scholarly journals Design of a Combination Tool

2020 ◽  
Vol 9 (3) ◽  
pp. 1918-1925
Keyword(s):  
Design Analysis ◽  
Single Stage ◽  
Project Work ◽  
Card Holder ◽  
Inverted Position ◽  
Design Complexity ◽  
Second Stage

The undertaken project work involves design, analysis and manufacture of a COMBINATION TOOL to produce TABLE TOP NAME CARD HOLDER. The main advantage of this combination tool is it can be accommodated with different operations in one single stage. This will reduce the complexity of the design of the tool. As the number of stages increases the design complexity also increases. Therefore usage of this tool will reduces the manufacturing and the design complexity and make the things easy. The combination tool performs both cutting and non-cutting operations. It can be done in the following way- The piercing, notching, lancing & bending operations are performed in the first stage, and then the blank is kept in the inverted position in the second stage where another bending is carried out. The relative positions with the previously pierced holes are maintained during the bending operation, with locating pins.

Temperature-phased anaerobic digestion of wastewater sludges

1997 ◽  
Vol 36 (6-7) ◽  
pp. 367-374 ◽  
Author(s):  
Yue Han ◽  
Shihwu Sung ◽  
Richard R. Dague
Keyword(s):  
Activated Sludge ◽  
Biogas Production ◽  
Single Stage ◽  
Fecal Coliforms ◽  
Waste Activated Sludge ◽  
State University ◽  
Iowa State University ◽  
Second Stage ◽  
Volatile Solids ◽  
Stage System

The temperature-phased anaerobic bioreactor (TPAB) has been under study by Dague and co-workers at Iowa State University. The temperature-phased approach involves a two-stage reactor system with the first stage operated at a thermophilic temperature (commonly 55°C) and the second stage operated at a mesophilic temperature (commonly 35°C). The purpose of laboratory study was to compare the performance of the temperature-phased system with the conventional single-stage mesophilic system for treating mixtures of primary and waste activated sludge. Of particular interest in the research was a comparison of the two systems from the standpoint of coliform reduction, volatile solids (VS) destruction, and biogas production. The temperature-phased system achieved complete destruction of total and fecal coliforms over a range of SRTs from 11 to 28 days. The concentration of fecal coliforms in the effluent from the temperature-phased system never exceeded 1000 MPN/g total solids (TS), which can meet the U.S. Code of Federal Regulations, Title 40 (40 CFR), Part 503 coliform requirements for Class A sludge. At the optimal SRTs ranging from 11 to 17 days, the capacity of VS removal of temperature-phased system was more than double that of the conventional single-stage system. The foaming problem associated with the digestion of waste activated sludge was eliminated.

Outcomes After Anterior or Complete Corpus Callosotomy in Children

Neurosurgery ◽  
2013 ◽  
Vol 74 (1) ◽  
pp. 17-28 ◽  
Author(s):  
Aimen S. Kasasbeh ◽  
Matthew D. Smyth ◽  
Karen Steger-May ◽  
Laleh Jalilian ◽  
Mary Bertrand ◽  
...  
Keyword(s):  
Seizure Control ◽  
Refractory Epilepsy ◽  
Single Stage ◽  
Seizure Onset ◽  
Corpus Callosotomy ◽  
Second Stage ◽  
Operative Complications ◽  
Pediatric Patient Population ◽  
Medically Refractory Epilepsy ◽  
Surgical Option

Abstract BACKGROUND: Corpus callosotomy (CC) is a valuable palliative surgical option for children with medically refractory epilepsy due to generalized or multifocal cortical seizure onset. OBJECTIVE: To investigate the extent of CC resulting in optimal seizure control in a pediatric patient population and to evaluate the modification of seizure profile after various CC approaches. METHODS: The records of 58 children (3–22 years of age at the time of surgery) with medically refractory epilepsy who underwent CC between 1995 and 2011 were retrospectively reviewed. RESULTS: Anterior two thirds callosotomy resulted in resolution of absence (P = .03) and astatic (P = .03) seizures, whereas anterior two thirds callosotomy followed by second-stage completion resulted in resolution of generalized tonic-clonic (GTC) (P = .03), astatic (P = .005), and myoclonic (P = .03) seizures in addition to a trend toward resolution of absence seizures (P = .08). Single-stage upfront complete callosotomy resulted in resolution of absence (P = .002), astatic (P < .0001), myoclonic (P = .007), and complex partial (P = .008) seizures in addition to a trend toward resolution of GTC (P = .06). In comparing a composite of subjects who underwent anterior two thirds callosotomy alone or 2-stage complete callosotomy before the second stage to complete the callosotomy with subjects who underwent upfront complete CC, a more favorable outcome was found in those with the upfront complete CC (P = .02). CONCLUSION: Single-stage upfront complete callosotomy is effective in relieving a broader spectrum of seizure types than anterior two thirds callosotomy or 2-stage complete callosotomy in children. The advantages of single-stage complete callosotomy must be weighed against the potentially higher risk of neurological and operative complications.

