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Steganografi Citra Menggunakan Metode Least Significant Bit (LSB) dan Linear Congruential Generator (LCG) Andre Hernandes; Hartini Hartini; Dewi Sartika
JATISI (Jurnal Teknik Informatika dan Sistem Informasi) Vol 5 No 2 (2019): JATISI
Publisher : Lembaga Penelitian dan Pengabdian pada Masyarakat (LPPM) STMIK Global Informatika MDP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (454.432 KB) | DOI: 10.35957/jatisi.v5i2.134

Abstract

Steganography is a method used to hide secret messages from people who are not entitled to know it. In this study the author uses one of the steganography methods, the least significant bit method (LSB) to insert bits of secret message in the form of text into digital images RGB bitmap file extension, by combining the LSB method and linear congruential generator (LCG) to generate random numbers from the position of the pixel that will be inserted a secret message. The results of this study the authors managed to build steganography applications with the Java programming language and test the quality of stego image that produces an average value Peak Signal to Noise Ratio (PSNR) that reach 51 dB. From this assessment, it was concluded that stego image produced in good quality and did not experience significant changes.
KESULITAN BELAJAR MATEMATIKA DITINJAU DARI KEMAMPUAN PENALARAN MATEMATIS PADA SISWA KELAS VII SMP NEGERI 1 PAMUKAN SELATAN Radiatul Adawiah; Hartini Hartini
CENDEKIA: JURNAL ILMIAH PENDIDIKAN Vol 6 No 2 (2018): Cendekia: Jurnal Ilmiah Pendidikan
Publisher : STKIP Paris Barantai

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.996 KB) | DOI: 10.33659/cip.v6i2.107

Abstract

Abstract This research is a qualitative research that is descriptive, that is the data collected is not numbers, can be in the form of words or description of something. This study aims to describe student learning difficulties based on indicators of mathematical reasoning ability in class VII A SMP Pamukan Selatan 1. This research instrument is the researcher himself who is the main instrument, and the supporting instruments of this instrument are writing equipment, as well as handphones. Data collection techniques in this study include: 1) Observation (observation), 2) Test (Answering Questions), 3) Interview (Question and Answer) , 4) Documentation (supplementary data). This research instrument is the researcher himself who is the main instrument, and the supporting instruments of this instrument are writing equipment, as well as handphones. Data collection techniques in this study include 1) Observation (observation), 2) Test (Answering Questions), 3) Interview (Question and Answer), 4) Documentation (supplementary data). Based on the results of research Mathematics learning difficulties in terms of mathematical reasoning abilities. Subjects with high ability and moderate tend to use their mathematical reasoning skills in working on the problem, while low-ability subjects tend not to use their mathematical reasoning skills in working on questions. Based on the results of research Mathematics learning difficulties in terms of mathematical reasoning abilities. Subjects with high ability and moderate tend to use their mathematical reasoning skills in working on the problem, while low-ability subjects tend not to use their mathematical reasoning skills in working on questions. Keywords: Learning Difficulties, Mathematics , Reasoning Ability
Meningkatkan Hasil Belajar Matematika Melalui Pendekatan Contextual Teaching Learning (CTL) Materi Pecahan Kelas III MI AL MA’ARIF Kota Sorong Hartini Hartini
Jurnal Pendidikan Vol 5 No 2 (2017): Jurnal Pendidikan
Publisher : Universitas Pendidikan Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (398.459 KB) | DOI: 10.36232/pendidikan.v5i2.122

