compared them. Then, we used a chaotic map of the best of these values for encryption and decryption. Numerical results on various gray images showed the robustness of the proposed method to encrypt and decrypt the images based on the evaluation using different performance analyses. We compared our methods against other well-known approaches, e.g., circular mapping, S-boxes, and S-box with Arnold transform. Our pipeline outperforms those methods. Moreover, our results documented that the proposed scheme has an excellent security level with very low correlation coefficients and good information entropy.
Hall effect instruments, evolution, implications, and future prospects
Authors: Goel Naman , Babuta Aniket , Kumar Abhimanyu , Ganguli Souvik
Published: July 2020

Since the revolution in solid state electronics, many innovative principles were investigated for a better and simpler design. Thus, Hall effect-based sensors and instruments gained importance. To employ this principle in several operating conditions and with different setups, several researchers contributed significantly over the decades, which ultimately led to the establishment of industries producing a wide range of Hall devices. The objective of this paper is to review the available configurations and current status of the Hall effect-based technologies. A detailed discussion is carried out on the various types of existing Hall-based devices, such as linear sensors, field-programmable sensors, switches, latches, speed and directional sensors, and vane sensors. The effect of materials and the influence of several undesired effects (such as offset voltage, temperature, noise, and drift) are also investigated. The compensation/reduction techniques are mentioned therein, and interested researchers are encouraged for the development of new techniques. This paper concludes with the discussion on the market scenario (such as electronics sector and automotive industry) and progression in current research on Hall devices while projecting some new research directions in this field.
Lattice sites of implanted Na in GaN and AlN in comparison to other light alkalis and alkaline earths
Authors: Wahl U. , David-Bosne E. , Amorim L. M. , Costa A. R. G. , De Vries B. , Correia J. G. , da Silva M. R. , Pereira L. M. C. , Vantomme A.
Published: July 2020

The lattice location of ion implanted radioactive 24Na (t1/2 = 14.96 h) in GaN and AlN was determined using the emission channeling technique at the ISOLDE/CERN facility. In the room temperature as-implanted state in both GaN and AlN, the majority of the sodium atoms are found on interstitial sites near the octahedral position, with a minority on cation Ga or Al substitutional sites. Following annealing at 800–900 °C, the interstitial fraction is reduced while the substitutional incorporation increases. Our results thus further establish the amphoteric character of Na in GaN and AlN, in analogy to other light alkali Li and alkaline earths Be and Mg. The site changes upon annealing are attributed to the onset of migration of interstitial Na, for which an activation energy of 2.2–3.4 eV is estimated in GaN and 2.0–3.1 eV in AlN, and its subsequent capture by cation vacancies resulting from the implantation. A comparison of the lattice site change behavior of Li, Be, Na, and Mg shows that the onset of interstitial migration correlates with the ionic radii of these elements.
Extended Koopmans’ theorem in the adiabatic connection formalism: Applied to doubly hybrid density functionals
Authors: Gu Yonghao , Xu Xin
Published: July 2020

A rigorous framework that combines the extended Koopmans’ theorem (EKT) with the adiabatic connection (AC) formalism of density functional theory is developed here, namely, EKT-AC, to calculate the vertical ionization potentials (IPs) of molecular systems. When applied to the doubly hybrid density functional approximations (DH-DFAs), the EKT-DH approach is established for the B2PLYP-type DHs with one-parameter and two-parameters, as well as the XYG3-type DHs. Based on EKT-DH, an approximation of the KT type is introduced, leading to the KT-DH approach. The IP-condition that the calculated vertical IPs with EKT-DH or KT-DH are to reproduce the experimental IPs closely is applied to investigate the commonly used DH-DFAs for such a purpose and is utilized as a principle for DH-DFA developments. Considering the systematic improvements, as well as its numeric stability, we recommend the KT-B2GPPLYP approach as a pragmatic way for vertical IP calculations.
Phonon localization in single wall carbon nanotube: Combined effect of 13C isotope and vacancies
Authors: Islam Md. Sherajul , Howlader Ashraful Hossain , Anindya Khalid N. , Zheng Rongkun , Park Jeongwon , Hashimoto Akihiro
Published: July 2020

The combined effect of 13C isotope doping and vacancies on the phonon properties of a single-wall carbon nanotube is theoretically investigated using the forced oscillation method. The phonon density of states (PDOS) is calculated for all (0%–100%) 13C isotope contents and wide (0%–30%) vacancy concentrations. We found a redshift of the Raman active E2g peak in the PDOS with increasing isotope contents, while the disappearance of the E2g peak and the appearance of a new sharp peak in the low-energy region with increasing combined defects. Both 13C isotope and combined defects cause the localization of the high-energy optical phonons. We calculated the typical mode patterns for the in-plane longitudinal optical phonon to visualize the localization phenomena elaborately at the presence of isotope and vacancies. The calculated average localization length shows an asymmetric behavior with increasing 13C isotope concentrations which is in good agreement with the 13C isotope dependence localization length of single-layer graphene. We noticed that a typical localization length is on the order of ∼1 nm at 70% isotope concentrations. The combined effect of 13C isotope and vacancies shows an abruptly decreasing localization length with increasing defect densities. These results are important to understand the heat conduction as well as nanoscopic vibrational studies such as tip-enhanced Raman spectra in carbon nanotubes where the local phonon energies may be mapped.
N
3
+
: Full-dimensional ground state potential energy surface, vibrational energy levels, and dynamics
Authors: Koner Debasish , Schwilk Max , Patra Sarbani , Bieske Evan J. , Meuwly Markus
Published: July 2020

