bluuebunny/crossref_metadata_2025 huggingface dataset:
Portfolio-Based Assessment in English Language Learning: Highlighting the Students’ Perceptions
Authors: Syamsul Ma'arif Ahmad , Abdullah Fuad , Siti Fatimah Asri , Nurul Hidayati Arini
Published: February 2021

Portfolio-based Assessment (hereafter, PBA) plays an indispensable role in language assessment. PBA represents the development of the students’ learning process outcomes, trains autonomous learning, and stimulates metacognitive awareness. Conversely, a few investigative attempts, addressed the students’ perceptions of PBA in the Indonesian EFL Context. Therefore, this study aimed to decipher the perceptions of EFL students in Indonesia on PBA use in the English subject. Empirically speaking, two female students were involved as the participants in this study. The data were collected through a semi-structured interview and analyzed with Thematic Analysis (TA) (Braun & Clarke, 2006). The findings revealed that students articulated their perceptions in three major themes, namely developing self-monitoring from the students’ learning processes, generating discipline, responsible and autonomous language learning attitudes, and mitigating perceptual mismatches among teachers and students. Pedagogically speaking, this study indicates that PBA employment can provide opportunities for students to monitor their learning progress, and enhance their self-confidence and learning motivation.
An algorithm for the T-countAn algorithm for the T-count
Authors: Gosset David , Kliuchnikov Vadym , Mosca Michele , Russo Vincent
Published: February 2021

We consider quantum circuits composed of Clifford and $T$ gates. In this context the $T$ gate has a special status since it confers universal computation when added to the (classically simulable) Clifford gates. However it can be very expensive to implement fault-tolerantly. We therefore view this gate as a resource which should be used only when necessary. Given an $n$-qubit unitary $U$ we are interested in computing a circuit that implements it using the minimum possible number of $T$ gates (called the $T$-count of $U$). A related task is to decide if the $T$-count of $U$ is less than or equal to $m$; we consider this problem as a function of $N=2^n$ and $m$. We provide a classical algorithm which solves it using time and space both upper bounded as $\mathcal{O}(N^m \text{poly}(m,N))$. We implemented our algorithm and used it to show that any Clifford+T circuit for the Toffoli or the Fredkin gate requires at least 7 $T$ gates. This implies that the known 7 $T$ gate circuits for these gates are $T$-optimal. We also provide a simple expression for the $T$-count of single-qubit unitaries.
Separability for weakly irreducible matrices
Authors: Cariello Daniel
Published: February 2021

This paper is devoted to the study of the separability problem in the field of Quantum information theory. We focus on the bipartite finite dimensional case and on two types of matrices: SPC and PPT matrices (see definitions 32 and 33). We prove that many results hold for both types. If these matrices have specific Hermitian Schmidt decompositions then they are separable in a very strong sense (see theorem 38 and corollary 39). We prove that both types have what we call \textbf{split decompositions} (see theorems 41 and 42). We also define the notion of weakly irreducible matrix (see definition 43), based on the concept of irreducible state defined recently in \cite{chen1}, \cite{chen} and \cite{chen2}.}{These split decomposition theorems imply that every SPC $($PPT$)$ matrix can be decomposed into a sum of $s+1$ SPC $($PPT$)$ matrices of which the first $s$ are weakly irreducible, by theorem 48, and the last one has a further split decomposition of lower tensor rank, by corollary 49. Thus the SPC $($PPT$)$ matrix is decomposed in a finite number of steps into a sum of weakly irreducible matrices. Different components of this sum have support on orthogonal local Hilbert spaces, therefore the matrix is separable if and only if each component is separable. This reduces the separability problem for SPC $($PPT$)$ matrices to the case of weakly irreducible SPC $($PPT$)$ matrices. We also provide a complete description of weakly irreducible matrices of both types (see theorem 46).}{Using the fact that every positive semidefinite Hermitian matrix with tensor rank 2 is separable (see theorem 58), we found sharp inequalites providing separability for both types (see theorems 61 and 62).
Fault-Tolerant quantum computation with constant overhead
Authors: Gottesman Daniel
Published: February 2021

What is the minimum number of extra qubits needed to perform a large fault-tolerant quantum circuit? Working in a common model of fault-tolerance, I show that in the asymptotic limit of large circuits, the ratio of physical qubits to logical qubits can be a constant. The construction makes use of quantum low-density parity check codes, and the asymptotic overhead of the protocol is equal to that of the family of quantum error-correcting codes underlying the fault-tolerant protocol.
Improving quantum algorithms for quantum chemistry
Authors: Hastings Matthew B. , Wecker Dave , Bauer Bela , Troyer Matthias
Published: February 2021

We present several improvements to the standard Trotter-Suzuki based algorithms used in the simulation of quantum chemistry on a quantum computer. First, we modify how Jordan-Wigner transformations are implemented to reduce their cost from linear or logarithmic in the number of orbitals to a constant. Our modification does not require additional ancilla qubits. Then, we demonstrate how many operations can be parallelized, leading to a further linear decrease in the parallel depth of the circuit, at the cost of a small constant factor increase in number of qubits required. Thirdly, we modify the term order in the Trotter-Suzuki decomposition, significantly reducing the error at given Trotter-Suzuki timestep. A final improvement modifies the Hamiltonian to reduce errors introduced by the non-zero Trotter-Suzuki timestep. All of these techniques are validated using numerical simulation and detailed gate counts are given for realistic molecules.
The non-uniform stationary measure for discrete-time quantum walks in one dimension
Authors: Konno Norio , Takei Masato
Published: February 2021