Two-stage thermophilic-mesophilic anaerobic digestion of waste activated sludge from a biological nutrient removal plant

2006 ◽  
Vol 53 (8) ◽  
pp. 149-157 ◽  
Author(s):  
S. Watts ◽  
G. Hamilton ◽  
J. Keller
Keyword(s):  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Nutrient Removal ◽  
Treatment Plant ◽  
Single Stage ◽  
Biological Nutrient Removal ◽  
Waste Activated Sludge ◽  
Two Stage ◽  
Primary Sludge ◽  
Second Stage

A two-stage thermophilic-mesophilic anaerobic digestion pilot-plant was operated solely on waste activated sludge (WAS) from a biological nutrient removal (BNR) plant. The first-stage thermophilic reactor (HRT 2 days) was operated at 47, 54 and 60 °C. The second-stage mesophilic digester (HRT 15 days) was held at a constant temperature of 36–37 °C. For comparison with a single-stage mesophilic process, the mesophilic digester was also operated separately with an HRT of 17 days and temperature of 36–37 °C. The results showed a truly thermophilic stage (60 °C) was essential to achieve good WAS degradation. The lower thermophilic temperatures examined did not offer advantages over single-stage mesophilic treatment in terms of COD and VS removal. At a thermophilic temperature of 60 °C, the plant achieved 35% VS reduction, representing a 46% increase compared to the single-stage mesophilic digester. This is a significant level of degradation which could make such a process viable in situations where there is no primary sludge generated. The fate of the biologically stored phosphorus in this BNR sludge was also investigated. Over 80% of the incoming phosphorus remained bound up with the solids and was not released into solution during the WAS digestion. Therefore only a small fraction of phosphorus would be recycled to the main treatment plant with the dewatering stream.

Efficiency Improvement in Entrained Flow Gasification

2011 ◽  
Author(s):  
Ankit Bhatnagar ◽  
S. Pushpavanam
Keyword(s):  
Oxygen Consumption ◽  
Single Stage ◽  
Stage Model ◽  
Two Stage ◽  
Entrained Flow ◽  
Second Stage ◽  
Cold Gas Efficiency ◽  
Stage System ◽  
Gas Efficiency ◽  
Cold Gas

In this work a one dimensional steady state model is developed for a single stage and two-stage bottom fed entrained flow coal gasifier for. The single stage model was first analysed for two different oxidants (i) oxygen and (ii) air to study their effects on gasification. Analysis proved oxygen to be the better oxidant. The model is then extended to a two stage gasifier. Here 30 (70) percent of the coal is fed in the first stage (second stage). The first (second) stage operates in oxidant rich (lean) environment. The performances of single stage and two-stage models are compared in terms of their cold gas efficiencies for the same coal feed rates. It is observed that a two-stage system has better cold gas efficiency (77%) than a single stage system (72%) with lower oxygen consumption. The two-stage model is used to optimise the O2/Coal ratio as the H2O/Coal ratio is varied in the 2nd stage. The optimum yields the highest cold gas efficiency with minimum possible oxygen consumption.

Design, analysis, and experimental investigation of a single-stage and low parasitic motion piezoelectric actuated microgripper

2020 ◽  
Vol 29 (4) ◽  
pp. 045028 ◽  
Author(s):  
Tilok Kumar Das ◽  
Bijan Shirinzadeh ◽  
Mohammadali Ghafarian ◽  
Ammar Al-Jodah
Keyword(s):  
Experimental Investigation ◽  
Design Analysis ◽  
Single Stage ◽  
Parasitic Motion

scholarly journals Design, Analysis and Simulation of a Single Stage Rocket (Launch Vehicle) Using RockSim

2021 ◽  
Vol 10 (04) ◽  
pp. 034-039
Author(s):  
Benneth Ifenna Okoli ◽  
Olusegun Samuel Sholiyi ◽  
Rasheed Olalekun Durojaye
Keyword(s):  
High Temperature ◽  
Combustion Chamber ◽  
Design Analysis ◽  
Single Stage ◽  
Stage Model ◽  
Rocket Launch ◽  
High Temperature And Pressure ◽  
Nose Cone ◽  
Temperature And Pressure ◽  
Different Parts

