Article Per Year (5 Year)
p-Index From 2019 - 2024
2.679
P-Index
This Author published in this journals
All Journal Jurnal Karya Pendidikan Matematika Jurnal Matematika Sains dan Teknologi Desimal: Jurnal Matematika MUST: Journal of Mathematics Education, Science and Technology Mathvision : Jurnal Matematika Delta: Jurnal Ilmiah Pendidikan Matematika EAJ (ECONOMICS AND ACCOUNTING JOURNAL) Jurnal Saintika Unpam : Jurnal Sains dan Matematika Unpam Jurnal Statistika dan Matematika (Statmat) Indonesia Berdaya Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika
Nina Valentika
Universitas Pamulang
Agriculture, Biological Sciences & Forestry Arts Humanities Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Health Professions Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary Other

Published : 16 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 16 Documents
Search

 1   2 
ANALISIS HUBUNGAN EKSPOR, IMPOR, INFLASI DAN TINGKAT SUKU BUNGA TERHADAP KURS RUPIAH Yulianti Rusdiana; Nina Valentika; Ilmadi Ilmadi; Isnurani Isnurani
Delta: Jurnal Ilmiah Pendidikan Matematika Vol 9, No 2 (2021): Delta : Jurnal Ilmiah Pendidikan Matematika
Publisher : Universitas Pekalongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31941/delta.v9i2.1204

Abstract

Penelitian ini memodifikasi Penelitian Silitonga RBR et.al (2017) dengan menambahkan variabel suku bunga. Penelitian ini bertujuan untuk mengetahui hubungan ekspor, impor, inflasi, dan suku bunga terhadap nilai tukar rupiah di Indonesia. Analisis yang digunakan dalam penelitian ini adalah analisis regresi linier berganda. Periode data mulai dari Januari 2009 sampai dengan Desember 2019. Berdasarkan analisis regresi linier berganda, diperoleh bahwa tidak ada variabel yang signifikan memengaruhi kurs rupiah.
Implementation of Volatility Model in Modeling Relationship Between Share Trade Variables Nina Valentika; Hendro Waryanto
EAJ (Economic and Accounting Journal) Vol 4, No 2 (2021): EAJ (Economic and Accounting Journal)
Publisher : S1 Accounting Department, Faculty of Economic, Universitas Pamulang.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/eaj.v4i2.y2021.p104-110

Abstract

This study deals with the comparison of Generalized Autoregressive (GARCH) models and square returns in analyzing the relationships between stock trading variables. Stocks that have a statistically significant relationship between volume and volume return squared (volatility) cannot be grouped based on the average monthly market capitalization. Based on causal and contemporary models, it is indicated that intraday trading of LQ-45 stock samples is following the theory of the sequential information arrival hypothesis (SIAH) when using the quadratic return model. When viewed from a contemporary basis, this research uses the quadratic return volatility model following Valentika et.al (2017) research using the GARCH volatility model. If viewed from a causal basis, this research that uses the quadratic return volatility model conflicts with the Valentika et.al (2017) study using the GARCH volatility model.
ANALISIS PEMBENTUKAN PORTOFOLIO OPTIMAL SAHAM-SAHAM JAKARTA ISLAMIC INDEX (JII) PADA MASA PANDEMI COVID-19 Sri Istiyarti Uswatun Chasanah; Syarif Abdullah; Nina Valentika; Usfita Kiftiyani; Agusyarif Rezka Nuha
JURNAL SAINTIKA UNPAM Vol 3, No 1 (2020)
Publisher : Program Studi Matematika FMIPA Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jsmu.v3i1.5649

