56 research outputs found
Subgradient methods for convex minimization
No full textThesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.Includes bibliographical references (p. 169-174).This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Many optimization problems arising in various applications require minimization of an objective cost function that is convex but not differentiable. Such a minimization arises, for example, in model construction, system identification, neural networks, pattern classification, and various assignment, scheduling, and allocation problems. To solve convex but not differentiable problems, we have to employ special methods that can work in the absence of differentiability, while taking the advantage of convexity and possibly other special structures that our minimization problem may possess. In this thesis, we propose and analyze some new methods that can solve convex (not necessarily differentiable) problems. In particular, we consider two classes of methods: incremental and variable metric.by Angelia NediÄ.Ph.D
Effect of Titanium Dioxide Addition to Heat Polymerized Acrylic Resin Denture Base on Surface Rougness and Color Stability
No full textHeat polymerized acrylic resin is a material that is often used as a denture base material in dentistry because it has the advantages of good aesthetics, small dimensional changes, non-toxicity, easy to obtain, easy to process, and relatively cheap price. However, besides that, heat polymerized acrylic resin also has disadvantages which have low mechanical and physical properties, so efforts are needed by adding a reinforcing material in the form of titanium dioxide (TiO2). The addition of titanium dioxide can improve the physical and mechanical properties, but the effect on other properties such as surface roughness and color stability of the heat polymerized acrylic resin denture base is not known. The design of this study was a experiment laboratory with a post test only control group design. The sample in this study was heat polymerized acrylic resin denture base with 4 groups is the group without the addition of titanium dioxide and the group with the addition of titanium dioxide with a concentration of 0.5%, 1%, and 1.5%. The sample size to be used for surface roughness testing according to ADA specifications No.12,1999 is 65 mm x 10 mm x 2.5 mm. The sample size to be used for color stability testing according to ADA Specification No.12,1999 is 35 mm x 15 mm x 0.5 mm. Testing of sample surface roughness was measured using a surface roughness tester while testing the color stability of samples was measured using a portable colorimeter CS-10. The average surface roughness value of the group without the addition of titanium dioxide and the group with the addition of titanium dioxide with concentrations of 0.5%, 1%, and 1.5% were 0.192 μm, 0.187 μm, 0.156 μm, 0.119 μm while the average values the average color stability of the group without the addition of titanium dioxide and the group with the addition
of titanium dioxide with concentrations of 0.5%, 1%, and 1.5% were 0 ΔE, 27.71 ΔE, 30.98 ΔE, 35, 41 ΔE. Data were analyzed using an independent T-test, and all group data obtained a p-value <0.05. This shows that there is a significant effect without and with the addition of titanium dioxide with a concentration of 0.5%, 1%, and 1.5% on the heat polymerized acrylic resin denture base on surface roughness and color stability. The conclusion of this study is the addition of titanium dioxide with concentrations of 0.5%, 1%, and 1.5% can affect surface roughness and color stability because it can decrease surface roughness to acceptable clinical limit values, but still consider the effect on color stability because it has exceeded the accepted clinical limit value, so the color denture base heat polymerized acrylic resin is unaesthetic.111 PagesSkripsi Sarjan
A Network Analysis of Online News Portal Discourse on the Change of Coach of the 2025 Indonesian National Football Team
No full textFan often show fanatical attitudes, which can lead to verbal aggression and increase the potential for the spread of various negative opinions. Many online news portals report diversity opinion One example of the diversity of opinion in football concerns the policies implemented by the PSSI in early 2025, particularly regarding the replacement of the Indonesian national team coach. This will use approach method mixed, but will more focused on approach qualitative with use method Analysis Discourse Network (DNA). Online news portal, or The actors involved can certainly play a significant role in disseminating discourse. Therefore, this study aims to understand how discourse networks and actor networks are formed. The research method used involves utilizing Discourse Network Analyzer (DNA) and Visone by analyzing 55 articles. online news. The results showed that there were 292 statements, and 30 organizations were involved, with 55 individual actors participating. Furthermore, it should be noted that in the topic of changing the coach of the Indonesian national football team, there were pro and con groups. The discourse of support for the new coach had the highest centrality, namely 11.066%. Furthermore, Hadrian Irfani, Deputy Chairman of Commission X of the House of Representatives, was the actor with the highest contribution in this topic, with score centrality degrees by 2.869%
PENGENAAN KEWAJIBAN PAJAK DAERAH DAN PPH 23 ATAS JASA KATERING DI RSUD R. SYAMSUDIN S.H.
