Humanity already possesses the fundamental scientific, technical, and industrial know-how to solve the carbon and climate problem for the next half-century. A portfolio of technologies now exists to meet the world's energy needs over the next 50 years and limit atmospheric CO2 to a trajectory that avoids a doubling of the preindustrial concentration. Every element in this portfolio has passed beyond the laboratory bench and demonstration project; many are already implemented somewhere at full industrial scale. Although no element is a credible candidate for doing the entire job (or even half the job) by itself, the portfolio as a whole is large enough that not every element has to be used.

“Stabilization wedges: Solving the climate problem for the next 50 years with current technologies” from science magazine (2004)

Recent progress of surface coating on cathode materials for high-performance lithium-ion batteries

Magnetorheological elastomers (MREs) are a class of recently emerged smart materials whose moduli are largely influenced when exposed to an external magnetic field. The MREs are particulate composites, where micro-sized magnetic particles are dispersed inside a non-magnetic polymeric matrix. These elastomers are known for changing their mechanical and rheological properties in the presence of a magnetic field. This change in properties is widely known as the magnetorheological (MR) effect. The MR effect depends on a number of factors such as type of matrix materials, type, concentration and distribution of magnetic particles, use of additives, working modes, and magnetic field strength. The investigation of MREs’ mechanical properties in both off-field and on-field (i.e. absence and presence of a magnetic field) is crucial to deploy them in real engineering applications. The common magneto-mechanical characterization experiments of MREs include static and dynamic compression, tensile, and shear tests in both off-field and on-field. This review article aims to provide a comprehensive overview of the magneto-mechanical characterizations of MREs along with brief coverage of the MRE materials and their fabrication methods.

/pdf/a-review-on-magneto-mechanical-characterizations-of-44oze4h4zx.pdf

A review on magneto-mechanical characterizations of magnetorheological elastomers

textCurrently, companies spend a great deal of effort on Corporate Social Responsibility (CSR) disclosures. CSR disclosure relates to the provision of information on companies' environmental and social performance. From an economic perspective, companies might disclose this information to avoid or decrease potential political costs. We construct a CSR disclosure index based on the Global Reporting Initiative (GRI) guidelines. Using content analysis, we analyze 130 listed German companies' CSR disclosures (470 firm-year observations) to investigate the determinants of these voluntary disclosure activities. Our results show that, consistent with the political cost theory, German companies' disclosures of all CSR issues are affected by their visibility, shareholder structure, and relationship with their US stakeholders. In addition, higher profitability is associated with more environmental disclosures. Finally, size and industry membership affect the amount of CSR disclosure.

Determinants of voluntary CSR disclosure: Empirical evidence from Germany

/pdf/a-review-on-the-fused-deposition-modeling-fdm-3d-printing-stu4vuyk9r.pdf

A review on the fused deposition modeling (FDM) 3D printing: Filament processing, materials, and printing parameters

Salafiyah Vocational School, in Margoyoso, Pati is one of the vocational schools in the Pati Regency, Central Java Province, that has implemented a teaching factory program as part of the learning process to improve student competencies according to skill competencies. This study examines the Optimi 

Teaching Factory as a Competency-Based Learning Program for Vocational High School

This study aims to obtain an overview of work motivation and employee performance at the Jambi provincial education office in the field of special education. Data collection was carried out through distributing questionnaires and carried out on 53 employees. The aspects studied are 5 dimensions of work motivation, namely physiological needs, security needs, love needs, self-esteem needs, and self-actualization needs. As well as the performance aspects studied include quantity, quality, punctuality, attendance, and ability to work together. Testing the data using statistical analysis such as validation and reliability tests, simple linear regression analysis, statistical hypothesis testing t test and coefficient of determination test from the results of the analysis with SPSS version 20 program, it can be seen that the regression equation formed The linear regression equation formed is Y 20.966+0.388X. The equation shows that the employee's performance is  0 then work motivation will increase by 0.388. From the results of the analysis obtained, it is known that the results of R square indicate that there is an influence of work motivation of 21.3% on employee performance, thus in the study of work motivation which has an influence on performance, the average number of effects of work motivation on employee performance as a whole is 21. ,3 and the remaining 78,7 are influenced by variables not examined in this study. Overall, from the 5 dimensions of work motivation variable, it has an average score of 221.8 which is categorized as good. Where the description of work motivation used by employees in the field of extraordinary education at the Jambi provincial education office is obtained, which is good for motivating work on the basis of consideration and good for work motivation. Motivation has a positive and significant influence on the performance of the Jambi provincial education office employees.

