bluuebunny/crossref_metadata_2025_split huggingface dataset:
Algoritme Migrating Birds Optimization dan Algoritme Particle Swarm Optimization: Penyelesaian Masalah Knapsack 0-1
Authors: Silalahi Bib Paruhum , Novanto Mohamad , Supriyo Prapto Tri 
Published: June 2023

Permasalahan knapsack merupakan salah satu masalah optimisasi. Masalah knapsack merupakan suatu permasalahan bagaimana memilih objek dari beberapa objek yang akan dimasukkan ke media penyimpanan dengan masing-masing objek memiliki bobot dan total bobot dari objek yang dipilih tidak boleh melebihi kapasitas media penyimpanannya, sehingga diperoleh nilai yang maksimal. Ketika objek yang dimasukkan ke dalam media penyimpanan bersifat harus dimasukkan semua atau tidak sama sekali, permasalahan ini dikenal dengan nama knapsack 0-1. Salah satu metode penyelesaian masalah knapsack 0-1 adalah dengan menggunakan metode meta-heuristic. Terdapat beberapa metode meta-heuristic seperti algoritma migrating birds optimization dan particle swarm optimization. Paper ini membahas bagaimana algoritma migrating birds optimization dan particle swarm optimization digunakan dalam menyelesaikan permasalahan knapsack 0-1. Kemudian dilakukan perbandingan kinerja kedua algoritma tersebut berdasarkan nilai fungsi tujuan untuk beberapa studi kasus. Berdasarkan hasil penelitian ini algoritme migrating birds optimization mempunyai nilai hasil fungsi objektif yang lebih baik dibandingkan dengan algoritma particle swarm optimization.Migrating Birds Optimization Algorithm and Particle Swarm Optimization Algorithm: Knapsack problem solving 0-1AbstractThe knapsack problem is one of the optimization problems. The knapsack problem is a problem of how to select objects from several objects to be inserted into the storage with each object having a weight and the total weight of the selected object must not exceed the capacity of the storage so that the maximum value is obtained. When objects that are inserted into the storage have the character of having to be included all or nothing, this problem is known as the 0-1 knapsack. One of the methods of solving the 0-1 knapsack problem is by using the meta-heuristic method. There are several meta-heuristic methods such as the migrating birds optimization algorithm and particle swarm optimization. This paper discusses how migrating birds optimization and particle swarm optimization algorithms are used to solve the 0-1 knapsack problem. Then the performance of the two algorithms is compared based on the objective function values for several case studies. Based on the results of this study, the migrating birds optimization algorithm has better objective function values than the particle swarm optimization algorithm.
Tinjauan Matematis Waktu Tundaan pada Model Covid-19 dengan Vaksinansi
Authors: Saptaningtyas Fitriana Yuli , Ahmadi Ahmadi 
Published: June 2023

