bluuebunny/crossref_metadata_2025 huggingface dataset:
Bifurcation analysis in a delayed toxic-phytoplankton and zooplankton ecosystem with Monod-Haldane functional response
Authors: Jiang Zhichao , Zhang Zexian , Jie Maoyan
Published: February 2021

We structure a phytoplankton zooplankton interaction system by incorporating (i) Monod-Haldane type functional response function; (ii) two delays accounting, respectively, for the gestation delay \begin{document}$ \tau $\end{document} of the zooplankton and the time \begin{document}$ \tau_1 $\end{document} required for the maturity of TPP. Firstly, we give the existence of equilibrium and property of solutions. The global convergence to the boundary equilibrium is also derived under a certain criterion. Secondly, in the case without the maturity delay \begin{document}$ \tau_1 $\end{document}, the gestation delay \begin{document}$ \tau $\end{document} may lead to stability switches of the positive equilibrium. Then fixed \begin{document}$ \tau $\end{document} in stable interval, the effect of \begin{document}$ \tau_1 $\end{document} is investigated and find \begin{document}$ \tau_1 $\end{document} can also cause the oscillation of system. Specially, when \begin{document}$ \tau = \tau_1 $\end{document}, under certain conditions, the periodic solution will exist with the wide range as delay away from critical value. To deal with the local stability of the positive equilibrium under a general case with all delays being positive, we use the crossing curve methods, it can obtain the stable changes of positive equilibrium in \begin{document}$ (\tau, \tau_1) $\end{document} plane. When choosing \begin{document}$ \tau $\end{document} in the unstable interval, the system still can occur Hopf bifurcation, which extends the crossing curve methods to the system exponentially decayed delay-dependent coefficients. Some numerical simulations are given to indicate the correction of the theoretical analyses.
On the Lorenz '96 model and some generalizations
Authors: Kerin John , Engler Hans
Published: February 2021

In 1996, Edward Lorenz introduced a system of ordinary differential equations that describes a scalar quantity evolving on a circular array of sites, undergoing forcing, dissipation, and rotation invariant advection. Lorenz constructed the system as a test problem for numerical weather prediction. Since then, the system has also found use as a test case in data assimilation. Mathematically, this is a dynamical system with a single bifurcation parameter (rescaled forcing) that undergoes multiple bifurcations and exhibits chaotic behavior for large forcing. In this paper, the main characteristics of the advection term in the model are identified and used to describe and classify possible generalizations of the system. A graphical method to study the bifurcation behavior of constant solutions is introduced, and it is shown how to use the rotation invariance to compute normal forms of the system analytically. Problems with site-dependent forcing, dissipation, or advection are considered and basic existence and stability results are proved for these extensions. We address some related topics in the appendices, wherein the Lorenz '96 system in Fourier space is considered, explicit solutions for some advection-only systems are found, and it is demonstrated how to use advection-only systems to assess numerical schemes.
Large region inpainting by re-weighted regularized methods
Authors: Chen Yiting , Li Jia , Yu Qingyun
Published: February 2021

In the development of imaging science and image processing request in our daily life, inpainting large regions always plays an important role. However, the existing local regularized models and some patch manifold based non-local models are often not effective in restoring the features and patterns in the large missing regions. In this paper, we will apply a strategy of inpainting from outside to inside and propose a re-weighted matching algorithm by closest patch (RWCP), contributing to further enhancing the features in the missing large regions. Additionally, we propose another re-weighted matching algorithm by distance-based weighted average (RWWA), leading to a result with higher PSNR value in some cases. Numerical simulations will demonstrate that for large region inpainting, the proposed method is more applicable than most canonical methods. Moreover, combined with image denoising methods, the proposed model is also applicable for noisy image restoration with large missing regions.
Origin-to-destination network flow with path preferences and velocity controls: A mean field game-like approach
Authors: Bagagiolo Fabio , Maggistro Rosario , Pesenti Raffaele
Published: February 2021

In this paper we consider a mean field approach to modeling the agents flow over a transportation network. In particular, beside a standard framework of mean field games, with controlled dynamics by the agents and costs mass-distribution dependent, we also consider a path preferences dynamics obtained as a generalization of the so-called noisy best response dynamics. We introduce this last dynamics to model the fact that the agents choose their path on the basis of both the network congestion state and the observation of the agents' decision that have preceded them. We prove the existence of a mean field equilibrium obtained as a fixed point of a map over a suitable set of time-varying mass-distributions, defined edge by edge in the network. We also address the case where the admissible set of controls is suitably bounded depending on the mass-distribution on the edge itself.
Implementing E-learning Training toward English Virtual Lecturers: The Process, Perspectives, Challenges and Solutions
Authors: Apriani Eka , Syafryadin Syafryadin , Inderawati Rita , Arianti Arin , Wati Sakdiah , Hakim Ihsan Nul , Noermanzah Noermanzah
Published: February 2021