We consider stationary measures of the one-dimensional discrete-time quantum walks (QWs) with two chiralities, which is defined by a 2 $\times$ 2 unitary matrix $U$. In our previous paper \cite{Konno2014}, we proved that any uniform measure becomes the stationary measure of the QW by solving the corresponding eigenvalue problem. This paper reports that non-uniform measures are also stationary measures of the QW except when $U$ is diagonal. For diagonal matrices, we show that any stationary measure is uniform. Moreover, we prove that any uniform measure becomes a stationary measure for more general QWs not by solving the eigenvalue problem but by a simple argument.
Entanglement and swap of quantum states in two qubits
Authors: Ikuto Takaya , Ishizaka Satoshi
Published: February 2021

Suppose that two distant parties Alice and Bob share an entangled state $\rho_{AB}$, and they want to exchange the subsystems of $\rho_{AB}$ by local operations and classical communication (LOCC). In general, this LOCC task (i.e. the LOCC transformation of $\rho_{AB} \to V\rho_{AB} V$ with $V$ being a swap operator) is impossible deterministically, but becomes possible probabilistically. In this paper, we study how the optimal probability is related to the amount of entanglement in the framework of positive partial transposed (PPT) operations, and numerically show a remarkable class of states whose probability is the smallest among every state in two quantum bits.
Characterization and properties of weakly optimal entanglement witnesses
Authors: Wang Bang-Hai , Xu Hai-Ru , Campbell Steve , Severini Simone
Published: February 2021

We present an analysis of the properties and characteristics of weakly optimal entanglement witnesses, that is witnesses whose expectation value vanishes on at least one product vector. Any weakly optimal entanglement witness can be written as the form of $W^{wopt}=\sigma-c_{\sigma}^{max} I$, where $c_{\sigma}^{max}$ is a non-negative number and $I$ is the identity matrix. We show the relation between the weakly optimal witness $W^{wopt}$ and the eigenvalues of the separable states $\sigma$. Further we give an application of weakly optimal witnesses for constructing entanglement witnesses in a larger Hilbert space by extending the result of [P. Badzi\c{a}g {\it et al}, Phys. Rev. A {\bf 88}, 010301(R) (2013)], and we examine their geometric properties.
Entanglement in a linear coherent feedback chain of nondegenerate optical parametric amplifiers
Authors: Shi Zhan , Nurdin Hendra I.
Published: February 2021

This paper is concerned with linear quantum networks of $N$ nondegenerate optical parametric amplifiers (NOPAs), with $N$ up to 6, which are interconnected in a coherent feedback chain. Each network connects two communicating parties (Alice and Bob) over two transmission channels. In previous work we have shown that a dual-NOPA coherent feedback network generates better Einstein-Podolsky-Rosen (EPR) entanglement (i.e., more two-mode squeezing) between its two outgoing Gaussian fields than a single NOPA, when the same total pump power is consumed and the systems undergo the same transmission losses over the same distance. This paper aims to analyze stability, EPR entanglement between two outgoing fields of interest, and bipartite entanglement of two-mode Gaussian states of cavity modes of the $N$-NOPA networks under the effect of transmission and amplification losses, as well as the effect of time delays on the outgoing fields. It is numerically shown that, in the absence of losses and delays, the network with more NOPAs in the chain requires less total pump power to generate the same degree of EPR entanglement. Moreover, we report on the internal entanglement synchronization that occurs in the steady state between certain pairs of Gaussian oscillator modes inside the NOPA cavities of the networks.
Perturbative gadgets without strong interactions
Authors: Cao Yudong , Nagaj Daniel
Published: February 2021

Perturbative gadgets are used to construct a quantum Hamiltonian whose low-energy subspace approximates a given quantum $k$-local Hamiltonian up to an absolute error $\epsilon$. Typically, gadget constructions involve terms with large interaction strengths of order $\text{poly}(\epsilon^{-1})$. Here we present a 2-body gadget construction and prove that it approximates a Hamiltonian of interaction strength $\gamma = O(1)$ up to absolute error $\epsilon\ll\gamma$ using interactions of strength $O(\epsilon)$ instead of the usual inverse polynomial in $\epsilon$. A key component in our proof is a new condition for the convergence of the perturbation series, allowing our gadget construction to be applied in parallel on multiple many-body terms. We also discuss how to apply this gadget construction for approximating 3- and $k$-local Hamiltonians. The price we pay for using much weaker interactions is a large overhead in the number of ancillary qubits, and the number of interaction terms per particle, both of which scale as $O(\text{poly}(\epsilon^{-1}))$. Our strong-from-weak gadgets have their primary application in complexity theory (QMA hardness of restricted Hamiltonians, a generalized area law counterexample, gap amplification), but could also motivate practical implementations with several weak interactions simulating a much stronger quantum many-body interaction.
Ground state blind quantum computation on AKLT state
Authors: Morimae Tomoyuki , Dunjko Vedran , Kashefi Elham
Published: February 2021

The blind quantum computing protocols (BQC) enable a classical client with limited quantum technology to delegate a computation to the quantum server(s) in such a way that the privacy of the computation is preserved. Here we present a new scheme for BQC that uses the concept of the measurement based quantum computing with the novel resource state of Affleck-Kennedy-Lieb-Tasaki (AKLT) chains leading to more robust computation. AKLT states are physically motivated resource as they are gapped ground states of a physically natural Hamiltonian in condensed matter physics. Our BQC protocol can enjoy the advantages of AKLT resource states (in a multiserver setup), such as the cooling preparation of the resource state, the energy-gap protection of the quantum computation. It also provides a simple and efficient preparation of the resource state in linear optics with biphotons.
Is absolute separability determined by the partial transpose?
Authors: Arunachalam Srinivasan , Johnston Nathaniel , Russo Vincent
Published: February 2021

