bluuebunny/crossref_metadata_2025 huggingface dataset:
АЛГОРИТМ ПРИЗНАНИЯ И УЧЕТА РАСХОДОВ ПО ДОГОВОРУ СТРОИТЕЛЬНОГО ПОДРЯДА
Authors: Зимакова Л.А. , Чуйко Е.А.
Published: September 2024

Вопросы признания выручки и расходов являются одними из наиболее важных при составлении финансовой отчетности, налоговых деклараций и при определении производственного результата любого экономического субъекта. Для организаций строительной отрасли они приобретают особое значение, так как осложняются отраслевыми особенностями и действующими правилами бухгалтерского учета. В статье представлен алгоритм признания и учета расходов по договору строительного подряда, включающий ряд последовательных шагов. Первый шаг (осуществляется на предварительном этапе) предполагает анализ условий сдачи работ, документального оформления и признания выручки, определяемых договором, с учетом возможных налоговых последствий и положений по бухгалтерскому учету.   Последующие шаги относятся уже к процессу выполнения строительных работ и включают мониторинг, проверку первичных документов и признанных фактов проведения работ, оценку созданных активов и незавершенного производства, анализ, сопоставление с положениями нормативных актов, создание резервов и отражение в финансовой отчетности. Последовательная реализация действий, определенных в алгоритме, даст возможность грамотно отразить информацию по договорам строительного подряда в информационной системе экономического субъекта, представить объективные данные, отвечающие потребностям заинтересованных пользователей, в отчетности.
МЕТОДИКА ИССЛЕДОВАНИЯ ПРИСУТСТВИЯ КОНКУРЕНТОВ В ПОИСКОВЫХ СИСТЕМАХ
Authors: Лежнина Т.А. , Петрова А.Н. , Яровиков А.Н.
Published: September 2024

В статье были рассмотрены методы изучения присутствия конкурентов в поисковых системах Яндекс и Google на примере кондитерской фабрики. В результате была сформирована комплексная методика по исследованию наличия конкурентов. Методика состоит  из 4 этапов: постановка целей и задач, сбор ключевых запросов, кластеризация, проверка запросов и формирование списка конкурентов. В исследовании описаны возможности сервисов для SEO (Search Engine Optimization), использованных для формирования списка конкурентов. Представленный алгоритм визуализирован в программе Miro, по каждому из методов даны подробные рекомендации и описаны шаги по его реализации. Результаты исследования были подтверждены практикой, более того доказали свою эффективность в ходе реализации изучения присутствия конкурентов в рассмотренных поисковых системах.
ОЦЕНКА ИНВЕСТИЦИОННОГО ПРОЕКТА КРУПНОГО ПРОМЫШЛЕННОГО ПРЕДПРИЯТИЯ
Authors: Лудушкина Е.Н.
Published: September 2024

В статье рассматривается проблема обновления основных средств крупного промышленного предприятия, расположенного на территории Нижегородской области. При анализе основных средств промышленного предприятия, выяснилось, что большая часть оборудования изношено, а срок полезного использования подходит к концу.  Поэтому перед руководством стоит задача обновления оборудования, для недопущения остановки работы предприятия. В статье представлен инвестиционный проект по модернизации оборудования проведен анализ окупаемости проекта. В результате проведенного анализа основных средств предприятия, было выявлено, что достаточно большая часть оборудования изношено, а также у большей части оборудования подход к концу срок полезного использования. Перед предприятием стоит выбор способа обновления основных средств, предпочтительным оказался кредит в банке ВТБ, в объеме чуть более 30 процентов, от общей стоимости оборудования. Основными методами написании статьи послужили: методы экономического анализа основных средств предприятия, методы инвестиционной оценки проекта по покупке оборудования. Поскольку обновление оборудования, очень острый вопрос, то в статье нашли отражение, такие аспекты, как обновление основных фондов (принятие непосредственно управленческого решения), выбор оборудования, которое необходимо обновить, способ финансирования покупки нового оборудования.
О ПРОБЛЕМАТИКЕ НОРМАТИВНОГО РЕГУЛИРОВАНИЯ ФОРМИРОВАНИЯ И АУДИТА БУХГАЛТЕРСКОЙ (ФИНАНСОВОЙ) ОТЧЕТНОСТИ
Authors: Морунов В.В. , Мустафин А.М. , Мазитов Р.И.
Published: September 2024

В статье рассмотрены вопросы нормативного регулирования формирования и аудита бухгалтерской (финансовой) отчетности с учетом влияния ESG-факторов и основных рисков и возможностей, связанных с воздействием таких факторов
"Super App Precision" Sebagai Bentuk Pelayanan Publik di Era Masyarakat 5.0
Authors: Sumirat Jauhar Rizqullah , Syahputra Alfin Reza
Published: September 2024

Revolusi industri keempat telah mengubah cara hidup manusia. Penelitian ini mengeksplorasi Super App Precision. Satuan kerja dan teritorial Polri membuat 25 aplikasi internet yang unik sebelum bergabung menjadi satu. Temuan menunjukkan bahwa petugas kepolisian di Baintelkam belum dapat menyesuaikan diri dengan keterhubungan layanan SKCK, data yang terkait dengan keamanan data, atau legitimasi otoritas lokal. Selain itu, salah satu kendala dalam penerapan Super App adalah belum dikembangkannya SIM Online secara nasional, belum adanya fasilitas moderasi, dan akses yang perlu dialokasikan secara merata dari sisi kesiapan personel. Terkait dengan sistem back-office dari pusat ke polres untuk membantu operasional dan digitalisasi layanan kepolisian di Super App Precision, hanya Divisi Teknologi Informasi, Baharkam, dan Bareskrim yang sudah siap dengan layanan data Pos Polisi dan panggilan darurat di Super App Precision.
Aplikasi Administrasi Pembayaran Sumbangan Pembinaan Pendidikan (SPP) Berbasis Progressive Web Apps (Studi Kasus: SMA Taman Mulia Kubu Raya)
Authors: Adhariah Sitty
Published: September 2024