The fundamental vibrational frequencies and higher vibrationally excited states for the N3+ ion in its electronic ground state have been determined from quantum bound state calculations on three-dimensional potential energy surfaces (PESs) computed at the coupled-cluster singles and doubles with perturbative triples [CCSD(T)]-F12b/aug-cc-pVTZ-f12 and multireference configuration interaction singles and doubles with quadruples (MRCISD+Q)/aug-cc-pVTZ levels of theory. The vibrational fundamental frequencies are 1130 cm−1 (ν1, symmetric stretch), 807 cm−1 (ν3, asymmetric stretch), and 406 cm−1 (ν2, bend) on the higher-quality CCSD(T)-F12b surface. Bound state calculations based on even higher level PESs [CCSD(T)-F12b/aug-cc-pVQZ-f12 and MRCISD+Q-F12b/aug-cc-pVTZ-f12] confirm the symmetric stretch fundamental frequency as ∼1130 cm−1. This compares with an estimated frequency from experiment at 1170 cm−1 and previous calculations [Chambaud et al., Chem. Phys. Lett. 231, 9–12 (1994)] at 1190 cm−1. The remaining disagreement with the experimental frequency is attributed to uncertainties associated with the widths and positions of the experimental photoelectron peaks. Analysis of the reference complete active space self-consistent field wave function for the MRCISD+Q calculations provides deeper insight into the shape of the PES and lends support for the reliability of the Hartree–Fock reference wave function for the coupled cluster calculations. According to this, N3+ has a mainly single reference character in all low-energy regions of its electronic ground state (3A″) PES.
Scale-dependent Rayleigh–Taylor dynamics with variable acceleration by group theory approach
Authors: Abarzhi Snezhana I. , Williams Kurt C.
Published: July 2020

Rayleigh–Taylor instability (RTI) has critical importance for a broad range of plasma processes, from supernovae to fusion. In most instances, RTI is driven by variable acceleration, whereas the bulk of existing studies have considered only constant and impulsive acceleration. This work focuses on RTI driven by acceleration with a power-law time-dependence. We review the existing theoretical approaches, apply the group theory approach to solve this long-standing problem, and yield the unified framework for the scale-dependent dynamics of Rayleigh–Taylor (RT) bubbles and RT spikes. For the early-time linear dynamics, we provide the dependence of RTI evolution on the acceleration parameters and the initial conditions. For the late-time nonlinear dynamics, we find a continuous family of asymptotic solutions, directly link the interface velocity to the interface morphology and the interfacial shear, derive solutions for the regular bubbles and for the singular spikes, and study the stability of these solutions. The properties of special nonlinear solutions in the RT family are scrupulously described, including the critical, Taylor, Layzer-drag, and Atwood solutions. It is shown that the fastest Atwood bubble is regular and stable, and the fastest Atwood spike is singular and unstable. The essentially multi-scale and interfacial character of RT dynamics is demonstrated. The former can be understood by viewing the RT coherent structure of bubbles and spikes as a standing wave with the growing amplitude. The latter implies that RT flow has effectively no motion of the fluids away from the interface and has intense motion of the fluids near the interface, with shear-driven vortical structures appearing at the interface. Our theory agrees with available observations and elaborates extensive benchmarks for future research and for better understanding of RT driven phenomena in plasmas.
A structural framework for unidirectional transport by a bacterial ABC exporter
Authors: Fan Chengcheng , Kaiser Jens T. , Rees Douglas C.
Published: July 2020

Significance

A specific ATP-binding cassette (ABC) transporter is generally viewed to function as either an exporter or an importer, but in principle ABC transporters can transport substrates in both directions across the membrane. Structural studies of the prokaryotic ABC exporter
Na
Atm1 demonstrate that progression through the transport cycle is accompanied by changes in transmembrane helix 6 (TM6) that modulate the binding cavity for transported substrate. Significantly, kinking of TM6 in a post-ATP hydrolysis state stabilized by MgADPVO
4
eliminates the substrate-binding cavity. The presence of this cavity during the transition from the inward-facing to outward-facing conformational states, and its absence in the reverse direction, thereby provide an elegant and conceptually simple mechanism for enforcing the export directionality of transport.
Work-family conflict and well-being: moderating role of spirituality
Authors: Selvarajan T. T. Rajan , Singh Barjinder , Stringer Donna , Chapa Olga
Published: July 2020