The absolute separability problem asks for a characterization of the quantum states $\rho \in M_m\otimes M_n$ with the property that $U\rho U^\dagger$ is separable for all unitary matrices $U$. We investigate whether or not it is the case that $\rho$ is absolutely separable if and only if $U\rho U^\dagger$ has positive partial transpose for all unitary matrices $U$. In particular, we develop an easy-to-use method for showing that an entanglement witness or positive map is unable to detect entanglement in any such state, and we apply our method to many well-known separability criteria, including the range criterion, the realignment criterion, the Choi map and its generalizations, and the Breuer--Hall map. We also show that these two properties coincide for the family of isotropic states, and several eigenvalue results for entanglement witnesses are proved along the way that are of independent interest.
A note on the quantum collision and set equality problems
Authors: Zhandry Mark
Published: February 2021

A collision for a function $f$ is two distinct inputs $x_1\neq x_2$ such that $f$ outputs the same value on both inputs: $f(x_1)=f(x_2)$. The quantum query complexity of finding collisions has been shown~\cite{BHT1997,AS2004, Ambainis05, Kutin05} in some settings to be $\Theta(N^{1/3})$; however, these results do not apply to random functions. The issues are two-fold. First, the $\Omega(N^{1/3})$ lower bound only applies when the domain is no larger than the co-domain, which precludes many of the cryptographically interesting applications. Second, most of the results in the literature only apply to $r$-to-1 functions, which are quite different from random functions. Understanding the collision problem for random functions is of great importance to cryptography, and we seek to fill the gaps of knowledge for this problem. To that end, we prove that, as expected, a quantum query complexity of $\Theta(N^{1/3})$ holds for all interesting domain and co-domain sizes. Our proofs are simple, and combine existing techniques with several novel tricks to obtain the desired results. Using our techniques, we also give an optimal $\Omega(M^{1/3})$ lower bound for the set equality problem. This lower bound can be used to improve the relationship between classical randomized query complexity and quantum query complexity for so-called permutation-symmetric functions.
Improving the quality of noisy spatial quantum channels
Authors: Tang Ning , Fan Zi-Long , Zeng Hao-Sheng
Published: February 2021

We show, for the non-Markovian or time-dependent Markovian model of noise, by breaking the noisy spatial quantum channel (SQC) into a series of periodically arranged sub-components, that the quality of information transmission described by the purity, fidelity and concurrence of the output states can be improved. The physical mechanism and possible implementation of the idea have been discussed.
Quantum state transfer in disordered spin chains: How much engineering is reasonable?
Authors: Zwick Analia , Alvarez Gonzalo A. , Stolze Joachim , Osenda Omar
Published: February 2021

The transmission of quantum states through spin chains is an important element in the implementation of quantum information technologies. Speed and fidelity of transfer are the main objectives which have to be achieved by the devices even in the presence of imperfections which are unavoidable in any manufacturing process. To reach these goals, several kinds of spin chains have been suggested, which differ in the degree of fine-tuning, or engineering, of the system parameters. In this work we present a systematic study of two important classes of such chains. In one class only the spin couplings at the ends of the chain have to be adjusted to a value different from the bulk coupling constant, while in the other class every coupling has to have a specific value. We demonstrate that configurations from the two different classes may perform similarly when subjected to the same kind of disorder in spite of the large difference in the engineering effort necessary to prepare the system. We identify the system features responsible for these similarities and we perform a detailed study of the transfer fidelity as a function of chain length and disorder strength, yielding empirical scaling laws for the fidelity which are similar for all kinds of chain and all disorder models. These results are helpful in identifying the optimal spin chain for a given quantum information transfer task. In particular, they help in judging whether it is worthwhile to engineer all couplings in the chain as compared to adjusting only the boundary couplings.
Momentum switches
Authors: Childs Andrew M. , Gosset David , Nagaj Daniel , Raha Mouktik , Webb Zak
Published: February 2021

Certain continuous-time quantum walks can be viewed as scattering processes. These processes can perform quantum computations, but it is challenging to design graphs with desired scattering behavior. In this paper, we study and construct momentum switches, graphs that route particles depending on their momenta. We also give an example where there is no exact momentum switch, although we construct an arbitrarily good approximation.
Tensor networks and graphical calculus for open quantum systems
Authors: Wood Christopher J. , Biamonte Jacob D. , Cory David G.
Published: February 2021

We describe a graphical calculus for completely positive maps and in doing so review the theory of open quantum systems and other fundamental primitives of quantum information theory using the language of tensor networks. In particular we demonstrate the construction of tensor networks to pictographically represent the Liouville-superoperator, Choi-matrix, process-matrix, Kraus, and system-environment representations for the evolution of quantum states, review how these representations interrelate, and illustrate how graphical manipulations of the tensor networks may be used to concisely transform between them. To further demonstrate the utility of the presented graphical calculus we include several examples where we provide arguably simpler graphical proofs of several useful quantities in quantum information theory including the composition and contraction of multipartite channels, a condition for whether an arbitrary bipartite state may be used for ancilla assisted process tomography, and the derivation of expressions for the average gate fidelity and entanglement fidelity of a channel in terms of each of the different representations of the channel.
Improving Business Performance through Innovation Strategy and Total Quality Management practice: Survey on the Pharmaceutical Industry In Indonesia
Authors: Syoemantri Yuli Fitriyani
Published: February 2021

