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2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Agustinus Dermawan

For many Christian believers, especially whose family members suffer a prolonged sickness or multiple disease complications, it is often perplexing for them that God seems delaying to answer their prayers. And in many cases, God seems to let those family members to die. How could it be understood? That is not an easy problem to digest for many believers, especially if they think they already serve God in ministry, or churches, or other occasions. Fortunately, there are also comforting words to encourage us in such a perplexing situation, such as Romans 8:26-27, which suggests that the Holy Spirit also do intercession prayers for believers. And these two verses were followed by verse 8:28, where St. Paul concluded that from the previous two verses, we know that God works through everything for good to them that love God. Probably, that is the origin of a famous phrase: “God works often in mysterious ways.” This reflective article is intended to shed light on this old question


2021 ◽  
Vol 17 (3) ◽  
pp. 1-28
Author(s):  
Aviv Nachman ◽  
Sarai Sheinvald ◽  
Ariel Kolikant ◽  
Gala Yadgar

Deduplication decreases the physical occupancy of files in a storage volume by removing duplicate copies of data chunks, but creates data-sharing dependencies that complicate standard storage management tasks. Specifically, data migration plans must consider the dependencies between files that are remapped to new volumes and files that are not. Thus far, only greedy approaches have been suggested for constructing such plans, and it is unclear how they compare to one another and how much they can be improved. We set to bridge this gap for seeding —migration in which the target volume is initially empty. We prove that even this basic instance of data migration is NP-hard in the presence of deduplication. We then present GoSeed, a formulation of seeding as an integer linear programming (ILP) problem, and three acceleration methods for applying it to real-sized storage volumes. Our experimental evaluation shows that, while the greedy approaches perform well on “easy” problem instances, the cost of their solution can be significantly higher than that of GoSeed’s solution on “hard” instances, for which they are sometimes unable to find a solution at all.


2021 ◽  
Vol 410 ◽  
pp. 489-494
Author(s):  
Ivan S. Safronov ◽  
Aleksandra A. Neplueva ◽  
Ivan V. Ushakov

The ability to control the mechanical properties of metal alloys is an urgent task in materials science. For formation of certain operational properties, in most cases, it is enough to treat the working surface of the product by laser radiation. Classical processing methods are ineffective in relation to multicomponent amorphous-nanocrystalline metallic alloys. This is due to their limited use. Usually, this treatment leads to the loss of unique properties the amorphous-nanocrystalline material. Increasing crack resistance and microhardness is not an easy problem. The structure of an amorphous nanocrystalline material can be destroyed under the action of laser processing. Laser nanosecond treatment, as result of a complex effect on the surface, slightly affects the structure of material. The treated material is characterized by increased microhardness and crack resistance, while at the same time such changes may be controlled.


Author(s):  
Trương Xuân Quang ◽  
Lâm Dần Long ◽  
Nhờ Văn NGUYỄN

This paper studies and compare the performances of different control strategies of 3-phase active rectifier under different load and frequency conditions. There are three main control approaches to be investigated such as: Voltage Oriented Control (VOC), Direct Power Control (DPC) and Model Predictive Control (MPC). The traditional method VOC has been used widely in practice. Its control principle is available to many different grid-connected converter systems such as electric drive system, renewable energy conversion system. However, the problem of optimal design of the current regulators for the different operating conditions of the system is not an easy problem. The DPC and MPC methods then help to eliminate the disadvantages of the VOC. The MPC method has been now become much interesting since it offers a general solution to a multi-goal optimization problem. In the paper, the system structures and controller parameters are briefly presented. The main evaluation factors of the active rectifier are low input current distortion (THD), a unit input power factor and stable DC output voltage. Three methods are analyzed and verified using MATLAB software and measuring experiment on a real model. The obtained results show that the VOC method achieves stable quality under different load as well as the switching frequency conditions, while the MPC method may achieve good quality with a rather high switching frequency.