No full textThis Final Project Report was prepared by Angelia Rachel Aiena, Student
Identification Number 2041211011, with the title “IMPOSITION OF LOCAL
TAX OBLIGATIONS AND INCOME TAX 23 ON CATERING SERVICES AT
RSUD R. SYAMSUDIN S.H.” This report is prepared based on the results of
research conducted by the author at RSUD R. Syamsudin S.H. Prior to the issuance
of Law No. 28/2009, catering services were included in the Value Added Tax object.
After the issuance of the Act, catering services have been excluded from the object
of Value Added Tax and are subject to the object of Regional Tax in accordance
with the provisions of Law No. 1 of 2022 concerning Financial Relations between
the Central Government and Regional Governments and are subject to Income Tax
23 in accordance with the provisions of PMK No. 141/PMK.03/2015 concerning
Other types of services as referred to in Article 23 Paragraph (1) Letter C Number
2 of Law Number 7 of 1983 concerning Income Tax. The purpose of this research
is to find out how tax imposition, tax calculation and constraints on eating and
drinking in hospitals. The research method used in this research is a qualitative
research method with a descriptive method so that the results of this research are
based on direct observation through sources with interview, observation, and
documentation methods to find out how the imposition of local taxes and income
tax 23 on catering services at RSUD. R Syamsudin S.H and its constraints and
solutions. As PMK No. 141/PMK.03/2015 explains that Catering Services are
subject to an Income Tax 23 rate of 2% of the gross amount and are subject to local
tax rates as referred to in Law No. 1 of 2022 of 10% of the Tax Imposition Base
(DPP). The results of research at RSUD R. Syamsudin S.H in the imposition of local
tax obligations and Income Tax 23 on catering services are in accordance with
these regulations
Analysis of Generation Z Communication Identity in Novo Club Online Community Members
No full textGeneration z in Indonesia has a high interest in joining online communities or groups. Through online communities, Generation Z can interact via digital media or directly with people who have similar interests. So, it will be easier for them to show their identity. However, there are several irresponsible parties who take advantage of Generation Z's enthusiasm by exploiting their creative ideas. In this way, there is a potential that the identity that one wants to show and develop cannot be achieved. Therefore, it is important for a community to support generation z in forming the identity that its members want. This research aims to analyze the communication identity of Generation Z who are members of the Novo Club online community. The research method used is a qualitative approach using interviews and observation as data collection methods. The research results show that the communication identity that Novo Club members want to show is very diverse, including being an innovator, and in accordance with the positive characteristics of Generation Z. They show their identity through social media or in person, through their style of speaking and dressing
The relationship between attributional style and depression, 1991
No full textThe purpose of this research was to determine whether a relationship existed between an individual's attributional style and the presence of depression. Attributions! style was measured across three dimensions: (1) internal verses external causality, (2) stable verses temporary causality, and (3) global verses domain specific causality. In addition to the Attributional Style Questionnaire, the Beck Depression Inventory and the Generalized Contentment Scale were given to 65 participants, 30 depressed and 35 nondepressed. This research found support for depressed individual's possessing a different attributional style from nondepressed subjects when they perceived themselves to have no control over the stressful life events
Controlling exposure to As and Cd from rice via irrigation management
No full textThis article was originally published in Environmental Geochemistry and Health. The version of record is available at: https://doi.org/10.1007/s10653-024-02116-x. © The Author(s) 2024
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