The main purpose of this research is to analyze the relationship between innovation strategy and Total Quality Management in improving business performance. The object study of this research is pharmaceutical Industries in Indonesia. This research reveals the proper innovation strategy execution and effective implementation of Total Quality Management in business performance improvement. In this context, data collected from 168 managers at 42 firms operating in pharmaceutical industry in Indonesia were analyzed. The partial least squares structural equation modeling (PLS-SEM) method is used to test the hypotheses both of reflective and formative construct with second order/higher order construct in our model of study. The findings support the hypothesis that there is a positive and significant effect of innovation strategy and Total Quality Management on improving business performance of the company. The result of this research will have strategic implications for the company and expect to be used as feedback related to the execution of their innovation strategies and TQM implementation promptly to improve their business performance.
Friction Stir Welding/Processing of High Entropy Alloys (HEAs)
Authors: MISHRA AKSHANSH
Published: February 2021

Design and development of high entropy alloys is very important to overcome the shortcomings of conventionally used alloys in applications where operating conditions of temperature and loading are extreme. In this recent paper, the application of Friction Stir Welding for joining the high entropy alloys and also using Friction Stir Processing for improving the mechanical and microstructure properties of high entropy alloys are discussed.
FACTORS INFLUENCING CONSUMER PURCHASE INTENTION WHILE BUYING ONLINE
Authors: Baeshen Yasser Ali
Published: February 2021

Motivation/Background: Today, it is very imperative to study the factors that effect and predict the purchase intention of consumer online shopping. E-tailers and e-commerce is expanding very quickly, especially clothing and fashion brands have shifted to electronic channels to reach out their clients. This is one of the reasons that apparel is amongst the most sold items online. The purpose of this research is to identify the factors that influence consumer choices and which factors have significant effect on consumer purchase intention while online shopping fashion apparel.

Method: This research has adopted quantitative approach and explanatory research purpose to establish relationship between four independent variables: Convenience, Price, Information and Security on the dependent variable (Consumer purchase intention). Survey response from 300 consumers was collected through online questionnaire and distributed through convenience sampling.

Results: Data collected was analyzed on SPSS. For two hypotheses, correlation test one-sample t-test was conducted. Further, two hypothesis were analyzed by regression analysis. All four hypotheses were accepted. Results conclude that there is a significant relationship between online purchase intention of consumer and its factors such as price, convenience, security and information about product or service.

Conclusions: This study has many implications for small retailers to focus on factors that can make it easier selling online. Security measures to protect user data are very vital to bring user back on the e-tailing website or webpage.
LIVELIHOOD REALISM: A REVIEW ON CLOSED TEA GARDENS OF DOOARS, WEST BENGAL
Authors: Das Uday , Islam Rafiqul
Published: February 2021

The paper is an attempt to understanding the ongoing livelihood realities in closed/ abandoned tea garden of Bengal-Dooars (Jalpaiguri and Alipurduar). The region produced large scale good qualities tea in more than 150 organised tea estates. Tea industry of North Bengal has been trashily affected by global economic quandary and local constraints. Many tea estates failed to manage the shock; the management closed many gardens. The garden closure and work shutdown have been produced a livelihood disaster. A school drop-out, child trafficking, Child labour mobility, rally of hunger and starvation death and extreme poverty is the ongoing livelihood phenomena in labour colonies of closed tea gardens. The present paper has discussed the particulars (housing, drinking water, medical facilities, education, liabilities etc.) of five closed gardens by using the data from TG Survey Final Report, Labour Commissionerate, Govt. of West Bengal and Tea Board of India.
CAREER COUNSELLING AS AN IMPORTANT COMPONENT THAT MAY BE OFFERED AS A SPECILIZATION FOR THE POSTGRADUATE STUDENTS PURSUING PROFESSIONAL COURSES IN SHILLONG, EAST KHASI HILLS DISTRICT, MEGHALAYA, INDIA TO ENHANCE TEACHER EDUCATION
Authors: Lyngdoh S Maxwell
Published: February 2021

Objective: To find out the need to offer career counselling as a specialization among the postgraduate students pursuing professional courses. Methodology: A descriptive, cross sectional study design, collecting relevant quantitative and qualitative data from the respondents was conducted. Data on retrospective histories and experiences in career counselling was captured to link how career counselling is becoming an important aspect for career development and career decision making. In this study, a total of 100 students were studied. Setting: Postgraduate students from MSc Counselling Psychology and Master of Social Work from Martin Luther Christian University, Shillong. Results: Career counselling has led a student to be familiar with his/her interest and aptitudes, hence paving a way for them to make the right career choice. Career guidance has facilitated students to be focus with their career planning and in choosing relevant programmes during their course of study to help built their expertise. Career Counselling as an area should be enhanced, to create more professionals in the field. Conclusion: There was a strong recommendation that proper career guidance and monitoring is the need of the hour, as students are either over exposed to career information or are not exposed to them at all. (198 words).
DEVELOPMENT OF SPECIALTY COATED FABRICS FOR CANOPY OF INFLATABLE MILITARY TENT (IMT) FOR FOREST AREA
Authors: Das Biswa Ranjan , Bharathi Dasaradhan , Yadav Deepak Kumar , Singh Manoj Kumar , Goswami Thako Hari , Prasad Namburi Eswara
Published: February 2021