Kurang optimalnya proses pengelolaan administrasi pembayaran Sumbangan Pembinaan Pendidikan (SPP) yang masih dikerjakan secara konvensional di beberapa sekolah saat ini menimbulkan beberapa permasalahan seperti kesalahan dalam perhitungan, kesalahan data yang tidak tercatat serta kurangnya informasi untuk orang tua terkait pembayaran SPP yang telah dilakukan. Tujuan dari penelitian ini adalah membangun dan merancang sebuah aplikasi administrasi pembayaran Sumbangan Pembinaan Pendidikan (SPP) yang dapat mengoptimalkan administrasi pembayaran SPP menjadi lebih efektif dan efisien yang didukung dengan teknologi informasi berbasis Progressive Web Apps yang dapat diakses dan ditampilkan dengan baik di berbagai perangkat seperti desktop maupun mobile, dilengkapi juga dengan SMS Gateway sebagai notifikasi pembayaran yang bertujuan untuk membuka jembatan komunikasi antara pihak sekolah dengan orang tua siswa terkait dengan pembayaran SPP yang telah berhasil dilakukan. Perancangan sistem ini menggunakan Unified Modelling Language (UML). Pengujian aplikasi dalam penelitian ini menggunakan UAT (User Acceptance Test).Kata kunci: Aplikasi Administrasi, Pembayaran SPP, User Acceptance Test , Progressive Web Apps
Palembang City Web-Based Futsal Field Rental System Using Express JS and React JS
Authors: Apriansyah Apriansyah
Published: September 2024

Futsal is one of the most popular sports for almost all ages in the city of Palembang. At this time the process of ordering the futsal field is still being carried out through prospective tenants having to come directly to the field provider's place which can take time and get invalid information regarding the field to be ordered, so there is a need for a system that can provide information and manage futsal field data to get what is expected. In the current era of digitalization, the ease of obtaining information greatly affects performance in any field, therefore in this study, the authors built a system that can facilitate ordering and rental of Web-based Futsal Fields in Palembang City using Express JS and React JS. This system was developed using the prototype method, prototype is an approach in developing software or systems with several steps in this method, namely identifying user needs, designing prototypes based on needs, building prototypes, evaluating tests, refining and iteration, and developing final products.
Quality Analysis of JAKLITERA Website with Webqual 4.0 Method and Importance-Performance Analysis
Authors: Abilawa Rakai , Nurmawati Erna
Published: September 2024

Public libraries must develop a library service system based on information and communication technology. In an effort to realize this, the Jakarta Library launched the JAKLITERA website which is an integrated library website to facilitate borrowing library collections anywhere and anytime. To achieve this goal, it is necessary to pay attention to the quality of the website, because it will be a reflection of the library's services. Good website quality will have an impact on user satisfaction in visiting the website. To measure, the right method is needed according to the purpose of assessing website quality. Webqual 4.0 method is considered appropriate to use because basically the quality measurement technique with this method takes user perception as a basis. The analysis used to determine indicators/attributes that need to be improved or have met user expectations and website quality is IPA and gap analysis, while the CFA method will be used to see indicators that contribute less. Based on the results of gap analysis and IPA, there are 21 indicators with negative values and 4 indicators that are prioritized for improvement, while the CFA results show that there is 1 indicator that is categorized as less contributing to the JAKLITERA website.
Tinjauan Kesejahteraan di Daerah Perbatasan Republik Indonesia Tahun 2021: Penerapan Analisis Klaster K-Means dan Hierarki
Authors: Az-Zahra Afifah , Wijayanto Arie Wahyu
Published: September 2024

Kesejahteraan menjadi salah satu tujuan utama pemerintahan yang perlu ditinjau secara multidimensi. Di Indonesia, program-program pembangunan banyak menyasar Daerah Terdepan, Terluar, dan Tertinggal (3T). Daerah terdepan dan terluar merupakan daerah yang berada di garis perbatasan negara dengan banyak ancaman terhadap kesejahteraan. Oleh karena itu, diperlukan analisis klaster sebagai gambaran kesejahteraan di daerah perbatasan, yang diharapkan dapat membantu proses monitoring dan evaluasi program pembangunan. Indikator-indikator kesejahteraan yang digunakan bersumber dari publikasi Statistik Kesejahteraan Rakyat 2021, tabel Badan Pusat Statistik, Buku Saku Hasil Suvei Status Gizi Indonesia 2021, dan tabel FSVA Nasional 2021 di 204 kabupaten/kota di 13 provinsi perbatasan. Penelitian ini membandingkan dua metode analisis klaster, yaitu partitioning dengan K-Means dan hierarki dengan Ward’s Method berdasarkan kriteria validitas internal dan stabilitas klaster. Hasilnya diperoleh bahwa ukuran sampel 2 memberikan klaster paling yang optimal dan metode K-Means menghasilkan kinerja yang lebih baik. Secara umum, kabupaten/kota yang tergabung ke dalam klaster kedua memiliki indikator kesejahteraan yang lebih tinggi dibandingkan klaster pertama.
Aplikasi Pengamanan Dokumen Digital Perusahaan Berbasis Android Menggunakan Algoritma AES-256
Authors: Ayu Tasya Diah , Asriningtias Yuli
Published: September 2024