Although literature on work-family conflict and well-being is quite extensive, previous research has not examined the role of spirituality as a mechanism for coping with work-family conflict. In this research, we propose that spirituality moderates the relationship between work-family
conflict and well-being. The research includes a broad range of well-being variables including job and family satisfaction, subjective and psychological well-being. Based on a survey of a large national sample (N = 1130), we found that spirituality mitigated the negative effects
of work-family conflict on a wide range of well-being measures. We discuss implications for theory and practice of work-family conflict and spirituality in organizations.
The Measurement Of Maturity Level In Chili’s Using Index Pixel
Authors: Delina Nurul Kusuma , Ayub Wahab Iis Hamsir , Khairan Amal
Published: July 2020

A lot of knowledge and techniques of image processing which are now available are widely various. Much research as well as development is conducted in terms of detecting ripe fruits, one of which is chili. It is one of the local commodities that is marketable. The process of being ripe chili is relatively fast. Generally, to measure ripeness is still carried out manually. The disadvantage of this method is that the level of accuracy is inconsistent, causing fruit decay in numbers. On behalf of lowering the risk of fruit decay, the research conducted uses index pixel method. This means itself is the normalization of variety illuminated by taking ratio in each group of smallest points in an image processing. In this study, the image taking of chili using box equipped with black background is confirmed to be useful in reducing time of segmentation process. When it is in the process of detecting image by searching for the average of index pixel, then RGB will be counted using Learning Vector Quantization (LVQ) that is the calculation utilizing weighing value. As a result, the classification of maturity level can be seen in the test with a very high percentage value and influence to detect fruit ripeness, signed by the color of RG pixels (red and green) by 94.9% correctly detected, the color pixel RB (red and blue) is quite influential by 93.9% correctly detected, and the color of the GB pixel (green and blue) which was less influential at 63.6% was correctly detected.
Airwave Propagation Analysis on Amateur Radio Frequency 10 MHz in Island Areas
Authors: Abdullah S D , Turuy S , Arief A
Published: July 2020

High Frequency (HF) radio is a radio wave that works at frequencies of 3 to 30 MHz with wavelengths of 100 to 10 m, some of the mountainous areas and islands are still classified as rural areas. Rural areas are rural areas where the population is not too dense and there are no high-rise buildings.With the presence of air wave propagation for HF NVIS radio communication at a frequency of 10 MHz that can be used accurately, it can support the creation of communication systems that have effective service quality and can know the model that matches the characteristics of the area, making it easier for operators to build a amateur radio communication network.Propagation is the most important part in designing a communication network on radio waves that are traversed by having several bacterial conditions such as analyzing propagation, estimating interference, estimating cell parameters, reflection or obstacle and distance.VOACAP stands for Voice of America Coverage Analysis Program. This program is an ionospheric model that can predict the performance of HF that is expected to use empirical data.The power received for Ternate-Tidore with a distance of 15 km is 2,304 Watt, while the transmit power for Ternate-Moti with a distance of 37 km is 3,310 Watts and the transmit power for Ternate-Makian is 1,708. Sendangan for the simulation on VOACAP is 7,943 Watt for Ternate-Tidore, 5,011 Watt, for Ternate-Moti, install 3,981 Watts for Ternate-Makian, this shows that VOACAP software has a greater signal than the calculation
Entrepreneurship Information System Design with ICONIX Process for a Student Business Unit Marketplace
Authors: Pratama A. , Mukaromah S. , Ithriah S. A. , Safitri E. M.
Published: July 2020

Indonesia consistently encourage youth generation to become entrepreneurs who have high competitiveness. University plays a role in developing the entrepreneurial spirit and activities of each student as a representative of the youth generation. University provides entrepreneurship courses that are expected to foster interest and encourage the entrepreneurial spirit of students in creating business units. Student business units can create products or services needed by the community and can employ others. This study aims to design student entrepreneurship information systems. The student entrepreneurship information system is a web application-based marketplace to accommodate and promote all products and services of each student business unit. The results of research in the form of UML design with the ICONIX Process approach can provide an overview development of student entrepreneurship information systems in determining the specifications of user requirements, system requirements specifications, and system design.
Detection of Text Similarity for Indication Plagiarism Using Winnowing Algorithm Based K-gram and Jaccard Coefficient
Authors: Puspaningrum Eva Y , Nugroho Budi , Setiawan Ariyono , Hariyanti Nuraini
Published: July 2020