The principal objectives of this present work were to develop novel coated fabrics in olive green (OG) colour to serve as canopy for inflatable military tent (IMT) for forest area. Two varieties of coated fabrics were developed by coating of specific grade aliphatic thermoplastic polyurethane (TPU) on Nylon fabrics and one more with coating of plasticized polyvinyl chloride (PVC) on Polyester fabric. The construction parameters and properties of the substrate basic fabrics used for coating were evaluated and reported. The various functional parameters such as breaking strength and elongation%, tear strength, bursting strength, waterproofness, flame retardancy, flexing, accelerated ageing (-400C and 700C), blocking, ultraviolet (UV) radiation protection and colour fastness to washing and light of the coated fabrics were measured and reported with details, along with an elaborate note on the preparatory process pursued for the development of these coated fabrics. The most suitable coated fabric for canopy of IMT was selected based on the evaluated functional features. Further, the thermal analysis was carried out for the selected coated fabric using Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) for assessing its heat resistance. The shelf-life of the selected coated fabric was assessed by evaluating the residual strength (tensile and bursting), measured by subjecting it to accelerated and natural weathering tests. A special device was fabricated to carry out natural weathering test. Statistical analysis was performed at 95% significance level to estimate the actual strength (tensile and bursting) loss upon weathering.
Perception on Acceptability of Nigerian Females on Beaded Jewellery	Empowerment for Entrepreneurial Development
Authors: Adebisi Taibat Tunrayo , Bashorun Oluwafeyikemi Edith , Abdulkadir Shakirat Odunayo , Adepoju Banke Adebola
Published: February 2021

The study investigates the perception of acceptability of Nigerian females on beaded jewellery empowerment for entrepreneurial development. Four research questions with two null hypotheses were formulated and tested. Descriptive research of a survey type was adopted. 70 female students from fine and applied arts and 70 female adults from Ilorin metropolis, Nigeria were used. Proportional sampling technique was used to select the 140 participants. A self-structured questionnaire with six sections was used to seek information from them. Data collected were analyzed using frequency and percentage while the hypotheses were tested using chi-square at 0.05 level of significance. Based on the findings, the participants perceived that: beads are the major materials used, the skill might occupy a female’s time and generate income. Profits realized can be substantial for the producers and sellers. The six self -samples were accepted based on colour, design, texture and shape. It can be concluded that the skill might be acquired, used to curb female idleness and unemployment. Among the recommendations stated are: bead crafts should be included in the curriculum at all levels of study, and more aware of its acceptance on mass media and fashion shows for love of beads concerning culture, value and significance.
PEMANFAATAN RUNNING TEXT SEBAGAI ALAT BANTU INFORMASI WAKTU SHOLAT DI MASJID YAYASAN DARUL HIKMAH LOMBOK TENGAH
Authors: Akbar L. Ahmad S. Irfan , Iqbal Muhamad Syamsu , Budiman Djul Fikry , Rachman A. Sjamsjiar , Wiriasto Giri Wahyu , . Sinarep
Published: February 2021

Penampil waktu yang menandakan informasi masuknya waktu sholat sering dijumpai di masjid-masjid sebagai tempat peribadatan Umat Islam, pada umumnya penampil informasi ini sudah memakai jadwal sholat digital. Namun sering ditemukan waktu sholat yang tertampil tidaklah diperuntukkan untuk daerah tersebut, sehingga kadang mempunyai selisih waktu yang cukup jauh dengan awal waktu sholat sesungguhnya. Penelitian pengabdian ini membuat penampil jadwal shalat digital yang mengacu pada jadwal yang dikeluarkan oleh badan hisab Kementerian Agama Republik Indonesia (KEMENAG). Menggunakan metode look-up tabel agar mendapatkan jadwal waktu shalat yang lebih akurat. Perangkat keras yang dibangun berbasis mikrokontroller dan menanamkan jadwal waktu shalat ke dalam EEPROM dan akan ditampilkan melalui 7-segment. Tampilan pada 7-segment berupa Jam, Menit, Tanggal, Bulan, Tahun, Shubuh, Dzuhur, Ashar, Maghrib dan Isya dengan jumlah ukuran LED Dot Matrix jenis P10 sebanyak 2 panel. Perangkat keras kemudian diberi kemampuan berkomunikasi dengan smart phone berbasis android melalui media bluetooth. Hasil yang didapatkan adalah kecepatan dalam mendapatkan data waktu sholat yang sesuai dengan lokasi dan keakuratan yang sesuai dengan sumber data jadwal sholat yang digunakan
Pemanfaatan Multimedia dalam Meningkatkan Efektivitas Pembelajaran IPA tentang Sruktur Tanah
Authors: Pranoto Pranoto
Published: February 2021

Tujuan penelitian ini adalah untuk mengetahui bagaimana pemanfaatan Multimedia dapat meningkatkan efektivitas pembelajaran IPA tentang sruktur tanah di Kelas V SDN 2 Bajur Tahun 2017-2018. Jenis penelitian ini yaitu penelitian tindakan kelas dengan langkah-langkah siklus: perencanaan, pelaksanaan, observasi, evaluasi, refleksi. Hasil penelitian menunjukkan bahwa: (1) Dengan mendesain pembelajaran melalui internet sebagai sumber belajar dapat meningkatkan prestasi belajar siswa; (2)  Jika guru dapat melaksanakan semua desain  pembelajaran yang telah dirancang dengan baik, maka akan berdampak pada peningkatan   prestasi belajar siswa; (3) Pembelajaran melalui internet juga sebagai sarana hiburan, sehingga akan menjadi menyenangkan, karena anak kembali ke    dunianya; (4) Pembelajaran Melalui internet,  mengandung prinsip learning by doing (belajar sambil melakukan sesuatu), trial and refinemen (belajar sambil mengulang-ulang dan berusaha untuk memperbaiki.
The Readibility of Articles in Electronic Book for Schools Indonesian Language Textbook
Authors: Safi'i Imam , Tarmini Wini , Sobri Sobri
Published: February 2021