This study was aimed to know the e-learning training implementation which involved the lecturers’ perspective, the barriers and its solution. This study involved 50 postgraduate lecturers, however only 9 Master of English education lecturers who participated in this training. The research design of this study was qualitative research which applied observation checklist, interview and note taking as the instruments to collect the data. The data analysis of this study used qualitatively which comprise several steps, such as collect the data, think about the data, code the data, did reflection on data, organizing the data, and interpreting the data. The findings showed that the implementation of e-learning has been done by the trainer, however, there were problems that occurred during the implementation of this training, such as discipline of time, the understanding of the material, electricity, internet connection, module and the age. These problems had been solved by the trainer. The trainer provided the assistant to help them in handling this training. Another finding was most the lecturers had positive perspective about e-learning training because this e-learning training could assist them in teaching, but there were still two until four participants who gave negative perspective about the training.
How Engaging Are You? Empirical Evidence from Malaysian Research Universities
Authors: Rosman Mohamad Rahimi Mohamad , Ismail Mohd Nasir , Noorman Masrek Mohamad
Published: February 2021

Digital library engagement is the extensive use of digital library features and services. Contrary to the traditional concept of usage, DL engagement evaluates the use of an information system based on multiple dimensions; affective, cognitive, and behavioural. Presently, there is scarce evidence and research on the level of DL engagement. Lack of such evidence caused under-utilization of DL resources. Therefore, the purpose of this study is to investigate the level of DL engagement in the context of Malaysian research universities. A quantitative study was conducted; an instrument was distributed to postgraduate students at five Malaysian research universities. A total of 492 responses were recorded and descriptively analyses using Statistical Package for Social Sciences version 24. Frequency, Independent sample t-test, and Analysis of Variance (ANOVA) were performed to identify significance difference and mean distribution of data among the participating universities. Results show that respondent’s age and research domain showed a significant effect on DL engagement, while gender, study mode, level of study, semester, and the university did not show any significant effect on DL engagement.
Efeito agudo do alongamento estático sobre o desempenho e atividade eletromiográfica da musculatura antagonista
Authors: Silva Tamara Karina , Peixoto César Eurico
Published: February 2021

O objetivo foi verificar o efeito agudo do alongamento estático (AE) dos músculos Ísquiotibiais sobre o desempenho da força e ativação mioelétrica (EMGRMS) da musculatura antagonista. Doze homens (20,28 ± 1,50 anos; 83,35 ± 17,86 Kg; 177,28 ± 9,64 cm) experientes em treinamento de força foram divididos aleatoriamente nos grupos AE e controle (GC). No AE foram realizadas três repetições de 30s de alongamento estático nos Ísquiotibiais e em seguida foi medida a amplitude de movimento (ADM). Logo após, foi medido o desempenho da força e EMGRMS dos músculos vasto lateral (VL) e vasto medial (VM) durante o teste de 10-RM na cadeira extensora.  A ANOVA de duas entradas encontrou diferença significativa na ADM no efeito principal tempo (P = 0,019), quanto para interação grupo x tempo (P = 0,023), com aumento significativo na ADM após o alongamento (P = 0,013). O número de repetições do AL aumentou significativamente (P = 0,014; 16%) em relação ao GC. Não houve mudança significativa no EMGRMS de nenhum dos músculos testados. O emprego do alongamento estático pode melhorar o desempenho da força na musculatura antagonista.
Source and spread dynamics of mountain pine beetle in central Alberta, Canada
Authors: Shegelski Victor A. , Campbell Erin O. , Thompson Kirsten M. , Whitehouse Caroline M. , Sperling Felix A.H.
Published: February 2021

The mountain pine beetle (Dendroctonus ponderosae Hopkins) (Coleoptera: Curculionidae) is a significant destructive force in the pine forests of western Canada and has the capacity to spread east into a novel host tree species, jack pine (Pinaceae). New populations have been documented in central Alberta, Canada, but the source populations for these outbreaks have yet to be identified. In this study, we use genetic data to identify parent populations for recent outbreak sites near Slave Lake, Lac La Biche, and Hinton, Alberta. We found the northern population cluster that entered Alberta near Grande Prairie was the source of the most eastern established population near Lac La Biche, and the range expansion to this leading-edge population has been too rapid to establish evidence of population structure. However, some dispersal from a population in the Jasper and Hinton area has been detected as far north and east as Slave Lake, Alberta. We also identified two potential source populations for the current outbreak in Hinton: most beetles appear to be from Jasper National Park, Alberta, but some also originated from the northern population cluster. These findings demonstrate the dynamic dispersal capabilities of mountain pine beetle across the Alberta landscape and the potential hazard of increased dispersal to newly established leading-edge populations.
Management of COVID-19 in cancer patients receiving cardiotoxic anti-cancer therapy. Future recommendations for cardio-oncology
Authors: Kobat Hasan , Elkonaissi Islam , Dorak Mehmet Tevfik , Nabhani-Gebara Shereen
Published: February 2021

Cardiotoxicity induced by anti-cancer treatment has become a significant threat as the number of cardiotoxic anti-cancer agents is growing. Cancer patients are at an increased risk of contracting coronavirus disease 2019 (COVID-19) because of immune suppression caused by anti-cancer drugs and/or supportive treatment. Deterioration in lung functions due to COVID-19 is responsible for many cardiac events. The presence of COVID-19 and some of its treatment modalities may increase the chance of cardiotoxicity development in cancer patients receiving potentially cardiotoxic agents. This review provides evidence-based information on the cardiotoxicity risk in cancer patients clinically diagnosed with COVID-19 who are receiving potentially cardiotoxic anti-cancer agents. Proposed strategies relating to the management of this patient cohorts are also discussed.
Simple peeling of planar maps with application to site percolation
Authors: Budd Timothy , Curien Nicolas
Published: February 2021