Abstract

Penelitian ini bertujuan untuk meningkatkan hasil belajar siswa kelas III MI AL-MA’ARIF Kota Sorong pada mata pelajaran Matematika dengan pokok Pecahan dengan menggunakan pendekatan Contextual Teaching Learning (CTL). Penelitian ini merupakan penelitian tindakan kelas kolaboratif. Subjek dalam penelitian ini siswa kelas III MI AL-MA’ARIF Kota Sorong Tahun Ajaran 2016/2017. Penelitian ini dengan menggunakan dua siklus, setiap siklus terdiri dari dua kali pertemuan Teknik pengumpulan data menggunakan tes, pengamatan (observasi), dokumentasi, dan catatan lapangan. Hasil penelitian menunjukkan bahwa : (1) Keterampilan guru dalam pembelajaran matematika melalui pendekatan CTL meningkat. Pada siklus I diperoleh rata-rata persentase 84% (baik). Pada siklus II mengalami peningkatan rata-rata persentase 93% (baik sekali). (2) Aktivitas siswa pada pembelajaran matematika melalui pendekatan CTL meningkat. Pada siklus I rata-rata persentase 70,5% (baik). Pada siklus II persentase aktivitas siswa menjadi 85,5% (baik sekali). (3) Hasil belajar siswa pada siklus I dan II mengalami peningkatan. Pada siklus I ketuntasan belajar klasikal 63% (cukup) dan meningkat pada siklus II menjadi 82% (baik). Hal ini menunjukkan bahwa persentase ketuntasan belajar klasikal pada siklus II > 75% sehingga dinyatakan berhasil. Simpulan dari penelitian ini adalah penerapan pendekatan CTL dapat meningkatkan kualitas pembelajaran matematika dengan menggunakan materi pecahan di MI AL-MA’ARIF Kota Sorong.
PENGARUH PROMOSI, PERSEPSI HARGA DAN KUALITAS PRODUK TERHADAP MINAT BELI DIGITAL CARD BY.U DI KOTA Hartini Hartini; Moh Afifulloh Syaekhun
Eqien - Jurnal Ekonomi dan Bisnis Vol 10 No 2 (2022): EQIEN - JURNAL EKONOMI DAN BISNIS
Publisher : Sekolah Tinggi Ilmu Ekonomi Dr Kh Ez Mutaqien

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (292.176 KB) | DOI: 10.34308/eqien.v10i2.609

Abstract

Given the scale of the use of data packets in Indonesia to add ourh great opportunities for telecommunications companies. Telkomsel as the largest internet service provider in Indonesia at the end of 2019 launched a new product called by.U which is now starting to be used by people in various regions, one of which is in the city of Sumbawa. The challenge for new products is to attract buying interest in these products, one of which is through promotion. Price strategy and product quality. This study aims to determine whether promotion, price perception and product quality affect the interest in buying digital cards by.U in the city of Sumbawa. Collecting data in this study using a questionnaire distributed to 100 respondents who were taken based on purposive sampling technique. The data were analyzed using descriptive quantitative analysis. The results showed that the independent variables of promotion, price perception and product quality had a partial effect on the dependent variable of interest in buying digital cards by.U in the city of Sumbawa
PERBEDAAN PENGARUH LATIHAN SENAM AEROBIK HIGH IMPACT DAN LOW IMPACT TERHADAP PENURUNAN PERSENTASE LEMAK TUBUH DITINJAU DARI BODY MASS INDEX (Studi Eksperimen pada Anggota Sanggar Senam Vira Watukelir Weru Sukoharjo) HARTINI HARTINI
Jurnal Ilmiah Spirit Vol. 12 No. 2 (2012): JURNAL ILMIAH SPIRIT
Publisher : Universitas Tunas Pembangunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jis.v12i2.159

Abstract

This research aims to find out: (1) the difference effect between of training aerobic gymnastics high impact and low impact on decrease in body fat percentage, (2) the difference of decrease in body fat percentage between the members of the shrine gymnastic with Body Mass Index (BMI) ≥ 25 and Body Mass Index (BMI) < 25, (3) the interaction effect between training aerobic gymnastics with Body Mass Index on decrease in body fat percentage.   This research employed an experimental method with 2 x 2 factorial design. The population of the research in the members of a shrine gymnastic Vira Watukelir Weru Sukoharjo. The sampling technique was purposive random sampling, the size of the samples taken are as much as 60 members of a shrine gymnastic. ANOVA was used to analyzing data, the data analysis prerequisite test was done using the sample normality test (Lilliefors test with α = 0.05%) and variance homogeneity test (Bartlett test with α = 0.05%).   Based on the result of the analysis, conclusions are drawn as follows: (1) There was difference between the effect of training aerobic gymnastics high impact and low impact on decrease in body fat percentage. The effect of training aerobic gymnastics high impact is higher than the training aerobic gymnastics low impact, (2) there was difference of decrease in body fat percentage between the members of the shrine gymnastic with Body Mass Index (BMI) ≥ 25 and Body Mass Index (BMI) < 25. The effect of decrease in body fat percentage between the members of the shrine gymnastic with Body Mass Index (BMI) ≥ 25 this higher than the one with Body Mass Index (BMI) < 25, (3) there was interaction effect between training aerobic gymnastics with Body Mass Index on decrease in body fat percentage. The members of the shrine gymnastic with Body Mass Index (BMI) ≥ 25 has according if it is training aerobic gymnastics high impact. While the members of the shrine gymnastic with Body Mass Index (BMI) < 25 has according if it is training aerobic gymnastics low impact.  
PERBEDAAN PENGARUH LATIHAN SENAM AEROBIK HIGH IMPACT DAN LOW IMPACT TERHADAP PENURUNAN PERSENTASE LEMAK TUBUH DITINJAU DARI STATUS GIZI (Studi Eksperimen pada Anggota Sanggar Senam Vira Watukelir Weru Sukoharjo) HARTINI HARTINI
Jurnal Ilmiah Spirit Vol. 15 No. 2 (2015): JURNAL ILMIAH SPIRIT
Publisher : Universitas Tunas Pembangunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jis.v15i2.336