The purpose of this study is to describe the readability rate of articles contained in Electronic Book for Schools (EBS), Indonesian Language textbook for High School students, The author is using Flesch Formula technique in measuring the readability of the articles, which is “RE = 206,835 – (1,015  ASL) – (84,6  ASW)”, In The said analysis, we take two paragraphs from each article as a sample for the measurement of the readability, Based on our study, we know that the average readability of an article in Electronic Book for Schools (EBS), Indonesian Language textbook is very low, which is -15,79, The result of this research can be utilized as the basis in choosing articles or texts for reference materials in teaching Indonesian language for high school students,Abstrak Tujuan penelitian ini adalah untuk menggambarkan tingkat keterbacaan artikel yang terkandung dalam Buku Sekolah Elektronik (BSE), buku teks Bahasa Indonesia untuk siswa SMA, Metode yang digunakan untuk mengukur tingkat keterbacaan adalah dengan menggunakan Formula Flesch, yaitu "RE = 206,835 - (1,015 ASL) - (84,6  ASW)", Dalam analisis tingkat keterbacaan tersebut, kami mengambil dua paragraf dari setiap artikel sebagai sampel untuk pengukuran keterbacaan, Berdasarkan penelitian kami, dapat diketahui, bahwa rata-rata keterbacaan wacana yang terdapat dalam Buku Sekolah Elektronik (BSE) buku teks Bahasa Indonesia untuk siswa SMA sangat rendah, yaitu -15,79, Hasil penelitian ini dapat digunakan sebagai dasar dalam memilih artikel atau teks untuk bahan referensi dalam pengajaran bahasa Indonesia untuk siswa sekolah menengah,
ANALISIS STABILITAS LERENG DI KAKI GUNUNG SUMBING
Authors: A Arrizka Yanuar , Yuwana Dwi Sat Agus , Amin Muhammad
Published: February 2021

Balesari village of Windusari sub-district of Magelang regency located at the foot of the mountain SUMBING with a height of 350 to 1050 meters above sea level. This research was conducted by analyse the stability of steep slopes through soil physical properties using Bishop Morgenstern method. The analytical approach used is deterministic two-dimensional. Primary data obtained from measurements of the slope directly by using Theodolite and took soil samples at each location. The soil samples were tested at the Laboratory of Soil Mechanics to get the parameters of soil physical properties such as grain gradation, void ratio ( ), the soil volume weight ( ), the friction angle ( ), the value of cohesion (c). The result of study states the value of soil cohesion in the hamlet Mojo categorized loam, while in the hamlet of Malanggaten categorized clay loam. The results of soil physical properties shows the value of the Factor of safety (F) at the measurement point in the hamlet of Mojo and Malanggaten are 0.89, 0.31 and 0.41 respectively. Thus the stability of the slope in the village is not safe.
PEMANFAATAN LIMBAH BOTTOM ASH PENGGANTI AGREGAT HALUS DENGAN TAMBAHAN KAPUR PADA PEMBUATAN PAVING
Authors: Qomaruddin Mochammad , Sudarno Sudarno
Published: February 2021

In connection with the increasing need for paving in the construction world, an effective and economical paving alternative is needed for the community. Paving constituent materials that are still relatively expensive, then the need for other materials that are cheaper without reducing the function and strength of paving itself. Waste is a dangerous material for the environment, such as waste generated PLTU Tanjung Jati B Jepara in the form of waste bottom ash, the result of burning coal that is currently increasingly accumulate because it has not got the right solution. The waste has characteristics such as paving constituents, and in addition to reducing waste that is harmful to the environment. This research is conducted in several stages, starting from the formulation of problem and objectives based on literature problems and reviews, material selection, material testing, object making, object test, data analysis, and conclusion of research result. The results of each test will be analyzed to get the accuracy. The greatest compressive strength results were obtained in the 1PC mix design: 8PS: 0BA: 1KP with a compressive strength of 167,143Kg / cm², and the lowest compressive strength was in the 1PC mix design: 5PS: 3BA: 1KP with a compressive strength of 109,286 Kg / cm². From the results, it can be said that paving in this research can be used in society, although the compressive strength is still not maximal.
 Keywords: Bottom Ash, Lime, Paving, Strong Press
ANALISIS TEBAL PERKERASAN JALAN RAYA MAGELANG-PURWOREJO KM 8 SAMPAI KM 9 MENGGUNAKAN METODE BINA MARGA 1987
Authors: Sudarno Sudarno , Fadhilah Lulut , Afif Achmad , Nurobingatun Siti , Hariyadi Heru , Mufid Abdul
Published: February 2021

Abstrak. The Highway that connect Magelang Purworejo is one of the Collector roads in Central Java. Magelang-Purworejo’s Highway has a fairly high traffic load, based on a survey conducted by LHR in 2017 of 4392 vehicles. A high enough amount of LHR causes the road to damage the hair cracked. Based on the above, the thickness of the pavement or overlay is planned. This plan begins with a survey of the number of passing vehicles for twenty-four hours (LHR), then surveying the carrying capacity of ground using DCP tools, then measuring the skill of using digital teodholit. Then look for references and secondary data in the form of traffic growth, rainfall data and road class data. After all the data obtained then calculated the thickness of road pavement using the method of Bina Marga 1987. Based on these calculations obtained the required re-layer is 3 cm.

Key word: road pavement, overlay, dynamic cone penetrometer
PENGARUH CAMPURAN GRADASI AGREGAT TERHADAP PERMEABILITAS BETON POROUS PADA APLIKASI LANTAI LABORATORIUM
Authors: Hanova Yudha , Franchitika Rizky , Nanda Nanda
Published: February 2021

Penggunaan beton porous pada lantai laboratorium merupakan salah satu upaya yang akan dilakukan untuk mengatasi genangan akibat tumpahan air dari peralatan laboratorium. Beton porous yang akan digunakan harus memiliki nilai permeabilitas dan porositas yang terukur guna mengoptimalkan fungsi penggunaan beton porous tersebut. Nilai permeabilitas dan porositas beton porous dipengaruhi oleh beberapa faktor, salah satu faktor tersebut adalah ukuran gradasi agregat.