Abstract

Investment is the wealth of one or more assets in the hope of future benefits. Things to consider in investing are profit and risk. So investors need to diversify their investments, which means investors need to form a portfolio through the selection of several assets so that risk can be minimized without reducing expected profits. The COVID-19 pandemic period had a big impact on the economy, especially for investors in making optimal portfolio formation. This study aims to determine the optimal portfolio formation during the co-19 pandemic using the Single Index Model. The data used are data of consistent shares included in the Jakarta Islamic Index (JII) shares over the past two years. Furthermore, these stocks are chosen which have an average return that is higher than the profits obtained if investors save their money in the bank. The results showed six JII companies included in the candidate for optimal portfolio formation. After the analysis, two shares were produced, namely BRPT with a proportion of 63.8043% and EXCL 36.1957%. The proportion is expected to provide a profit of 1.57% per week and a risk of 6.06% per week. With the proportions obtained, an investment simulation was then carried out during the COVID-19 pandemic. The results of the simulation obtained a gain of 0.0771504% every week. These results are below the risk-free return of assets (SBIS) during the COVID-19-19 pandemic with an average profit of 0.087445% per week. It was concluded that optimal portfolio formation with the Single Index Model did not provide optimal benefits during the COVID-19 pandemic.
PENGEMBANGAN BAHAN AJAR KALKULUS BERBASIS MASALAH DENGAN BANTUAN SOFTWARE GRAPMATICA PADA MATERI SISTEM KOORDINAT KUTUB, TABUNG DAN BOLA I ilmadi; Nina Valentika; Gerry Sastro
Jurnal Karya Pendidikan Matematika Vol 7, No 2 (2020): Jurnal Karya Pendidikan Matematika Volume 7 Nomor 2 Tahun 2020
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/jkpm.7.2.2020.67-72

Abstract

The purpose of this study is to design teaching materials for Problem-based Calculus with the help of Grapmatica software in the Polar Coordinate System, Savings and Ball material, these teaching materials are implemented through valid, practical and effective learning modules. The methodology used in this study combines Plomp model research design with Gravemeijer & Cobb models. The stages of design research in this study were the preliminary research phase, the preparation of the experiment, the prototype development phase, the implementation of the experiment, the restrosfective analysis, and the assessment phase. Data analysis techniques in this research are descriptive statistics and descriptive techniques, which describe the validity, practicality and effectiveness of learning flow design through problem-based learning modules. Data collection instruments used: tests, observation sheets, interview sheets, questionnaires and field notes. The research subjects were 6th semester students of Mathematics Study Program FMIPA Univ. Pamulang who attended the Advanced Calculus lecture.The results of the validity data analysis show that the learning flow design is implemented through modules; Problem based learning that is produced has met the valid criteria. Said to be valid because it meets the characteristics of validity both in terms of content and construct. The contents of the learning design through the learning flow that are implemented in the learning module are guided by principles and are problem based. The context of the problems contained in the learning design is adapted to the context of student life and can bring students to do the mathematical process. The process of mathematics is one of the main focuses of this learning design, in order to train students to construct their own knowledge based on initial knowledge or experience. The learning flow design implemented through the learning module is practical because it is easy to use and understand, the allocation of time determined is efficient, interesting and contributes to learning in the Polar Coordinate System, Savings and Spheres. The learning flow design implemented through the learning module has also been effective because the use of this learning design has a potential impact on students' reasoning abilities on the topic of Polar, Savings and Ball Coordinate Systems. Based on these results, it can be concluded that the learning design of the topic of the Polar Coordinate System, Savings and Ball using Problem Based Calculus teaching materials with the help of grapmatica software on the material coordinate system of the lid, tubes and balls has been produced can be declared valid, practical and effective
PERHITUNGAN PELUANG BERTAHAN PERUSAHAAN ASURANSI DENGAN MENGGUNAKAN MODEL RESIKO KLASIK Nunung Kusdaniyama; Nina Valentika
STATMAT : JURNAL STATISTIKA DAN MATEMATIKA Vol 3, No 2 (2021)
Publisher : Math Program, Math and Science faculty, Pamulang University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/sm.v3i2.12553