One of the digital data is a document. Documents can be easily copied and deleted. Anyone can retype or copy parts of the document. In this paper will detect text similarity. The more similarity of words there is the more indicated the document is plagiarism. Winnowing algorithm performs the calculation of hash values of each k-gram. This method improves the search time with more accuracy in the detection process. All data selected hash values will be fingerprints of a document. Fingerprint will be used as a basis for comparing similarities between text data. The fingerprint value of the winnowing process for each document will be matched by using the Jaccard Coefficient to measure the similarity of the text. In this paper results show that the adjustment of the k-gram and window values can affect the final result of the similarity percentage value. The smaller the k-gram value, the greater the percentage value.
Network Security Applications Using the Port Knocking Method
Authors: Idhom Mohammad , Wahanani HE , Fauzi Akhmad
Published: July 2020

The most important point in network services is security of access in the port. However, the problem that occurs is an open port or access that cannot be accessed with authentication that can facilitate unauthorized users to be accessed by the server. This is the basis for increasing access rights to the server that is built without having to close the port used by the user. Therefore a port knocking method is needed. Port knocking is a security system that can perform a function that is blocking unwanted access. In principle, port knocking successfully closes all ports on the server. If the user needs access to the server, the user does a “knock” to use the service, then if the user has finished accessing the port is closed again. The system built in this study uses three ports, namely port 22 (SSH), port 23 (Telnet), and port 80 (Web). Port Access time is 10 seconds each. Based on the results of the analysis and testing of the system implementation carried out, the results of the system can be run properly and can improve the security of network systems that are built compared to networks that do not use Port Knocking security. In research assessing on public and local networks. According to the results analysis, carrying out a remote server via local time requires faster time from a remote server through the public. In the SSH protocol there is a difference in time of 2.42 seconds, Telnet 2.14 seconds, and Web 2.19 seconds.
Integration at the Application Interface Level between SIAMIK and SIPERPUS (a Case Study in XX)
Authors: Wahyuni E D , Novitasari D , Hadi M S , Hasanah N
Published: July 2020

Many business organizations have information systems, but most still operate separately as a silo. The problem that arises is that there is ineffectiveness in the process that is in the application. So the need for an integrated information system that can access two or more systems in the organization is needed. The system integration process is carried out using Enterprise Application Integration (EAI) method at the application interface level. This method is used to integrate academic information systems (SIAMIK) and library information systems (SIPERPUS). The results of this study are that both applications are connected without changing source codes from both applications. The integrated system design can facilitate the admin in the process of registering new users from the SIPERPUS application.
Performance of Delay Tolerant Network Protocol in Smart City Scenario
Authors: Agussalim  , Tsuru Masato , Nur Cahyo W. , Agung Brastama P.
Published: July 2020

The smart city is being developed in many big cities to support local governments for resources and infrastructure optimization in terms of enhancing services for the citizen. Large investment costs are required to implement a communication network for the smart city infrastructure (i.e. Internet of Things (IoT) devices) using 4G or Wi-Fi networks. This study aims to implement Delay Tolerant Network (DTN) as a low-cost alternative network for the smart city. We use Surabaya smart city plan scenario in which smart mobility services are provided in city transportation and infrastructure. The IoT devices are installed in numerous locations and continuously transmit messages to the monitoring server located in the city hall, bus and car employed as a DTN node. In this paper, as a preliminary research, we investigate the performance of well-known DTN routing protocols (Epidemic, Maxprop, and ProphetV2) with our proposed protocol called Spray and Hop Distance (SNHD). The evaluation is performed using the ONE simulator in terms of the number of delivered messages, the average latency, and the overhead ratio. The results show the performance of SNHD is better than the well-known DTN protocols in various conditions when the total size of delivered messages is large. Unfortunately, none of those routing protocols has a good performance in all of the scenario conditions. In the future, we desire to implement this system in real smart city system in Surabaya and do simulation with more realistic scenario such as real traffic-trace.
Binary Classification using Convolutional Neural Network for Attributes Identification of Pedestrian Image
Authors: Siradjuddin Indah Agustien , Subroto Arif , Muntasa Arief
Published: July 2020

Attribute Identification is proposed in this research to help the security system for identifying the attribute of the pedestrian image. Convolutional Neural Network is used as the binary classifier in the proposed research because it has the ability of feature learning; hence handmade feature is not required in this network. The network architecture consists of the Convolutional, Rectified Linear Unit, Pooling, and Fully Connected Layer. Three models are proposed for the attributes identification based on the number of weight layers, they are, ten, eight, and six. There are seven attributes are identified using seven binary classifiers. They are male, hat, long hair, backpack, carrying nothing, shorts, and sandals. The conducted experiments showed that our proposed model achieved higher accuracy for several attributes compare to the previous model. The highest accuracy achieved in this research is 86.7% for the male attribute, and the lowest is 26.7% for footwear sandals.
Design of Virtual Reality Application for Taharah Using 3D Blender
Authors: Anamisa D R , Yusuf M , Mufarroha F A , Rohmah N
Published: July 2020