Advanced Encryption Standard (AES) merupakan algoritma kriptografi yang dapat digunakan untuk mengamankan data. Algoritma Advanced Encryption Standard (AES) adalah blok chipertext simetrik yang dapat mengenkripsi (encipher) dan dekripsi (decipher) informasi. Teknik pengumpulan data merupakan langkah yang paling strategis dalam sebuah penelitian. Dengan menggunakan teknik pengumpulan data yang benar maka peneliti akan mendapatkan data-data yang memenuhi standar, maka dilakukan teknik pengumpulan data yaitu, studi dokumen. Penelitian ini menghasilkan sebuah sistem aplikasi android untuk pengamanan dokumen digital perusahaan dengan memanfaatkan AES-256 sebagai algoritma kriptografinya. Aplikasi yang dihasilkan dirancang dengan menggunakan framework Node js berbasis bahasa pemrograman javascript pada sisi backendnya, sedangkan pada sisi frontendnya menggunakan bahasa pemrograman kotlin yang dibuild menggunakan IDE (Integrated Development Environment) android studio. Database yang digunakan pada aplikasi ini adalah dengan menggunakan MySql. Proses enkripsi data dokumen digital menggunakan algoritma AES-256 dilakukan pada bagian backend dengan memanfaatkan library pada Node js yaitu yaitu Node.js Crypto Module. Data dokumen yang sudah berhasil dienkripsi, disimpan di dalam database MySql. Aplikasi yang dihasilkan menggunakan API(Application Programming Interface) sebagai perantara komunikasi antara bagian client dengan bagian server. Berdasarkan hasil penelitian ini dapat disimpulkan bahwa telah terciptanya aplikasi pengamanan dokumen digital perusahaan dengan menggunakan algoritma AES-256. Aplikasi tersebut telah berhasil mengamankan dengan baik file dokumen digital perusahaan yang berfomat docx, pdf, csv/xlxs, png/jpg. File dokumen yang berhasil dienkripsi berhasil tidak dapat dibuka kecuali dengan menggunakan aplikasi ini berdasarkan kunci dan token yang sesuai.
Sentiment on Public Trust Using the NLP Rule Based Method
Authors: Sipayung Evasaria Magdalena
Published: September 2024

Government policy is understood from suggestions that will be achieved or regulated where the target is the public in the sense of society and the public interest, then government policy can be categorized as public policy. The policies implemented by the Government in 2022 include the stages of eliminating Premium and Pertalite fuel oil, increasing the price of non-subsidized LPG gas, the application of BPJS standard classes, and fishing is limited through a quota system. In this research, government policy sentiment analysis was carried out using the NLP (Natural Language Processing) method on tweet data. There are three policies that serve as a reference for public trust, namely the "Pertalite Increase", "BPJS Class" and "Non-Subsidized LPG" policies. The most negative sentiment was obtained during the "Increase in Pertalite" policy where there were 73.4% of negative tweets criticizing the government. The "BPJS Class" policy also received negative sentiment with the presentation of negative tweets of 43.4% complaining about the new policy of increasing BPJS class prices and the BPJS flow process. However, for the “Non-Subsidized LPG” policy, the results of the sentiment analysis showed that 52.9% of tweets agreed with the policy even with very good association words. The social media phenomenon is called a "buzzer" because 35% of positive tweets come from accounts whose credibility is questionable. The sentiment analysis model has shown that the model is very good with an accuracy of 86.3% which can represent that the events depicted in the Twitter social media data are in accordance with the reality that occurred.
Pengembangan Sistem Manajemen Rencana Strategis Studi Kasus Yayasan SATUNAMA Yogyakarta
Authors: Tandirilambun Tandirilambun , Rini Maria Nila Anggia , Filiana Agata , Virginia Gloria
Published: September 2024

Pada penelitian ini dibangun sebuh system menggunakan incremental model sebanyak tiga kali inkremen. Pendekatan incremental model dianggap cocok untuk pembangunan sistem rencana strategis di Yayasan SATUNAMA karena perangkat lunak yang dikembangkan dapan diproduksi lebih awal. TErdapat dua pengujian yang dilakukan pada sistem rencana strategis yang dibangun yaitu menggunakan black box testing dan User Acceptance Test (UAT). Black box testing dilakukan pada setiap akhir inkremen untuk menguji fungsionalitas dan memastikan bahwa sistem berjalan dengan semestinya. User Acceptance Test dilakukan setelah sistem sudah selesai dikembangkan secara utuh dan diujikan kepada 2 responden di Yayasan SATUNAMA yang nantinya akan mengakses sistem ini. Hasil dari User Acceptance Test menunjukkan ada hasil yang positif dan memberikan manfaat bagi pengguna dalam mengelola rencana strategis secara terstruktur.
APLIKASI RESERVASI ONLINE PENYEDIA MAKAN MINUM BERBASIS PROGRESSIVE WEB APPS
Authors: Andreas Ricky , Ripanti Eva Faja , Nyoto Rudy Dwi
Published: September 2024

Proses reservasi yang mencakup identifikasi reservasi, penanganan pembayaran, dan penyediaan informasi yang ketika dalam pengelolaannya menyulitkan maka akan menimbulkan permasalahan dari berbagai aspek seperti aspek identifikasi reservasi yang sulit karena masih berlangsung secara manual, penanganan pembayaran yang masih bersifat terpisah, ataupun penyediaan informasi yang masih terbatas. Oleh karenanya, dalam penelitian ini dibangunlah sebuah aplikasi reservasi online penyedia makan minum berbasis Progressive Web Apps (PWA) yang bertujuan membantu pengelolaan reservasi yang mencakup identifikasi reservasi, penanganan pembayaran, dan penyediaan informasi. Aplikasi sebagai marketplace yang menghubungkan antara penyedia jasa sebagai penjual dan konsumen sebagai pembeli yang memungkinkan transaksi layaknya sebuah pasar. Aplikasi dibangun menggunakan metode Rapid Application Development (RAD) yang setiap iterasinya direkam menggunakan Prototype Evaluation Form (PEF), diuji menggunakan metode blackbox dan User Acceptance Testing (UAT). Setelah melalui serangkaian uji blackbox, aplikasi berhasil menunjukkan konsistensi dalam menjalankan fungsi sesuai dengan perancangan awal. Dalam uji coba UAT, penilaian dari pemilik, penyedia jasa, dan pelanggan mendapat nilai akhir sebesar 84% yang mengindikasikan keberhasilan pencapaian dalam kriteria penilaian yang telah ditetapkan.
Effectiveness of Using Mit App Inventor at STKIP Taman Siswa Bima
Authors: Putri Meirizka Hani , Jannah Miftahul , Fitriati Ita , Ridwan Ridwan
Published: September 2024