The peeling process, which describes a step-by-step exploration of a planar map, has been instrumental in addressing percolation problems on random infinite planar maps. Bond and face percolations on maps with faces of arbitrary degree are conveniently studied via so-called lazy-peeling explorations. During such explorations, distinct vertices on the exploration contour may, at latter stage, be identified, making the process less suited to the study of site percolation. To tackle this situation and to explicitly identify site-percolation thresholds, we come back to the alternative “simple” peeling exploration of Angel and uncover deep relations with the lazy-peeling process. Along the way, we define and study the random Boltzmann map of the half-plane with a simple boundary for an arbitrary critical weight sequence. Its construction is nontrivial especially in the “dense regime,” where the half-planar random Boltzmann map does not possess an infinite simple core.
Общий антиканонический элемент для трехмерных экстремальных стягиваний с одномерными слоями: исключительный случай
Authors: Mori Shigefumi , Prokhorov Yuri Gennadievich
Published: February 2021

Пусть $(X, C)$ - росток трехмерного многообразия $X$ с терминальными особенностями вдоль связной приведенной полной кривой $C$, допускающего стягивание $f\colon (X, C) \to (Z, o)$ такое, что $C = f^{-1} (o)_{\mathrm{red}}$ и $-K_X$ является $f$-обильным. Предположим, что каждая неприводимая компонента $C$ содержит не более одной точки индекса $>2$. Мы докажем, что общий элемент $D\in |{-}K_X|$ является нормальной поверхностью с дювалевскими особенностями.
Библиография: 16 названий.
Analysis of misconceptions in chemical equilibrium among senior secondary school students in Ilesa Metropolis in Osun State, Niger
Authors: Omilani Nathaniel , Elebute F. D.
Published: February 2021

Physical chemistry has been an aspect of chemistry which students find difficult at the secondary and tertiary levels of education. In the past, the effort of researchers has been focused on the research that will identify various causal factors which can be attributed to the performance of the learners in this aspect of chemistry. Also, very few experimental studies, has been carried out to improve students’ performance. In order to find the right bases for all research that will improve students’ achievement, there is a need to profile the misconceptions in the aspect of physical chemistry which is chemical equilibrium. The purpose of this study is to determine students’ misconceptions regarding the concepts of chemical equilibrium. To diagnose students' misconceptions in this area, a two-tier multiple-choice question on chemical equilibrium test was administered to 300 high school students in Ilesa Metropolis of Osun- state, Nigeria. Descriptive analysis was used in analyzing the data, students’ responses in a Chemical Equilibrium Misconception Test (CEMT) were categorized. The results revealed widespread misconceptions among students in the areas related to (1) equilibrium constant (2) heterogeneous Equilibrium (3) Approach to chemical equilibrium, (4) Application of Le-Chatelier Principle and (5) adding a catalyst.
RASSLE: Return Address Stack based Side-channel LEakage
Authors: Chakraborty Anirban , Bhattacharya Sarani , Alam Manaar , Patranabis Sikhar , Mukhopadhyay Debdeep
Published: February 2021

Microarchitectural attacks on computing systems often stem from simple artefacts in the underlying architecture. In this paper, we focus on the Return Address Stack (RAS), a small hardware stack present in modern processors to reduce the branch miss penalty by storing the return addresses of each function call. The RAS is useful to handle specifically the branch predictions for the RET instructions which are not accurately predicted by the typical branch prediction units. In particular, we envisage a spy process who crafts an overflow condition in the RAS by filling it with arbitrary return addresses, and wrestles with a concurrent process to establish a timing side channel between them. We call this attack principle, RASSLE 1 (Return Address Stack based Side-channel Leakage), which an adversary can launch on modern processors by first reverse engineering the RAS using a generic methodology exploiting the established timing channel. Subsequently, we show three concrete attack scenarios: i) How a spy can establish a covert channel with another co-residing process? ii) How RASSLE can be utilized to determine the secret key of the P-384 curves in OpenSSL (v1.1.1 library)? iii) How an Elliptic Curve Digital Signature Algorithm (ECDSA) secret key on P-256 curve of OpenSSL can be revealed using Lattice Attack on partially leaked nonces with the aid of RASSLE? In this attack, we show that the OpenSSL implementation of scalar multiplication on this curve has varying number of add-and-sub function calls, which depends on the secret scalar bits. We demonstrate through several experiments that the number of add-and-sub function calls can be used to template the secret bit, which can be picked up by the spy using the principles of RASSLE. Finally, we demonstrate a full end-to-end attack on OpenSSL ECDSA using curve parameters of curve P-256. In this part of our experiments with RASSLE, we abuse the deadline scheduler policy to attain perfect synchronization between the spy and victim, without any aid of induced synchronization from the victim code. This synchronization and timing leakage through RASSLE is sufficient to retrieve the Most Significant Bits (MSB) of the ephemeral nonces used while signature generation, from which we subsequently retrieve the secret signing key of the sender applying the Hidden Number Problem.

