bluuebunny/crossref_metadata_2025 huggingface dataset:
A Multi-factor Model of COVID-19 Epidemic in California
Authors: Lewis Theodore
Published: August 2023

We describe a multi-factor model of the spread of COVID-19 across the 58 counties of California from March 2020 to June 2023. The model provides estimates of cumulative cases and duration of the epidemic versus 5 independent variables. The independent variables are the following correlated factors: population, population density, family income, Gini coefficient, and land area (size) of each county. The correlation coefficients of these factors are used to reduce the error in models of cumulative cases and duration.

The model produces linear equations – one for cumulative cases and the other for duration of infection. The cumulative case estimate is highly correlated with population, but the estimate is improved by considering all 5 factors. The duration of infection1 estimate is improved by considering population and income level. We also find that infection rate (per capita cases) varies highly and roughly obeys a normal distribution, suggesting randomness, rather than correlation with one or more of the 5 factors.

We also observe the vast differences between high and low cumulative cases across the 58 counties. Using the same model but with different values of correlation of the same factors, we obtain very accurate models of both bottom-half and top-half counties. i.e., counties with 49,000 or fewer cumulative cases versus counties with 50,000 – 3.5 million cases. This suggests that multi-factor models are a suitable alternative to traditional diffusion models especially if an analysis of causal factors is preferred versus estimates of cumulative cases versus time.

An attempt to predict the cumulative cases at the end of the pandemic (1191 days) at one- and two-year intervals reveals the challenge of prediction. The model improves as more data is accumulated but lacks predictive power. We speculate that the model might be extended by noting the convergence rate of successive approximations and then extrapolating. This was left as future work.
Pengaruh Rasio Likuiditas dan Rasio Beban Klaim Terhadap Risk Based Capital Pada PT Lippo General Insurance Tbk Periode 2012-2021
Authors: Ummah Mujahidah Izzatil , Priyanto Aria Aji
Published: August 2023

Tujuan.  Penelitian ini bertujuan untuk menguji Pengaruh Rasio Likuiditas dan Rasio Beban klaim terhadap Risk Based Capital pada PT Lippo General Insurance Tbk periode 2012 – 2021.Metode. Metode yang digunakan dalam penelitian ini adalah kuantitatif dengan beberapa mode uji, diantaranya Analisis Statistik Deskriptif, Uji Asumsi Klasik, Analisis Regresi Linier Berganda, Uji Hipotesis dan Koedisien determinan (R2) dengan menggunakan SPSS versi 24 serta sumber data yang digunakan yaitu data sekunder.Hasil. Hasil penelitian menunjukkan bahwa secara parsial variabel Rasio likuiditas berpengaruh negatif signifikan terhadap Risk Based Capital dengan hasil t hitung > t tabel (-4,169 > 2,3646) dan nilai signifikan (0,004 < 0,05) dan Rasio Beban klaim berpengaruh negatif tidak signifikan terhadap Risk Based Capital dengan hasil t hitung < t tabel (-1,049 < 2,3646) dan nilai signifikan (0,673 > 0,05). Secara simultan Rasio likuiditas dan Rasio Beban klaim berpengaruh signifikan terhadap Risk Based Capital dengan hasil F hitung > F tabel. (9,114 > 4,46) dengan nilai signifikan (0,011 < 0,05). Kemudian diperoleh nilai koefisien determinasi (R square) sebesar 0,723 atau 72,3%, artinya menunjukkan bahwa pengaruh Rasio likuiditas dan Rasio Beban klaim memberikan kontribusi sebesar 72,3% terhadap tingkat Risk Based Capital. Sedangkan sisanya sebesar 27,7% dipengaruhi oleh variabel yang lain yang tidak diteliti dalam penelitian ini.Implikasi. Bagi investor disarankan untuk terlebih dahulu memperhatikan kemampuan perusahaan asuransi dalam memenuhi kewajibannya serta dapat memahami perubahan masing-masing rasio keuangan pada laporan keuangan yang disediakan perusahaaan.
Pengaruh Motivasi Terhadap Kinerja Karyawan Pada PT Sumber Kemas Makmur Gunung Sindur Bogor
Authors: Safiih Abdul Rahman , Abid Muhamad
Published: August 2023

Tujuan. Tujuan dari penelitian ini adalah untuk mengentahui pengaruh motivasi terhadap kinerja karyawan PT Sumber Kemas Makmur Gunung Sindur Bogor.Metode. Metode yang digunakan dalam penelitian ini dengan metode Asosiatif. Populasi dalam penelitian ini adalah seluruh karyawan PT Sumber Kemas Makmur Jumlah sampel yang digunakan sebanyak 137 responden. Teknik pengumpulan data dalam penelitian ini menggunakan kuesioner. Teknik analisis data dengan regresi linier sederhana.Hasil. Hasil penelitian menunjukan bahwa Terdapat pengaruh signifikan antara Motivasi (X) terhadap Kinerja (Y). hal ini ditunjukan dengan nilai thitung Variabel Motivasi (X) terhadap Kinerja (Y) sebesar thitung 41.918 > ttabel 1.695 atau Sig 0.000 < 0.05 Maka Ho ditolak dan Ha diterima artinya terdapat pengaruh signifikan antara Motivasi (X) terhadap Kinerja (Y).Implikasi. Sebaiknya perusahaan lebih memberikan peralatan kerja yang standar dalam menjamin keamanan kerja dan memperhatikan variabel lain seperti pelatihan kerja agar karyawan dapat bekerja dengan baik sesuai standard yang dibuat agar karyawan menguasai bidang pekerjaan dengan hasil yang diharapkan.
Pengaruh Kompensasi, Disiplin Kerja dan Lingkungan Kerja Terhadap Kinerja Karyawan Pada PT. Prima Ufuk Semesta
Authors: Indirasari Indri , Sukapti Sri
Published: August 2023