Artikel ini membahas pemodelan matematika penyebaran Covid-19 dengan vaksinasi yang melibatkan waktu tundaan. Waktu tundaan merepresentasikan waktu individu mengalami penurunan kekebalan tubuh sehingga kembali rentan terhadap Covid-19 setelah sembuh. Kita tahu bahwa individu yang dinyatakan sembuh dari Covid-19 dapat terinfeksi kembali. Penelitian ini menganalisa titik ekuilibirum beserta kestabilannya, menentukan bilangan reproduksi dasar untuk melihat penyebaran penyakit, menentukan jenis bifurkasi yang muncul yang diakibatkan oleh waktu tundaan, dan melakukan simulasi numerik untuk melihat perilaku penyebaran penyakit. Di samping itu juga dilakukan kajian analitik untuk menentukan bilangan reproduksi dasar dan analisa perbandingan kestabilan lokal untuk model tanpa waktu tundaan dan dengan waktu tundaan. Hasil dari analisis terhadap model didapat dua titik ekuilibrium, yakni satu bebas penyakit dan satu endemik. Pada model dengan waktu tundaan diperoleh bahwa waktu tundaan tertentu dapat menyebabkan munculnya solusi periodik artinya akan terjadi fluktuasi banyaknya individu yang terinveksi pada periode waktu tertentu. Simulasi numerik dengan mengubah ubah parameter waktu tundaan dan tingkat vaksinasi menunjukkan pada kondisi endemik model dengan waktu tundaan akan menyebabkan lebih banyak individu yang terinveksi dari pada model tanpa waktu tundaan. Mathematical Overview of Time Delay on Covid 19 Models with VaccinationAbstractThis article discusses the mathematical modeling of the spread of Covid-19 with vaccination which involves a time delay. The time delay is represented when an individual experiences a decreased immune system so that he is declared susceptible to Covid-19 after recovering. Because we know that individuals who are declared cured of Covid-19 can be reinfected, this study analyzes the equilibrium point of the model and its stability, determines the primary reproduction number to see the spread of the disease, determines the type of bifurcation that appears due to the time delay, and performs numerical simulations. To see the behavior of the spread of the disease. In addition, analytical studies were carried out to determine the primary reproduction number and local stability comparison analysis for models without time delay and with time delay. The model analysis results obtained two equilibrium points, one free of disease and one endemic. In the time-delayed model, the value of the time-delay parameter is obtained, which causes the emergence of a periodic solution, meaning that there will be fluctuations in the number of individuals infected in a certain period. Numerical simulations by changing the time delay parameters and vaccination rates show that in endemic conditions, models with time delays will cause more individuals to be infected than models that do not use time delays.
Mutations of SARS-CoV-2 Structural Proteins in the Alpha, Beta, Gamma, and Delta Variants: Bioinformatics Analysis
Authors: Khetran Saima Rehman , Mustafa Roma 
Published: June 2023

Background
COVID-19 and Middle East Respiratory Syndrome are two pandemic respiratory diseases caused by coronavirus species. The novel disease COVID-19 caused by SARS-CoV-2 was first reported in Wuhan, Hubei Province, China, in December 2019, and became a pandemic within 2-3 months, affecting social and economic platforms worldwide. Despite the rapid development of vaccines, there have been obstacles to their distribution, including a lack of fundamental resources, poor immunization, and manual vaccine replication. Several variants of the original Wuhan strain have emerged in the last 3 years, which can pose a further challenge for control and vaccine development.

Objective
The aim of this study was to comprehensively analyze mutations in SARS-CoV-2 variants of concern (VoCs) using a bioinformatics approach toward identifying novel mutations that may be helpful in developing new vaccines by targeting these sites.

Methods
Reference sequences of the SARS-CoV-2 spike (YP_009724390) and nucleocapsid (YP_009724397) proteins were compared to retrieved sequences of isolates of four VoCs from 14 countries for mutational and evolutionary analyses. Multiple sequence alignment was performed and phylogenetic trees were constructed by the neighbor-joining method with 1000 bootstrap replicates using MEGA (version 6). Mutations in amino acid sequences were analyzed using the MultAlin online tool (version 5.4.1).

Results
Among the four VoCs, a total of 143 nonsynonymous mutations and 8 deletions were identified in the spike and nucleocapsid proteins. Multiple sequence alignment and amino acid substitution analysis revealed new mutations, including G72W, M2101I, L139F, 209-211 deletion, G212S, P199L, P67S, I292T, and substitutions with unknown amino acid replacement, reported in Egypt (MW533289), the United Kingdom (MT906649), and other regions. The variants B.1.1.7 (Alpha variant) and B.1.617.2 (Delta variant), characterized by higher transmissibility and lethality, harbored the amino acid substitutions D614G, R203K, and G204R with higher prevalence rates in most sequences. Phylogenetic analysis among the novel SARS-CoV-2 variant proteins and some previously reported β-coronavirus proteins indicated that either the evolutionary clade was weakly supported or not supported at all by the β-coronavirus species.

Conclusions
This study could contribute toward gaining a better understanding of the basic nature of SARS-CoV-2 and its four major variants. The numerous novel mutations detected could also provide a better understanding of VoCs and help in identifying suitable mutations for vaccine targets. Moreover, these data offer evidence for new types of mutations in VoCs, which will provide insight into the epidemiology of SARS-CoV-2.
Methods Used in the Development of Common Data Models for Health Data: Scoping Review
Authors: Ahmadi Najia , Zoch Michele , Kelbert Patricia , Noll Richard , Schaaf Jannik , Wolfien Markus , Sedlmayr Martin 
Published: June 2023

Background
Common data models (CDMs) are essential tools for data harmonization, which can lead to significant improvements in the health domain. CDMs unite data from disparate sources and ease collaborations across institutions, resulting in the generation of large standardized data repositories across different entities. An overview of existing CDMs and methods used to develop these data sets may assist in the development process of future models for the health domain, such as for decision support systems.