1RASSLE is a non-standard spelling for wrestle.
Action Research in Practice: Issues and Challenges in a Financial Services Case Study
Authors: Marshall Peter , Wilson Phyl , de Salas Kristy , McKay Judy
Published: February 2021

In this paper we give a direct and personal account of the issues and challenges that occurred in an action research study. The research team consisted of five researchers from two Australian universities. The action research case was carried out in a small financial services company and concerned the development of an information systems strategy. However, the focus of the paper is not on information systems, but on the general methodological issues and problems of action research. The authors hope that readers will benefit from the direct and transparent account of the practical methodological problems encountered in the study.
Computer Aided Phenomenography: The Role of Leximancer Computer Software in Phenomenographic Investigation
Authors: Penn-Edwards Sorrek
Published: February 2021

The qualitative research methodology of phenomenography has traditionally required a manual sorting and analysis of interview data. In this paper I explore a potential means of streamlining this procedure by considering a computer aided process not previously reported upon. Two methods of lexicological analysis, manual and automatic, were examined from a phenomenographical perspective and compared. It was found that the computer aided process - Leximancer - was a valid investigative tool for use in phenomenography. Using Leximancer was more efficacious than manual operation; the researcher was able to deal with large amounts of data without bias, identify a broader span of syntactic properties, increase reliability, and facilitate reproducibility. The introduction of a computer aided methodology might also encourage other qualitative researchers to engage with phenomenography.
Criminal Careers and Cognitive Scripts: An Investigation into Criminal Versatility
Authors: Gavin Helen , Hockey David
Published: February 2021

"Criminal careers" denotes ways in which offenders develop specialisms and versatility, but studies linking delinquency to social skills deficits have not attempted to explore cognitive, internalised processes by which such "careers" might be chosen. This study investigated criminal minds via script theory: "internal" scripts are used to guide behaviour, "situational" scripts are knowledge of everyday events, and "personal" scripts are a sequence of actions towards a desired goal. This research investigated whether criminal career offenders develop situational scripts for offending and whether such situational scripts express an internalised identity, which manifests as a personal script. Thematic analysis of data derived from "criminal career offenders" supports the notion of criminal situational scripts, with emergent themes considered evidence of personal scripts.
From Qualitative Dissertation to Quality Articles: Seven Lessons Learned
Authors: Bowen Glenn
Published: February 2021

New scholars frequently face an immense challenge in writing papers for publication. Qualitative research novices, in particular, experience frustration in getting peer-reviewed papers published in top-tier journals. This article is a primer on converting a dissertation based on qualitative research into a journal article. It summarizes seven lessons, learned over a five-year period, about getting published. The lessons focus attention on manuscript content and style, the publication process, and working relationships.
The Four Key Factors That Drive Successful Decisions
Authors: Yeager Joseph , Sommer Linda
Published: February 2021

The mechanisms of language operate as the vehicles for motivation, thinking and deciding. Language is a replica, a model, a representational map of reality. In the same way that a flawed roadmap will misrepresent reality and mislead a traveler, a flawed linguistic rationale will mislead a decision maker in any situation. In high-stakes situations that occur in globalized organizations, such as the current economic meltdown, the importance and consequences of flawed linguistic rationales are obvious. Simple suggestions for self examination of linguistic rationales are offered.
Psychotherapeutic Treatment in Combination with Relaxation in a Flotation Tank: Effects on "Burn-Out Syndrome"
Authors: Kjellgren Anette , Buhrkall Hanne , Norlander Torsten
Published: February 2021

The focus of this study was to investigate experiences gained from treatment combining relaxation in flotation tank with psychotherapy for sufferers from "burn-out syndrome". Six people participated in a ten week program. They were all interviewed; the data were analyzed using the Empirical Phenomenological Psychological method. Five themes emerged: (a) direct experiences during flotation, (b) effects due to the treatment sessions, (c) psychological transformation, (d) reflections about the treatment program, and (e) demanding and rewarding psychological process over time. All participants went through psychological transformations and improvements in quality of life. At the end of the treatment program, all participants were able continue working full time. This combined program seems to be more therapeutically beneficial than flotation tank treatment alone.
A Grounded Theory Approach: Conceptions of Understanding in Engineering Mathematics Learning
Authors: Khiat Henry
Published: February 2021

Mathematics is of utmost importance in engineering courses but studies on engineering students' conceptions of understanding in mathematics learning are found lacking in the literature. Therefore, this research attempts to address the above issue by answering the research question: "What are engineering students' conceptions of understanding in mathematics learning?" It employs the grounded theory methodology (Strauss & Corbin, 1990, 1998) and data are collected from in depth interviews with a total of 21 students and six lecturers. The substantive theory of engineering mathematics understanding (comprising of conceptual, functional, procedural, disciplinary and associational understanding) emerges in this study. The emergence of functional, disciplinary and associational understanding is unique in the context of engineering mathematics learning and has implications on successful engineering problem solving.
Female Drug Offenders Reflect on their Experiences with a County Drug Court Program
Authors: Roberts James , Wolfer Loreen
Published: February 2021

This paper examines the experiences of a group of female drug offenders who successfully completed a county drug court program in northeast Pennsylvania. Using the constant comparative method, we analyzed interviews with these women for thematic patterns in order to provide an evaluation of this program based on participants' subjective perceptions of its strengths and weaknesses. While other drug court evaluations identify rewards for good behavior and compassionate program staff as important contributing factors to participants' success, women in this study credited their recovery and successful completion of the program primarily to fear of punishment and program structure. Our analysis also revealed patterns of improved self-images, improved physical and mental health, improved coping mechanisms, and improved interpersonal relationships. We end the paper with a discussion of implications for future research.
Mandatory Identification Bar Checks: How Bouncers Are Doing Their Job
Authors: Monk-Turner Elizabeth , Allen John , Casten John , Cowling Catherine , Gray Charles , Guhr David , Hoofnagle Kara , Huffman Jessica , Mina Moises , Moore Brian
Published: February 2021