Tujuan. Tujuan penelitian ini adalah untuk menguji dan menganalisis Pengaruh Kompensasi, Disiplin Kerja dan Lingkungan Kerja Terhadap Kinerja Karyawan Pada PT. Prima Ufuk Semesta.Metode. Desain Penelitian ini menggunakan desain penelitian kausal. Populasi dari penelitian ini adalah seluruh Karyawan Pada PT. Prima Ufuk Semesta. Jumlah sampel yang digunakan sebanyak 60 responden dengan teknik sampling jenuh. Metode analisis data menggunakan Partial Least Square (PLS). Hasil. Kompensasi berpengaruh positif dan signifikan terhadap Kinerja Karyawan Pada PT. Prima Ufuk Semesta. Disiplin kerja berpengaruh positif dan signifikan terhadap Kinerja Karyawan Pada PT. Prima Ufuk Semesta. Lingkungan kerja berpengaruh positif dan signifikan terhadap Kinerja Karyawan Pada PT. Prima Ufuk Semesta.Implikasi. Untuk meningkatkan kinerja karyawan Pada PT. Prima Ufuk Semesta khususnya dimensi kerjasama yang tinggi dapat meningkat jika perusahaan meningkatkan kompensasi khususnya dimensi insentif yang tinggi, dimana kinerja karyawan akan dapat ditingkatkan jika mampu meningkatkan disiplin kerja khususnya dimensi  taat terhadap peraturan lainnya diperusahaan yang tinggi, serta meningkatkan lingkungan kerja terutama dimensi Lingkungan Kerja non Fisik yang tinggi.
Place Branding Eduwisata Kampung Cabe: Sebuah Rekomendasi
Authors: Hapsari Andriyani , Nani Nani
Published: August 2023

Tujuan. Penelitian ini bertujuan untuk merumuskan strategi bagi Kampung Cabe untuk membangun place branding sebagai daerah tujuan wisata. Mengingat desa ini selalu diasosiasikan sebagai desa miskin.Metode. Penelitian ini merupakan penelitian kualitatif dengan pendekatan eksploratori. Pengumpulan data dilakukan melalui observasi, wawancara, penyebaran kuesioner dan studi literatur pada berbagai sumber ilmiah. Hasil. Dari penelitian ini dapat dirumuskan bahwa terdapat tiga tahapan yang harus dilakukan untuk membangun place branding, yaitu pertama mendefinisikan kembali identitas pada nilai dan produk yang ingin disampaikan, meningkatkan keterlibatan masyarakat, dan membangun kemitraan pentahelix antara pemerintah, masyarakat, akademisi, pelaku usaha, dan media masaImplikasi. Hasil dari penelitian ini dapat bermanfaat dalam pengembangan ilmu manajemen pemasaran, khususnya dalam mengembangkan branding daerah tujuan wisata yang memiliki latar belakang kurang beruntung.
Kinerja Karyawan Berbasis Budaya Organisasi, Beban Kerja dan Disiplin Kerja Pada Pt. Anugrah Bersama Sejahtera Depok
Authors: Sunarto Ading , Agrasadya Agrasadya , Apriansyah Muger
Published: August 2023

Tujuan. Penelitian ini tentang pengaruh budaya organisasi, beban kerja dan disiplin kerja terhadap kinerja karyawan pada PT. Anugrah Bersama Sejahtera Depok. Penelitian ini bertujuan untuk mengetahui pengaruh budaya organisasi terhadap kinerja karyawan pada PT. Anugrah Bersama Sejahtera Depok, untuk mengetahui pengaruh beban kerja terhadap kinerja karyawan pada pada PT. Anugrah Bersama Sejahtera Depok, untuk mengetahui pengaruh disiplin kerja terhadap kinerja karyawan pada PT. Anugrah Bersama Sejahtera Depok dan untuk mengetahui pengaruh budaya organisasi, beban kerja dan disiplin kerja secara bersama-sama pada PT. Anugrah Bersama Sejahtera Depok.Metode. Populasi dan sampel dalam penelitian ini adalah karyawan PT. Anugrah Bersama Sejahtera Depok dengan jumlah sampel sebanyak 150 responden. Penelitian ini merupakan penelitian kuantitatif. Selanjutnya sampling yang digunakan adalah non-probability sampling dengan teknik yang diambil yaitu sampling jenuh. Teknik analisis data yang digunakan meliputi uji validitas, uji reliabilitas, uji normalitas, uji multikorelasi, uji heteroskedastisitas, regresi linier, koefisien determinasi dan uji signifikan (uji t dan uji F).Hasil. Terdapat pengaruh secara parsial budaya organisasi kerja terhadap kinerja, terdapat pengaruh secara parsial beban kerja terhadap kinerja, terdapat pengaruh secara parsial disiplin kerja terhadap kinerja dan pengaruh positif dan signifikan secara bersama-sama antara variabel budaya organisasi, beban kerja dan disiplin kerja terhadap kinerja karyawan.Implikasi. Sebaiknya perusahaan memberikan motivasi dan semangat kerja agar karyawan dapat lebih giat lagi dalam bekerja dan memberikan arahan terkait pemanfaatan waktu kerja secara maksimal sehingga dapat memberikan kontribusi yang optimal dan membuat peraturan yang tegas terkait dengan tugasnya. dan tanggung jawab pekerjaan karyawan. Apabila pekerjaan belum selesai maka karyawan harus diberikan waktu lembur (over time) agar pekerjaan dapat diselesaikan dengan maksimal dan target produksi dapat tercapai. Selain itu, karyawan terkadang diberikan penugasan pekerjaan dengan tingkat kesulitan yang cukup tinggi agar mereka lebih terlatih dan profesional.
Pengaruh Kualitas Produk, Brand Trust, dan Kelompok Referensi, Terhadap Minat Beli Sepeda Mtb Polygon Pada Komunitas Gowes di Ponorogo
Authors: Muslim Bahtiar , Rapini Titi , Wahyuningsih Dwi Warni
Published: August 2023