Objective
This scoping review investigates methods used in the development of CDMs for health data. We aim to provide a broad overview of approaches and guidelines that are used in the development of CDMs (ie, common data elements or common data sets) for different health domains on an international level.

Methods
This scoping review followed the PRISMA-ScR (Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews) checklist. We conducted the literature search in prominent databases, namely, PubMed, Web of Science, Science Direct, and Scopus, starting from January 2000 until March 2022. We identified and screened 1309 articles. The included articles were evaluated based on the type of adopted method, which was used in the conception, users’ needs collection, implementation, and evaluation phases of CDMs, and whether stakeholders (such as medical experts, patients’ representatives, and IT staff) were involved during the process. Moreover, the models were grouped into iterative or linear types based on the imperativeness of the stages during development.

Results
We finally identified 59 articles that fit our eligibility criteria. Of these articles, 45 specifically focused on common medical conditions, 10 focused on rare medical conditions, and the remaining 4 focused on both conditions. The development process usually involved stakeholders but in different ways (eg, working group meetings, Delphi approaches, interviews, and questionnaires). Twenty-two models followed an iterative process.

Conclusions
The included articles showed the diversity of methods used to develop a CDM in different domains of health. We highlight the need for more specialized CDM development methods in the health domain and propose a suggestive development process that might ease the development of CDMs in the health domain in the future.
Designing High-Fidelity Mobile Health for Depression in Indonesian Adolescents Using Design Science Research: Mixed Method Approaches
Authors: Shania Mila , Handayani Putu Wuri , Asih Sali 
Published: June 2023

Background
COVID-19 mitigation protocols, enacted to control the pandemic, have also been shown to have a negative impact on mental health, including the mental health of adolescents. The threat of being infected by SARS-CoV-2 and substantial changes in lifestyle, including limited social interaction due to stay-at-home orders, led to loneliness as well as depressive symptoms. However, offline psychological assistance is restricted, as psychologists are bounded by mitigation protocols. Further, not all adolescents’ guardians are open to their children attending or have the means to pay for psychological service; thus, adolescents remain untreated. Having a mobile health (mHealth) app for mental health that uses monitoring, provides social networks, and delivers psychoeducation may provide a solution, especially in countries that have limited health facilities and mental health workers.

Objective
This study aimed to design an mHealth app to help prevent and monitor depression in adolescents. The design of this mHealth app was carried out as a high-fidelity prototype.

Methods
We used a design science research (DSR) methodology with 3 iterations and 8 golden rule guidelines. The first iteration used interviews, and the second and third iterations used mixed method approaches. The DSR stages include the following: (1) identify the problem; (2) define the solution; (3) define the solution objective; (4) develop, demonstrate, and evaluate the solution; and (5) communicate the solution. This study involved students and medical experts.

Results
The first iteration resulted in a wireframe and prototype for the next iteration. The second iteration resulted in a System Usability Scale score of 67.27, indicating a good fit. In the third iteration, the system usefulness, information quality, interface quality, and overall values were 2.416, 2.341, 2.597, and 2.261, respectively, indicating a good design. Key features of this mHealth app include a mood tracker, community, activity target, and meditation, and supporting features that complement the design include education articles and early detection features.

Conclusions
Our findings provide guidance for health facilities and to design and implement future mHealth apps to help treat adolescent depression.
Unintentional Bias and Managerial Reporting
Authors: Şabac Florin , Tian Jie Joyce 
Published: June 2023

ABSTRACTWe examine the impact of unintentional biases in managerial judgment and in audited accounting information on the reporting of unverifiable private managerial information for stewardship purposes. Such biases are exogenous and irreducible; awareness of their existence does not eliminate bias or lead to heterogeneous beliefs—all agents have common, objective beliefs. We show that any biased managerial judgment in interpreting private information and negatively biased accounting (conservatism) reduce timely reporting of private managerial information by managers. Only positively biased (less conservative) accounting increases such reporting by managers. Contrary to conventional wisdom, negative accounting biases, instead of counteracting the effect of positive managerial bias, act to further reduce reporting by managers and, thus, the supply of timely information to capital markets. Thus, freedom from bias, both in managerial judgment and in accounting, more likely results in managers issuing timely reports.
Harmonized Accounting Standards and Investment Beauty Contests
Authors: Jiang Xu , Tang Chao , Zhang Gaoqing 
Published: June 2023