Effectiveness of Using Mit App Inventor at STKIP Taman Siswa Bima Media learning must be a bridge between teachers and students so that the learning process can run well and the transfer of knowledge carried out by teachers can be conveyed well. In order for the process of teaching and learning activities to be more effective, learning media is needed as a supporting tool. A physical medium, such as a book, movie, video, etc., is referred to as learning media. In the early history of learning, media was only a tool used by someone to provide explanations about material, learning media can also increase their motivation to learn, and clarify and simplify learning concepts. Choosing learning media is very important because learning media must be appropriate to the conditions and level of students' understanding. Conventional learning media will make students bored with lessons, especially if in class learning only focuses on teachers and books, therefore the learning process that is carried out must be up-to-date and provide good results, that's the kind of learning media that should be used. . The research method used in this research is Quantitative Descriptive. Data collection was carried out by distributing questionnaires to students of the STKIP Taman Siswa information technology education study program. The results of this research indicate that the use of Mit App Inventor in the information technology education study program is effective. The first indicator, namely "Platform Quality" gets a percentage of 75% in the "Effective" category, the second indicator "Student Understanding" gets a percentage of 78% in the "Effective" category, the third indicator "Student Preferences" gets a percentage of 73% in the "Effective" category” and the fourth indicator “Benefits obtained” got a percentage of 79% in the “Effective” category. It can be said that Mit App Inventor has good quality, is easy to understand, can provide good benefits to the learning process and is suitable for use as a learning medium in information technology education study programs.
Peningkatan Kinerja K-Nearest Neighbor menggunakan Bagging pada Permasalahan Ragam Kelas terhadap Pemeliharaan Prediktif Permesinan
Authors: Arisani Muhammad Irfan , Muljono Muljono
Published: September 2024

Dalam beberapa dekade terakhir, aplikasi pembelajaran mesin menjadi sangat diminati dalam menyelesaikan permasalahan tertentu. Bidang ini memberikan andil dalam menawarkan solusi terhadap banyak disiplin ilmu yang berkaitan dengan masalah klasifikasi atau prediksi. Salah satu dari sekian banyaknya algoritma pembelajaran mesin, K-nearest Neighbor masih menjadi algoritma favorit yang relevan untuk saat ini. Banyak dari penelitian terdahulu berlomba-lomba untuk mengoptimalkan algoritma KNN dan studi ini juga terinspirasi akan hal itu. Sehingga, studi ini akan berfokus pada upaya peningkatan algoritma KNN dalam penyelesaian permasalahan ragam kelas pada dataset. Lebih lanjut, adopsi metode bagging akan dipadukan dengan algoritma terkait dalam membantu mengklasifikasikan ragam tipe kerusakan mesin pada dataset permesinan. Adapun sebelum proses pemodelan berlanjut, metode yang diusulkan juga menerapkan beberapa metode klasik terlebih dahulu layaknya normalisasi dan tuning grid-search. Selanjutnya, studi ini juga akan menyajikan tentang perbandingan model dengan atau tanpa metode bagging, akurasi, precision, dan recall sebagai bagian dari matriks evaluasi. Hasil akhir eksperimen akan disajikan melalui beberapa matriks dengan menunjukkan akurasi sebesar 95.68%, rata-rata makro precision sebesar 96.28%, dan rata-rata makro recall sebesar 94.07%.
Rancang Bangun Firewall Router Mikrotik Berbasis Data Plugin Wordfence
Authors: Wicahyanto Arif
Published: September 2024

Pengguna CMS (Content Management System) Wordpress menghadapi berbagai macam serangan siber. Selain risiko keamanan data, serangan siber yang berulang dan terus menerus menghabiskan sumber daya komputasi. Penambahan firewall pada perangkat router menjadi salah satu upaya pengamanan server dari serangan siber dengan cara memblokir alamat IP penyerang. Pengelola jaringan atau server memperoleh alamat IP penyerang  dengan cara mengakses halaman plugin Wordfence yang telah terinstall pada Wordpress. Proses tersebut membutuhkan waktu dan sumber daya manusia. Penelitian ini bertujuan untuk merancang dan membangun sistem pemblokiran otomatis pada firewall router Mikrotik dengan menggunakan data alamat IP penyerang dari plugin Wordfence.
Prediksi Pasien Pusat Kesehatan Masyarakat Menggunakan Machine Learning
Authors: Purwati Neni , Pramujati Windya Harieska , Syakur Syakur , Safitri Egi
Published: September 2024