Abstract

THE DIFFERENCE EFFECT OF TRAINING AEROBIC GYMNASTICS HIGH IMPACT AND LOW IMPACT ON DECREASE IN BODY FAT PERCENTAGE JUDGING FROM NUTRITION STATUS (Experimental Study on The Members of a Shrine Gymnastic Vira Watukelir Weru Sukoharjo). This research aims to find out: (1) the difference effect between of training aerobic gymnastics high impact and low impact on decrease in body fat percentage, (2) the difference of decrease in body fat percentage between the members of the shrine gymnastic with acceptable and obese nutrition status, (3) the interaction effect between training gymnastics with nutrition status on decrease in body fat percentage. This research employed an experimental method with 2 x 2 factorial design. The population of the research in the members of a shrine gymnastic Vira Watukelir Weru Sukoharjo. The sampling technique was purposive random sampling, the size of the samples taken are as much as 40 members of a shrine gymnastic. ANOVA was used to analyzing data, the data analysis prerequisite test was done using the sample normality test (Lilliefors test with α = 0.05%) and variance homogeneity test (Bartlett test with α = 0.05%). Based on the result of the analysis, conclusions are drawn as follows: (1) There was difference between the effect of training aerobic gymnastics high impact and low impact on decrease in body fat percentage. The effect of training aerobic gymnastics high impact is higher than the training aerobic gymnastics low impact, (2) there was difference of decrease in body fat percentage between the members of the shrine gymnastic with acceptable and obese nutrition status. The effect of decrease in body fat percentage between the members of the shrine gymnastic with acceptable nutrition status this higher than the one with obese nutrition status, (3) there was interaction effect between training gymnastics with nutrition status on decrease in body fat percentage. The members of the shrine gymnastic with acceptable nutrition status has according if it is training aerobic gymnastics high impact. The members of the shrine gymnastic with obese nutrition status has according if it is training aerobic gymnastics low impact.
PERBEDAAN PENGARUH LATIHAN SENAM AEROBIK HIGH IMPACT DAN LOW IMPACT TERHADAP PENURUNAN PERSENTASE LEMAK TUBUH DITINJAU DARI KEMAMPUAN GERAK (Studi Eksperimen pada Anggota Sanggar Senam Vira Watukelir Weru Sukoharjo) HARTINI HARTINI
Jurnal Ilmiah Spirit Vol. 15 No. 3 (2015): JURNAL ILMIAH SPIRIT
Publisher : Universitas Tunas Pembangunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jis.v15i3.338