The behavior of bouncers at on site establishments that served alcohol was observed. Our aim was to better understand how bouncers went about their job when the bar had a mandatory policy to check identification of all customers. Utilizing an ethnographic decision model, we found that bouncers were significantly more likely to card customers that were more casually dressed than others, those who were in their 30s, and those in mixed racial groups. We posit that bouncers who failed to ask for identification did so because they appeared to know customers, they appeared to be of age, or they took a break and no one was checking for identification at the door. We found that bouncers presented a commanding presence by their dress and demeanor. Bouncers, we posit, function in three primary roles: customer relations, state law management, and establishment rule enforcer.
Growing…But Constrained: An Exploration of Teachers' and Researchers' Interactions with Culture and Diversity through Personal Narratives
Authors: Hairston Kimetta , Strickland Martha
Published: February 2021

Educators from all realms of education who engage in in-depth conversations and reflections about personal experiences and perspectives related to diversity are significantly important to the cultural understandings in Education. This paper is a narrative analysis of how teachers who were enrolled in a Master's Program from two university campuses of the same predominantly White university participated in an in-depth look at their diverse cultural experiences through reflection and dialogue. Two researchers, one African American female utilizing the Critical Race Theory perspective the other Caucasian female using Socio-constructivism, interacted with one another and the teachers' narratives through several personal experiences interchanges. The resulting teacher/research dialogue on culture and diversity revealed how when the constraints of different theoretical frameworks and past encounters with culture and diversity are exposed a space for dialogue on culture and diversity, characterized by growth, opens up.
Validating the Mexican American Intergenerational Caregiving Model
Authors: Escandón Socorro
Published: February 2021

The purpose of this study was to substantiate and further develop a previously formulated conceptual model of Role Acceptance in Mexican American family caregivers by exploring the theoretical strengths of the model. The sample consisted of women older than 21 years of age who self-identified as Hispanic, were related through consanguinal or acquired kinship ties to an elder, and had provided at least one intermittent service (without pay at least once a month). A comparative analysis method was used to test the existing theory, which consists of four phases: (a) Introduction/Early Caregiving Experiences, (b) Role Reconciliation, (c) Role Imprint, and (d) Providing/Projecting Care. Results substantiated and elaborated all four phases and 14 categories of the existing model. This study provides further evidence that the intergenerational caregiving Role Acceptance model can be used to study Hispanic caregivers in varied geographic locations. It also provides a framework for comparison with other groups of caregivers. In addition, results inform health professionals about the ways in which Hispanic caregivers view caregiving. This information has the potential to increase cultural competence in the delivery of health care to elders and their families.
KAJIAN MAKNA PANIL 13, PADA RELIEF LALITAVISTARA CANDI BOROBUDUR
Authors: Hidayanto Andi Farid
Published: February 2021

Borobudur temple in Indonesia as the largest temple is the ancestral filled with meaning stored in it. both in terms of shape, dimensions, levels, and reliefs. The reliefs depict an ongoing narrative between the panels with other woods panels forming the course of a story. To learn the hidden meaning in these panels can be used several methods. one of which is a method of iconography. with this method in order to obtain proper perspective to understand the background of an object being observed so that helps provide information on the history, politics, and life at a time. so as to know what the meaning is stored in one of the panels.

Candi Borobudur sebagai candi terbesar di Indonesia merupakan peninggalan nenek moyang yang penuh dengan makna yang tersimpan di dalamnya. Baik dari sisi bentuk, dimensi, tingkatan maupun reliefnya. Relief-relief tersebut menggambarkan suatu cerita yang berkesinambungan antara panil satu dengan panil lainnya membentuk jalannya sebuah cerita. Untuk mempelajari makna yang tersembunyi pada panil tersebut dapat digunakan beberapa metode. Salah satunya adalah metode Ikonografi. Dengan metode ini agar dapat diperoleh sudut pandang yang tepat untuk memahami latar belakang suatu objek yang diamati sehingga membantu memberi keterangan mengenai sejarah, politik, serta kehidupan pada suatu masa. Sehingga dapat diketahui apa makna yang tersimpan dalam suatu panil tersebut.
DESAIN PERANCANGAN AREAL KERJA DAN PENGUKURAN WAKTU BAKU PRODUKSI PRODUK MAKANAN LEMPOK DURIAN SEBAGAI MAKANAN KHAS DAERAH KOTA SAMARINDA
Authors: Cahyadi Dwi , . Suparno
Published: February 2021

Lempok durian adalah makanan sejenis dodol dengan bahan utama dari buah durian yang merupakan makanan olahan tradisional andalan masyarakat kota Samarinda. Pembuatan lempok ini dilakukan secara turun temurun oleh masyarakat dengan teknologi sederhana. Dari observasi di areal kerja, proses produksi lempok masih kurang dari standar ergonomi dilihat dari sudut lingkungan fisik kerja seperti tingkat pencahayaan dan tingkat kebisingannya serta layout ruangnya. Permasalahan lainnya adalah belum adanya standar waktu baku bagi seorang pekerja untuk memproduksi lempok durian. Penelitian ini ditujukan untuk merancang areal kerja yang ergonomis dengan mengukur tingkat kebisingan, intensitas pencahayaan dan merancang layout ruangan yang ergonomis serta mengukurwaktu baku dalam proses produksi pembuatan lempok durian. Metode yang digunakan adalah analisis lingkungan fisk kerja, analisis layout ruangan dan pengukuran serta perhitungan waktu baku. Dari hasil penelitian diperoleh hasil tingkat pencahayaan 90 – 110 lux dan tingkat kebisingan 55 – 66 db serta usulan perubahan layout ruangan. Sedangkan untuk waktu baku dari hasil pengukuran dan perhitungan adalah 62 menit.
DESAIN SARANA BAWA PERALATAN PANAHAN UNTUK KEPERLUAN LATIHAN RUTIN
Authors: Vincentius Royke , P Cicik Okta
Published: February 2021