The fluctuating nature of patient visits makes it difficult for hospital management to plan, so it is important to predict patient visits by community health centers (PusKesMas) based on gender. The purpose of this study is to predict whether patients who come for treatment at the community health center can be served immediately, the supply/stock of drugs can meet the needs of patients and the availability of sufficient medical equipment, so that community health center services improve for the better. Based on good performance in solving the problems that have been formulated, the methods used are Random Forest (RF) and Extreme Gradient Boosting (XGBoost). The programming language used is Python using Google Colab. The stage of separating tain and test data using the scikit-learn train_test_split module with a percentage of 70% for train data and 30% for test data produces an accuracy in RF of 0.69 while in XGBoost it is 0.93. The results of the confusion matrix from XGBoost are true positive (TP), namely data that is predicted correctly and precisely as much as 53, false negative (FN) worth 3, false positive (FP) worth 2 and 1, true negative (TN) worth 40, 4, 1, 46. Meanwhile, the results of the XGBoost classification report model from the weighted Average precision value of 0.93, the recall value of 0.93 and the F1-Score value is also 0.93. These results indicate that the model used has good quality performance, so it is worthy of use. The application carried out is with the XGBoost data classification to assess patient visits in the next 5 years, with a prediction of achieving 93% accuracy.
Analisis Kinerja Algoritma Klasifikasi Naïve Bayes Menggunakan Genetic Algorithm dan Bagging untuk Data Publik Risiko Transaksi Kartu Kredit
Authors: Agustriya Manda , Ula Munirul , - Kurniawati
Published: September 2024

Peningkatan penggunaan kartu kredit telah meningkatkan risiko penipuan dan kejahatan terkait transaksi kartu kredit. Hal ini memerlukan pengembangan metode yang efektif dalam mendeteksi dan mengklasifikasikan risiko tersebut secara akurat. Tujuan penelitian ini adalah untuk membandingkan tingkat akurasi algoritma naive bayes setelah memeriksa kinerjanya dengan menggunakan metode bagging dan genetic algorithm. Meskipun naïve bayes dikenal karena kesederhanaan dan kecepatan pemrosesannya, penelitian ini mengeksplorasi potensi peningkatan akurasi dengan menggabungkan teknik analisis tersebut. Penelitian ini melibatkan serangkaian eksperimen yang dirancang untuk menguji efektivitas genetic algorithm dan teknik bagging dalam meningkatkan performa naïve bayes. Genetic algorithm, dengan kemampuan optimasinya, digunakan untuk menemukan kombinasi parameter terbaik yang dapat meningkatkan akurasi naïve bayes. Di sisi lain, teknik bagging  diterapkan untuk mengurangi varian dan meningkatkan stabilitas prediksi. Hasil penelitian menunjukkan bahwa penggunaan genetic algorithm berhasil meningkatkan akurasi naive bayes dari 99.44% menjadi 99.90%, menunjukkan peningkatan sebesar 0.46%. Sementara itu, teknik bagging tidak memberikan peningkatan yang signifikan dalam akurasi. Implikasi dari temuan ini adalah bahwa teknik analisis seperti genetic algorithm dapat secara efektif meningkatkan performa algoritma klasifikasi, terutama dalam konteks mendeteksi penipuan transaksi kartu kredit. Temuan ini memberikan wawasan penting bagi industri keuangan dalam mengembangkan sistem keamanan yang lebih baik dan efisien untuk melindungi transaksi kartu kredit dari risiko penipuan.
A radical-polar crossover approach to complex nitrogen heterocycles via the triplet state
Authors: Lockhart Zachariah , Popescu Mihai , Alegre-Requena Juan , Ahuja Jay , Paton Robert , Smith Martin , Chai Shaokang
Published: September 2024

The transition from radical to ionic reactivity is a key design feature of many photochemical reactions, enabling complex transformations not possible under either mechanistic regime alone. Ground state alkenes are common substrates in existing methods of this type, serving as radical acceptors to generate open-shell intermediates from which the radical–polar crossover (RPC) event is oxidatively or reductively triggered by a photocatalyst. Here, we describe an alternative RPC mechanism proceeding via an alkene triplet diradical. In this transformation, an iodine radical liberated during a homolytic aromatic substitution step functions as a single electron oxidant to generate an iminium electrophile that can be intercepted en route to complex natural product-like amines. An enantioselective variant of the reaction, enabled by an oxidatively installed sulfinyl leaving group, points to the generality of this underdeveloped pattern of diradical reactivity, paving the way to other triplet-state reactions that incorporate both one and two electron bond-forming processes.
Carbon Capture from Natural Gas Flue Emissions and Air via (Bi)Carbonate Formation in a Cyclodextrin-Based Metal-Organic Framework
Authors: Lim S. Alexandra , Zick Mary , Kim Jaehwan , Rhodes Benjamin , Pitt Tristan , Jerozal Ronald , Forse Alexander , Milner Phillip
Published: September 2024

Carbon capture and utilization or sequestration (CCUS) from industrial point sources and direct air capture (DAC) are both necessary to curb the rising atmospheric levels of CO2. Amine scrubbers, the current leading carbon capture technology, suf-fer from poor oxidative and thermal stability, limiting their long-term cycling stability under oxygen-rich streams such as air and the emissions from natural gas combined cycle (NGCC) power plants. Herein, we demonstrate that the hydroxide-based cyclodextrin metal-organic framework (CD-MOF) Rb2CO3 CD-MOF ST possesses high CO2 capacities from dry dilute streams at low temperatures and humid streams at elevated temperatures. Additionally, it displays good thermal, oxidative, and cycling stabilities and selective CO2 capture under mixed gas conditions in dynamic breakthrough experiments. Unex-pectedly, under dry, hot conditions, a shift in the CO2 adsorption mechanism—from reversibly formed bicarbonate to irre-versibly formed carbonate—is observed, as supported by gas sorption and spectroscopic studies. This mechanistic switch, akin to urea formation in amine-functionalized sorbents, has not been previously reported in a hydroxide-based material and sheds new light on the interplay between bicarbonate and carbonate species during CO2 capture. Our findings provide valuable insight for the design of next-generation materials containing oxygen-based nucleophiles for carbon capture appli-cations.
Structural analysis of four cyclic antimicrobial hexapeptides in aqueous solution and in micelles, towards membrane-mimicking nanodiscs
Authors: Rylandsholm Fredrik G. , Rainsford Philip , Krupova Monika , Kristoffersen Tone , Haugen Tonje , Brandsdal Bjørn Olav , Svendsen John Sigurd , Isaksson Johan
Published: September 2024