Taharah or purification is worship to God through cleaning some parts of the body with ablution and dry ablution or cleansing body from Najis or ritually unclean, such as small or big Hadas. Taharah is compulsory before pray and Tawaf. Moslem should understand the procedures of taharah. Now a days, taharah information is delivered through book, video compact disk (VCD) or websites. Taharah is not only knowledge but should be practice correctly. Therefore, this research aims to develop virtual reality application using 3D animation for learning Taharah, including ablution, dry ablution and cleaning ritually unclean. This application is using an Android operating system, 3D Blender modelling and unity for mobile device design. Furthermore, this application contains the Taharah theory and the rules. Moreover, this research makes a contribution by providing a virtual reality system of taharah based on 3D Blender. The testing result shows this application achieves 69.6% of effectiveness comparing to printing media for taharah learning media. The object testing is Moslem students with age of 11 years above.
Mobile Expert System Using Forward Chaining for Diagnosing Teak Tree Disease
Authors: Imamah  , Agustiono Wahyudi , Rochman Eka Malasari , Firdaus Nuris
Published: July 2020

The teak trees is a high-quality wood that grows in Indonesia. Teak trees are susceptible to pests and diseases within the first to 12 months of life. The limited number of agricultural agents in each sub-district becomes a reason why we proposed a mobile expert system to detect pests and diseases in teak trees. The method used in this study is forward chaining. The results of this study showed that 9 of disease were successfully detected by a human expert. Whereas by using the mobile expert system only 7 diseases were successfully detected. From this comparison, the accuracy of the mobile expert system using forward chaining method is 77%.
Development Of Poor Family Selection System Using Simple Multi Attribute Rating Technique Exploiting Rank Method
Authors: Santosa I , Wijaya D A , Mulaab  , Rachmad A , Novianti T
Published: July 2020

In overcoming the problem of poverty, the Office of Community and Village Empowerment of Sampang Regency implements the GEMASAHABAT (Joint Movement Towards Harmonious and Dignified Movement). This program is a program of providing assistance to poor families, but with a large number of poor families, a ranking process is needed to find out poor families that are right on target. The program can be assisted by the existence of a method designed into a decision support system that can include assessment parameters related to ranking poor families, a method deemed appropriate in assisting the ranking process, namely the Simple Multi-Attribute Branch Technique Exploitng Ranks (SMARTER) method, where the method is part of the Multiple Criteria Decision Making method. This method was chosen because it can rank data with multiple criteria. The results of this study are software that was developed based on 100% functionality test and 91% of speed tests stated that high speed and ease of implementation.
An Improved AES Key Generation in Audio Steganography
Authors: Purnamasari D. N. , Ramadhani A. D.
Published: July 2020

The higher Internet use also affects the level of information security in the digital world. Nowadays, many users send private messages or even secret messages through the Internet. This has an impact on the increasing number of illegal people who try to see and even change the information for personal gain. There is a solution to this problem by inserting a secret message in a file such as images, audio, or video. To increase the level of security, secret messages are encrypted first using cryptographic techniques. In this paper we propose a method for developing key generation in audio steganography techniques using the AES (Advanced Encryption Standard) algorithm. We use additional parameters to create the AES key, i.e. the user’s identity. The user’s identity is entered into the key table which is then randomly selected by the system when the user wants to get the key. There is a combination process and hash function to add complexity to the key. The performance of the proposed method is tested based on computing time and audio signal strength. The test results show that the message inserted in the audio file does not affect the file size, but rather affects the audio signal strength. Audio signals that experience additional data are at frequencies of 15 to 20 kHz and for other frequencies only experience additional noise.
Application Monitoring and Evaluation using SMART (Simple Multi attribute Rating Technique) Method
Authors: Fitriani Nurhayati , Suzanti Ika Oktavia , Jauhari Achmad , Khozaimi Ach.
Published: July 2020

Montoring is a systematic process of collecting data from that data to be evaluated to find out the quality of the system, along with times the monitoring and evaluation process is done using technology that can be web-based or android mobile, so that the process of monitoring & evaluation is easier and more efficient. In addition to getting an accurate assessment, it is necessary to apply a method that can process data into an objective assessment, the SMART method is a simple multi-attribute method that can be used in processing data into an accurate assessment. Trunojoyo Madura University Dormitory has many activities aimed at realizing the education of the dormitory character, the activity data is monitored and evaluated to provide an assessment of the activeness of students living in the dormitory. However, the process of monitoring & evaluation of the dormitory is still carried out manually, so an application for monitoring & evaluating the activities of the hostel which uses the SMART method is needed to facilitate the monitoring process and obtain an objective assessment result.
Robot Orientation Estimation Based on Single-Frame of Fish-eye Image
Authors: Fuad Muhammad , Agustinah Trihastuti , Purwanto Djoko , Sardjono Tri Arief , Dikairono Rudy
Published: July 2020