Tujuan. Penelitian ini bertujuan untuk mengetahui pengaruh Kualitas Produk, Brand Trust, Dan Kelompok Referensi terhadap Minat Beli Sepeda MTB Polygon Pada komunitas Gowes di PonorogoMetode. Metode dalam penelitian ini menggunakan metode kuatitatif. Data diperoleh dalam penelitian ini dengan penyebaran kuisioner yang berisikan pernyataan tertulis kepada responden dan alat untuk menganalisis menggunakan aplikasi softwere SPSS 26. Populasi yang diambil dalam penelitian ini adalah komunitas gowes di Ponorogo. Penentuan sampel penelitian ini sejumlah 100, dengan metode Teknik accidental sampling.  Hasil. Hasil penelitian ini menyatakan bahwa : (1) Terdapat pengaruh positif dan siginifikan secara parsial antara Kualitas Produk terhadap minat beli sepeda MTB Polygon pada komunitas gowes di Ponorogo, (2)  Terdapat pengaruh positif dan siginifikan secara parsial antara Brand Trust  terhadap minat beli sepeda MTB Polygon pada komunitas gowes di Ponorogo, (3) Terdapat pengaruh positif dan siginifikan secara parsial antara Kelompok Referensi terhadap minat beli sepeda MTB Polygon pada komunitas gowes di Ponorogo, (4) Terdapat pengaruh positif dan signifikan secara simultan antara Kualitas Produk, Brand Trust, dan Kelompok Referensi terhadap minat beli sepeda MTB Polygon pada komunitas gowes di Ponorogo.  Implikasi. Berdasarkan hasil Penelitian dari variabel kualitas produk, brand trust, dan kelompok referensi berkontribusi pada minat beli sepeda MTB Polygon, maka dari itu perlu adanya upaya untuk mempertahankan kualitas dan persepsi tentang kepercayaan pada produk sepeda Polygon, upaya tersebut bisa dengan melihat dan memahami keinginan pelanggan supaya tercipta pengalaman positif yang nantinya akan menjadi acuan konsumen lain dalam minat pembelian sepeda.
Pengaruh Profitabilitas dan Struktur Aset terhadap Struktur Modal (Studi Empiris Pada Perusahaan Properti dan Real Estate yang Terdaftar di BEI Tahun 2016 – 2021)
Authors: Mutawali Mutawali , Lestari Irna , Widiyanti Selvy Dwi
Published: August 2023

Tujuan. Penelitian ini bertujuan untuk menguji dan memperoleh bukti secara empiris mengenai Pengaruh Profitabilitas dan Struktur Aset Terhadap Struktur Modal. Penelitian ini menggunakan sampel perusahaan properti dan real estate yang terdaftar di BEI tahun 2016 – 2021.Metode. Jenis penelitian ini yaitu kuantitatif dengan 7 perusahaan yang dijadikan sampel penelitian dengan pengamatan selama 6 tahun, sehingga total sampel penelitian sebanyak 42 perusahaan. Metode penentuan sampel yang digunakan dalam penelitian ini adalah purposive sampling dengan menggunakan E-views versi 9 untuk analisis datanya.Hasil. Berdasarkan hasil uji t (parsial) profitabilitas memiliki nilai Prob. Sebesar 0.0034 < 0.05 maka kesimpulannya yaitu bahwa variabel profitabilitas secara parsial berpengaruh signifikan terhadap struktur modal. Struktur aset memiliki nilai Prob. Sebesar 0.0001 < 0.05 maka kesimpulannya yaitu bahwa variabel struktur aset secara parsial berpengaruh signifikan terhadap struktur modal. Berdasarkan hasil uji f (secara simultan) Prob (F-statistic) sebesar 0.000000 < 0.05 maka kesimpulannya bahwa variabel profitabilitas dan struktur aset secara bersama-sama (simultan) berpengaruh terhadap struktur modal. Nilai Adjusted R-squared (R2) adalah 0.925980 atau sebesar 92.59% yang berarti bahwa kemampuan variabel independen yang digunakan dalam penelitian ini yaitu Profitabilitas dan Struktur Aset dalam menjelaskan variabel dependen (Struktur Modal) sebesar 92.59%.Implikasi. Bagi perusahaan, diharapkan dapat memperhatikan penggunaan dana perusahaan untuk digunakan secara optimal baik dana internal maupun eksternal, agar penggunaan dana eksternalnya tidak terlalu besar dalam melakukan kegiatan perusahaan.
Manajemen Keuangan Keluarga di Masa Pandemi Covid-19
Authors: Mardiana Sri , Hasanah Yenny Merinatul , Kurniawan Prasetyo
Published: August 2023

Tujuan. Penelitian ini bertujuan untuk mengetahui bagaimana manajemen keuangan keluarga pada masa pandemi covid 19 dan Apa saja faktor penghambat dan faktor pendukung manajemen keuangan keluarga di masa pandemi Covid-19.Metode. Metode dalam penelitian ini adalah dengan pendekatan kualitatif dengan teknik pengambilan data melalui observasi, dokumentasi dan wawancara. Teknik analisis data melalui pengumpulan data, reduksi data, penyajian data dan penarikan kesimpulan. Teknik analisis data menggunakan trianggulasi metode dan sumber.Hasil. Hasil penelitian ini adalah pengelolaan keuangan keluarga yang meliputi perencanaan, pelaksanaan, dan evaluasi oleh ibu-ibu rumah tangga belum dilakukan secara maksimal. Adapun faktor pengahambat manajemen keuangan pada masa pandemi covid 19 adalah karena ketidakpastiannya penghasilan yang didapatkan tetapi pengeluaran semakin banyak.Implikasi. Pengelolaan keuangan keluarga oleh ibu-ibu rumah tangga memerlukan perencanaan, pelaksanaan serta evaluasi dan mencari penghasilan tambahan dengan berbisnis online sehingga dapat mempertahankan keuangan keluarga saat pandemic covid 19.
Bagaimana tingkat literasi keuangan ibu rumah tangga ditinjau dari tingkat pendidikan dan tingkat pendapatan?
Authors: Astuti Mia , Afriza Edi Fitriana , Aisyah Iis
Published: August 2023