Cationic, antimicrobial peptides (AMPs) are abundantly present in nature as host-defensive peptides, forming the backbone of the natural defence of many organisms. Their primary interaction with bacterial membranes is thought to be a binding to the outer layer, followed by a disruption of the lipid membrane. Investigating the mode-of-action of AMPs is an ever-growing field, where a plethora of different biophysical experiments are used to investigate this. Here, we explore the experimental limitation in NMR spectroscopy as we migrate towards increasingly realistic but larger membrane model systems with the aim to scout which data we could realistically extract from AMPs interacting with self-aligning nanodiscs. A set of cyclic hexapeptides were used as model compounds, in water, DMSO, and SDS micelles. The quality of isotropic and anisotropic NMR parameters decreased as the result of faster relaxation due to size and dynamics, as well as the need for water suppression and buffer salts. Chemical shifts, scalar couplings, NOE derived distances, and simulated annealing suggested that the backbone conformation of both peptides remained mostly rigid, forming two β-turns, while the sidechains remain flexible in all environments. The difference between Lys or Arg did not change the backbone conformation, even though the two peptides have different MIC concentrations, indicating that amino acid composition is more important than conformation for antimicrobial activity. Theoretical structures in an explicit lipid bilayer were simulated showing similar structures. Pilot experiments on SMA-QA nanodiscs indicated that they are viable as membrane model for investigating the interaction between AMPs and lipid membranes. It was shown that signal can be obtained from bound peptide, but further investigations with isotopically labelled peptides are needed to extract relevant structural data under conditions where the nanodisc is not over-saturated by peptides.
Toward zero-excess lithium sulfur batteries: a systematic coin cell parameter study
Authors: Cruddos Josh , Robinson James , Shearing Paul , Rettie Alexander
Published: September 2024

Zero-excess lithium (ZEL) or "anode-free" batteries aim to minimise negative electrode material while addressing the challenges associated with handling thin Li metal foils during fabrication. To date, most studies have focused on Li-ion chemistry, with considerably fewer systematic investigations into ZEL-sulfur (ZELiS) cell fabrication and optimization. Here we develop a ZELiS battery, comprising a Li2S-based composite positive electrode on carbon paper paired with a Ni foil current collector and evaluate the effects of various current collector materials, electrolyte volume to Li2S mass ratio and C-rate. The developed cells reproducibly achieve an average Coulombic efficiency of 99% from cycles 2 to 200, and a final capacity of 272 mAh g-1Li2S at a C/10 rate. Furthermore, we employ X-ray computed tomography to elucidate the morphological changes and degradation processes occurring within the positive electrode composite, revealing the irreversible loss of Li2S/S8 during cycling, which is exacerbated at high rates. These results should be useful in the development of commercially viable ZEL energy storage devices.
Transfection of Macrophages with PAMAM-Pyrrolidone Dendrimers Complexed with Cu(II)- or Zn(II)- ions as Carriers of Genetic Material.
Authors: Janaszewska Anna , Marcinkowska Monika , Tarach Piotr , Debicka Julia , Klajnert-Maculewicz Barbara , Christensen Jørn Bolstad
Published: September 2024

Zn(II) and Cu(II) complexes of a generation 4 DAB-core PAMAM dendrimer with 5-methoxycarbonyl-2-pyrrolidinone (Pyrr) surface groups were prepared and investigated as carriers for siRNA in different cell lines. The Cu(II) complex (CuSO4)18@DAB-dendr-(Pyrr)64 is significantly better than lipofectamine for transfection of macrophages, while the Zn(II) complex only show low transfection activity. Both complexes are more cytotoxic than the free metal ions.
Heterogenous Perfluorooctanoic Acid Degradation with Molecular Copper Electrocatalyst
Authors: Tiwari Pramod , Sinha Soumalya , Jiang Jianbing
Published: September 2024

The increasing emission of chemically resistant perfluorinated compounds (PFCs) into the natural environment, along with their global presence in natural and treated waters and in both human and animal organisms, presents a significant environmental challenge. A cost-effective method for the successful degradation of perfluorooctanoic acid (PFOA) in aqueous solutions is crucial. Electrochemical oxidation has been demonstrated to uniquely degrade PFOA. In this study, we present a molecular copper (I) complex, [CuT2]•ClO4, in a heterogeneous aqueous system capable of degrading PFOA by up to 84% with a defluorination rate of 91% through anodic oxidation using controlled current electrolysis (CCE). Furthermore, we utilized ESI/MS to identify the degradation products from the electrochemical oxidation of PFOA. The shortening of the PFOA chain results in reduced toxicity due to decreased persistence. Thus, the findings of this study show that the [CuT2]•ClO4 complex is an efficient catalyst for the degradation and defluorination of PFOA.
Unraveling the Mechanistic Insights of Electrochemical PFAS Substrate Degradation
Authors: Chaturvedi Ashwin , Tiwari Pramod , Sinha Soumalya , Jiang Jianbing
Published: September 2024