Abstract

THE DIFFERENCE EFFECT OF TRAINING AEROBIC GYMNASTICS HIGH IMPACT AND LOW IMPACT ON DECREASE IN BODY FAT PERCENTAGE JUDGING FROM MOTOR ABILITY (Experimental Study on The Members of a Shrine Gymnastic Vira Watukelir Weru Sukoharjo). This research aims to find out: (1) the difference effect between of training aerobic gymnastics high impact and low impact on decrease in body fat percentage, (2) the difference of decrease in body fat percentage between the members of the shrine gymnastic with high and low motor ability, (3) the interaction effect between training gymnastics with motor ability on decrease in body fat percentage. This research employed an experimental method with 2 x 2 factorial design. The population of the research in the members of a shrine gymnastic Vira Watukelir Weru Sukoharjo. The sampling technique was purposive random sampling, the size of the samples taken are as much as 40 members of a shrine gymnastic. ANOVA was used to analyzing data, the data analysis prerequisite test was done using the sample normality test (Lilliefors test with α = 0.05%) and variance homogeneity test (Bartlett test with α = 0.05%). Based on the result of the analysis, conclusions are drawn as follows: (1) There was difference between the effect of training aerobic gymnastics high impact and low impact on decrease in body fat percentage. The effect of training aerobic gymnastics high impact is higher than the training aerobic gymnastics low impact, (2) there was difference of decrease in body fat percentage between the members of the shrine gymnastic with high and low motor ability. The effect of decrease in body fat percentage between the members of the shrine gymnastic with high motor ability this higher than the one with low motor ability, (3) there was interaction effect between training gymnastics with motor ability on decrease in body fat percentage. The members of the shrine gymnastic with high motor ability has according if it is training aerobic gymnastics high impact. The members of the shrine gymnastic with low motor ability has according if it is training aerobic gymnastics low impact.
PENGARUH LATIHAN SENAM AEROBIK LOW IMPACT TERHADAP PENURUNAN PERSENTASE LEMAK TUBUH DALAM MENUNJANG KUALITAS HIDUP LANSIA MASYARAKAT PEDESAAN HARTINI HARTINI
Jurnal Ilmiah Spirit Vol. 18 No. 2 (2018): JURNAL ILMIAH SPIRIT
Publisher : Universitas Tunas Pembangunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jis.v18i2.731

Abstract

Tujuan dari penelitian ini adalah untuk mengetahui seberapa besar pengaruh latihan low impact terhadap penurunan persentase lemak tubuh pada lansia dalam keberlangsungan peningkatan kualitas hidup, memperpanjang usia bahkan memperlambat kepikunan didaerah pedesaan. Sebagai instruktur ataupun pelatih senam pada sanggar, program latihan ini akan ditularkan kepada para annggota sanggar dan pelatih senam aerobik lainnya ditempat mereka melatih utamanya dikecamatan weru kabupaten Sukoharjo. Metode penelitian yang digunakan adalah penelitian eksperimen. Populasi dalam penelitian ini adalah lansia masyarakat pedesaan Kecamatan Weru Kabupaten Sukoharjo yang berjumlah 40 orang. Sampel yang digunakan dalam penelitian ini adalah semua populasi yaitu 40 orang. Teknik analisis data yang digunakan dalam penelitian ini adalah uji perbedaan (uji – t) dengan melalui uji persyaratan terlebih dahulu seperti uji reliabilitas, uji normalitas, dan uji homogenitas.`Hasil penelitian ini menunjukkan bahwa melalui penerapan pembelajaran program latihan instruktur dan program latihan peneliti  dalam menurunkan presentase lemak tubuh lansia khususnya yang berjenis kelamin perempuan masyarakat pedesaan Kecamatan Weru Kabupaten Sukoharjo tahun 2018. Penurunan prosentase lemak tubuh pada lansia berjenis kelamin perempuan melalui metode latihan dari instruktur sebesar 3.4%dengan program latihan yang diterapkan dari peneliti sebesar 10.6%. Setelah melakukan penelitian, diperoleh simpulan sebagai berikut: (1).Ada perbedaan pengaruh antara program latihan peneliti dan instruktur terhadap penurunan prosentase lemak tubuh dalam menunjang kualitas hidup lansia masyarakat pedesaan dengan nilai perhitungan thit sebesar 2.35,dan ttabel sebesar  1,72 pada taraf signifikasi 5%.(2).Program latihan senam aerobik low impact peneliti lebih baik pengaruhnya terhadap penurunan prosentase lemak tubuh dalam menunjang kualitas hidup lansia masyarakat pedesaan. Kelompok 1 (kelompok yang mendapat program latihan senam aerobik low impact peneliti) memiliki penurunan sebesar 10.6 %. Sedangkan kelompok 2 (kelompok yang mendapat program latihan senam aerobik low impact instruktur) memiliki penurunan sebesar 3.4 %  
PERBEDAAN PENGARUH STRATEGI CONTEXTUAL TEACHING AND LEARNINGDENGAN KONVENSIONALTERHADAP HASIL BELAJAR TENDANGAN SABIT PENCAK SILAT PADA SISWAKELAS XI IPA 4 SMA MUHAMMADIYAH 1 SRAGEN HARTINI HARTINI
Jurnal Ilmiah Spirit Vol. 17 No. 2 (2017): JURNAL ILMIAH SPIRIT
Publisher : Universitas Tunas Pembangunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jis.v17i2.937