Panahan telah berkembang dari fungsinya sebagai keahlian untuk bertahan hidup (berburu), menjadi sarana berperang, menjadi seni, menjadi bentuk olahraga dan kini telah berkembang lebih jauh menjadi sebuah identitas gaya hidup. Di Samarinda panahan yang tadinya hanya merupakan salah satu bentuk olahraga yang dikembangkan untuk tujuan kompetisi, kini berkembang menjadi sebuah bagian gaya hidup dan hoby sebagaimana beberapa olahraga lain seperti renang dan basket. Perubahan fungsi panahan tersebut berpengaruh pula pada perubahan jenis kebutuhan sarana bawa. Saat ini belum terdapat sarana bawa peralatan olahraga panahan untuk keperluan latihan rutin.Untuk keperluan latihan rutin dengan studi kasus penggemar olahraga panahan di Samarinda, dibuatlah desain sarana bawa peralatan panahan berbentuk softcase. Dengan sarana bawa ini, peralatan panahan dapat dibawa dalam bentuk terurai untuk kemudian dirakit saat sampai di tempat latihan. Sarana bawa semacam ini sesuai untuk digunakan untuk keperluan latihan yang lebih membutuhkan sarana bawa yang nyaman digunakan.
REDESAIN MEJA MAKAN LIPAT MINIMALIS MODERN
Authors: H Roni , Saputra Muhammad Irvan
Published: February 2021

Pada kontrakan type 36 sebagian besar pengguna kontrakan masih menggunakan meja dengan dimensi yang cukup besar. Meja makan ini tentu sangat menyita ruangan dengan keterbatasan lahan bagi kontrakan yang memiliki meja makan dengan dimensi cukup besar. Merancang produk meja makan dengan menggunakan gaya desain minimalis modern, merancang atau mendesain meja makan lipat dengan ruang terbatas. Meja Makan Lipat Minimalis Modern memberi alternatif baru dalam pengembangan desain mebel khususnya pada meja makan, mendesain sebuah produk berinovasi yang  memudahkan pengguna dalam menggunakan produk. Sehingga meja makan lipat dengan konsep minimalis modern memudahkan pengguna yang memiliki ruang yang kecil. Dengan metode  perancangan yang sudah dilakukan antaranya; pengumpulan data, analisis, alternatif desain, pengembangan desain dari alternatif terpilih, serta desain akhir. sehingga dihasilkan desain meja makan lipat yang memiliki konsep minimalis modern.
DESAIN SET CATUR UNTUK ANAK-ANAK DENGAN MOTIF BATIK KALIMANTAN TIMUR
Authors: Hidayanto Andi Farid , Wahyudi Muhammad
Published: February 2021

ABSTRACT

The design and development of chess set products into a part of the development of design in the business world, especially children's games. But the current chess sets are less varied. Generally chess set that there is only a royal and has a black and white color without any introduction of Indonesian culture, especially batik East Kalimantan. The current chess set also rarely has good storage so chess storage is not neatly arranged when the game is over. With this in mind, a designer tries to create a better item with new innovations. Like designing a chess set that is easily understood by children, designing a chess set that can introduce East Kalimantan batik culture especially Dayak Kenyah batik, and designing chess sets that have aesthetic value. In this report with the title "Set chess for children with batik motif east kalimantan" gives a new alternative in the development of furniture design especially chess sets. With the design methods that have been done include: data collection analysis, design alterrnatif, design development of selected alternatives, and final design. So produced chess set design for children who have a modern minimalist design style.

Keywords: Set, Chess, For, Children, Motif, Batik, East, Borneo
DESAIN SARANA KERJA MENJAHIT
Authors: Shyafary Darius , Mamesah Ameliya
Published: February 2021

Abstrak 

 Menjahit merupakan sebuah kerajinan tangan yang menggunakan jarum dan benang  untuk  mengikat  sesuatu  atau  menyambungkan  sesuatu,  akan  tetapi  agar kegiatan menjahit menjadi lebih mudah tentunya ada beberapa persiapan yang harus direncanakan secara matang seperti mempersiapkan peralatan menjahit secara lengkap, menyediakan sarana atau tempat membuat pola, memotong pola, menyetrika kain yang menyediakan kebutuhan penjahit dalam bekerja secara lengkap sehingga penulis ingin mendesain  “  Desain  Sarana  Kerja  Menjahit”  yang  dapat  meringankan  pekerjaan penjahit. Metode perancangan yang dilakukan yaitu dengan melakukan pengumpulan data, analisis data, menentukan konsep desain, membuat desain alternatif, mengembangkan desain alternatif, mengembangkan desain alternatif, hingga desain akhir. Untuk itu, dengan adanya “Desain Sarana Kerja Menjahit” pengguna dapat melakukan aktivitas menjahit secara mudah dengan desain yang lebih ergonomis, dan estetis yang bernuansa modern dilengkapi dengan konfigurasi yang teratur dan rapi, serta mengutamakan kenyamanan dan keamanan bagi pengguna sehingga semua dapat terakomodir dalam satu produk.