Abstract

Perusahaan asuransi jiwa menetukan besarnya premi dan uang pertanggungan berdasarkan usia nasabah dan mengikuti tabel hayat. Dengan menetapkan besarnya peluang menerima total pendapatan premium dan membayarkan semua uang pertanggungan, yang dianggap memenuhi sebaran Poisson, peluang bertahan perusahaan asuransi jiwa dapat ditentukan setiap tahun, baik berdasarkan perhitungan per tahun maupun berdasarkan perhitungan secara akumulatif dari tahun-tahun sebelumnya. Hasilnya menunjukkan bahwa perusahaan asuransi jiwa berada dalam kondisi surplus sepanjang tahun, kecuali pada tahun pertama dan tahun-tahun terakhir untuk perusahaan yang hanya mempunyai nasabah dengan usia saat kontrak  (kasus-1). Beberapa cara mengurangi peluang kebangkrutan perusahaan asuransi jiwa yang dapat dilakukan adalah: memberikan tambahan biaya premi (kasus-2), menambahkan modal awal perusahaan (kasus-3), mengkombinasikan penambahan biaya premi dan penambahan modal (kasus-4, kasus-5 dan kasus-6) atau menambahkan jumlah nasabah dengan usia saat kontrak  (kasus-7).
PERAMALAN TINGKAT MORTALITAS, KEMATIAN DAN HIDUP DENGAN MENGGUNAKAN MODEL LEE-CARTER DAN GARCH Irfani Azis; Nina Valentika; Nunung Kusdaniyama; Dewi Purnama Sari
STATMAT : JURNAL STATISTIKA DAN MATEMATIKA Vol 3, No 2 (2021)
Publisher : Math Program, Math and Science faculty, Pamulang University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/sm.v3i2.9722

Abstract

Penelitian Aji et.al (2019) meramalkan menggunakan linear regresi, sedangkan dalam penelitian ini, penduga parameter menggunakan penelitian Aji et.al (2019) tetapi peramalan tingkat mortalitas, kematian dan hidup yang digunakan adalah GARCH(1,1). Nilai dugaan  dengan menggunakan GARCH(1,1) untuk periode 2015-2020 adalah sebesar -16,57575290, periode 2020-2025 adalah sebesar -19,19948176, periode 2025-2030 adalah sebesar -21,91136540, periode 2030-2035 adalah sebesar -24,71140382, periode 2035-2040 adalah sebesar -27,59959701, dan periode 2040-2045 adalah sebesar -30,57594498.
MODIFIKASI MODEL KONTEMPORER DAN KAUSALITAS ANTARA VOLUME PERDAGANGAN, BID-ASK SPREAD, RETURN SAHAM DAN VOLATILITAS RETURN (STUDI KASUS: INDEKS LQ-45) Nina Valentika
STATMAT : JURNAL STATISTIKA DAN MATEMATIKA Vol 1, No 1 (2019)
Publisher : Math Program, Math and Science faculty, Pamulang University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (242.706 KB) | DOI: 10.32493/sm.v1i1.2369

Abstract

Suatu variabel perdagangan saham mungkin dipengaruhi oleh variabel perdagangan saham lain pada periode yang sama, variabel perdagangan saham itu sendiri maupun variabel lainnya pada periode yang berbeda. Penelitian ini menyajikan modifikasi dari model Valentika N, Nugrahani E and Lesmana D (2017) pada data saham Indonesia dengan studi kasus LQ-45. Penelitian ini secara empiris menguji hubungan antara volume perdagangan, bid-ask spread dan return saham terhadap volatilitas return. Hasil regresi menunjukkan bahwa tidak cukup bukti untuk mendukung teori mixture of distribution hypothesis (MDH) pada pasar. Berdasarkan uji kausalitas Granger, terdapat dugaan bahwa perdagangan intraday sampel saham LQ-45 cenderung mengikuti teori MDH
PENERAPAN METODE HUNGARIAN DAN APLIKASI QM UNTUK MEMINIMALISASI KOMPLAIN KEBERSIHAN DARI KLIEN Epin Nur Cahya; Nina valentika; Isnurani; Siti Hadijah Hasanah
Jurnal Matematika Sains dan Teknologi Vol. 23 No. 1 (2022)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33830/jmst.v23i1.1425.2022

Abstract

An outsourcing company with a work contract period can run well if the work agreement made by the client is carried out properly. One of the things that affect the contract period is client complaints. By minimizing client complaints, the sustainability of work contracts between outsourcing companies and client companies is getting higher. For this reason, outsourcing companies assign workers based on the abilities of each worker so that the work results are optimal. One of the methods in solving assignment problems is the Hungarian method and the QM application. The purpose of this research is to minimize the value of hygiene complaints from clients. The results showed a reduction in the value of 15 client complaints from 43 complaints to 28 complaints related to the completion of the assignment of employees of outsourcing company using the Hungarian method and the QM application.
Pembahasan Soal Tes Potensi Skolastik pada SBMPTN 2020 untuk Meningkatkan Kualitas Pelayanan Online di Tengah Pandemi Covid 19 di Bimbel dan Privat MATRIKS Vivi Iswanti Nursyirwan; Nina Valentika; Choirul Basir; Gerry Sastro; Ilmadi Ilmadi
Indonesia Berdaya Vol 1, No 2: July 2020
Publisher : Utan Kayu Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ib.202029