Electrochemical per- and polyfluoroalkyl substances (PFAS) degradation is a promising and sustainable approach for the removal of persistent organic pollutants from aqueous environments. The use of molecular catalyst in degrading PFAS electrochemically has been rarely explored. Herein, we used a molecular Cu(I) electrocatalyst bearing triazole based ligands, [CuT2]•ClO4, that could cleave the C−F bonds under mild conditions. This work demonstrated the applicability to different PFAS substrates with variable chain lengths and different backbones by studying their behavior under controlled-current electrolysis. Additionally, we used mass spectrometry to identify the possible electrochemical degradation products. To get some kinetic insights, the [CuT2]+-PFAS interaction was studied using cyclic voltammetry and showed a slow e– transfer event with [CuT2]+ and PFAS binding. Moreover, it was observed that that the rate-limiting step is independent of the -CF2- functionalities present in the PFAS backbones. The electrochemical degradation of PFAS can offer potential for scalability and adaptability in wastewater treatment systems.
Electrophilic Halogenation of Allenoates and 3-Alkynoates: Syn-thesis of 1,4-Dicarbonyl 3-(E)-Haloalkenes and Mechanistic Investigations
Authors: Jamwal Paru , Nganthoinganbi Yumnam , Tsai Ming-Kang , Gurubrahamam Ramani
Published: September 2024

Herein, an electrophilic halogenation of di- or trisubstituted allenoates and 3-alkynoates is demonstrated with NBS and NIS reagents under DABCO catalysis. The protocol affords densely functionalized 1,4-dicarbonyl 3-haloalkenes in good yields with excellent (E)-stereoselectivity (up to 83% yield, >20:1 dr). The role of the Brønsted base in the unusual transformation is demystified through control experiments and computational studies. The deliverables are identified as good synthons for various synthetic transformations and valuable targets for biologically active pyridazine scaffolds.
MORE-Q, Dataset for molecular olfactorial receptor engineering by quantum mechanics
Authors: Chen Li , Medrano Sandonas Leonardo Rafael , Traber Philipp , Dianat Arezoo , Tverdokhleb Nina , Hurevich Mattan , Yitzchaik Shlomo , Gutierrez Rafael , Croy Alexander , Cuniberti Gianaurelio
Published: September 2024

We introduce the MORE-Q dataset, a quantum-mechanical (QM) dataset encompassing the structural and electronic data of non-covalent molecular sensors formed by combining 18 mucin-derived olfactorial receptors with 102 body odor volatilome (BOV) molecules. To have a better understanding of their intra- and inter-molecular interactions, we have performed accurate QM calculations in different stages of the sensor design and, accordingly, MORE-Q splits into three subsets: i) MORE-Q-G1: QM data of $18$ receptors and $102$ BOV molecules, ii) MORE-Q-G2: QM data of 23,838 BOV-receptor configurations, and iii) MORE-Q-G3: QM data of 1,836 BOV-receptor-graphene systems. Each subset involves geometries optimized using GFN2-xTB with D4 dispersion correction and up to 39 physicochemical properties, including global and local properties as well as binding features, all computed at the tightly converged PBE+D3 level of theory. By addressing BOV-receptor-graphene systems from a QM perspective, MORE-Q can serve as a benchmark dataset for state-of-the-art machine learning methods developed to predict binding features. This, in turn, can provide valuable insights for developing the next-generation mucin-derived olfactory receptor sensing devices.
GEOGRAFIA E PATRIMÔNIO URBANO: QUESTÃO METODOLÓGICA
Authors: Capuano Scarlato Francisco , Batista da Costa Everaldo
Published: September 2024

É reconhecida, nas últimas décadas, a crescente do número de geógrafos envolvidos em estudos sobre o patrimônio cultural, especialmente aquele referente às cidades: o patrimônio urbano. Nesse contexto, a análise ora apresentada assenta-se em duas questões: na inquirição geográfica sobre os aglomerados da vida e na justificativa para a relação entre patrimônio e totalidade em Geografia. Tais apontamentos auxiliarão na reflexão sobre uma possibilidade analítica do patrimônio urbano neste campo do saber, que é a de ultrapassar a dimensão do bem em si e dialogar com a noção de totalidade nos estudos patrimoniais, objetivo maior deste estudo.
METROPOLIZAÇÃO, PATRIMONIALIZAÇÃO E POTENCIAIS DE CONFLITOS SOCIOTERRITORIAIS EM BRASÍLIA (DF)
Authors: Batista da Costa Everaldo , Silveira Bruna , Severo Denise , Araújo Elton , Beserra Francisco , Carmo Tiago
Published: September 2024

No contexto de formação, transformação e representação da metrópole terciária Brasília, no Distrito Federal brasileiro, o Plano Piloto (projeto urbanístico do arquiteto Lúcio Costa, de 1957) constitui-se em símbolo da ideologia espacial que consagrou o Estado-nacional: perspectiva da ocupação de um interior a ser civilizado, dominado e explorado. A cidade faz-se referencial simbólico nacional e reconhecido patrimônio moderno internacional, o que justifica o desvendamento dos potenciais de conflitos socioterritoriais advindos da relação entre sua patrimonialização e a metropolização. Logo, Brasília Patrimônio da Humanidade será tratada no contexto da macrourbanização que, em efeito bumerangue, ao recobrir a totalidade da metrópole enquanto espaço de vivências múltiplas, cataliza potenciais de conflitos socioterritoriais junto à patrimonialização desta área que é centralidade funcional metropolitana.
CULTURA, PAISAGENS E PATRIMÔNIO CULTURAL: REFLEXÕES DESDE O BRASIL CENTRAL
Authors: De Almeida Maria Geralda
Published: September 2024

Trata-se de uma reflexão sobre as concepções de paisagens e patrimônio ao considerar, principalmente, a base cultural deles. Paisagens culturais são interpretadas na sua complexidade ao envolver a subjetividade e a objetividade. A paisagem emerge como um bem e um recurso ambiental, cultural, cuja valoração é relativa. O valor que os bens culturais possuem é o que a sociedade, por suas práticas sociais, lhe atribui ou o mercado. O turismo, nesse processo, reinventa o patrimônio cultural, este analisado nas perspectivas da Unesco, do Iphan e da Constituição brasileira. Conclui-se que os múltiplos significados das paisagens simbólicas representam muito dos homens que as criaram. A paisagem e o território são dimensões marcadas por elementos patrimoniais, signos da trajetória da sociedade que ativam a memória e situam os grupos definindo suas identidades.
PATRIMÔNIOS, VIVÊNCIAS E REPRESENTAÇÕES DO ESPAÇO EM POLÍTICAS DE REQUALIFICAÇÃO URBANA NA AMAZÔNIA
Authors: Cordeiro da Trindade Júnior Saint-Clair
Published: September 2024