 Kata kunci : Menjahit, modern, peralatan menjahit. 

 

Abstract

 Sewing is a handicraft that uses needles and threads to tie something or connect something, but for sewing activities to be easier there must be some preparations that must be carefully planned such as preparing complete sewing equipment, providing a means or place to make patterns, cut patterns, ironing stitched fabrics, and a special table for sewing. Currently there is still no product that provides tailor needs in complete work so that the author wants to design "Sewing desing Working Facility" which can ease the tailor's work. Designing method is done by doing data, data analysis, determine the design concept, create alternative design, develop alternative design, develop alternative design, until the final design. For that purpose, with  "Sewing  Working  Facility"  users  can  easily  tailor  activities  with  a  more ergonomic design, and the aesthetically modern nuances are equipped with a neat and orderly configuration, and give priority to the comfort and safety of the users so that all can be accommodated in one product.

 Keywords: Sewing, modern, sewing equipment.
PREFERENSI MASYARAKAT KALIMANTAN TIMUR TERHADAP PEMILIHAN PRODUK FESYEN BERBAHAN ULAP DOYO
Authors: Andansari Dita , Kelewar Said
Published: February 2021

ABSTRAK

 Kerajinan Khas Kalimantan Timur adalah salah satu bidang yang mempunyai kontribusi besar bagi peningkatan perekonomian daerah. Kerajinan adalah salah satu sektor industri kreatif, dan industri kreatif di Indonesia rata-rata memberikan kontribusi PDB sebesar 6,3 persen dari total PDB Nasional dengan nilai Rp. 104,6 triliun pada tahun 2002-2006. Namun demikian belum banyak pengembangan produk yang dilakukan oleh UKM Kerajinan di Kalimantan Timur. Belum ada usaha untuk melakukan pengembangan produk yang didasarkan pada preferensi pelanggan produk kerajinan. Produk-produk kerajinan khas Kalimantan Timur ini dapat berkontribusi pada salah satu Rencana Pembangunan Jangka Menengah Daerah Kalimantan Timur yaitu pengembangan ekowisata sebagai produk oleh-oleh atau souvenir khas. Telah dilakukan penelitian sebelumnya untuk mengetahui preferensi masyarakat terhadap kain berbahan ulap doyo. Adapun hasilnya adalah bahwa masyarakat mempunyai alasan utama membeli produk fesyen dari bahan bahan ulap doyo karena unik, tradisional, merah hitam, cerah dan alami, masyarakat mempunyai alasan kedua karena nyaman dan sederhana sedangkan alasan ketiga karena alasan bagga dan alasan ke empat memilih produk karena menarik dan elegan. Belum pernah dilakukan penelitian tentang preferensi masyarakat terhadap produk fashion tas berbahan kain tenun ulap doyo. Adapun Tujuan dari penelitian adalah Mengetahui kata-kata Kansei Engineering sesuai dengan preferensi masyarakat terhadap produk fashion dari bahan ulap doyo. Metode yang digunakan adalah  Perancangan awal penelitian, Pengumpulan kansei words, Penyusunan kuisioner, Penyebaran kuisioner SD I dan Analisis statistika I. Hasil dari penelitian ini diketahui konsumen dalam memilih produk fesyen berbahan ulap doyo berdasarkan citra atau perasaan terhadap produk dipengaruhi oleh 2 faktor yang menjelaskan variansi total sebesar 64,876 % dengan perincian : Emotional appeal (bangga, modis dan elegan) dan detil desain (Indah, Nyaman, Unik dan Alami) dengan variansi sebesar 48,286 % dan Gaya Desain (Tradisional) dengan variansi sebesar 16,051 %.

 Kata kunci : pengembangan, desain produk, fesyen, Kalimantan Timur
Evaluation of the New Fluorescent Internal Tag (Soft Visible Implant Alphanumeric Tag) in the Freshwater Prawn, Macrobrachium rosenbergii
Authors: Pillai Bindu R. , Sahoo Lopamudra , Mahapatra Kanta Das , Ponzoni Raul , Sahu Sovan , Mohanty Swagatika , Sahu Swagatika , Vijaykumar S.
Published: February 2021

The new version of the polyester visible implant alphanumeric tag (VI Alpha tag; Northwest Marine Technology Inc., Shaw Island, Washington, USA) was evaluated in the giant river prawn (Macrobrachium rosenbergii) under laboratory conditions. The new VI Alpha tag is soft and fluorescent with an alphanumeric code designed to identify individual specimens. Two tag sizes - standard (1.0 x 2.5 mm) and large (1.5 x 3.5 mm) - were tested on juve- niles (standard size), subadults (standard size), and adults (large size) for 10 weeks. Retention, readability, and effects on growth and survival were evaluated. Final mean tag retention was 71.25±3.3% in juvenile prawns, 91.3%±2.73 in subadult prawns, and 59.0%±1.65 in adult prawns. Final tag readability was 100.0% in juveniles, 88.6±5.3 in subadults, and 77.8±4.8 in adults. Average daily growth (mg/day) and SGR (%/day) of tagged juvenile prawns (22.4±0.23 and 0.81±0.02, respectively) did not significantly differ (p>0.05) from that of the untagged control (20.5±1.47 and 0.83±0.04). Similar results were observed in subadult and adult M. rosenbergii. Mean final survival did not significantly differ (p>0.05) between tagged and untagged prawns. Results indicate that tagging M. rosenbergii with VI Alpha tags has no adverse effect on survival or growth and can therefore be effec- tively used to identify individuals in selective breeding programs.
Effects of Dietary Astaxanthin on Innate Immunity and Disease Resistance against Edwardsiella tarda in Olive Flounder Paralichthys olivaceus
Authors: Lee K. , Kim K. , Song J. , Kim S.
Published: February 2021