Komposisi pembuatan beton porous mengacu pada mix design yang digunakan oleh Holcim Singapore. Agregat yang digunakan adalah aggregat alam dengan variasi gradasi tidak seragam  berdiameter 19.00 mm(#3/4), 12.50 mm(#1/2), dan 9.50 mm(#3/8). Sampel dibuat menjadi tiga variasi gradasi agregat dengan perbandingan (1(#3/4):2(#1/2):1(#3/8)); (2(#3/4):1(#1/2):1(#3/8); dan (1(    #3/4):1(#1/2):2(#3/8). Masing-masing 5 sampel. Sampel berbentuk silinder berdiameter 4 inci dengan ketebalan 15 cm.

Nilai Permeabilitas rata-rata terbesar terjadi pada variasi campuran gradasi agregat (1(#3/4) : 2(#1/2) : 1(#3/8)) sebesar 0,58 cm/det dengan porositas rata-rata 7,35 %. Variasi gradasi agregat dalam penelitian ini tidak mempengaruhi permeabilitas dan porositas secara signifikan.
Analisis Pengaruh Bentuk Paving Block Terhadap Kelendutan Perkerasan Jalan
Authors: Mudiyono Rachmat , Tsani Nadia Salsabilla
Published: February 2021

Perkerasan paving block atau Concrete Block Pavement (CBP) banyak digunakan dan menjadi pilihan yang menarik untuk perkerasan jalan. Variasi bentuk yang banyak dan mudah di aplikasikan menjadikan paving block sering digunakan pada perkerasan jalan di kawasan perkotaan maupun perumahan,paving block yang dibedakan menjadi 3 kategori yaitu four dented, two dented dan no dented. Ketiga jenis kategori paving block tersebut memiliki spesifikasi dan bentuk penguncian atau interlockingnya yang berbeda. Dengan menganalisa beberapa kategori paving block menggunakan portal dan alat sederhana yang bertujuan untuk mengetahui lendutan yang terjadi serta interlockingnya dengan menggunakan laying patern yang bebeda dan jarak sambung paving 3 mm, 4 mm, 5 mm. Analisa hasil praktikum yang didapatkan lendutan maksimum pada paving block bentuk bata menggunakan laying patern Strecher bond dan tanpa menggunakan bedding sand sebesar 5,8 cm. dan lendutan terkecil terjadi pada paving unipave (cacing) dengan jarak sambung sebesar 3 mm yaitu sebesar 1,3 cm. Lendutan itu terjadi bahwa bentuk-bentuk paving block sangat mempengaruhi terhadap kelendutan paving block, sehingga semakin besar ukuran tebal dan bentuk paving block maka kelendutan yang terjadi pada paving block semakin besar dan itu di miliki pada paving block jenis bata, sedangkan jika paving block memiliki ukuran tebal dan bentuk yang lebih kecil maka kelendutan yang terjadi pada paving block tersebut semakin kecil. Interlocking pada paving block juga mempengaruhi kelendutan yang terjadi pada paving block, Interlocking yang terjadi pada paving block ketiga jenis yang kami gunakan mempunyai penguncian yang berbeda. Semakin besar jarak interlockingnya pada paving block unipave, unidecore maupun bata maka lendutan yang terjadi akan semakin besar. Tetapi jika paving block memiliki interlocking semakin kecil maka akan mengurangi lendutan yang terjadi pada paving block.
KEPADATAN URUGAN TANAH PADA PEKERJAAN PENATAAN LINGKUNGAN RUMAH NELAYAN KEDUNGMALANG KAB. JEPARA MENGGUNAKAN PENDEKATAN STANDART PROCTOR & SANDCONE
Authors: Saputro Yayan Adi , Umam Khotibul , Kakantini Dhian Marhaendri
Published: February 2021

Pekerjaan penataan lingkungan rumah nelayan kedungmalang kab. Jepara merupakan kegiatan oleh DPUPR Kabupaten Jepara Tahun 2018. Pada kegiatan ini harus menghasilkan pekerjaan sesuai dengan spesifikasi teknis yang telah ditentukan. Lokasi pekerjaan dilaksanakan di kecamatan Kedung kabupaten Jepara. Ada beberapa hal yang perlu diperhatikan dalam melaksanakan kegiatan urugan tanah, mulai dari tanah yang dipakai, metode pemadatan dan penentuan jumlah lintasan pemadatan sesuai dengan spesifikasi yang ada. Pada penelitian ini untuk memperoleh nilai kepadatan urugan tanah menggunakan pendekatan standart proctor dan sandcone. Hasil dari pengujian ini akan diperoleh nilai kepadatan dari perbandingan 2 metode pemadatan. Hasil dari penelitian ini adalah Dari hasil pengujian Density sampel 1 sampai sampel 6 yakni berturut-turut senilai 1,41 g/cm3, 1,49 g/cm3, 1,57 g/cm3, 1,59 g/cm3, 1,67 g/cm3, 1,69 g/cm3. Hal ini berbanding lurus dengan hasil avarage moisture content yakni 26,6 %, 29,9 %, 33,4 % 34,3%, 38,0%, 40,3%.Specific Gravity diperoleh nilai sebesar 2,65 hal ini menunjukkan bahwa tanah yang digunakan masuk kategori tanah lempung organik. Pengujian sandcone ini sejumlah 5 sampel diperoleh hasil 95,08%, 97,54%, 98,36%, 96,72% dan 95,90%. menunjukkan bahwa kepadatan sudah masuk dalam spesifikasi  pekerjaan timbunan tanah untuk perumahan dengan nilai kepadatan > 95%
PEMANFAATAN LIMBAH BETON SEBAGAI PENGGANTI AGREGAT KASAR PADA PERKERASAN LASTON ASPHALT CONCRETE – WEARING COARSE (AC-WC)
Authors: Imannurohman Naufal , Sudarno Sudarno , Amin Muhammad
Published: February 2021