Penelitian ini dilakukan dengan tujuan untuk mengetahui literasi keuangan ibu rumah tangga di Kelurahan Margabakti ditinjau dari tingkat pendidikan dan tingkat pendapatan di Kelurahan Margabakti Kota Tasikmalaya. Metode yang digunakan dalam penelitian ini adalah metode deskriptif kualitatif dengan teknik pengumpulan data melalui observasi, wawancara dan dokumentasi. Adapun teknik analisisnya menggunakan interactive model. Sampel penelitian yang dijadikan informan sebanyak 7 orang yang terdiri dari ibu rumah tangga yang berpendidikan SD, SMP, SMA dan S1 serta ibu rumah tangga yang mengelola keuangan keluarganya yang pendapatan keluarganya tergolong pada kategori rendah, sedang, tinggi dan sangat tinggi, yang penulis kenal dan dapat ditemui secara langsung. Dari hasil penelitian ditemukan bahwa tingkat pendidikan dan tingkat pendapatan berkontribusi terhadap literasi keuangan ibu rumah tangga. Empat diantara tujuh ibu rumah tangga memiliki literasi keuangan yang kurang baik dan tiga diantara tujuh ibu rumah tangga memiliki literasi keuangan yang cukup baik.
A Novel Fake-News Dataset and Detection System to Mitigate Cyber War with Emphasis on Nigerian News Events
Authors: Samera Uga Otor  , Beatrice Obianiberi Akumba  , Joseph Sunday Idikwu
Published: August 2023

Fake-news refers to a cyber-weapon launched through the social media, as, its consequence can result to the breakdown of law and order in the society both physically and on the cyber-social-space. In Nigeria, there is currently no established law that guides the use of social media. Therefore, the rate at which fake-news propagates is alarming. This paper presents a new dataset, with focus on Nigeria’s trending news such as EndSARS and Herdsmen attacks, which was further used to simulate Convolutional Neural Network (CNN) and Recurrent Neural Network (RNN) machine learning models to detect fake-news. The data were extracted from twitter using twitter Application Package Interface (API) and from facebook using a scraping tool. The dataset was encoded using Unicode escape function in python to make all characters accessible by the algorithm and tokenised using Global Vectors for Word Representation. The dataset was used to train CNN and RNN models built in python on google colab platform to detect fake-news using accuracy, sensitivity, recall and F1 score as evaluation metrics. Results showed that RNN performed better in terms of accuracy and precision, at 82.34% and 93.19% compared to 81.96% and 79.65% for CNN, F1 scores are approximately the same for both models and CNN performed better than RNN in terms of recall at 98.03% to 50.61% for RNN.
Studies on Nucleation and Growth Kinetics, Molecular Structure, Spectral Characterization and Antibacterial activity of DL-Methioninium Maleate Compound for Biological Applications
Authors: S. Azhagiri  , P. Vasudevan  , G. Saravana Kumar  , D. Jeyaraman
Published: August 2023

Single crystals of DL-methioninium maleate (abbreviated as DLMM) were synthesized by slow evaporation technique from aqueous solution at room temperature. Before growing the crystal, the nucleation kinetics was analysed to estimate the critical supersaturation required for the growth of good quality crystal. The classical theory was employed to analyse the growth kinetics of the crystal. Using single crystal X-ray diffraction analysis, the lattice dimensions of the title compound were found to be a = 11.07 Å, b = 5.74 Å, and c = 19.69 Å. The crystallized compound belongs to monoclinic system (space group P21/c). From the powder X-ray diffraction study the different planes of the reflections have been distinguished and the results were confirmed. The molecular structure of the grown crystal DLMM was also analysed by using SHELXT-2014/7 program. The results indicate that the cationic form of the DL-methioninium molecule consists of a protonated amino group and an uncharged carboxylic acid group. The maleic acid molecule exists in its mono-ionized state. By observing the UV-Visible absorbance spectrum, the range and percentage of absorption and the material band gap were evaluated for the grown material. The absorption coefficient, complex refractive index and the optical transparency of the compound depend upon the optical band gap of the material. From the value of band gap (3.96eV) of the material, the absorption coefficient can be assessed. The absorption coefficient is an additional factor to elucidate the antibacterial behaviour of the material. Fourier transform infrared (FTIR) spectra have been used to determine the vibrational frequency of several DL-methioninium maleate functional groups. Using proton and carbon nuclear magnetic resonance (NMR) spectra, the presence of hydrogen and carbon in the formed crystal was verified. The presence of sulphur component in the grown material is one of the prime factors of the bioactive material. By using the Agar disc diffusion method, the antibacterial properties of the grown compound were also examined. The anti-bacterial activities of DLMM compound suggest that it can be employed to treat a number of bacterial infections in the field of pharmaceutical science.
On The Resonant Frequency and Bandwidth of Multilayered Square Patch Microstrip Antennas
Authors: Sandhya Mann
Published: August 2023

In the present paper a novel technique has been developed to compute the resonant frequency and bandwidth of electromagnetically coupled multilayered square patch microstrip antenna (MLSPMA) on low (ɛr=2.33) and high (ɛr=10.8 ) index RT Duroid substrate in S and X band of microwave frequencies. The basic antenna structure considered is a multidielectric layered with a spaced parasitic director. The radiator (lower patch) and the parasitic patch (upper patch) are considered to have same and slightly different dimensions, and are perfectly registered (no offset). It is observed that the antenna geometry can be optimised for the required frequency operation and bandwidth by adjusting input parameters and the thickness of the layers.
A Review of the Role of Big Data Analytics in Healthcare
Authors: Lekha Rajaram Dubale  , Rutik Ramesh Keer  , Waman Radhakrsihna Parulekar
Published: August 2023