Pengaruh Motivasi Kerja terhadap Kinerja Pegawai Bidang Pendidikan Luar Biasa Pada Dinas Pendidikan Provinsi Jambi

Background of Study: Chicken is a food ingredient with high nutritional value that is consumed by  community, the high nutritional value of chicken meat makes it a food ingredient that is susceptible to biological hazards. One of the microbes that contaminate chicken meat is Salmonella Spp. These bacteria cause disease by food borne transmission and are mostly pathogenic. This pollution is caused by the environment, handling and marketing errors. The purpose of this study is to determine the risk factors for contamination of Salmonella Spp. on Broiler Chicken sold at Banguntapan MarketMethods: This research method was quantitative research with a cross sectional approach. The population of all chicken traders in the Banguntapan market. The sampling technique used purposive sampling technique, and the data were analyzed using the Chi Square Test.Results: The results of data analysis, there was a significant influence between environmental factors on Salmonella Spp contamination on Broiler Chicken with a p value of (0.033 0.05). There was a significant influence between Hygiene factors and seller activity on Salmonella Spp contamination on broiler meat with a p value of (0.013 0.05). There was a significant effect between the pH factor on Salmonella Spp contamination on broiler chicken with a p value of (0.0100.05). There is no significant effect of temperature on Salmonella Spp contamination on Broiler Chicken with a p value of (0.3510.05)Conclusions: Risk Factor in this research, there was a significant influence between the selling environment, hygiene and seller activities, and pH on the risk of Salmonella Spp contamination in Broiler Chicken (Gallus gallus domestica), and there was no significant effect between temperature and contamination of Salmonella Spp. on Broiler Chicken (Gallus gallus domestica) at Banguntapan MarketKeywords: Salmonella Spp; broiler chicken; Gallus gallus domesticus

Faktor Risiko Kontaminasi Salmonella Spp. Pada Daging Ayam Broiler (Gallus Gallus Domestica) Yang Dijual di Pasar Banguntapan

The findings and technological developments related to intelligent materials are increasingly attracting the attention of scientists. One such field is that of magnetorheological (MR) materials. Scientific studies on MR materials have been carried out to determine the performance and characteristics of, for example, MR dampers, MR elastomers, and MR foams. To the best of the authors’ knowledge, there has been no statistical discussion in the form of bibliometric analyses of developments in the field of MR materials in the last ten years. This is fascinating, considering that bibliometric studies have considerable impacts and contributions, such as studies on the growth of research patterns, avoiding the repetition of research topics, and analyzing future research. This also supports the future sustainability of the topic of MR materials, helping to bridge the gap that has probably existed since the introduction of MR materials. The relationship between the authors’ scientific research, domestic and global collaborations, and the evolution of themes over the last few years is also shown in this analysis. Thus, this study aimed to fill the gap in such materials by conducting a bibliometric analysis of 1830 articles related to MR materials published over the last 10 years. The results indicated that the field of MR materials has exhibited good growth. The introduction of MR fluid materials to new types of MR materials is still in the early stages of research, such as in applications with MR foam. Further analysis showed that there is a connection and dominance of scientific publications related to MR technology. Furthermore, based on bibliometric analysis, dominant theme changes in the area of MR elastomers, particularly related to carbonyl iron particles and MR polishing, is seldom mentioned, as is also the case for MR gels, MR foam, and MR grease. However, the discussion of new MR materials is a good opportunity to promote developments in the field of MR materials.

/pdf/bibliometric-review-of-magnetorheological-materials-23jfxyq9.pdf

Bibliometric Review of Magnetorheological Materials

This research introduces a magnetorheological elastomer (MRE) bushing that has the potential to be applied to vibration control for automotive applications. An annular shape of MRE bushing is designed and fabricated by natural rubber (NR) based MRE with homogenous distribution of carbonyl iron particles (CIPs). The component consists of five parts, which are the inner and outer pipes, MRE, coil bobbin that wound by an electromagnetic coil, top and bottom ring plates, and housing. Based on a conceptual design, the electromagnetic circuit is simulated using Finite Element Method Magnetics (FEMM) software for analyzing the distribution of magnetic flux. The fabricated MRE bushing is undergone a compression test and load adhesion test for the performance evaluation. The compression test is conducted by using the Universal Testing Machine (UTM) under various applied currents to obtain the force-displacement and stiffness behavior of the device. This study demonstrated that higher forces and stiffness are achieved compared to other MRE bushings. From here, at 5.5 mm of displacement, the ranges of forces are from 7.1 kN (off-state) to 8.5 kN (on-state at 2.5 A). Furthermore, the stiffness is increased by 19% from off-state to 2.5 A. Overall, the fabricated MRE bushing shows a significant response with the presence of the magnetic field from the simulation studies and experimental results. Thus, it has the potential for vibration control due to the ability to control rigidity.

Ubaidillah Ubaidillah

Papers

Teaching Factory as a Competency-Based Learning Program for Vocational High School

Pengaruh Motivasi Kerja terhadap Kinerja Pegawai Bidang Pendidikan Luar Biasa Pada Dinas Pendidikan Provinsi Jambi

Faktor Risiko Kontaminasi Salmonella Spp. Pada Daging Ayam Broiler (Gallus Gallus Domestica) Yang Dijual di Pasar Banguntapan

Bibliometric Review of Magnetorheological Materials

Force and stiffness behavior of natural rubber based magnetorheological elastomer bushing