IMPLEMENTASI METODE LEAST SIGNIFICANT BIT (LSB) DALAM TEKNIK STEGANOGRAFI PADA CITRA DIGITAL MENGGUNAKAN MATLAB

Penelitian ini mendokumentasikan implementasi metode Least Significant Bit (LSB) dalam steganografi pada citra digital menggunakan MATLAB. Penelitian bertujuan membuat program steganografi dengan metode LSB dan menganalisis efisiensinya berdasarkan PSNR, waktu proses, dan ukuran file. Fokusnya adalah pada gambar digital dalam format PNG32, menggunakan ASCII untuk teks, serta penerapan steganografi dalam menyembunyikan pesan pada media digital seperti gambar dan audio. Studi mencakup tabel hasil metode LSB pada berbagai file gambar, dengan perbandingan gambar stego pada jumlah teks tersembunyi yang berbeda. Artikel ini juga menyertakan daftar referensi untuk bacaan lebih lanjut. Sistem steganografi yang diusulkan mencakup fungsi encoding, decoding, tampilan gambar pada GUI, serta perhitungan PSNR dan MSE. Evaluasi dilakukan pada sepuluh file gambar dengan ukuran dan dimensi yang beragam, dicatat dalam tabel.Kode yang digunakan dijelaskan secara rinci, termasuk loop untuk mengubah piksel gambar dan penyimpanan teks dalam bentuk biner. Secara keseluruhan, proposal ini memberikan kajian komprehensif tentang implementasi dan evaluasi metode LSB dalam steganografi citra digital menggunakan MATLAB

INSTRUMEN RATIFIKASI PERJANJIAN PERDAGANGAN INTERNASIONAL: REZIM PUTUSAN MAHKAMAH KONSTITUSI NOMOR 13/PUU-XVI/2018

The intrusive character inherent in international trade agreements makes the particular form of the treaty unique compared to other treaties. The trade agreements' intrusiveness means the treaty impacts individual rights relatively more than other treaties on its implementation. Confirming such a particular character, the Indonesian Constitutional Court, via its Decision No. 13/PUU-XVI/2018, provides additional criteria for the treaty ratified through an act, in addition to the general forms of treaties. This study comprehensively discusses the consistency of the instrument form and the clarity of the reference regulations related to the procedure for ratifying the international trade agreement in Indonesia after the ruling of the 2018 Constitutional Court Decision. This study uses a normative juridical approach by making a library of data covering principles, laws, and regulations or legal theories relevant to research as the main material. The study shows that Constitutional Court Decision No. 13/PUU-XVI/2018 has allowed the international trade agreement to be ratified consistently using a legislative act replacing the past practice of using a presidential act. Moreover, the provisions on international trade agreements ratification under Indonesian trade law and Indonesian treaty law must be enforced using "lex specialis derogat lex generalis" principle. Although they share the same norms after the Constitutional Court's Decision 13/2018, specific provisions under the trade law prevail over the general provisions of the Indonesian treaty law

INSTRUMEN RATIFIKASI PERJANJIAN PERDAGANGAN INTERNASIONAL: REZIM PUTUSAN MAHKAMAH KONSTITUSI NOMOR 13/PUU-XVI/2018

The intrusive character inherent in international trade agreements makes the particular form of the treaty unique compared to other treaties. The trade agreements' intrusiveness means the treaty impacts individual rights relatively more than other treaties on its implementation. Confirming such a particular character, the Indonesian Constitutional Court, via its Decision No. 13/PUU-XVI/2018, provides additional criteria for the treaty ratified through an act, in addition to the general forms of treaties. This study comprehensively discusses the consistency of the instrument form and the clarity of the reference regulations related to the procedure for ratifying the international trade agreement in Indonesia after the ruling of the 2018 Constitutional Court Decision. This study uses a normative juridical approach by making a library of data covering principles, laws, and regulations or legal theories relevant to research as the main material. The study shows that Constitutional Court Decision No. 13/PUU-XVI/2018 has allowed the international trade agreement to be ratified consistently using a legislative act replacing the past practice of using a presidential act. Moreover, the provisions on international trade agreements ratification under Indonesian trade law and Indonesian treaty law must be enforced using "lex specialis derogat lex generalis" principle. Although they share the same norms after the Constitutional Court's Decision 13/2018, specific provisions under the trade law prevail over the general provisions of the Indonesian treaty law

PENGEMBANGAN BUMDES MAJU BERSAMA DALAM MENDUKUNG KESEJAHTERAAN MASYARAKAT DESA TUNJUNGTIRTO

Badan Usaha Milik Desa adalah salah satu kebijakan pemerintah yang bertujuan sebagai perkembangan dan kemajuan ekonomi masyarakat desa. Berdirinya BUMDes "Maju Bersama" Desa Tunjungtirto berkembang dengan baik, dengan adanya BUMDes masyarakat tunjungtirto sangat terbantu terutama masyarakat dalam membuka usaha dan berfokus pada peningkatan pendapatan yang ada di desa. Tujuan penelitian ini adalah untuk mengidentifikasi pengembangan BUMDes Maju Bersama yang di dalamnya terdapat banyak unit usaha. Metode Penelitian yang digunakan adalah kualitatif dengan desain penelitian deskriptif. Hasil penelitian ini menunjukkan bahwa untuk menjadikan dan menyatukan potensi yang ada dengan mendirikan badan usaha milik desa. Dapat disimpulkan bahwa BUMDes mampu mengembangkan perekonomian di masyarakat dengan usaha melalui beberapa unit yang didirikan oleh BUMDes agar melakukan pemasaran produk sehingga mengalami peningkatan dan mampu untuk mendukung kesejahteraan masyarakat di desa Tunjungtirto, Kecamatan Singosari, Kabupaten Malang