The healthcare industry generates massive amounts of data, from patient records to clinical trial results, which can be utilized to improve patient outcomes, reduce costs, and enhance the efficiency of healthcare delivery. Big data analytics is a technology that can help healthcare organizations make sense of these vast amounts of data. The potential benefits of big data analytics in healthcare include improved patient outcomes, reduced costs, enhanced efficiency, and more accurate diagnoses. However, big data analytics also presents significant challenges, including data privacy and security, and the complexity of healthcare data. This research paper aims to explore the role of big data analytics in healthcare, focusing on its potential benefits, challenges, and applications. By understanding the potential of big data analytics in healthcare and the challenges it presents, healthcare organizations can leverage this technology to improve healthcare delivery and patient outcomes.
Prediction of Alzhimers Disease from 4 Class of MRI Images Using Inception V3 Model in Deep Learning
Authors: Bodireddy Poornima  , P. Nageswara Rao
Published: August 2023

Today, Alzheimer's Disease (AD), a degenerative neurological disorder, is the most common cause of dementia. Although it can affect anyone, older folks are often the ones who are affected. Alzheimer's disease (AD) is distinguished by a gradual decline in cognitive function, memory loss, atypical behaviour and personality, and difficulties with daily activities. Although the exact cause of AD is still unknown, a combination of genetic, environmental, and lifestyle factors are thought to be responsible. Several techniques, including machine learning and data analysis, are used in the prediction of Alzheimer's disease (AD), either to identify those who are at risk of contracting the illness or to predict how patients will fair over time. Treatments may be more effective, and patient outcomes may be improved, thanks to early detection and management made possible by AD prediction. There are numerous methods for predicting AD, and they usually include information from the clinical, genetic, and neuroimaging fields. Since the Inception module of the V3 network combines a max-pooling operation with multiple simultaneous convolutional operations with different filter sizes (1x1, 3x3, and 5x5), we attempt to identify AD using the Inception V3 model in this paper. By performing many actions simultaneously, the network can collect properties at different sizes and minimise spatial dimensions, allowing for more efficient representation learning. By running numerous tests on the Inception V3 model using a variety of MRI pictures as input, we eventually outperformed several other models with an accuracy of 77.08%.
Inequalities Related to Some Trigonometric and Hyperbolic Functions
Authors: Amrut Nirwal  , Rupali Shinde
Published: August 2023

In current paper we are elaborated few Trigonometric and Hyperbolic inequalities using well known Bernoulli’s Number and Polynomial of trigonometric and hyperbolic functions.
Influence of Product Quality, Service Quality, and Promotion on Consumer Loyalty in E-Commerce Shopee with Consumer Satisfaction as Intervening Variable
Authors: Sahni Damerianta  , Farida  , Ika Hardiana  , Jalinas
Published: August 2023

Technological developments are increasingly rapidly affecting lifestyles that are increasingly striking, because technological developments affect mass communication models to carry out daily life activities, such as e-commerce is the distribution, purchase, sale marketing of goods and services through electronic means such as the internet or television, www or networks. Other computer. One of them is Shopee, which is an an application engaged in buying and selling online and can be accessed easily using a smartphone. The purpose of this study was to analyze the effect of product quality, service quality, and promotion on consumer loyalty in e-commerce Shopee, with consumer satisfaction as an intervening variable. The method of analysis in this study uses primary data, the test stages carried out are the outer model and the inner model. The data used in this study using a questionnaire instrument using google form, and valid data collected as many as 210 respondents. The sampling method in this research is non-proability sampling with purposive sampling technique. The testing tool used is SmartPls 3.0. The results of the study seen from the path coefficient indicate that product quality and service quality have a positive and significant effect on consumer satisfaction, while promotion has no significant effect on consumer satisfaction. Product quality, service quality, and promotion have no significant effect on consumer loyalty. Consumer satisfaction has a positive and significant effect on consumer loyalty.
Design And Implementation of Low-Cost Solar Dryer For Sun-Dried Guava Production
Authors: Asa Taufiqurrahman  , Heri Sutanto  , Sri Widodo Agung Suaedy
Published: August 2023

Crystal guava (Psidium guajava) is a commodity that is widely cultivated in Kebumen. Innovation is needed to increase its selling value, one of which is by producing dried guava. The production of dried guava can be achieved using a solar dryer. In this research, the design and testing of a low-cost solar dryer for producing dried guava were conducted. The main materials used were wood, aluminum pipes, aluminum foil as solar collectors, and solar panels to supply power to DC fans, thus enhancing drying efficiency. The energy analysis revealed that the average collector efficiency, drying efficiency, and specific energy consumption were 73%, 8.84%, and 0.182 kWh/kg, respectively, for the forced convection solar dryer (FCSD), and 42%, 4.61%, and 0.236 kWh/kg, respectively, for the natural convection solar dryer (NCSD). Moreover, in this research, the moisture content of guava, initially at 85%, decreased to 10.73% for FCSD and 25.05% for NCSD. The payback period for this project is estimated to be 1.79 years, enabling guava farmers to use this solar dryer to enhance the selling value of their products.
An Evolutionary Fake News Detection Based on Tropical Convolutional Neural Networks (TCNNs) Approach
Authors: Dr. Vishal Verma  , Apoorva Dwivedi  , Kajal  , Prof. (Dr.) Devendra Agarwal  , Dr. Fokrul Alom Mazarbhuiya  , Dr. Yusuf Perwej
Published: August 2023

In general, the characteristics of false news are difficult to distinguish from those of legitimate news. Even if it is wrong, people can make money by spreading false information. A long time ago, there were fake news stories, including the one about "Bat-men on the moon" in 1835. A mechanism for fact-checking statements must be put in place, particularly those that garner thousands of views and likes before being refuted and proven false by reputable sources. Many machine learning algorithms have been used to precisely categorize and identify fake news. In this experiment, an ML classifier was employed to distinguish between fake and real news. In this study, we present a Tropical Convolutional Neural Networks (TCNNs) model-based false news identification system. Convolutional neural networks (CNNs), Gradient Boost, long short-term memory (LSTMs), Random Forest, Decision Tree (DT), Ada Boost, and attention mechanisms are just a few of the cutting-edge techniques that are compared in our study. Furthermore, because tropical convolution operators are fundamentally nonlinear operators, we anticipate that TCNNs will be better at nonlinear fitting than traditional CNN. Our analysis leads us to the conclusion that the Tropical Convolutional Neural Networks (TCNNs) model with attention mechanism has the maximum accuracy of 98.93%. The findings demonstrate that TCNN can outperform regular convolutional neural network (CNN) layers in terms of expressive capability.
A Survey on The Effects of Using Videos in Biology Lessons on Student Performance
Authors: Whajah Samuel Miezah  , Gifty Whajah
Published: August 2023

