Mass Integration for Rigorous Process Modelling: A Sequential Approach for Direct Recycling

Mass integration has been used for reducing the amount of process waste and environmental impact. Despite its long history, new challenges constantly arise with the use of process simulation tools offering platforms for rigorous process models. Therefore, the typical mass integration framework requires modifications to accurately account for the process performance. In this work, a novel sequential methodology is presented to realize a recycle network with rigorous process models. Initially, under the hypothesis of constant compositions of the process sources, an optimal ranking of the process sinks is determined. The optimal recycling network thus obtained is then used for a sequential methodology considering rigorous process models. The violations of process constraints are handled at each sequential step through the concept of “tightening constant”. The application of the sequential methodology to two case studies proves its ability to provide good approximations of the global optima with low computational effort.

Teachers and Parents Perspective: Is It Difficult for Project-Based Learning (PjBL) During the Covid-19 Pandemic?

PjBL learning is one of the innovative learning models developed with a constructivist approach, where the learning process provides opportunities for students to be more active in the learning process. The purpose of this study was to identify the obstacles faced by teachers and parents in implementing the PjBL model in the network during the Covid-19 pandemic. The type of research conducted is descriptive qualitative. The sample of this research is 68 teachers and 390 students' parents. data collection methods used are interviews and questionnaires. Before using the instrument, the validity of the instrument was analyzed using the CVR, it was obtained that the CVR value for the teacher constraint questionnaire, the VCR results showed that the 38 instruments developed were valid with a score of 0.73-1. Meanwhile, for the reliability test, the Cronbach Alpha coefficient of 0.82 was obtained. Meanwhile, for parental instruments, CVR showed that the 25 instruments developed were valid with a score of 1 reliability with Cronbach's Alpha, obtained a score of 0.93. Analysis of the data used is the analysis of the data in the study carried out interactively. The results of the analysis show that the constraints are constraints on making learning plans, the availability of learning tools, the availability of tools and materials used in the PjBL learning process, constraints on the participation of other parties in the PjBL learning process, obstacles in the implementation of PjBL learning, especially the implementation of PjBL syntax and the last obstacle. is the PjBL assessment process. As well as the obstacles faced by parents in assisting students to learn, among others, are some parents still have problems providing facilities even though the numbers are not too large, another obstacle faced is that parents experience problems if the tools and materials used in PjBL learning are difficult to obtain, besides that, the obstacles experienced are that parents have difficulty because they do not understand the material being studied by students.

Multisatellite Flyby Inspection Trajectory Optimization Based on Constraint Repairing

With the rapid development of on-orbit services and space situational awareness, there is an urgent demand for multisatellite flyby inspection (MSFI) that can obtain information about a large number of space targets with little fuel consumption in a short time. There are two kinds of constraints, namely inspection constraints (ICs) at each flyby point and transfer process constraints (TPCs) in the actual mission. Further considering the influence of discrete and continuous variables such as inspection sequence, time, and maneuver scheme, it is complex and difficult to solve MSFI. To optimize it efficiently, the task flow and the problem model are defined firstly. Then, the algorithm framework based on constraint repairing is given, which contains repair methods of the ICs and the TPCs. Finally, the proposed method is compared with the nonrepair optimization method in two numerical examples. The results indicate that when the constraints are hard to meet, it is better and more efficient than the nonrepair method.

Development of Detailed FE Numerical Models for Assessing the Replacement of Metal with Composite Materials Applied to an Executive Aircraft Wing

This work provides a feasibility and effectiveness analysis, through numerical investigation, of metal replacement of primary components with composite material for an executive aircraft wing. In particular, benefits and disadvantages of replacing metal, usually adopted to manufacture this structural component, with composite material are explored. To accomplish this task, a detailed FEM numerical model of the composite aircraft wing was deployed by taking into account process constraints related to Liquid Resin Infusion, which was selected as the preferred manufacturing technique to fabricate the wing. We obtained a geometric and material layup definition for the CFRP components of the wing, which demonstrated that the replacement of the metal elements with composite materials did not affect the structural performance and can guarantee a substantial advantage for the structure in terms of weight reduction when compared to the equivalent metallic configuration, even for existing executive wing configurations.