In order to develop the steering control for collision avoidance behaviour, robot must be able to determine its heading orientation with respect to environment. Orientation can be measured by dedicated sensors or through visual features perception. In vision-based orientation estimation problem, most of approaches are making use of a matching process between pair of frames. This paper proposes a method of estimating robot’s heading orientation by using only a single-frame of fish-eye image. CIE-LAB colour space is applied to handle colour and illumination intensity change. Straight line segments are extracted from thresholded CIE-LAB image take advantage of Progressive Probabilistic Hough Transform. Angle of the corresponding line segment is measured using combination of Law of Cosines and quadrant principle. Heading orientation in yaw angle is estimated by implementing voting mechanism based on region grouping and length of perpendicular line. Some experiments are made in robot soccer field environment to compare orientation estimation system against IMU’s measurement. Discussion about the performance and limitation of the system are included in this paper.
Predictive Maintenance Analysis Overhead Crane Machine in PT Bromo Steel Indonesia
Authors: Hadi Sofian , Gustopo Dayal , Indra Dimas
Published: July 2020

Problems that often occur in the production process at PT. Bromo Steel Indonesia is damage to the engine overhead crane. The damage that occurs to the engine, has a negative impact on the company, where the production process stops. The purpose of this research is to design maintenance schedules, reduce engine overhead crane downtime, improve Standard Operating Procedures. Based on the results of the research, maintenance intervals on overhead crane engine components are brake systems for 95 days, carbon brush for 27 days, electric hoist for 46 days, limit device for 47 days, clutch for 56 days, pull motor for 31 days, drum roll electric for 44 days, wire rope for 29 days. Changes to the maintenance system from breakdown maintenance to predictive maintenance resulted in saving cost of 27,62% on overhead crane machines component with a nominal value of IDR 1.051.031.511 and result of the analysis of the calculation overall equipment effectiveness at PT Bromo Steel Indonesia before predictive maintenance of 90,19% and after predictive maintenance of 92,06% an increase 1,87 %.
The hybrid whale optimization algorithm: A new metaheuristic algorithm for energy-efficient on flow shop with dependent sequence setup
Authors: Utama Dana Marsetiya , Widodo Dian Setiya , Ibrahim Muhammad Faisal , Hidayat Khoirul , Baroto Teguh , Yurifah Aminatul
Published: July 2020

Recently, The industrial sector produces about half of the worlds total energy consumption. Manufacturing companies are required to reduce energy consumption. This article aims to develop a Hybrid Whale Optimization Algorithm (HWOA). We use the objective function of minimizing energy consumption. It solves the problem with permutation flow scheduling problems (PFSSP). Dependent sequence setup is a PFSSP problem with setups that depend on schedule sequence. We offer HWOA with local search strategies. The solution in each HWOA iteration is improved using flip and swap mutations. Furthermore, HWOA is compared with several algorithms. We use numerical experiments to show the performance of the proposed algorithm. Comparative analysis with several algorithms has previously been carried out with ten variations of PFSSP problems. Based on numerical experiments, HWOA proved to be competitive compared to other algorithms.
Risks analysis on digital platforms adoption to elevate SME businesses in developing country
Authors: Andriani Debrina Puspita , Nur Aini Azizah Putri , Anwar Agustinus Alfian , Adnandy Rheza
Published: July 2020

Industry 4.0 is a term for the digital revolution in industrial area appearing from a comprehensive and computerized network. Digital platforms can be an impressive and beneficial media for industry to get closer with the customers. While many big companies have attempted to figure on the potential and risks of digitalization along have introduced an innovation process for their business models, small and medium enterprises (SMEs) have not utilized this optimally. Currently SMEs are known as the bedrock of most economies, especially in developing countries. The aim of this study was to optimize the digital platform that had been developed as SME business media through risk analysis for the sustainability constructing. The SWOT analysis and failure mode and effect analysis (FMEA) approach were used to assess the identified and analysed risks before determining the appropriate mitigation plan. The study expected SMEs to fulfil the challenges and opportunities from Industry 4.0 for elevating national economic stability.
Using System Dynamic Model for Predicting Inventory of Rice Necessity
Authors: Andriansyah A , Rahmi A , Ilyas I
Published: July 2020

Indonesian government has an organization that aims to manage basic necessity nationally, especially for rice commodity. The organization runs in the form of a business entity and has a program making welfare of the poor people by providing rice assistance. There is still over stock and out of stock in inventory while organization distributes this relief. That matter creates unbalance between commodity in inventory and commodity in distribution incurring a large cost. Prediction model using system dynamic in this study was needed to control the inventory and reduce over stock or out of stock. Causal loop diagram was used to describe the relationship between variables in the system and simulation was run with stock and flow diagram. Simulation was done by benchmarking the actual and the simulation results. The model that was built, tested using the Mean Absolute Percentage Error (MAPE). Based on the simulation results, the values of MAPE are below 5%. This indicates that the model can represent the real system and can use to predict variable for the future.
Study on kefir grain concentration and the different length of storage on the physicochemical of goat milk kefir
Authors: Dewi A C , Rahardjo A H D , Setyawardani T , Subagja H
Published: July 2020