A compelling and motivating approach should be supported in the information and communication technology-driven 21st century to aid students in learning more effectively. Due to its beneficial effects on the teaching and learning process, the use of multimedia in education has demonstrated its significance. The study investigated an examination of how the use of multimedia in a biology lesson affected students' performance. Three senior high schools' worth of 200 students were chosen at random, and they were divided into three groups at random. The study's quasi-experimental pre-post-control group design was used. While the control group received conventional care, the experimental groups were trained via multimedia presentations. The course of treatment lasted for 12 weeks. As data collection tools, the Biology Achievement Test (BAT), which was also validated, was examined for dependability using the Crombach alpha, which produced a result of 0.92, and the Validated Attitude Towards Biology Scale (ATBS), which produced a Crombach alpha of 0.86. Both descriptive and inferential statistics were used to analyze the acquired data. The findings showed a statistically significant difference between the forms of instruction and the learning outcomes of the students. Students receiving multimedia-assisted instruction performed better than their peers receiving traditional instruction. Therefore, it is advised that multimedia assisted instruction be implemented in the senior high school biology curriculum to enhance students' learning results.
Carcinoma epidermóide sarcomatóide da Laringe. Estudo ultra-estrutural e imuno-histoquímico
Authors: Soares Fernando Augusto , Peres Luiz Cezar , Bacch Carlos Eduardo , Landell Gláucia Aparecida M. , Mamede Rui Celso M. , Mello Filho Francisco Veríssimo , Caldeira Gustavo Adolpho P.
Published: August 2023

O carcinoma epidermóide sarcomatóide da laringe é neoplasia rara que continua a estimular controvérsias entre os patologistas. Vários termos têm sido usados para descrever tal lesão, incluindo carcinossarcom.a, carcinoma de células fusiformes, carcinoma sarcomatóide, pseudossarcoma, carcinoma epidermóide com estroma "sarcoma like" carcinoma pleomórfico, carcinoma polipóide e carcinoma metaplásico. O achado histopatológico característico é a presença de carcinoma epidermóide associado a componente de células fusiformes. Apresenta-se caso de paciente masculino, 59 anos, branco, com queixa de disfonia há 1 ano, acompanhada de disfagia e dispnéia. Ao exame laringoscóplco indireto notou-se extensa lesão tumoral localizada na Iaringe com destruição parcial da glote. O exame histopatológico demonstrou tratar-se de carcinoma epidermóide bem diferenciado com extensas áreas anaplásicas,. de componente fusocelular. Acompanhava massa tumoral metastática peritraqueal com componente fusocelular exclusivo. Realizou-se estudo ultra-estmtural e imuno-histoquímico da lesão metastática. A microscopia eletrônica demonstrou a presença de agrupamentos ocasionais de células justapostas unidas por desmossomos infrequentes, mas bem definidos. Estas apresentavam núcleos irregulares e abundante RER distendido. A imunoperoxidase revelou o achado de células isoladas positivas para ceratina de alto peso molecular em meio ao componente fusocelular exclusivo. Deste modo o presente caso contribui para a discussão da histogênese da neoplasia, falando a favor da teoria da metaplasia mesenquimal do carcinoma epidermóide.
O uso da Buprenorfina Sublingual (TEMGESIC) no Alívio da Dor em Pacientes com Câncer. Um Estudo em 32 Doentes
Authors: Juaçaba Haroldo Godim
Published: August 2023

Um estudo no controle da dor em doentes com câncer, através da Buprenorfina sublingual (Temgesic), foi realizado em 32 pacientes. Foram discutidos os problemas na avaliação c na exata mensuração da dor, tendo sido usadas três escalas para julgar a sua intensidade. Entre os paraefeitos da droga, os mais comuns foram: náuseas em 12,5%, vômitos em 21,8%, tonturas em 6,2% e sonolência em 15,6%. Dos 7 pacientes que apresentaram vômitos, 4 eram portadores de câncer gástrico ou de metástases hepáticas e tinham aquele sintoma antes de iniciar o tratamento com o Temgesic. A sonolência foi mais freqüente em pacientes idosos, acima de 70 anos, os quais conseguiram diminuição daquele sintoma após reduzirem a dose de 20 microgramas de 12/12 horas para 10 microgramas em intervalos de 6/6 horas. O efeito analgésico foi maior nos idosos; foi excelente nas metástases ósseas, muito bom nos tumores pélvicos e pouco satisfatório nos portadores de câncer gástrico. A aplicação sublingual, comparada com os analgésicos anteriormente aplicados por via parenteral, mereceu maior aprovação dos doentes.
Herpetic Esophagitis Mimicking Carcinoma In Situ
Authors: Peres Luiz Cesar , Barbieri Neto José , Rossi Marcos Antonio , Moriel Antonio Roberto , Bacchi Carlos Eduardo
Published: August 2023

Herpes Simplex virus (HSV) type I is a common infectious agent of nongenital areas and has been diagnosed most frequently in esophagitis even in otherwise healthy subjects. Although some mild cellular alterations are commonly seen in this disease they can hardly be so intense as to simulate a carcinoma in situ of squamous epithelium.  We report such a case and call attention to the possibility of an overdiagnosis of cancer. Some observations in literature relating HSV infection. to cancer are also made.
A case report of Kocher Debre Semelaigne syndrome – Congenital hypothyroidism with pseudomuscular hypertrophy
Authors: Fatima Nidha , Adil Faraaz , G Pathan Habib
Published: August 2023