Abstract

The purpose of community service carried out by the Pamulang University lecturer Team is to provide discussion assistance in answering questions about scholastic potential test to class XII high school students in preparing themselves to take part in the joint selection of state universities (SBMPTN) 2020. Partners in this community service are tutoring and private matrices in Pamulang, South Tangerang, Banten. The subject of community service is students in the public high school class XII who wish to enter state higher education through the SBMPTN 2020 test. The main problem faced by partners is that up to now Bimbel learning media has always been face to face and have never done online learning media, this because technologically Bimbel and private matrix not yet support in providing these services. The solution offered is to do online learning by online meeting application. The direct benefit of this dedication activity is an additional knowledge, skills in solving potential scholastic questions so that students can prepare for the joint selection of 2020 state universities with the method of solving problems quickly and easily. The derivate benefits are expected to be able to make students pass the SBMPTN 2020. This community service activity is carried out in the form of training by providing material and practice of completing the 2020 SBMPTN exam questions. The training is held for two weeks, namely in Monday to Friday, 11 -15  May 2020, and 18-22 May 2020. The method of activities used are practices, questions and answers and discussions. The analysis technique is done by observing aspects of student’s cognition and skills in conquering the subject matter.  
ANALISIS FAKTOR-FAKTOR YANG MEMPENGARUHI KUALITAS KERJA MAHASISWA PRAKTEK MENGGUNAKAN METODE ANALISIS FAKTOR DI CV. RAMA TEKNIK Jenita Aryanti Radjah; Aden; Ilmadi; Nina Valentika; Isnurani
Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Vol. 2 No. 1 (2021): Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistik
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/lb.v2i1.57

Abstract

Penelitian ini dilakukan untuk mengetahui faktor-faktor yang mempengaruhi kualitas kinerja Mahasiswa praktek di Cv. Rama Teknik dengan menggunakan metode Analisis Faktor. Kerja Praktek bagi Mahasiswa merupakan salah satu bagian terpenting untuk mengembangkan Ilmu Pengetahuan yang telah dapatkan dari pendidikan formal dalam Kampus. Tujuan Analisis faktor itu sendiri adalah untuk mereduksi sejumlah informasi dari variabel-variabel asli menjadi lebih kecil dengan tidak kehilangan informasi yang penting. Pengambilan data pada penelitian ini dilakukan dengan metode kuesioner terhadap 73 orang respoden di Cv. Rama Teknik yang kemudian datanya di Analisis dengan progam SPSS 24. Berdasarkan hasil penelitian analisis faktor ini, diperoleh 5 faktor yang mempengaruhi kualitas Kinerja Mahasiswa Praktek yaitu yang pertama :  faktor 1 (F1) memiliki nilai sebesar 0,561 (56,1%), faktor 2 (F2) sebesar 0,563 (56,3%), faktor 3 (F3) sebesar 0,604 (60,4%), faktor 4 (F4) sebesar 0,750 (75%) dan faktor 5 (F5) sebesar 0,557 (55,7%).
Co-Authors Aden Aden Aden Agusyarif Rezka Nuha Aswata Wisnuadji Choirul Basir Dewi Purnama Sari Epin Nur Cahya Fajri Ikhsan Gerry Sastro Hasanah, Siti Hadijah Hendro Waryanto I ilmadi I Made Sumertajaya Ilmadi Ilmadi Ilmadi Irfani Azis Isnurani Isnurani Isnurani Jenita Aryanti Radjah Miftahul Huda Muhamad Syazali Nunung Kusdaniyama Rusdiana, Yulianti Sidik Susilo Siti Aisyah Sri Istiyarti Uswatun Chasanah Sri Istiyarti Uswatun Chasanah Sunardi Sunardi Syarif Abdullah Tabah Heri Setiawan Usfita Kiftiyani Vivi Iswanti Nursyirwan Yazid Rukmayadi Yeyen Suratning