scholarly journals Evaluating the Effects of Milling Speed and Screen Size on Power Consumed During Milling Operation

2021 ◽  
Vol 2 (2) ◽  
pp. 260-275
Author(s):  
Ademola Adebukola ADENIGBA ◽  
Samuel Dare OLUWAGBAYIDE
Keyword(s):  
Average Power ◽  
Cost Effective ◽  
Electrical Energy ◽  
P Value ◽  
Fish Feed ◽  
Bone Meal ◽  
Screen Size ◽  
Feed Ingredient ◽  
Milling Operation ◽  
Experimental Parameters

This study was conducted to evaluate the effect of rotor speed and screen size on power consumed during milling operation. The milling system was tested using three fish feed ingredients; bone meal, groundnut cake and maize. The moisture contents of the ingredients bought from the market are 13.1%, 14.7% and 17.5% dry basis, respectively. The milling machine was evaluated with the 3 kg of each feed ingredient and was replicated three times for each of the experimental parameters. The machine parameters varied during the experiment includes four screen sizes (1.5 mm, 2.0 mm, 2.5 mm and 3.0 mm) and five rotor speeds (1500 rpm, 1800 rpm, 2100 rpm, 2400 rpm and 2700 rpm). Regression analysis was carried out on the data collated. The analysis was used to develop a model which is capable of predicting the electrical energy (kJ) consumed. There was no significant effect of screen size on the average power consumed during milling since there is no linear relationship between power consumed and screen size. However, there is a significant effect of speed on average power consumed, the power consumed increases as speed decreases therefore making milling operation at higher speed to be cost effective since it doesn’t require much power to achieve the required output. The P-Value depicts that screen size has no significant effect on the electrical energy consumed during the milling operation while speed has a significant effect on the electrical energy used at 95% confidence level.

Electrochemical cleaning of soils with different concentrations of oil pollution using a single source of electrical voltage

2020 ◽  
Vol 10 (6) ◽  
pp. 674-680
Author(s):  
Nikolay S. Shulaev ◽  
◽  
Valeriya V. Pryanichnikova ◽  
Ramil R. Kadyrov ◽  
Inna V. Ovsyannikova ◽  
...  
Keyword(s):  
Contaminated Soils ◽  
Oil Pollution ◽  
Cost Effective ◽  
Electrical Energy ◽  
Design Parameters ◽  
Technological Infrastructure ◽  
Chemical Reagents ◽  
Electrode Space ◽  
Soil Excavation ◽  
Interelectrode Resistance

The most essential scientifific and practical task in the area of ecological safety of pipelines operation is the development and improvement of methods of purifification and restoration of oil-contaminated soils. One of the most effificient and cost effective methods is electrochemical purifification, that does not require the use of expensive chemical reagents and soil excavation. However, the consideration of non-uniform contamination of various soil sections is required. The article examines the features of the organization and technological infrastructure for electrochemical purifification of non-uniformly contaminated soils when using a single electrical energy source, a method for calculating the design parameters of the corresponding installation is proposed. Effificient purifification of non-uniformly contaminated soil when using a specifified voltage is possible through the use of different-sized electrodes. For each soil type, the amount of transmitted electric charge required for soil purifification is determined by the concentration of the contaminant. Allocation of cathodes and anodes as parallel batteries and their connection using individual buses is an effective and energy-effificient solution, since an almost-uniform electric fifield is created in an inter-electrode space, thus allowing the reduction of the interelectrode resistance of the medium.

scholarly journals Haemoconcentration as a predictor of severity in acute pancreatitis

2016 ◽  
Vol 4 (1) ◽  
pp. 3-7
Author(s):  
Tanka Prasad Bohara ◽  
Dimindra Karki ◽  
Anuj Parajuli ◽  
Shail Rupakheti ◽  
Mukund Raj Joshi
Keyword(s):  
Acute Pancreatitis ◽  
Pearson Correlation ◽  
Characteristic Curve ◽  
Scoring Systems ◽  
Cost Effective ◽  
Receiver Operator Characteristic Curve ◽  
First Episode ◽  
P Value ◽  
Receiver Operator Characteristic ◽  
Chi Square