This project describes the design, analysis, assembly and simulation of a single stage model rocket systems, one designed with traditional subsystems for structural, avionics, combustion chamber and recovery integrated to give a desired altitude. The analysis was based on using Rocksim 9.6 to model the different parts that made up a rocket. Aluminium was used for designing the nose cone, the fuselage and the fin set. The combustion chamber, clamps, and nozzle were designed by making use of steel. Because of the high temperature and pressure being generated from the combustion of propellant, steel was suggested. The main and drogue parachutes were designed using tubular Kevlar. And the bulk-head was designed using Basswood. For the recovering of the rocket after launch, main and drogue parachutes were incorporated into the fuselages.

Exploring Complex Decision Making Units: A New Approach

1982 ◽  
Vol 19 (2) ◽  
pp. 182-191 ◽  
Author(s):  
Rowland T. Moriarty ◽  
John E. G. Bateson
Keyword(s):  
Decision Making ◽  
Large Scale ◽  
Empirical Studies ◽  
Single Stage ◽  
New Approach ◽  
Second Stage ◽  
Decision Making Unit ◽  
Complex Decision Making ◽  
Complex Decision ◽  
The Impact

Though the concept of a multiperson decision making unit (DMU) has been widely accepted in principle, very few empirical studies have surveyed all members of the DMU. In those few studies which have surveyed multiple decision participants, data were collected via “snowball” personal interviews. In a single-stage snowball a known member of the DMU is asked to provide a list of other persons involved in the decision making process. That list is used for a subsequent study. Multiple-stage snowballing involves asking all of the respondents in the first stage who else was in the DMU, then those in the second stage, and so on. Exhaustive snowballing involves continuing the process until no new DMU members are generated. As snowball personal interveiws are an extremely expensive method of collecting data, large-scale DMU research has been financially impractical for most empirical studies. A study of 319 DMUs was designed to assess the feasibility of snowballing by telephone and to ascertain the impact of exhaustive versus single-stage snowballing on the nature of the resultant DMU.

The Optimization Design Analysis of Loukouni Bridge in the Republic of Congo

2012 ◽  
Vol 256-259 ◽  
pp. 1665-1669
Author(s):  
Long Ying Zhang ◽  
Liang Zong ◽  
Yuan Qing Wang ◽  
Jun Li
Keyword(s):  
Optimization Design ◽  
Design Analysis ◽  
Optimization Analysis ◽  
Republic Of Congo ◽  
Box Section ◽  
Second Stage ◽  
Road Project ◽  
The Republic ◽  
Arch Bridges ◽  
National Road

Loukouni bridge is a deck type arch bridge with box section which is a part from the second stage of the 1st national road project of the Republic of Congo. This paper focuses on the optimization design analysis of the Loukouni bridge to make it more economical and reliable. The optimization analysis is implemented by ANSYS and contains two parts. One part focuses on the whole shape of the arch and try to optimize the arch axial coefficient. The other part considers the optimization of the size of the box section. The analysis results could provide useful suggestions for the design of Loukouni bridge and related steel arch bridges.

scholarly journals Automatic Attendance System with Face Recognition using Machine Learning

2020 ◽  
Vol 8 (6) ◽  
pp. 3642-3646
Keyword(s):  
Machine Learning ◽  
Face Recognition ◽  
Recognition Algorithm ◽  
Machine Learning Techniques ◽  
Project Work ◽  
Data Set ◽  
Second Stage ◽  
Learning Techniques ◽  
The Face ◽  
Face Detection And Recognition

Object and Face detection and recognition is one of the mostly researched area in computer vision. This particular field of work is widely used in mobile phones and laptops for unlocking the system by the user. Recently this field gained importance in the automatic attendance system in schools, colleges and institution. The institutions are moving from biometric based attendance to face recognition based attendance system. In this project work, I have used machine learning techniques to create a complete system of automatic attendance system which can be implemented very easily. There are majorly four steps involved in the system. Firstly, the datasets can be created instantly using webcam and in the second stage the created data set have to be trained and the trainer algorithm will create the trainer.yml document. As a next step, the face recognition algorithm have to be performed in order to recognize the faces of various students and teacher. In the final step, the attendance of the students will be updated in the CSV file or Excel. The proposed work is very much suited for the real time applications like automatic attendance system. HaarCascade is very eff

Sign in / Sign up

Export Citation Format

Share Document