ABSTRACT
We study the economic impacts of adopting harmonized accounting standards when firms’ investments exhibit beauty contest features. We model harmonized accounting standards as common/correlated noises in firms’ accounting reports. We show that while more harmonized accounting standards have ambiguous effects on the reports’ informativeness in representing firms’ underlying fundamentals, they always reduce their usefulness in forecasting aggregate investments. Therefore, the stronger the beauty contest features, the more important the forecasts about the aggregate investment, thus calling for less harmonized accounting standards. We also find that, absent beauty contest features, mandatory adoption of harmonized accounting standards can be unnecessary; however, such a mandate is warranted when beauty contest features are strong as firms, when left on their own, would not voluntarily do so. Taken together, our results provide both a justification for and identification of an unintended consequence of the recent mandates toward adopting harmonized accounting standards.
JEL Classifications: M41; M48.
SIKAP KONSUMEN DAN POLA PEMBELIAN SUSU GREENFIELDS DI KOTA BANDAR LAMPUNG
Authors: Fadhilah Ghina Putri , Nugraha Adia , Adawiyah Rabiatul 
Published: June 2023

This study aims to analyze the attitude of consumers toward the purchase of Greenfields milk in Bandar Lampung City in order to investigate the purchasing pattern of Greenfields milk by consumers towards Greenfields milk. This re search was conducted at Chandra Superstore Tanjung Karang, Chamart Wayhalim, Lion Superindo Lampung, Gelael Lampung, Transmart Lampung, MM Surya Pagar Alam, and Indomaret Plus Ryacudu Korpri 2. The overlay of this research method was a survey with an accidental technique. Thus, the respondents in this study were 56 Greenfield milk consumers who had bought/consumed Greenfield’s milk at least once during their last month. Research data were analyzed using Fishbein Multi-attribute analysis and descriptive analysis. Data collection was conducted from April to Mei 2021. The results showed that the Greenfields milk consumers of Greenfields milk with the most possible attribute, namely the taste attribute. The highest amount of Greenfields milk purchased was UHT milk with full cream flavor. The average number of purchases of Greenfields milk per customer was 3.369ml per month and the average frequency of purchasing Greenfields milk is two times a month. Keywords: customer attitudes, buying patterns, and Greenfields milk.
PERILAKU KONSUMEN KERIPIK PISANG LUMER MELTE VANANA DI KOTA BANDAR LAMPUNG
Authors: Saputra Bayu , Indriani Yaktiworo , Saleh Yuliana 
Published: June 2023

This study aims to determine attitudes, satisfaction, and loyalty to purchasing Melte Vanana melted banana chips at CV Vanana Jaya Sinergi. This research is placed in Bumi Manti Street number II, LK II, Kampung Baru Village, Labuhan Ratu District, Bandar Lampung City chosen purposively. The number of samples in this study is 50 people selected by the non-probability sampling method. Research data is analyzed descriptively and qualitatively by Fishbein Multi-attribute Model, Consumer Satisfaction Index (CSI), and loyalty pyramid. Results of the research known that consumers who became respondents in this study were 44 people (88%) aged 17-25 years and the majority were male. The highest level of consumer education is senior high school, with as many as 42 people (84%). Most consumers' income or stipend (44%) is less than IDR500.000 per month. Study results indicated that the consumer attitude score for Melte Vanana melted banana chips at CV Vanana Jaya Sinergi was 188.46 in the good category. Consumer satisfaction with Melte Vanana melted banana chips at CV Vanana Jaya Sinergi was in the very satisfied criteria, with which score is 85.41. Consumers’ loyalty to Melte Vanana's melted banana chips was categorized as liking the brand (90%) at the loyalty pyramid level. Keywords: Attitude, banana chips, customer behavior, loyalty, satisfaction.
ANALISIS KINERJA, HARGA POKOK PRODUKSI DAN KEUNTUNGAN AGROINDUSTRI TAHU DI PEKON GADINGREJO KECAMATAN GADINGREJO KABUPATEN PRINGSEWU
Authors: Ningsih Surati Mei , Murniati Ktut , Yanfika Helvi 
Published: June 2023