Background: Acute pancreatitis is usually a mild and self-limiting disease. About 25 % of patients have severe episode with mortality up to 30%. Early identification of these patients has potential advantages of aggressive treatment at intensive care unit or transfer to higher centre. Several scoring systems are available to predict severity of acute pancreatitis but are cumbersome, take 24 to 48 hours and are dependent on tests that are not universally available. Haematocrit has been used as a predictor of severity of acute pancreatitis but some have doubted its role.Objectives: To study the significance of haematocrit in prediction of severity of acute pancreatitis.Methods: Patients admitted with first episode of acute pancreatitis from February 2014 to July 2014 were included. Haematocrit at admission and 24 hours of admission were compared with severity of acute pancreatitis. Mean, analysis of variance, chi square, pearson correlation and receiver operator characteristic curve were used for statistical analysis.Results: Thirty one patients were included in the study with 16 (51.61%) male and 15 (48.4%) female. Haematocrit at 24 hours of admission was higher in severe acute pancreatitis (P value 0.003). Both haematocrit at admission and at 24 hours had positive correlation with severity of acute pancreatitis (r: 0.387; P value 0.031 and r: 0.584; P value 0.001) respectively.Area under receiver operator characteristic curve for haematocrit at admission and 24 hours were 0.713 (P value 0.175, 95% CI 0.536 - 0.889) and 0.917 (P value 0.008, 95% CI 0.813 – 1.00) respectively.Conclusion: Haematocrit is a simple, cost effective and widely available test and can predict severity of acute pancreatitis.Journal of Kathmandu Medical College, Vol. 4(1) 2015, 3-7

scholarly journals Clinical Outcome of Autologous Serum Therapy in Chronic Idiopathic Urticaria

2017 ◽  
Vol 15 (1) ◽  
pp. 71-74 ◽  
Author(s):  
Dharmendra Karn ◽  
Shekhar KC
Keyword(s):  
Skin Prick Test ◽  
Chronic Urticaria ◽  
Statistical Significance ◽  
Cost Effective ◽  
Chronic Idiopathic Urticaria ◽  
Autologous Serum ◽  
P Value ◽  
Prick Test ◽  
H1 Antihistamines ◽  
Serum Therapy

Background: Quality of life in chronic idiopathic urticaria is hampered as efficacy of H1-antihistamines is limited. Autologous serum containing tolerance-generating anti-idiotype antibodies is a novel and cost-effective therapy. This study was conducted to evaluate the efficacy of autologous serum therapy (AST) among chronic urticaria patients with autologous skin prick test positive and negative status.Methods: Untreated 102 patients of chronic urticaria were enrolled in a non-randomized interventional study. Patients were categorized into two groups based on autologous serum skin prick test as test positive (ASST +) and test negative (ASST -). Patients were then treated with intramuscular injection of 0.05ml per kg body weight of autologous serum weekly for 10 weeks. Urticaria activity scoring (UAS) tool was used for quantification of the symptoms. Weekly recording of UAS (range: 0-42) was made before the therapy (baseline) and during the therapy for 10 weeks.Results: Significant improvement with AST in the mean UAS was noted from baseline to 10 weeks in both the group of patients (14.6 ± 6.3 and 10.2 ± 5.1 for ASST+ group; 16.9 ± 7.8 and 8.6 ± 4.8 for ASST- group; at baseline and 10 weeks, respectively (p-value for both <0.05)). However no statistical significance was found while comparing the efficacy of the therapy against ASST + and ASST - Groups (p-value > 0.05).Conclusions: Irrespective of autologous skin prick test results, autologous serum therapy showed significant improvement in patients with chornic idiopathic urticaria. AST can, thus, be an effective treatment modality for it.

