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2021 ◽  
Vol 12 (3) ◽  
pp. 151
Author(s):  
Yanbiao Feng ◽  
Jue Yang ◽  
Zuomin Dong

Electrified vehicles (xEV), especially the battery electric vehicle (BEV), are burgeoning and growing fast in China, aimed at building a sustainable, carbon-neutral future. This work presents an overview and quantitative comparison of the carbon-neutral vehicles fuel options based on the well-to-wheel (WTW) analysis. A more intuitionistic figure demonstrates the fuel options for greenhouse gas (GHG) emissions and describes the sustainability. Electricity and hydrogen shift the tailpipe emissions to the upstream process, forming larger WTW emissions from a fuel cycle view. The electricity WTW GHG emission reaches as much as twice that of gasoline. However, the high efficiency of the electric drive system improves the WTW emission performance from a vehicle view, making the lowest WTW emission of BEV. The fuel options’ technical and environmental perspectives are presented. Finally, long-term carbon-neutral vehicle development is discussed.


KREATOR ◽  
2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Mawan Nugraha ◽  
A Sarmada ◽  
Ari Dwi Yulianto

In-depth observations have been made on the web printing process for newspaper production. Observations were made to identify problems related to the tension of the roll paper used in the production of newspapers. The problem of roll-paper tension is observed from the main material, the upstream process (Reelstand Unit), the printing process and its supporting units such as the wetting unit, inking unit and in the folder unit which is a contineous process. From observing the problems in the printing process, the causes and solutions to the problems were identified which were then used as an operating standard reference for the newspaper production using a web offset printing machine.Keywords—web offset printing machine, newspaper, paper tension


Author(s):  
Mariane A. Mendoza ◽  
Maria Virginia S. Buera ◽  
Frederick Ray I. Gomez ◽  
Allen Jay D. Kumawit

Singulation is a process in a semiconductor industry where high dense strips were singulated into single units. Jig saw singulation was the updated technology where strips were seated and vacuumed on a rubber nest jig during singulation. Jig saw singulation is also practical for high volume manufacturing as it demands minimal indirect materials. To cut the strips, jig alignment with the strip was measured by the machine to ensure that the rubber nest jig will not be cut and damaged while the strip is being singulated. However, with the different upstream process that the strip undergone, machine prompt frequent jig alignment errors when the machine detected that the strip saw street has high displacement with the recorded alignment of the saw street of rubber nest jig. Through this study, the authors have driven to understand the jig alignment errors occurrences as well as the assistance that can be made for the strip to be processed. The authors also included the study of the risks that might be imposed on both rubber nest jig and the affected strips, as well as the recommendations when jig alignment errors were encountered.


Author(s):  
Mohammad Alhisnawi ◽  
Aladdin Abdulhassan

<p class="JESTECAbstract">Content Centric Networking (CCN) is a modern architecture that got wide attention in the current researches as a substitutional for the current IP-based architecture. Many studies have been investigated on this novel architecture but only little of them focused on Pending Interest Table (PIT) which is very important component in every CCN router. PIT has fundamental role in packet processing in both upstream process (Interest packets) and downstream process (Data packets). PIT must be fast enough in order to not become an obstruction in the packet processing and also it must be big enough to save a lot of incoming information. In this paper, we suggest a new PIT design and implementation named CF-PIT for CCN router. Our PIT design depends on modifying and utilizing an approximate data structure called Cuckoo filter (CF). Cuckoo filter has ideal characteristics like: high insertion/query/deletion performance, acceptable storage demands and false positive probability which make it with our modification convenient for PIT implementation. The experimental results showed that our CF-PIT design has high performance in different side of views which make it very suitable to be implemented on CCN routers.</p>


Author(s):  
Afifa Ansari ◽  
Ayush Madan ◽  
Divya Prakash

Several human vaccinations were created at the end of the nineteenth century, Smallpox, rabies, plague, cholera, and typhoid vaccinations are among them. Major things to acknowledge before vaccine preparation is that we have to isolate the antibody firstly which our body has produced against the pathogen and what is the composition of that antibody and also the structure of an antibody. A vaccine is administered to induce immunity in an individual’s body. Typically, the manufacture of vaccine uses viral or bacterial antigen in it. It may be killed or attenuated vaccine (live but less virulent). The foremost step to produce a vaccine is to select the strains for the vaccine and to culture the strain or microorganism. These two steps are collectively known as the upstream process. This is further followed by isolation and purification of the microorganism and then after the inactivation of the organism which is used for vaccine preparation formulation of vaccine begins. The last step is to check quality control and then further lot release; all of these steps are included in downstream processing. Mostly used vaccines lack efficiency, potency and safety. To take the vaccine preparation to next level, the introduction of monoclonal antibodies, recombinant DNA, and protein engineering have been accelerated knowledge of pathogenic mechanisms. This review provides a new approach to the development of the succeeding generation of vaccines.


2021 ◽  
Author(s):  
Nagarathinam Selvaraj ◽  
Chao-Kuei Wang ◽  
Brian Bowser ◽  
Trevor L Broadt ◽  
Samir Shaban ◽  
...  

2020 ◽  
Vol 13 (2) ◽  
pp. 284-293
Author(s):  
Roberto Giordano ◽  
Elena Piera Montacchini ◽  
Silvia Tedesco

The textile system is one of the most influential production activities at a global level from an environmental point of view, both in relation to the processes that characterize the supply chain and in relation to pre and post-consumer waste. It produces million tons of global greenhouse gas emissions per year and it consumes millions of litres of water; it uses million tons of chemical products. Furthermore, millions of tons of special textile wastes are yearly landfilled in upstream process as well as in downstream process. Less of 1% of materials used to produce clothes becomes part of a closed-loop recycling and less of 2% are recycled in other industrial activities. Changing the textile industrial linear model in a circular one according to Systemic Design principles is advisable, starting from wastes and by-products. As proved in the working paper wastes, due to their properties, can assumed as inputs of new production systems. Particularly the scientific contribution deals with some research activities carried out within a project titled EDILTEX - Innovation for reusing in textile companies. The achievements are described, showing that construction and fashion are fields only apparently far from each other. They can - on the contrary - developing powerful synergies and products with interesting technological and physical performances.


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