O artigo aborda, a partir da experiência de Belém (Pará), o processo de renovação e de reapropriação do espaço de sua área central. A realidade enfocada serve de ponto de partida para a análise da questão, de maneira a visualizar as características das políticas de requalificação urbana presentes na Amazônia. Na situação em referência, elementos da cultura, da história, da memória e das representações espaciais são levados em conta em experiências de requalificação urbana do centro histórico, repercutindo, em consequência, na redefinição de territorialidades no espaço urbano.
EL PATRIMONIO COMERCIAL, ENTRE EL NEGOCIO Y LA PROTECCIÓN. EL CASO DEL PATRIMONIO COMERCIAL DE BARCELONA
Authors: Moreno Redón Sergio
Published: September 2024

El comercio urbano a pesar de ser una de las actividades urbanas más antiguas y más numerosas tiene una representación dentro del patrimonio cultural de las ciudades muy reducido. En este artículo se exploran algunas de las causas que han ayudado a que esto suceda, así como algunos ejemplos de lo contrario. De la misma forma, se explora cómo los cambios en las concepciones de patrimonio han permitido el reconocimiento del patrimonio “menor”, entre el cual se encontraría el comercio. No obstante, los ejemplos son escasos, tanto de establecimientos supervivientes como de políticas públicas de protección del comercio histórico. El caso de Barcelona muestra una evolución concreta de estrategias en la protección del comercio urbano que va de la protección de los elementos del paisaje a otra más reciente que aboga por la protección de los establecimientos. El artículo también quiere ser una reivindicación de que el comercio, a pesar de sus características particulares puede y debe ser reconocido como patrimonio cultural de la ciudad.
PATRIMÔNIO CULTURAL E TERRITORIALIDADE NEGRA EM RIO CLARO - SP
Authors: C. de Castro Bernadete Aparecida
Published: September 2024

A economia cafeeira, durante o final do século XIX,reuniu nas grandes fazendas monocultoras uma quantidade de escravos que povoou o interior paulista e também a cidade de Rio Claro na qual tinham vários ofícios. A criminalização das práticas e crenças da população afro-descendente foi objeto de legislação e reformas políticas que procuraram afastar os negros e mestiços das conquistas de seus direitos de cidadania. Entretanto, as práticas e saberes dessa população negra deram origem a um patrimônio cultural que se apresenta como espaços de memória e resistências, permitindo a produção de novos conhecimentos sobre a realidade social.
SEMANA FARROUPILHA E O 20 DE SETEMBRO NO RIO GRANDE DO SUL: DISCUTINDO PATRIMÔNIO, MEMÓRIA E SIMBOLISMO
Authors: Rios Gomes Ana Carolina , José Berg Tiago
Published: September 2024

Patrimônio, memória e simbolismo são conceitos fundamentais para a elaboração de referenciais identitários e compreensão de processos culturais. Neste sentido, o presente artigo procura estabelecer refl exões a partir da articulação destes conceitos, tomando como estudo de caso a identidade cultural gaúcha e os festejos de 20 de setembro. A escolha do objeto de estudo se justifi ca pela clareza dos processos históricos de construção da identidade no Rio Grande do Sul, pelas intensas ações de valorização da cultura por meio das tradições, bem como pela relevância dos aspectos simbólicos, altamente presentes no cotidiano do povo gaúcho.
A RELEVÂNCIA DE MÚLTIPLOS GRUPOS ZOOPLANCTÔNICOS PARA O MONITORAMENTO AMBIENTAL NO CERRADO: ESTUDO DA ESTAÇÃO ECOLÓGICA ÁGUAS EMENDADAS
Authors: Gomes Alarcão Adriana , Sena-Souza João Paulo , Oliveira Maciel Bruno Leandro , Albuquerque de Souza Carla , Borges Kisaka Tiago , Ferreira de Santana Juliana , Fernandes Gomes Leonardo , Elias Bernardi José Vicente , Cardoso Galli Vieira Ludgero
Published: September 2024

Devido ao crescente e intenso impacto da população humana sobre os recursos naturais, programas de monitoramento ambiental tornam-se cada vez mais necessários para avaliar continuamente tais impactos e propor medidas mitigadoras em tempo hábil. Entretanto, efi cientes programas de monitoramento são limitados pela falta de tempo, recursos fi nanceiros e profi ssionais qualifi cados. Desta forma, este estudo pretende avaliar estratégias mais efetivas de monitorar a comunidade zooplanctônica em um pequeno lago tropical (Lagoa Bonita, localizada na Estação Ecológica de Águas Emendadas, Brasília - DF). As seguintes questões foram levantadas: (i) qual a diversidade zooplanctônica da área de estudo? (ii) os grupos zooplanctônicos apresentam padrões de distribuição espacial concordantes? (iii) existe uma perda de informação signifi cativa ao utilizar níveis taxonômicos superiores (dados de gêneros ao invés de espécies) e resoluções numéricas diferentes (dados de ocorrência de espécies ao invés de densidades de organismos)? Os resultados desse estudo indicam que programas de monitoramento ambiental na Lagoa Bonita poderiam avaliar cladóceros, copépodes e rotíferos utilizando informações em nível de gênero, pois a perda de informação relativa aos dados de espécies é pequena. Por outro lado, todos os grupos zooplanctônicos e as informações geradas a partir de dados de densidade devem ser considerados.