Kocher Debre Semealaigne Syndrome (KDSS) is a rare condition with the manifestation of hypothyroidism associated with pseudomuscular hypertrophy. This syndrome is rare in countries with screening programs for hypothyroidism at birth. We are reporting a rare case of KDSS in which earlier diagnosis and treatment would result in the reversal of many symptoms. The main objective of presenting this case is to enlighten pediatricians about prompt diagnosis and timely management to prevent avoidable complications.
Emotional Shocks and Performance: Evidence from the FIFA World Cup
Authors: Tena J. D. , Tovar Jorge
Published: August 2023

Abstract: Significant events can trigger emotions affecting individuals’ performance. This paper uses granular, event-level data from the 2018 FIFA football World Cup to study how scored and conceded goals impact performance as measured by each player’s passing ability. These emotional swings allow for the study of these shocks’ influence and duration on players’ ability to pass the ball. The main result shows that conceded goals negatively impact individual performance between three and nine minutes of the trigger effect, while scored goals do not significantly impact passing ability at the conventional levels.
Active Slip Mode Analysis of an Additively Manufactured Ti-6Al-4V Alloy via In-Grain Misorientation Axis Distribution
Authors: Li Chen , Sun Jingli , Feng Aihan , Wang Hao , Zhang Xiaoyu , Zhang Chaoqun , Zhao Fu , Cao Guojian , Qu Shoujiang , Chen Daolun
Published: August 2023

Selective laser-melted (SLM) Ti-6Al-4V alloy was quasi-statically compressed in the transverse and longitudinal directions at a strain rate of 1 × 10−3 s−1 at room temperature. The twinning, in-grain misorientation axis (IGMA) distribution and active slip modes of individual grains in the deformed SLM Ti-6Al-4V alloy were studied in detail via transmission Kikuchi diffraction (TKD) and transmission electron microscopy (TEM). The α’/α phase was textured with the c-axis oriented either at ~45° or perpendicular to the building direction (BD). A combined analysis of the IGMA distribution and Schmid factor revealed that the prismatic  slip or pyramidal slip was easily activated in the soft grains with their c-axes perpendicular to the BD (or the loading direction) in the longitudinal compressed sample, while slip was hardly activated in the transverse compressed sample due to the lack of soft grains. Prismatic  slip with IGMA around <0001> Taylor axis also occurred in {10–11} twins. The observations revealed that the prismatic  slip played a key role in accommodating the external strain and, thus, well explained the anisotropy of mechanical properties in the SLM Ti-6Al-4V alloy.
Foaming of friction stir processed Al/MgCO3 precursor via flame heating
Authors: Shandley Rohit , Maheshwari Sachin , Siddiquee Arshad Noor , Mohammed Sohail M. A. Khan , Chen Daolun
Published: August 2023

In the recent years, metal foams have become promising candidate materials in the engineering sector owing to their light weight and excellent energy absorption properties. Friction stir processing (FSP) has emerged as a cost-effective route to fabricate metal foam precursors from bulk substrates. Although the short processing time in FSP is able to provide high productivity, the cost of the foaming agent, TiH2 in the case of aluminum foams is still high. This paper introduces flame heating to achieve localized foaming of aluminum alloy AA5754 to explore the possibility of using magnesium carbonate as a foaming agent stirred using multi-pass FSP. A specially designed slot based strategy using two plates arranged in lap configuration is devised to stir the foaming agent and understand the material movement after each subsequent pass. Microscopy techniques were carried out to evaluate the distribution of the foaming agent after each pass and the resulting microstructure of the processed plates as well as the morphology of the foamed sample. EDX results showed higher Mg and O content around the pore walls.
Modeling the dependence of strength on grain sizes in nanocrystalline materials
Authors: He Wei , Bhole Sanjeev D. , Chen Daolun
Published: August 2023

A model was developed to describe the grain size dependence of hardness (or strength) in nanocrystalline materials by combining the Hall–Petch relationship for larger grains with a coherent polycrystal model for nanoscale grains and introducing a log-normal distribution of grain sizes. The transition from the Hall–Petch relationship to the coherent polycrystal mechanism was shown to be a gradual process. The hardness in the nanoscale regime was observed to increase with decreasing grain boundary affected zone (or effective grain boundary thickness, Δ) in the form of Δ−1/2. The critical grain size increased linearly with increasing Δ. The variation of the calculated hardness value with the grain size was observed to be in agreement with the experimental data reported in the literature.
Cyclic Deformation Behavior of A Heat-Treated Die-Cast Al-Mg-Si-Based Aluminum Alloy
Authors: Mohammed Sohail , Gupta Shubham , Li Dejiang , Zeng Xiaoqing , Chen Daolun
Published: August 2023

The purpose of this investigation was to study the low-cycle fatigue (LCF) behavior of a newly developed high-pressure die-cast (HPDC) Al-5.5Mg-2.5Si-0.6Mn-0.2Fe (AlMgSiMnFe) alloy. The effect of heat-treatment in comparison with its as-cast counterpart was also identified. The layered (α-Al + Mg2Si) eutectic structure plus a small amount of Al8(Fe,Mn)2Si phase in the as-cast condition became an in-situ Mg2Si particulate-reinforced aluminum composite with spherical Mg2Si particles uniformly distributed in the α-Al matrix after heat treatment. Due to the spheroidization of intermetallic phases including both Mg2Si and Al8(Fe,Mn)2Si, the ductility and hardening capacity increased while the yield stress (YS) and ultimate tensile strength (UTS) decreased. Portevin–Le Chatelier effect (or serrated flow) was observed in both tensile stress–strain curves and initial hysteresis loops during cyclic deformation because of dynamic strain aging caused by strong dislocation–precipitate interactions. The alloy exhibited cyclic hardening in both as-cast and heat-treated conditions when the applied total strain amplitude was above 0.4%, below which cyclic stabilization was sustained. The heat-treated alloy displayed a larger plastic strain amplitude and a lower stress amplitude at a given total strain amplitude, demonstrating a superior fatigue resistance in the LCF regime. A simple equation based on the stress amplitude of the first and mid-life cycles ((Δ𝜎/2)𝑓𝑖𝑟𝑠𝑡(��/2)�����, (Δ𝜎/2)𝑚𝑖𝑑(��/2)���) was proposed to characterize the degree of cyclic hardening/softening (D): 𝐷=±(Δ𝜎/2)𝑚𝑖𝑑 − (Δ𝜎/2)𝑓𝑖𝑟𝑠𝑡(Δ𝜎/2)𝑓𝑖𝑟𝑠𝑡,�=±(��/2)��� − (��/2)�����(��/2)�����, where the positive sign “+” represents cyclic hardening and the negative sign “−“ reflects cyclic softening.
Silicon Nitride Whisker-Reinforced Aluminum Matrix Composites: Twinning and Precipitation Behavior
Authors: Qu Shoujiang , Feng Aihan , Geng Lin , Sheng Jun , Chen Daolun
Published: August 2023