Meningkatnya pembangunan infrastruktur seperti gedung, jembatan, jalan, dan berbagai fasilitas publik lainnya yang banyak menggunakan bahan beton dapat mengakibatkan kerusakan lingkungan akibat limbah beton yang tidak dilakukan penanganan dengan serius. Untuk membatasi penggunaan agegat baru (fresh aggregate) dari alam ini sudah banyak dikembangkan teknologi daur ulang untuk perkerasan jalan. Tujuan penelitian ini untuk Mengetahui pengaruh limbah beton sebagai pengganti agregat kasar pada campuran laston (AC-WC) untuk perkerasan jalan raya terhadap nilai karakteristik marshall.

Penelitian ini menggunakan metode eksperimen dan pengujian marshall dengan percobaan serta perbandingan sesuai dengan kadar variasi limbah beton sebagai pengganti agregat kasar 0%, 10%, 15%, dan 20% dan variasi kadar aspal 5%, 5,5%, 6%, 6,5% sesuai Spesifikasi Bina Marga Revisi 3 (2010). Metode analisis data pada penelitian ini menggunakan analisis ANOVA (Analysis of Variance) satu arah.
Hasil yang didapat dari pengujian ini dihasilkan pengaruh nilai karakteristik marshall dengan kadar aspal optimum 6% menggunakan limbah beton optimum 15% yang berpengaruh baik terhadap nilai karakteristik marshall seperti nilai stabilitas sebesar 1869,30 kg, Flow sebesar 3,17 mm, VFB sebesar 76,97%, VMA sebesar 16,64 %, VIM sebesar 3,83% dan  MQ sebesar 590,97 kg/mm. Dengan demikian campuran tersebut sesuai dengan persyaratan Spesifikasi Teknis Bina Marga 2010, Revisi 3
ANALISIS PENGARUH HAMBATAN SAMPING DAN PELICAN CROSSING TERHADAP KAPASITAS JALAN (Studi Kasus: Jalan Tidar, Kota Magelang)
Authors: Audina Salya , Sudarno Sudarno , Yuwana Sat Agus
Published: February 2021

Fasilitas pelengkap jalan yang paling penting bagi pejalan kaki adalah jalur pedestrian. Mobilitas pejalan kaki memiliki fasilitas yang kurang tercukupi, sehingga terjadi lalulintas yang semerawut. Tujuan penelitian ini yaitu untuk mengetahui tingkat pelayanan jalan akibat hambatan samping, hubungan antara pelican crossing dengan kapasitas jalan terhadap panjang antrian dan kebutuhan fasilitas penyeberang jalan yang ideal dalam meningkatkan tingkat pelayanan jalan. Penelitian ini menggunakan metode PKJI 2014 dengan cara data arus lalulintas yang diperoleh dibagi dengan kapasitas jalan untuk memperoleh tingkat pelayanan jalan. Gelombang kejut digunakan untuk mendapatkan panjang antrian kendaraan yang diperoleh dari hubungan antar parameter lalulintas. Fasilitas penyeberang jalan yang ideal didapat dari PV2 dari data survei. Hasil yang diperoleh yaitu tingkat pelayanan jalan akibat hambatan samping di Jalan Tidar yang terendah yaitu pada hari Selasa, 17 Desember 2019 pada jam 16.00-17.00 didapat nilai D, yaitu arus mendekati tidak stabil tetapi kecepatan masih bisa dikendalikan. Hubungan antara pelican crossing terhadap panjang antrian di Jalan Tidar yaitu panjang antrian maksimum (QM) yang dihasilkan adalah 0,08720454949 km atau 87,20 m. Berdasarkan Tata Cara Perencanaan Fasilitas Pejalan Kaki di Kawasan Perkotaan (1995), hasil PV2 yang diperoleh yaitu 7,613x109. Fasilitas penyeberang jalan yang ideal di Jalan Tidar menggunakan pelican dengan pelindung.
STUDI KOMPARASI KUAT GESER BALOK KASTELA MODIFIKASI DARI PROFIL IWF
Authors: Murtopo Ali , Darajat Achmad Rafi'ud , Prawenti Herlita
Published: February 2021

Castellated steel beam is an engineered profile of steel beams to optimize its flexural strength. The consequence of this engineering is that the shear strength becomes weak because there are openings in the web. Researches to improve the shear strength of castellated beams has been carried out by modification these beams. Comparison is needed to determine the most optimal of castellated steel beam modification shear strength. The comparative method is carried out on existing research of modified castellated steel beams made from 150x75x7x5 IWF steel profiles, modifications in the form of openings engineering and the addition of stiffeners to openings and static testing. Types of beams that are compared includes original castellated beam, original castellated beam with lateral stiffeners, modified castellated beam with elbow steel stiffeners, modified castellated beam with reinforced steel diagonal stiffeners, and modified castellated beam with full rectangular openings and reinforced steel diagonal stiffeners. The comparison results show that modified castellated beam with full rectangular openings and reinforced steel diagonal stiffener have the most optimal shear strength with an increase of 146.54% compared to the original castellated beam.