This study was about the effect of kefir grain concentration level and the different length of storage, as well as the interaction between kefir grain concentration level and the different length of storage on the fat content, pH and the viscosity of goat milk kefir (GMK). The ingredients used were goat milk from Pegumas farmers group and kefir grains from Perwira kefir. Data was analyzed by using the analysis of variance of 2x4 factorial and continued by Duncan’s new multiple range test. The results showed that kefir grain concentration gave a significant effect (P<0.01) on the fat content, pH and the viscosity of GMK. The different length of storage gave a significant effect (P<0.01) on the fat content, pH and the viscosity of GMK. The interaction had no significant effect (P>0.05) on the fat content and there was an interaction effect (P<0.01) on the pH and viscosity of the GMK. The conclusion of this study was the increase of the concentration level of kefir grain up to 3% resulting on the lowest fat content and pH, and the highest viscosity; and that the length of storage up to 21 days decreases the fat content and pH, but increases the viscosity.
Physicochemical And Sensory Properties Of Pedada Fruit (Sonneratia caseolaris) Bar
Authors: Putra A Y T , Susiloningsih E K B , Susanti M A
Published: July 2020

Food acceptability relates to the interaction food has with the consumer at a given moment in time. Physicochemical and sensory properties of food influence the way consumer select their food. Therefore, the main objectives of this study were to evaluate texture, calories value and sensory properties food bar made with lesser yam, mung bean base with pedada fruit. Eight food bars were produced: G1H1, G1H2, G1H3, G2H1, G2H2, G2H3, G3H1, G3H2, G3H3. Duncan multiple range test were performed with 5% significance for statistical analysis. The highest calorie value and fracture ability are sample G3H3, and G3H1, respectively, but it does not significant (p>0,05). The different composition of mung bean, lesser yam, and pedada fruit do not affect sensory properties. Therefore, in this study, sample evaluate is have similar physicochemical, and sensories properties.
The Causality of Monosodium Glutamate Fourier Transform Infrared (FTIR) Absorbance Pattern with Wave Peaks from Several Seasoning Product (Savoury Flavors)
Authors: Mujianto  , Wignyanto  , Kumalaningsih S , Aulianni’am  , Agriculture
Published: July 2020

This study is aimed to find out the causality of raw materials, food additives and supportive materials used to produce several products of seasoning products available at commercial market and their direct correlation with monosodium glutamate (MSG) as flavor enhancing ingredient. An observation is taken to randomly collect 9 (nine) brands of seasoning (savory flavors) using Fourier Transform Infrared (FTIR) spectroscopy. The results of observation are processed using main component analysis and hierarchical cluster analysis. The results of study show that9 (nine) brands of seasoning (savory flavors) are made from food additives and supportive material which score of eigenvalues is equal to 8.854 or 98.374 of variant and there is a direct causality with synthetic flavor enhancing ingredient (2 MSG variants). Such direct causative direct correlation applies to seasoning with grilled chicken flavor (SF7), seasoning with salted cheese flavor (SF5), seasoning with roasted beef flavor (SF3), seasoning with barbeque flavor (SF9), seasoning with tiramisu flavor (SF6), seasoning with spicy corn flavor (SF10) and monosodium glutamate (MSG) with eigenvalues score is 7.416 or 67.416% of variant. Balado flavored seasoning (SF8), cheese flavored seasoning (SF4), sweet spicy flavored seasoning (SF11) and Chinese flavor enhancing ingredient have direct causality with Chinese flavor enhancing ingredient, which eigenvalues score, is 1.517 or 13.792% of variant. Monosodium glutamate (SF1) and Chinese flavor enhancing ingredient have similarity of eigenvalues score is 1.108 or 10.071% of variant.
Photovoltaic driven adsorption-cooling cycle
Authors: Bagus Wirajati I Gusti Agung , Ardita I Nengah , Suta Waisnawa I Gede Nyoman
Published: July 2020

In this paper, an adsorption cooling system with drive heat sources from solar power through a photovoltaic system will be introduced. The PV system is used to heat the water collected in the storage tank for further use as the main driving force in the adsorption cooling system. The PV system has been tested and produced a voltage of 21 V with a current of 5.7 A. Whereas the research for the adsorption cooling system, it is only at the simulation test stage to determine the minimum heat source temperature that can be used in operation, which is 60 °C. By this research, it can be ascertained that the PV system is very possible to be applied to the adsorption cooling system so that the combination of the application of a technology system that is very environmentally friendly can be realized.
The Effect of Nanofluid Volume Fraction to The Rate of Heat Transfer Convection Nanofluid Water-Al2O3 on Shell and Tube Heat Exchanger
Authors: Arsana I M , Agista D R , Ansori A , Sutjahjo D H , Effendy M
Published: July 2020