EVALUASI PELAYANAN VAKSIN COVID – 19 (STUDI KASUS PUSKESMAS MOJO KOTA SURABAYA)

During the COVID-19 pandemic, cases of the increase in positive patients in Indonesia were getting out of control and increasing in number, therefore the Government is ready for a vaccine that will be given in stages according to the priority of the recipient as an effort to tackle the spread of COVID-19 transmission. Vaccination can be carried out in health agencies such as in Puskesmas. The purpose of this research was to evaluate the quality of service in the implementation of the COVID-19 vaccination at Puskesmas Mojo Surabaya. The research method used is a qualitative approach with descriptive methods. The data technique used was observation, interview, and documentation study and then analyzed using an interactive data analysis model. The results of this study are the quality of the COVID-19 vaccination service at Puskesmas Mojo Surabaya based on the dimensions of public service Tangibles, Reliability, Responsiveness, Assurance, and Emphaty. Applicable in the process of vaccination services at Puskesmas Mojo Surabaya on complicated online data collection and scheduling, because not all of the facilities and population data are available where there have never been residents who have moved, therefore the result is a long queue to update the data. The quality of vaccine services at Puskesmas Mojo Surabaya is satisfactory in terms of facilities, services, and resources and it is necessary to make efforts to schedule and collect data more regularly to overcome service process constraints

Production Scheduling Optimization of Prefabricated Building Components Based on DDE Algorithm

At present, the prefabricated construction industry is in a situation of increasing types of prefabricated components and generally high production costs. A hybrid optimization model considering continuity and discreteness for the production of fabricated concrete members is established to minimize production costs through the analysis of the production characteristics of precast concrete members. Under the premise of fully considering the staffing constraints, process constraints, construction period constraints, process constraints, and special process time limits for component production, the production arrangement and staffing of the components are rationalized and optimized. A discrete differential evolution (DDE) algorithm is introduced for such NP-hard problems. The double genetic chromosome coding mode and the active scheduling decoding method are adopted. Based on the improved POX (Precedence Operation Crossover) cross-evolution method, the global evolution operation is carried out, and an interchange-based local search method and continuous work penalty mechanism are designed to find the global optimal solution. The experimental results verify the practicality and effectiveness of the optimization model and algorithm.

IMPLEMENTASI PROGRAM KELUARGA HARAPAN (PKH) DI DESA WAUNG KECAMATAN BARON KABUPATEN NGANJUK (STUDI PADA BIDANG PENDIDIKAN)

Latar belakang dalam penelitian ini adalah bahwa Program Keluarga Harapan (PKH) Bidang Pendidikan penting untuk diterapkan dalam rangka meningkatkan angka sadar pendidikan dan partisipasi pendidikan dasar wajib sembilan tahun serta upaya mengurangi angka kemiskinan yang berlebihan pada suatu keluarga. Pendidikan sebagai perangkat penting dalam menignkatkan kesejahteraan masyarakat. Tujuan dalam penelitian ini adalah untuk mengetahui Implementasi PKH Bidang Pendidikan di Desa Waung Kecamatan Baron Kabupaten Nganjuk. Metode penelitian yang digunakan adalah metode kualitatif-deskriptif. Teknik pengumpulan data menggunakan teknik wawancara, observasi dan dokumentasi. Teknik Analisis data melalui l) Reduksi data, 2) Penyajian data, dan 3) Verifikasi. Hasil penelitian ini adalah sebagai berikut: Implementasi PKH dalam bidang pendidikan, diketahui bahwa fasilitas yang ada dalam implementasi PKH oleh PPKH dalam Bidang pendidikan belum tersedia dengan baik. Sedangkan indikator lainnya sudah terpenuhi dengan baik. Hambatan yang dihadapi dalam Proses verifikasi, kendala fasilitas, dan kendala proses informasi penyaluran dana. Upaya yang dilakukan yaitu meningkatkan proses verifikasi, melibatkan masyarakat dan warga umum, upaya meningkatkan kemampuan aparatur Pemerintah desa, dan konfirmasi ulang terhadap penerima bantuan. Kata Kunci: Implementasi, Program Keluarga Harapan (PKH), Bidang Pendidikan. The background in this research is that the Family Hope Program (PKH) in Education is important to be implemented in order to increase the awareness level of education and participation in basic nine-year compulsory education as well as efforts to reduce excessive poverty in a family. Education as an important tool in improving community welfare. The purpose of this researchwas to determine the Implementation of PKH in Education in Waung Village, Baron District, Nganjuk Regency. The research method used is a qualitative-descriptive method. Data collection techniques using interview, observation and documentation. Data analysis techniques through l) data reduction, 2) data displays and 3) verification. The results as follows: In the implementation of the PKH in the field of education, it is known that the existing facilities in the implementation of the PKH by the Implementers of PPKH in the field of education are not yet available properly. Meanwhile, other indicators have been fulfilled properly. Constraints faced in the verification process, constraints on facilities, and constraints in the information process for the distribution of funds. Efforts made include improving the verification process, involving the community and general citizens, efforts to improve the capacity of village government officials, and reconfirming aid recipients. Keywords: Implementation, Family Hope Program (PKH), Education Sector.