FOTODEGRADASI ZAT PEWARNA TEKSTIL (RHODAMIN B) MENGGUNAKAN ADSORBEN BERBASIS MATERIAL KOMPOSIT KALSIUM TITANATE (CATIO3)

Komposit nanopartikel kalsium titanate (CaTiO3) berhasil disintesis melalui metode solid-state dan proses kalsinasi menggunakan kalsium karbonat (CaCO3) dan titanium oksida (TiO2) anatase. Bahan awal ditetapkan dalam perbandingan molar CaCO3/TiO2 yakni (1:1), (1:5), dan (1:7). Kedua bahan campuran CaCO3 dan TiO2 dilarutkan dan dihomogenkan melalui pengadukan. Campuran larutan yang telah homogen, diendapkan, dikeringkan dan dikalsinasi menggunakan suhu 900oC. Morfologi dan sifat mikro struktural dari bahan CaTiO3 dikarakterisasi menggunakan scanning electron microscopy (SEM) dan analisis energy dispersive X-ray (EDX). Komposit nanopartikel CaTiO3 selanjutnya digunakan untuk fotodegradasi zat pewarna Rhodamine B (RhB) di bawah sinar lampu UV. Hasil investigasi menunjukkan bahwa mekanisme penyerapan (adsorbsi) RhB dan sifat fotokatalitik dari CaTiO3 sangat tergantung pada komposisi bahan awal. Studi kinetika menunjukkan bahwa aktivitas fotokatalitik reaksi CaTiO3 terhadap RhB mengikuti model kinetika orde pertama. Lebih lanjut, 100mg RhB dapat terdegradasi sebesar 97.37% 23.34% pada penggunaan komposisi CaTiO3 sebanyak 0.5 hingga 2.0g dalam waktu 40menit. Hasil penelitian menunjukkan bahwa fotokatalis berbasis komposit CaTiO3 sangat efektif dalam mendegradasi zat pewarna RhB. Hal ini dikaitkan dengan besarnya luas permukaan aktif katalis serta kemampuan menghasilkan ion radikal pendegradasi RhB dari proses pemisahan muatan.  Kata kunci: CaTiO3; fotodegradasi ; fotokatalisis ; pewarna tekstil ; rhodamine B DOI : https://doi.org/10.33005/jurnal_tekkim.v14i2.202

The Model of Community Stigma During the Covid-19 Pandemic Period in East Java Indonesia

Background: East Java Area is the epicentre of COVID-19 transmission with the largest number of cases and the highest death rate in Indonesia. This pandemic has created a stigma that can lessen the quality of life. This study was conducted to find a model of predictor factors that affect the stigma of society during the COVID-19 pandemic. Method: This study involved 322 respondents in East Java, Indonesia and used multivariate analysis with the PLS (Partial Least Square) method to determine the relationship between several variables. The studied variables were demographics (age, gender, educational level, and occupation), attitudes, knowledge, behaviour, stigma and acceptance. Result: Stigma since the COVID-19 pandemic outbreak was influenced by demographic, knowledge and behaviour factors, while the attitude variable in this study did not affect the occurrence of stigma. Knowledge aspect had a positive relationship with stigma. The higher the knowledge of the respondents in this study, the higher the tendency to produce stigma. Likewise for demographic variables. Meanwhile, behaviour aspect indicated a negative relationship. Conclusion: The factors that influence stigma, starting from the most powerful are behaviour, knowledge and demographics. This model is a recommendation for the government to improve the quality of life of the people and reduce the spread of COVID-19

PENGARUH CHESS GAME (PERMAINAN CATUR) TERHADAP PIKIRAN NYAMAN (KOGNITIF) PADA LANSIA DEMENSIA DI DESA KARANGGENENG KABUPATENLAMONGAN

Dementia is a part of neurodegenerative process that occur in elderly. Dementia caused by decrease in cognitive function.Playing game is one of activity that can be intervention for dementia in elderly. Chess game is the game that familiar in whole world and also in Karanggeneng, Lamongan. This study aim to analyze the effect of chess game to comfort mind (cognitive) at elderly with dementia. Design used in this study was quasy experimental study. Population in this study was elderly with dementia in Lamongan. The respondent in this study is 20 person, consist by 10 person in intervention group and 10 person in control group. Respondent selected through multi stage random sampling. The independent variable was chess game, and dependent variable was comfort mind (cognitive).Data were collected using MoCA-Ina questionnaires and analyzed using Paired T-Test and Independent T-Test with a significance level of α ≤ 0.05. The results showed that there was an influence of chess game to comfort mind (cognitive) at elderly with dementia in intervention group (p=0,000), and there wasn’t influence in control group (p=0,758). There was different level of comfort mind (cognitive) between intervention group and control group (p=0,008) It can be concluded that chess game can influence comfort mind (cognitive) in elderly with dementia. Further research was suggested to use chess game as one of alternative intervention for elderly with dementia