Shell and tube heat exchanger is now widely used in the field of industry and technology. In many applications, the working fluid is still a conventional fluid that still has a low thermal conductivity properties. Nanofluid is one of the ways that can be used to increase the thermal conductivity. The purpose of this research is to identify the influence of volume fraction against the heat transfer rate and effectiveness on shell and tube heat exchanger. The material used is Al2O3 with difference fraction volume of 0.5%, 1%, and 1.5% on the cold fluid. The temperature of the fluid used in the heat of 90 ° C . The result of this study shows the highest effectiveness in mixed fraction nanofluid volume of 1.5%, which is 42% with the rate of heat transfer of 7061.93 Watts. Then the lowest effectiveness obtained on the State mixture volume fraction without nanofluid, which is 17.7% with the rate of heat transfer of 5666.71 Watts. Thus it can be concluded that when the fraction of nanofluid is getting higher, then the volume will increase the rate of heat transfer convection as well as the effectiveness of the shell and tube heat exchanger.
Analysis Of Resistance Of Materials That Have Las Connection In St 37 Steels
Authors: Sariman Farid , Wullur Christian Wely , Cipto  , Parenden Daniel
Published: July 2020

This study aims to determine the effect of welding currents on the strength and toughness of SMAW welds with Impact testing. This study uses ST 37 Steel (Medium Carbon Steel), this steel including medium carbon steel. The material is treated with welding with a variation of current 90 Ampere, 110 Ampere, and 130 Ampere using SMAW DC welding, Impact testing is a test to measure the resistance of the material to shock loads. Impact testing simulates material operating conditions that are often encountered where the load does not always occur slowly but comes suddenly. The aim to be achieved in this study is to analyze impact testing for medium Carbon Steel welding position using a flat or down hand welding position, the type of seam used is V with a 90 ° angle. Specimens are tested for impact. Impact test results in the base metal and current variation specimens showed that the highest impact strength values were found in base metal, which was 146 joules and 1,825 joules / mm2, compared with the current variation group of 110 amperes, 130 amperes. The types of fracture that occurred were on the base metal and the 90 Ampere current specimen group was brittle fracture, and the 110 Ampere specimen group and the 130 Ampere specimen group were tenacious fractures.
Analysis of Skid and Rolling Vehicle
Authors: Cipto  , Parenden Daniel , Hariyanto  , Bako Rahap M
Published: July 2020

Daihatsu Taft Hiline is one of the cars that are widely used for out-of-town travel, to improve the performance of the car in the field, modified cars, modifications made namely the elevation of the car body. The elevation of the car results in a shift in the center of gravity, so that the stability of the car changes. Changing the stability of the car results in skid conditions and the condition of the car rolling. Data processing calculations using the Vehicle Dynamics Turn method, where previously performed calculations to get the car data, car height, car weight, and the location of the center of gravity. Then do skid analysis and rolling to find out the vehicle dynamics that occur in the vehicle. The calculation result of the maximum speed allowed so as not to skid is 66.16 Km / h and the maximum speed allowed so as not to roll is 32.21 Km / h.
Effect of Metal Inert Gas Welding Process Parameters to Tensile Strength on ST 37 Steel Sheet Joint
Authors: Muzakki Hakam , Prasetyo Teguh , Syafi’ul Umam M , Lumintu Ida , Hartanto Dwi
Published: July 2020

Welding technology still used in manufacturing industries, however welding process affected to decrease a joint performance. This study discussed about the welding parameters of Metal Inert Gas (MIG) which affected to tensile strength of weld joint. Welding process parameters used in this study such as welding current, welding time, and welding speed. The level of welding current was 80 A, 90 A, and 100A. Wire Speed was leveled with 55 inch/min, 60 inch/min, and 65 inch/min. The levels were 5 mm/sec, 6 mm/sec, and 7 mm/sec as welding speed. Tensile testing was used to measure strength of weld joint joined by each welding parameters combination. Welding current 100 A, wire speed 60 inch/min, welding speed 5 mm/sec could join ST 37 steel sheet up to 51.41 kg/mm2 of tensile strength. Welding current affected to increase tensile strength when values of welding current were increased between 80 A and 100 A….
Friction and Wear Analysis of UHMWPE Material Using Pin-on-Disc Tester with Lubricant and Non-Lubricant
Authors: Wahyudi M , Ismail R , Jamari J
Published: July 2020

Ultra-high molecular weight polyethylene (UHMWPE) is a biomaterial that is widely used in the manufacture of acetabular liners for the application of artificial hip joints (AHJ). The problem that often arises from UHMWPE material is the occurrence of wear debris as a result of the mechanism of contact of UHMWPE material with its partner material on AHJ. The purpose of this research is to analyze the friction and wear behavior of UHMWPE material which is paired with AISI 316L. Wear test using a pin-on-disc tribometer in dry conditions and serum bovine lubricant. SEM-EDX analysis is used to see the phenomenon of wear track and absorption of AISI 316L metal elements that occur in UHMWPE. The results showed that the use of bovine serum significantly decreased the friction and wear rates of the UHMWPE / AISI 316 pair.