2021 ◽  
Vol 1 (1) ◽  
pp. 45-53
Author(s):  
Tania Puspa Chandra ◽  
Triastono Imam Prasetyo ◽  
Agung

2013 curriculum is a competency-based curriculum. An evaluation instrument is used to measure the students" competence in the learning. The evaluation instruments developed in this research were 34 multiple choice guestions with a single answer from 5 answer choices, guestions with description answer, and 3 performance assessments. The multiple choice guestion with a single answer refers to the guestion's indicator that developed from the competency's indicator. Basic competency is a reference for the formulation of competeney's indicators. Performance assessment refers to basic competencies. The objectives of the research are: 1) develop the multiple choice guestions with a single answer of basic competencies 3.4, 3.5, and 3.6, 2) develop the performance assessment of basic competencies 4.4. 4.5, and 4.6. The research used ADDIE research model which consists of 5 stages (1) analysis, (2) planning, 3) development, (4) implementation, (5) evaluation. Data collection is obtained from logical validation by evaluation experts, material experts, and field experts, and empirical validation which includes difTiculty level, diflerentiation, reliability and distractor analysis. The result of the research is the multiple choice guestions with a single answer is known that the validity of the guestions'construct is compatible with the guestion's indicator. As for the validity of the content, known that the test material is compatible with the guestion's indicator, Empirical validation Of results on the small group trials results on multiple choice guestions with a single answer to the dificulty level obtained the ratio of easy problem-moderate-difficult to achieve 4:4:2, the diflerenee is obtained the largest percentage of 52,95”4 good category. For the analysis of distractor, he choice of answers outwit percentage is 41.1796. In addition, revisions were made for small group trials, Results of large group test product of difficulty level obtained the ratio of easy problem:medium:difficult to reach 4:4:2. Different power obtained the largest percentage of 41.17 percent good category. Reliability is very high that is 0.855, For the analysis of distractor, the choice of answers outwit percentage is 82.36 percent. Revisions are also made based on empirical empirical analysis results of large groups. Kurikulum 2013 merupakan kurikulum berbasis kompetensi. Untuk mengukur kompetensi siswa dalam pembelajaran digunakan instrumen evaluasi. Instrumen evaluasi yang dikembangkan dalam penelitian ini adalah 34 soal pilihan ganda jawaban tunggal dengan $ pilihan jawaban, soal uraian dan 3 asesmen kinerja. Soal pilihan ganda jawaban tunggal mengacu pada indikator soal yang dikembangkan dari indikator kompetensi. Kompetensi dasar merupakan acuan perumusan indicator kompetensi. Asesmen kinerja mengacu pada kompetensi dasar. Tujuan penelitian yaitu: 1) merumuskan soal pilihan ganda jawaban tunggal dari kompetensi dasar 34, 35, dan 3.6, (2) merumuskan asesmen kinerja dari kompetensi dasar 4.4, 4.5 dan 4,6. Model penelitian menggunakan ADDIE yang terdiri dari 5 tahap yaitu: (1) analisis, (2) perencanaan, (3) pengembangan, (4) implementasi, (5) evaluasi. Pengumpulan data diperoleh dari hasil validitas logis oleh ahli evaluasi, ahli materi, dan ahli lapangan, dan validitas empiris meliputi tingkat kesukaran, daya beda, reliabilitas dan analisis pengecoh. Hasil penelitian yaitu soal pilihan ganda jawaban tunggal diketahui validitas konstruk soal sudah sesuai dengan indikator soal, validitas isi diketahui materi tes sesuai dengan indikator soal. Hasil validitas empiris pada uji coba kelompok kecil soal pilihan ganda jawaban tunggal untuk tingkat kesukaran diperoleh rasio soal mudah-sedang:sukar mencapai 4:4:2, daya beda diperoleh persentase terbesar yaitu 52,956 kategori baik. Analisis pengecoh berfungsi sebanyak 41,1796. Berdasarkan uji coba kelompok kecil dilakukan revisi. Setelah dilakukan validitas logis dan empiris dilakukan revisi untuk digunakan uji coba kelompok besar. Hasil uji coba kelompok besar tingkat kesukaran soal diperoleh rasio soal mudahssedangssukar mencapai 4:4:2. Daya beda diperoleh persentase terbesar 41,1796 kategori baik. Reliabilitas tergolong sangat tinggi yaitu 0,855, Analisis pengecoh berfungsi sebanyak 82,366. Revisi dilakukan berdasarkan hasil analisis validasi empiris kelompok besar.