Aluminum composites reinforced with ceramic whiskers exhibited a unique combination of high specific strength and superior specific modulus. A 20 vol.% Si3N4w/Al-11.5Si-1.0Mg-0.5Cu-0.5Ni (wt.%) composite was fabricated via squeeze casting in the present study. It was observed that the addition of silicon nitride (Si3N4) whiskers in the Al-Si cast alloy promoted extensive twinning in the eutectic silicon particles due to a coupled role of thermal stresses between the matrix and silicon and residual stresses present in the composite. Double aging peaks were present in the age-hardening curves. The precipitation mechanism involved the formation of Mg2Si and Al2CuMg phases. The presence of Si3N4 whiskers in the composite retarded the nucleation process of Mg2Si precipitate while enhancing its growth rate.
Reducing Yield Asymmetry between Tension and Compression by Fabricating ZK60/WE43 Bimetal Composites
Authors: Zhao Kangning , Xu Dexing , Song Xiao , Ma Yingzhong , Li Hongxiang , Zhang Jishan , Chen Daolun
Published: August 2023

In this study ZK60/WE43 bimetal composite rods were manufactured by a special method of hot diffusion and co-extrusion. Interface microstructure, deformation mechanism, and yield asymmetry between tension and compression for the composite rods were systematically investigated. It was observed that the salient deformation mechanism of the ZK60 constituent was {10-12}<−1011> extension twinning in compression and prismatic slip in tension, and different deformation modes resulted in yield asymmetry between tension and compression. In contrast, the WE43 constituent tends to be more isotropic due to grain refinement, texture weakening, solid-solution and precipitation strengthening, which were deformed via basal slip, prismatic slip, and {10-12}<−1011> extension twinning in both tension and compression. Surprisingly, it was found that yield asymmetry between tension and compression for the ZK60/WE43 composite rods along the extrusion direction was effectively reduced with a compression-to-tension ratio of ~0.9. The strongly bonded interface acting as a stress transfer medium for the ZK60 sleeve and WE43 core exhibited the coordinated deformation behavior. This finding provides an effective method to decrease the yield asymmetry between tension and compression in the extruded magnesium alloys.
Research advances of magnesium and magnesium alloys worldwide in 2021
Authors: Song Jiangfeng , Chen Jing , Xiong Xiaoming , Peng Xiaodong , Chen Daolun , Pan Fusheng
Published: August 2023

More than 4000 papers in the field of Mg and Mg alloys were published and indexed in Web of Science (WoS) Core Collection database in 2021. The bibliometric analyses indicate that the microstructure, mechanical properties, and corrosion of Mg alloys still are the main research focus. Mg ion batteries and hydrogen storage Mg materials have attracted much attention. Significant contributions to the research and development of magnesium alloys were made by Chongqing University, Shanghai Jiaotong University, and Chinese Academy of Sciences in China, Helmholtz Zentrum Hereon in Germany, Ohio State University in the United States, the University of Queensland in Australia, Kumanto University in Japan, and Seoul National University in Korea, University of Tehran in Iran, etc.. This review is aimed to summarize the progress in the development of structural and functional Mg and Mg alloys in 2021. Based on the issues and challenges identified here, some future research directions are suggested.
Microstructure and Electrochemical Behavior of a 3D-Printed Ti-6Al-4V Alloy
Authors: Yu Zhijun , Chen Zhuo , Qu Dongdong , Qu Shoujiang , Wang Hao , Zhao Fu , Zhang Chaoqun , Feng Aihan , Chen Daolun
Published: August 2023

3D printing (or more formally called additive manufacturing) has the potential to revolutionize the way objects are manufactured, ranging from critical applications such as aerospace components to medical devices, making the materials stronger, lighter and more durable than those manufactured via conventional methods. While the mechanical properties of Ti-6Al-4V parts manufactured with two major 3D printing techniques: selective laser melting (SLM) and electron beam melting (EBM), have been reported, it is unknown if the corrosion resistance of the 3D-printed parts is comparable to that of the alloy made with isothermal forging (ISF). The aim of this study was to identify the corrosion resistance and mechanisms of Ti-6Al-4V alloy manufactured by SLM, EBM and ISF via electrochemical corrosion tests in 3.5% NaCl solution, focusing on the effect of microstructures. It was observed that the equiaxed α + β microstructure in the ISF-manufactured Ti-6Al-4V alloy had a superior corrosion resistance to the acicular martensitic α′ + β and lamellar α + β microstructures of the 3D-printed samples via SLM and EBM, respectively. This was mainly due to the fact that (1) a higher amount of β phase was present in the ISF-manufactured sample, and (2) the fraction of phase interfaces was lower in the equiaxed α + β microstructure than in the acicular α′ + β and lamellar α + β microstructures, leading to fewer microgalvanic cells. The lower corrosion resistance of SLM-manufactured sample was also related to the higher strain energy and lower electrochemical potential induced by the presence of martensitic twins, resulting in faster anodic dissolution and higher corrosion rate.