We report on the non-specific immune responses and disease resistance against Edwardsiella tarda in olive flounder fed diets supplemented by astaxanthin. Four experimental diets were formulated to be isonitrogenous (45% crude protein) and isocaloric (17.1 MJ/kg, dry matter). Astaxanthin was added to the diets at 0 (control), 1%, 2%, and 3%. Three replicate fish groups (30 fish/tank) were fed one of the experimental diets for 15 days. After 15 days, 30 healthy fish per dietary treatment were selected and injected with 1 ml E. tarda suspension to evaluate the disease resistance of the fish. Dietary supplementation of astaxanthin resulted in significantly higher non-specific immune responses than in fish fed the control diet. Cumulative mortality in the challenge test with E. tarda was significantly lower in fish fed the astaxanthin-supplemented diets than in fish fed the control diet. Results indicate that dietary supplementation of astaxanthin can enhance non-specific immune responses and disease resistance of olive flounder against E. tarda, and that a relatively short feeding period of astaxanthin can improve immunity in fish.
Vegetable Products as Dietary Pigment Sources for Juvenile Goldfish, Carassius auratus
Authors: vasagam K.P. Kumaraguru , Sivakumar V. , Jebaraja Kutty Juskar
Published: February 2021

Amaranthus leaf meal, moringa leaf meal, and red chili powder were chemically analyzed and evaluated as carotenoid sources in diets for juvenile goldfish, Carassius auratus. The fish readily accepted all test diets, indicating good palatability of the tested ingredients. In a 56-day growth trial, all growth performance indicators except survival significantly varied (p<0.05) between dietary treatments. The highest weight gain (1.19 g) was achieved by fish fed the diet containing krill meal (positive control diet), but this weight gain did not significantly differ from that of fish fed the diet containing red chili powder. Total carotenoids were significantly highest (p<0.05) in fish fed the diet containing red chili powder (2.07 μg/g) and very low in fish fed the diet containing no pigment supplement (negative control). Growth, skin coloration, and total carotenoids in the tissue were satisfactory in fish fed the diets containing amaranthus or moringa leaf meal.
Effect of Marine Red Yeast Rhodosporidium paludigenum on Antioxidant-Related Gene Expression in Litopenaeus vannamei
Authors: Jian Ji-Chang , Wu Zao-He , Yang Shi-Ping
Published: February 2021

The effects of orally-administered dry and live marine red yeast Rhodosporidium paludigenum on antioxidant-related gene expression in the hepatopancreas and hemocytes of Litopenaeus vannamei were investigated by RT-PCR. In the hepatopancreas of L. vannamei fed dry yeast, manganese superoxidate dismutase (SODMn) and catalase (CAT) were enhanced while glutathione peroxidase (GPx) and ferritin remained at the same levels as in the control group. In the hepatopancreas of L. vannamei fed live yeast, SODMn and ferritin were higher than in the control. In hemocytes of L. vannamei fed dry yeast, SODMn was lower, ferritin was similar, and CAT and GPx fluctuated, in comparison to the control. In hemocytes of L. vannamei fed live yeast, SODMn was lower, ferritin was higher, and CAT and GPx tended to be lower than in the control group. Results suggest that consumption of the marine red yeast, R. paludigenum, can stimulate antioxidant gene expression in the hepatopancreas of shrimp.
Evaluation of Crinkle Grass Rhizoclonium riparium in a Diet for Pacific White Shrimp Penaeus vannamei Post Larvae
Authors: Augusto E. Serrano Jr , Sedanza Mary Grace
Published: February 2021

A feeding experiment to evaluate the inclusion of Rhizoclonium raw meal (RM) in diets for growth and feed efficiency in Pacific white shrimp, Penaeus vannamei was conducted. Five diets were formulated containing increasing levels of RM inclusion: 0%, (control), 5.25%, 10.50%, 15.75%, and a diet with 15.75% RM totally replacing the mineral mix. The diets were fed to shrimp post larvae for 60 days with 4 replicates. Survival rates were excellent (98-93%) and similar for all treatments. Final average body weight (FABW) was highest in shrimp fed the diet containing 5.25% RM, and lowest with the 10.50% RM diet; FABW of the other groups were either statistically similar or lower than the control group. A similar pattern was also observed for specific growth rate (SGR) and protein gain (PG). Food conversion efficiency (FCE) was highest in shrimp fed the diet containing 5.25% RM; protein efficiency ratio (PER) was higher in all groups fed diets containing RM than the control group. Replacing the dietary mineral component with RM did not significantly affect the growth, feed efficiency, and survival rate. The present study demonstrated that Rhizoclonium riparium var. implexum is a possible complementary protein source and could replace from 15%-45% imported soybean meal (SBM) in the P. vannamei post larvae diet. An additional 1% RM could replace the dietary minerals.