This research was featured in UDaily on 08/30/2024 at https://www.udel.edu/udaily/2024/august/toxic-metal-leafy-greens-rice-research-angelia-seyfferth-matt-limmer/Irrigation management controls biogeochemical cycles in rice production. Under flooded paddy conditions, arsenic becomes plant-available as iron-reducing conditions ensue, while oxic conditions lead to increased plant availability of Cd in acidic soils. Because Cd enters rice through Mn transporters, we hypothesized that irrigation resulting in intermediate redox could simultaneously limit both As and Cd in rice grain due to As retention in soil and Mn competition for Cd uptake. In a 2 year field study, we used 6 irrigation managements that varied in extent and frequency of inundation, and we observed strong effects of irrigation management on porewater chemistry, soil redox potentials, plant As and Cd concentrations, plant nutrient concentrations, and methane emissions. Plant As decreased with drier irrigation management, but in the grain this effect was stronger for organic As than for inorganic As. Grain organic As, but not inorganic As, was strongly and positively correlated with cumulative methane emissions. Conversely, plant Cd increased under more aerobic irrigation management and grain Cd was negatively correlated with porewater Mn. A hazard index approach showed that in the tested soil with low levels of As and Cd (5.4 and 0.072 mg/kg, respectively), irrigation management could not simultaneously decrease grain As and Cd. Many soil properties, such as reducible As, available Cd, soil pH, available S, and soil organic matter should be considered when attempting to optimize irrigation management when the goal is decreasing the risk of As and Cd in rice grain.This work was funded by the National Science Foundation (grant #1930806)
The Role of Village Apparatuses in Preserving Toga Plants in Linung Bulen II Village, Bintang District, Central Aceh Regency
No full text61 HalamanSkripsi ini berjudul : “Peran Aparatur Desa Guna Melestarikan Tanaman Toga di Kampung Linung Bulen ll Kecamatan Bintang Kabupaten Aceh Tenah” skripsi ini di tulis oleh Bunge Niate, Npm 178510020, Prodi Ilmu Pemerintahan Fakultas Ilmu Sosila dan Ilmu Politik, Universitas Medan Area. Latar belakang penulis melakukan penelitian ini dari permasalah yang ada ditemui dilokasi penelitian yaitu bagaimana peran aparatur desa guna melestarikan tanaman toga di Kampung Linung Bulen ll Kecamatan Bintang Kabupaten Aceh Tengah dan kendala apa yang dihadapi aparatur desa dalam melestarikan tanaman toga. Kemudian penelitian ini bertujuan untuk mengetahui seperti apa peranan aparatur desa dalam melestarikan tanaman toga dan untuk mengetahui apa saja kendala yang dihadapi aparatur desa dalam pelestarian tanaman toga di Kampung Linung Bulen ll Kecamatan Bintang Kabupaten Aceh Tengah. Penelitian yang penulis lakukan disini adalah penelitian dengan menggunakan pendekatan kualitatif. Penelitian ini penulis lakukan di Kampung Linung Bulen ll Kecamatan Bintang Kabupaten Aceh Tengah dan informan dalam penelitian ini adalah kepala desa, aparatur desa dan masyarakat. Dalam pengumpulan data yang dibutuhkan, penulis menggunakan teknik wawancara, observasi dan dokumentasi. Dari hasil penelitian yang dilakukan penulis tentang peran aparatur desa guna melestarikan tanaman toga di Kampung Linung Bulen ll Kecamatan Bintang Kabupaten Aceh Tengah menunjukkan bahwa, peran aparatur Desa guna melestarikan tanaman toga masih kurang baik atau kurang terlaksananya peranan aparatur desa dalam program kegiatan tanaman Toga. Hal tersebut dapat dibuktikan dengan berbagai masalah yang dijumpai dalam kegiatan Tanaman Toga. Salah satunya ialah kurangnya partisifasi masyarakat dan peran aparatur desa dalam kegiatan tanaman toga serta terkendalanya faktor anggaran tentang program toga. this thesisi entitled the role of village officials to preserve the toga plant in the Kmpung Linung Bulen ll Kecamatan Bintang Kabupaten Aceh Tengah. This thesis was written by Bunge Niate Npm 178510020., government science study program facually of social and political University Medan Area. The background of the author doing this research is based on the problems encountered at the research site, namely how is the role of village officials in preserving the toga plan in Kampung linung Bulen ll Kecamatan Bintang Kabupaten Aceh Tengah and what obstacles are faced by the village apparatus in preserving the toga plant then this study aims to find out what the role of village apparatus is in preserving the toga plant and find out what are the obstacles faced by the village apparatus in preserving the toga plant in Kampung Linung Bulen ll Kecamatan Bintang Kabupaten Aceh Tengah the research that the author is doing here is a research using a qualitative approach. This research the author does this in Kampung Linung Bulen ll Kecamatan Bintang Kabupaten Aceh Tengah and informants in this study the village head of the village apparatus and the community in collecting the data needed by the authors used observation and documentation interview techniques.From the results of research conducted by the author on the role of village officials in preserving the toga plan in Kampung Linung Bulen ll Kecamatan Bintang Kabupaten Aceh Tengah. Shows that the role of the village apparatus in preserving the toga plant is still not good or the role of the village apparatus in the toga plant activity program is not implemented, this can be proven by the various problems encountered in the toga plant activity, one of them is the lack of community participation and the role of village officials in toga plant activities along with constraints on budget factors regarding the toga program