2020 ◽  
Vol 3 (2) ◽  
pp. 99-115
Author(s):  
Hariyanto Hariyanto

This article aims to examines the implementation of government affairs. So that it excludes regi­ons to get involved directly and independently in order to manage and fight for the interests of the­ir regions. Therefore, the issue of authority relations is related to how to determine the house­hold affairs of the autonomous regions. Thus, the effort to find the ideal form of relationship between the center and the regions within the framework of a unitary state is not an easy problem to find. However, in the author's perspective, the relative autonomy model is a better choice of models to create a pattern of authority relations between the central government and regional governments


In this work we aim to illustrate some mathematical methods recently appeared in the scientific literature to detect fake news. The problem of fake news is an increasingly present topic in our society, from public debate to scientific research. The number of fake news produced is constantly increasing especially for the advantages of those who spread them. In fact, emotionally compelling news, in line with our thoughts, capture our attention, and lead to clicks and views, in the hope of attracting advertising. Understanding whether a news is false or not is not an easy problem to solve, given the large amount of data present on the internet. The detection mechanism should predict the information very quickly in order to stop the spread of fake news. This work is a review of four methods to detect fake news recently appeared in the literature [22, 33, 39, 47]. Different methodologies are observed among the various methods: statistical approach, artificial neural network, artificial intelligence and text approach. Furthermore, some results are shown.


Author(s):  
Paola Salusso ◽  
Valentina Testa ◽  
Sylvie Mochet ◽  
Alberto Arezzo ◽  
Marco Ettore Allaix ◽  
...  

BACKGROUND: Hemorrhoids are a common disease, that is often considered an easy problem to solve. Unfortunately, some particular clinical conditions, including Inflammatory Bowel Diseases (IBD), pregnancy, coagulophaties, immunosuppression, cirrhosis with portal hypertension, and proctitis after radiotherapy, challenge the hemorrhoids management and the outcomes. METHODS: Research and online contents related to hemorrhoids’ treatment in special conditions is reviewed in order to help colorectal surgeons in daily practice. RESULTS : There are very limited data about the outcomes of hemorrhoids treatment in these subgroups of patients. Patients in pregnancy can be effectively treated with medical therapy, reserving surgical intervention in highly selected and urgent cases. In case of thrombosed haemorrhoids, the excision allows a fast symptoms’ resolution, with a low incidence of recurrence, and a long remission interval. In case of immunosuppressed patients, there is no consensus for the best treatment, even if in most HIV positive patients a surgical procedure can be safely proposed when indicated. There are no sufficient data un literature related to transplanted patients. The surgical treatment of hemorrhoids in patients with IBD, especially Crohn’s Disease, can be unsafe, although there is a paucity of literature on this topic. In case of previous pelvic radiotherapy, it must always be considered that severe complications, like abscesses and fistulas with subsequent pelvic and retroperitoneal sepsis can occur after surgical treatment of hemorrhoids, so a conservative treatment is advocated. Moreover, caution is recommended in treating patients with coagulopathy, considering possible complications (mostly bleeding) also after outpatient treatments. In case of portal hypertension and cirrhosis, a conservative treatment is recommended. Bleeding hemorrhoids can be treated with hemorrhoidectomy when they do not respond to other treatments. CONCLUSION: International Literature is very scant about the treatment of patients affected by hemorrhoids in particular situations. A word of caution and concern even about the indication for minor outpatient procedures must be expressed in these patients, in order to avoid possible lifethreatening complications. The first line treatment is the conservative medical approach associated with the treatment of the primary disease.


MANAJERIAL ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 81
Author(s):  
Roziana Ainul Hidayati

Problems of poverty alleviation is not an easy problem. Poverty alleviation programs should be targeted, the exact activities, the right program, the right location and the right budget. This programs will be undertaken in order to reduce poverty more in the form of charity, physical development and others that it is less well targeted. a lot of program-the program as activities which basically only be duplicated or copy paste from the previous year's activities with the intention that the budget, physical also often undertaken without first reviewing whether the local area is very requires the existence of the physical building while there are things another even more a priority for local residents to improve their welfare. And one of the frameworks that can help us understand poverty as a multidimensional problem and its measurement is with the Millennium Development Goals or also known as the Millennium Development Goals (MDGs). The results showed that the achievement of the MDGs progress in East Java of 7 (seven) existing Goal progress of his "fast" exception Target IC on Goal I. To Target IC progress in the achievement of East Java Province "slow". Districts that experienced the severity of poverty for Goal I is Sampang and Pamekasan. , Districts that experienced the severity of poverty for Goal III is Bangkalan and Pamekasan. Districts that experienced the severity of poverty for Goal IV is Probolinggo and Bangkalan. Districts that experienced the severity of poverty for Goal V is Bangkalan and Sumenep. Districts that experienced the severity of poverty for the Goal and VII are Sampang regency. Districts that have the highest poverty severity for each Goal MDG namely Bangkalan on Goal III, IV and V


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