Experimental investigation of ethylene hydroformylation to propanol on Rh and Co based catalysts

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Analysis of wireless and catenary power transfer systems for electric vehicle range extension on rural highways

This paper analyzes two different transportation electrification charging schemes, i.e., an embedded wireless power transfer system and an overhead catenary wire system, for use in range extension of electric vehicles on rural highways. The efficiency, feasibility, and benefits of the two schemes are examined. Electric vehicles currently lack widespread popularity mainly due to battery limitations, especially for long distance travel. The rural highway charging methods presented here can greatly increase the range of electric vehicles while decreasing battery sizes. Average modeling approaches for power electronics and vehicle usage were developed in MATLAB/Simulink to compare the two systems, each at two power levels. 30 kW and 48 kW were chosen to demonstrate the differences between power levels, both capable of maintaining a positive net charge on a dynamic electric vehicle. Component efficiencies, energy transfer levels, and installation percentages for the various models were determined. The models were applied to California highway I-5 to show immense potential savings over gasoline vehicles. It was shown that catenary charging is cheaper and has higher energy transfer than wireless; however, it has difficulty servicing all vehicle types, has visible wires, and requires more maintenance. A small scale hardware prototype of the WPT system was created in order to demonstrate the feasibility of power transfer at the proposed relative distances and speeds.Ope

Integrated Circuits for Programming Flash Memories in Portable Applications

Smart devices such as smart grids, smart home devices, etc. are infrastructure systems that connect the world around us more than before. These devices can communicate with each other and help us manage our environment. This concept is called the Internet of Things (IoT). Not many smart nodes exist that are both low-power and programmable. Floating-gate (FG) transistors could be used to create adaptive sensor nodes by providing programmable bias currents. FG transistors are mostly used in digital applications like Flash memories. However, FG transistors can be used in analog applications, too. Unfortunately, due to the expensive infrastructure required for programming these transistors, they have not been economical to be used in portable applications. In this work, we present low-power approaches to programming FG transistors which make them a good candidate to be employed in future wireless sensor nodes and portable systems. First, we focus on the design of low-power circuits which can be used in programming the FG transistors such as high-voltage charge pumps, low-drop-out regulators, and voltage reference cells. Then, to achieve the goal of reducing the power consumption in programmable sensor nodes and reducing the programming infrastructure, we present a method to program FG transistors using negative voltages. We also present charge-pump structures to generate the necessary negative voltages for programming in this new configuration

A New Approach to Improve Inconsistency in the Analytical Hierarchy Process

In this paper, a new approach based on the generalized Purcell method for solving a system of homogenous linear equations is applied to improve near consistent judgment matrices. The proposed method relies on altering the components of the pairwise comparison matrix in such a way that the resulting sequences of improved matrices approach a consistent matrix. The complexity of the proposed method, together with examples, shows less cost and better results in computation than the methods in practice

Story of Man’s Creation for Shelley’s Frankenstein:

This study is an attempt to examine ecofeminism in the patriarchal society of Frankenstein of Shelley. At first glance, the novel is a manifestation of the patriarchal world of Shelley because the male characters are present, and almost all of the women in the novel either kill or die. But it can be perceived that Shelley’s female characters are present in their own ways because they are present in nature, as a matter of fact, the female character’s absence and passivity are the emblems of their overwhelming presence so much that even the monster also has some feminine features, and he is used to being passive, because when he appears, it is either dark or moonlight, both of them have feminine attributes. The narrations of novel events are almost described in the sea, which is also the female symbol. Hence, Shelley tries to increase the women’s presence in her own ways in her novel through natural features. The presentation of natural elements influences Monster so much that he also reveals the feminine, goddess features. It can be concluded that the research method of this study is to find Shelley’s ecofeminism attributes, the actual presence of women, and their virtual absence due to ecofeminism, because Shelley has used their own specific ways to show that women are very present in her patriarchal society so much that even all of the male characters have dual features and the feminine features are not absent but they are very present in nature and characters of the novel. Therefore, women’s absence is Shelley’s method to reveal their absolute presence