This study aims to analyze the performance of production and cost of goods produced in the tofu agroindustry in Pekon Gadingrejo, Gadingrejo District, Pringsewu Regency. The research locations were carried out in three tofu agroindustries located in Pekon Gadingrejo, Gadingrejo District, Pringsewu Regency, which was chosen intentionally (purposively) with the consideration that the pekon in Gading Rejo District is a tofu production center in Pringsewu Regency. The respondents in this study were owners of agroindustries. The data analysis used is descriptive qualitative and quantitative. Analysis of data is cost of goods produced using full costing analysis. The results showed that the production performance in the three agro-industries of tofu in Pekon Gadingrejo, Gadingrejo District, Pringsewu Regency, based on productivity, capacity, quality, process speed, and delivery speed was good, but based on flexibility indicators, it was not yet oftimal, because there was no other products produced from the same raw materials. As a result of the calculation of the cost of goods produced, the three agro-industries know are profitable and worthy of development. The biggest advantage is in the type of tofu pong. Keywords : cost of production, production performance, tofu.
SIKAP DAN KEPUASAN KONSUMEN KOPI BUBUK GUNUNG SEKINCAU DI KECAMATAN SEKINCAU KABUPATEN LAMPUNG BARAT
Authors: Oktaviana Tifany , Haryono Dwi , Rufaidah Erlina 
Published: June 2023

This study aims to analyze consumer characteristics, consumer attitudes, and levels of consumer satisfaction on Gunung Sekincau ground coffee products. This study used a survey method through a qualitative descriptive approach with 50 samples. The analytical method uses the Fishbein Multi-attribute Model, Customer Satisfaction Index (CSI) and Importance Performance Analysis (IPA). The results showed that most of the consumers of Gunung Sekincau ground coffee were male aged 24-30 years, with more than 3 family members, working as private employees with a monthly income of more than IDR3,000,000. The results of the study using Fishbein attribute analysis show that the taste is the most important attribute for consumers. Consumer attitude towards Gunung Sekincau ground coffee is 94.5% and in the fairly good category. The level of consumer satisfaction on Gunung Sekincau ground coffee is 81.33% and included in the very satisfied category. The price attribute belonging to quadrant I is an attribute that is still considered important by consumers, but its implementation is still considered low. Quadrant II, namely maintaining achievement, shows the level of importance that is considered high by consumers in their performance is also high, which belongs to this quadrant are the attributes of taste, aroma, and texture. Quadrant III shows the level of consumer interest that is still lacking and in its implementation by producers that is still lacking, the attributes in this quadrant are considered by consumers to be unimportant and ignored, the attributes included in this quadrant is location attribute. Quadrant IV contains attributes that are considered excessive by consumers with a low level of importance and in practice by producers considered by consumers to be quite high, the attributes included in this quadrant is packaging attribute.
PEMASARAN KERIPIK PISANG KHARISMA PADA MASA PANDEMIK DI BANDAR LAMPUNG
Authors: Kasihati Endang , Kasymir Eka , Indriani Yaktiworo 
Published: June 2023

This study aimed to analyze the strengths and weaknesses of banana chips marketing in the pandemics period at Kharisma banana chips agroindustry in Bandar Lampung City. This research involved 5 respondents, namely 1 owner, 2 employees, and 2 consumers. The research data was collected in January 2022 and analyzed qualitatively and quantitatively. Qualitative analysis was conducted based on the field observations and direct interviews with business owners, production employees, sales employees, and consumers. Quantitative analysis was conducted by calculating the EFE, IFE, and IE matrices. The results showed that the internal factors in the marketing of the agroindustry of Kharisma banana chips were product, price, promotion, human resources, physical evidence, and process while external factors were competitors, consumers, technology, suppliers, and the government. The condition that occurred in the marketing of the Agroindustry during the pandemic was that the turnover was decreasing because the number of consumers was reducing due to the pandemic. Keywords: Agroindustry, Banana, Marketing, Pandemic