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All Journal MATEMATIKA Eksergi: Jurnal Teknik Energi Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya
Munawwaroh, Dita Anies
Unknown Affiliation
Chemical Engineering, Chemistry & Bioengineering Education Electrical & Electronics Engineering Energy Engineering Mathematics Mechanical Engineering Social Sciences

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ANALISA KINERJA SISTEM KONTROL DISKRIT CHAOS LUP TERBUKA DAN TERTUTUP DENGAN PENGENDALI IMPULSIF Utomo, Robertus Heri Soelistyo; Widowati, Widowati; Munawwaroh, Dita Anies; Asnawi, Yuliyan Hambyah
MATEMATIKA Vol 20, No 1 (2017): JURNAL MATEMATIKA
Publisher : MATEMATIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1431.718 KB)

Abstract

tability the discrete chaotic systems is interesting to be discussed, given that chaos is closely related to random and irregular state. Stability of discrete chaotic system can be obtained using impulsive control law and applying Lyapunov stability theory. So it can show sufficient conditions for the design of impulsive controllers and  globally exponentially set-stable can be reached. Based on the results of the impulsive  control, it is seen that the behavior of chaos in a discrete chaos system which originally the trajectory are irregular, can be control and become stable, and there is a globally exponentially attracting set earned in the system. The numerical simulation on the discrete chaotic system is presented to illustrate the effectiveness of the obtained results from control impulsive.
PENERAPAN MESIN MIXER ADONAN BAKSO DAN SIOMAY (MEAT MINCER) UNTUK MENINGKATKAN PRODUKTIVITAS USAHA UMKM Alfauzi, Abdul Syukur; Herlambang, Yusuf Dewantoro; Sahid, Sahid; Munawwaroh, Dita Anies
Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Vol. 5 No. 1 (2024): Vol. 5 No. 1 April 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/sitechmas.v5i1.5148

Abstract

The Meat Mincer serves to stir the meatball and siomay dough, so that the siomay and meatball dough is mixed and chopped into soft and smooth and evenly mixed. The material inserted in the mixer machine is meat that has been ground with a meat grinder. In addition to dumplings, this dough mixer machine is also for other similar products that require the process of chopping and mixing dough, for example meatballs, sausages, tempurah, and various other dishes, this model meatball dough mixer machine is made of full stainless steel anti-rust. This machine is equipped with an ice cube collection tube around the container (mixer tube), this is very useful for the production process. The lid of this meatball and dumpling mixer machine is equipped with a hole on top. This hole is useful for viewing the dough mixing process, and is also useful for pouring meatball and siomay spices. The home industry partner of the siomay business is located in Meteseh Village, Tembalang District, Semarang City.Machine implementation includes assembling and installing the machine at the partner location, as well as training on machine operation and maintenance. The final stage of the service is evaluation and mentoring.   Evaluation is carried out by directly assessing the partners' operational practices on the machines that have been donated. Assistance includes supervision, work control, and direction when partners produce meatballs and dumplings using production machines. It is expected that the Meatball and Siomay Dough Mixer will be able to increase partner siomay production.
LQR of Periodic Review Perishable Inventory Systems for Radioisotope Luthesium-177 Munawwaroh, Dita Anies
Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya 2017: Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (616.7 KB)

Abstract

This research is about inventory system with periodic review policy. It will be controlled with linear quadratic regulator to keep the inventory level. This optimal control uses discrete time and has quadratic equation for objective function and linear equation for the constraint. The inventory system must be satisfy the assumption that it has single supplier, perishable goods, has a lead time, but the inventory system is not allowed lost sales. As a case study on simulation, the author will apply to optimize the inventory systems of radioisotope Luthesium-177. Because Luthesium-177 is a perishable goods that has a half-life 6,71 days. The uses of Luthesium-177 as cancer therapy to destroy cancer cells.
OPTIMALISASI ARAH SUDUT TILT DAN SUDUT AZIMUTH DARI ALAT PEMANEN ENERGI RADIASI MATAHARI DI SEMARANG, JAWA TENGAH Sutanto, Bayu; Herlambang, Yusuf Dewantoro; Bono, Bono; Alfauzi, Abdul Syukur; Munawwaroh, Dita Anies
Eksergi Vol. 17 No. 2 (2021): MEI 2021
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (776.751 KB) | DOI: 10.32497/eksergi.v17i2.2545

Abstract

Energi surya merupakan sumber energi terbarukan yang sangat optimal untuk dikembangkan dan telah menarik banyak perhatian baik dari para peneliti maupun pemerintahan. Penelitian ini bertujuan untuk mengidentifikasi sudut kemiringan (tilt/slope angle) dan orientasi arah (azimuth angle) dari suatu alat pemanen energi surya untuk mendapatkan nilai radiasi maksimum pada sepanjang tahun di daerah Semarang, Jawa Tengah. Lokasi yang digunakan sebagai basis data untuk menghitung arah sudut optimum ini dipilih di Politeknik Negeri Semarang yang berkoordinat di 7 °03'13.4" (7.053715 °) Lintang Selatan dan 110 °26'06.8" (110.435220 °) Bujur Timur. Metode perhitungan dari sudut-sudut matahari dan koordinat di bumi digunakan untuk mendapatkan nilai estimasi radiasi matahari. Hasil penelitian menunjukkan bahwa sudut kemiringan optimum sepanjang tahun berada pada kisaran 0 ”“ 30.14 ° dengan orientasi arah ke utara dan pada kisaran sudut kemiringan 0 ”“ 16.00 ° dengan orientasi arah ke selatan. Sedangkan untuk pemasangan menggunakan sudut konstan sepanjang tahun, nilai optimum dicapai pada sudut kemiringan 6.99 ° dengan orientasi menghadap ke utara.
Analysis of Hybrid System in the Photovoltaic and Photothermal Technology Sutanto, Bayu; Munawwaroh, Dita Anies; Bono, Bono; Herlambang, Yusuf Dewantoro; Sumarno, F Gatot; Alfauzi, Abdul Syukur
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.4191

Abstract

The utilisation and optimisation of solar energy have a vital role in reducing the global need for conventional fossil energy. Moreover, it is also clean and eco-environmentally energy resources. The photovoltaic-thermal (PV-T) hybrid system that combines photovoltaic and photothermal technology is an ideal solution for creating high-efficiency energy conversion devices. In addition, this system can be constructed to be small and compact with a higher economic value than the conventional technology from the previous solar energy harvesters. This paper will review the PV-T hybrid system and provide the thermodynamic analysis and the feasibility study.
Co-Authors Alfauzi, Abdul Syukur Asnawi, Yuliyan Hambyah Bono Bono F Gatot Sumarno, F Gatot Robertus Heri Sulistyo Utomo Sahid Sahid Sutanto, Bayu Yundari, Yundari Yusuf Dewantoro Herlambang