The Role of the Sirambas Village Government, Mandailing Natal Regency in Improving the Community's Economy from the Sampuraga Tourism Object
No full text73 HalamanDesa Sirambas berada di Kecamatan Panyabungan Barat, Kabupaten Mandailing Natal. Sebagian besar masyarakatnya bekerja sebagai petani dan masyarakatnya juga masih banyak yang pengangguran. oleh karena itu dengan adanya objek wisata sampuraga ini dan di didalam objek wisata sampuraga ini juga terdapat hal yang menarik seperti air panas sampuraga yang dapat dikatakan sudah melegenda dan bahkan sudah terkenal di berbagai negara. terdapat beberapa titik sumber air panas yang didalamnya bisa merebus jagung dan telur sampe matang, teraphy batu yang dapat mengeluarkan uap dari pori-pori batu yang dapat menghilangkan virus yang ada di tubuh. tentu sebuah kesempatan yang sangat besar bagi pemerintah desa sirambas dalam membuka lapangan pekerjaan bagi masyarakat yaitu dari objek wisata sampuraga tersebut. Dalam penelitian ini Penulis tertarik karena adanya bentuk kepedulian atau peran pemerintah desa didalamnya. penulis menggunakan teori peran dari Santosa, Arimbi, dan Horoepoetri yaitu kebijakan, strategi, dan komunikasi untuk mengetahui sejauh mana peran pemerintah desa sirambas kabupaten mandailing natal dalam meningkatkan perekonomian masyarakat dari objek wisata sampuraga. penelitian ini menggunakan metode deskriptif kualitatif melalui teknik wawancara, observasi dan dokumentasi. Hasil penelitian ini bahwa peran pemerintah desa sirambas Kabupaten Mandailing Natal melakukan sosialisasi kepada masyarakat, sosialisasi kepada dinas pariwisata, mengajak masyarakat untuk membuka usaha, mengelola tempat parkir, dan kebersihan lingkungan ditempat wisata sampuraga tersebut. faktor penghambat pemerintah desa Sirambas kabupaten Mandailing Natal dalam meningkatkan perekonomian masyarakat dari objek wisata Sampuraga yaitu rendahnya sumber daya manusianya dan kepedulian masyarakatnya juga masih rendah. Sirambas Village is located in West Panyabungan District, Mandailing Natal Regency. Most of the people work as farmers and there are still many people who are unemployed. Therefore, with the existence of this Sampuraga tourist attraction and in this Sampuraga tourist attraction there are also interesting things such as Sampuraga hot water which can be said to be legendary and even famous in various countries. there are several points of hot springs in which you can boil corn and eggs until cooked, stone therapy that can remove steam from the stone pores which can eliminate viruses in the body. certainly a very big opportunity for the Sirambas village government in opening up jobs for the community, namely from the Sampuraga tourist attraction. In this study the author is interested because of the form of concern or the role of the village government in it. The author uses the role theory of Santosa, Arimbi, and Horoepoetri namely policy, strategy, and communication to determine the extent of the role of the Sirambas village government, Mandailing Natal district in improving the community's economy from the Sampuraga tourist attraction. This study uses a qualitative descriptive method through interview, observation and documentation techniques. The results of this study indicate that the role of the Sirambas village government, Mandailing Natal Regency, is to socialize to the community, socialize to the tourism office, invites people to open businesses, manage parking lots, and clean the environment at the Sampuraga tourist site. The inhibiting factor for the Sirambas village government, Mandailing Natal district in improving the community's economy from the Sampuraga tourist attraction, is the low level of human resources and low community awareness
A Distributed Augmented Lagrangian Method over Stochastic Networks for Economic Dispatch of Large-Scale Energy Systems
No full textIn this paper, we propose a distributed model predictive control (MPC) scheme for economic dispatch of energy systems with a large number of active components. The scheme uses a distributed optimization algorithm that works over random communication networks and asynchronous updates, implying the resiliency of the proposed scheme with respect to communication problems, such as link failures, data packet drops, and delays. The distributed optimization algorithm is based on the augmented Lagrangian approach, where the dual of the considered convex economic dispatch problem is solved. Furthermore, in order to improve the convergence speed of the algorithm, we adapt Nesterov's accelerated gradient method and apply the warm start method to initialize the variables. We show through numerical simulations of a well-known case study the performance of the proposed scheme.Accepted Author ManuscriptTeam Bart De Schutte
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