Abstract

Tujuan Penelitian Ini Adalah Untuk Mengetahui:                                                                                     (1) Perbedaan Pengaruh Strategi Contextual Teaching Andlearning Dengan Konvensional Terhadap Hasil Belajar Tendangan Sabit Pencak Silat Pada Siswa Xi IPA 4 Sma Muhammadiyah 1 Sragen. (2) Latihan Yang Lebih Baik Pengaruhnya Antara Strategi Contextual Teaching And Learning Terhadap Hasil Belajar Tendangan Sabit Padas Iswaxi IPA 4 Sma Muhammadiyah 1sragen.Subyek Penelitian Di Bagi Menjadi Dua Kelompok Sebanyak 13 Orang Di Setiap Masing-Masing Kelompok. Dalam Penelitian Ini Dilakukan Perlakuan Selama 8 Minggu Dengan Frekuensi Latihan Seminggu Sekali. Kelompok 1 Mendapat Perlakuan Dengan Menggunakan Strategi Contextual Teaching And Learning, Sedangkan Kelompok 2 Menggunakan Strategi Konvensional. Teknik Pengumpulan Data Menggunakan Tes Dan Pengukuranya Itu Dengan Tes Pengukuran Menendang Tendangan Sabit Pencak Silat Yang Meliputi Tes Afektif, Kognitif Dan Psikomoor.Hasil Penelitian Ini Dapat Di Simpulkan Sebagai Berikut : (1) Ada Perbedaan Pengaruh Yang Signifikan Antara Strategi Contextual Teaching And Learning Dengan Konvensional Terhadap Hasil Belajar Tendangan Sabit Pencak Silat Pada Siswa XI IPA 4 Sma Muhammadiyah 1 Sragen. (2) Strategi Contextual Teaching And Learning Memiliki Pengaruh Yang Lebih Baik Dari Pada Strategi Konvensional Terhadap Hasil Belajar Tendangan Sabit Pencak Silat Xi IPA 4 Sma Muhammadiyah 1sragen.            Perbedaan Pengaruh Peningkatan Terhadap Hasil Belajar Tendangan Sabit Pencak Silat Pada Siswa XI IPA 4 Sma Muhammadiyah 1 Sragen.. Peningkatan Hasil Belajar Tendangan Sabit Pencak Silat Kelompok Eksperimen (Strategi Contextual Teaching And Learning) = 14,227%>Kelompok 2 (Strategikonvensional) = 8,615%
ANALISIS FAKTOR INTERNAL YANG MEMPENGARUHI PRESTASI BELAJAR MAHASISWA D-IV BIDAN PENDIDIK Vitria Ningsih; Hartini Hartini
Edudikara: Jurnal Pendidikan dan Pembelajaran Vol. 2 No. 4 (2017): December
Publisher : IPTPI Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/edudikara.v2i4.66

Abstract

Tujuan dari penelitian ini adalah mengetahui faktor internal yang berpengaruh terhadap prestasi belajar mahasiswa Prodi DIV Bidan Pendidik Universitas Respati Yogyakarta. Metode yang digunakan deskriptif analitik korelasional. Pengambilan sampel dengan menggunakan total sampling. Subyek penelitian adalah semua mahasiswa semester III Program Studi DIV Bidan Pendidik sejumlah 47. Instrumen penelitian menggunakan kuesioner dan uji statistik kendall tau. Hasil penelitian ini menunjukkan bahwa analisis minat terhadap prestasi belajar diperoleh p-value 0,031, motivasi terhadap prestasi belajar p-value 0,045, kecerdasan intelektual terhadap prestasi belajar p-value 0,048, kecerdasan emosional terhadap prestasi belajar p-value 0,003, kecerdasan spiritual terhadap prestasi belajar dengan p-value 0,640. Kesimpulannya faktor minat, motivasi, kecerdasan intelektual, dan kecerdasan emosional mempengaruhi prestasi belajar mahasiswa