A Creative Vibration Energy Harvesting System to Support a Self-Powered Internet of Thing (IoT) Network in Smart Bridge Monitoring

2020 ◽  
Author(s):  
Saman Farhangdoust ◽  
Claudia Mederos ◽  
Behrouz Farkiani ◽  
Armin Mehrabi ◽  
Hossein Taheri ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Cantilever Beam ◽  
Average Power ◽  
Electrical Energy ◽  
Laser Vibrometer ◽  
Stay Cable ◽  
Fe Modelling ◽  
Vibration Energy Harvesting ◽  
Piezoelectric Energy ◽  
Energy Harvesting System

Abstract This paper presents a creative energy harvesting system using a bimorph piezoelectric cantilever-beam to power wireless sensors in an IoT network for the Sunshine Skyway Bridge. The bimorph piezoelectric energy harvester (BPEH) comprises a cantilever beam as a substrate sandwiched between two piezoelectric layers to remarkably harness ambient vibrations of an inclined stay cable and convert them into electrical energy when the cable is subjected to a harmonic acceleration. To investigate and design the bridge energy harvesting system, a field measurement was required for collecting cable vibration data. The results of a non-contact laser vibrometer is used to remotely measure the dynamic characteristics of the inclined cables. A finite element study is employed to simulate a 3-D model of the proposed BPEH by COMSOL Multiphasics. The FE modelling results showed that the average power generated by the BPEH excited by a harmonic acceleration of 1 m/s2 at 1 Hz is up to 614 μW which satisfies the minimum electric power required for the sensor node in the proposed IoT network. In this research a LoRaWAN architecture is also developed to utilize the BPEH as a sustainable and sufficient power resource for an IoT platform which uses wireless sensor networks installed on the bridge stay cables to collect and remotely transfer bridge health monitoring data over the bridge in a low-power manner.

A COMPARATIVE STUDY OF EFFICACY, POTENCY AND RECOVERY OF INTRATHECAL 0.5% ROPIVACAINE WITH FENTANYLAND 0.5% LEVOBUPIVACAINE WITH FENTANYL IN LOWER ABDOMINAL SURGERIES IN PATIENTS OF 18-60YEARS OF AGE

2021 ◽  
pp. 74-76
Author(s):  
Payel Mitra ◽  
Archana Roy ◽  
Aamir Huda
Keyword(s):  
Comparative Study ◽  
Motor Block ◽  
Length Of Hospital Stay ◽  
Cost Effective ◽  
Outpatient Setting ◽  
P Value ◽  
Equal Concentration ◽  
Medical College ◽  
Institutional Ethics ◽  
Care Surgery

INTRODUCTION:The recent trend in health care centres everywhere is to provide cost effective care to the patients. There is an increasing trend towards ambulatory day care surgery and rapid discharge of the patients. The operation of inguinal hernia or incisional hernia and even simple ligation surgeries are done without much complexities nowadays and can be completed in 60-90min without much intra or postoperative complications. Hence these have become an ideal procedure for outpatient setting and thereby reducing length of hospital stay. AIMS AND OBJECTIVE:A comparative study of efcacy, potency and recovery of intrathecal 0.5% ropivacaine with fentanyl and 0.5% levobupivacaine with fentanyl in lower abdominal surgeries in patients of 18-60years of age. MATERIALS AND METHOD: This is a prospective, comparative, observational study was conducted on 60 patients undergoing various lower abdominal surgeries under subarachnoid block (SAB) at Nil Ratan Sircar Medical College and Hospital, Kolkata, West Bengal. This study was conducted over a period of 24-month. Approval of the Institutional Ethics Committee was taken. Awritten informed consent in the local language was taken from every patient. RESULT AND ANALYSIS: In RF 5 patients (17%) had onset at 3min, 17patients (57%) at 6min, 7 patients (23%) at 9min, 1 patient (3%) at 12min. In LBF 8 patients had onset at 0 min, 22 patients had onset at 3min. p value is less than 0.0001 which is statistically signicant. In RF, 23 patients (77%) had duration of motor block for 150min and 7 patients (23%) had for 180min. In LBF, 26 patients (87%) had duration of motor block for 210 min and 4 patients (13%) had for 180min. The p value is less than 0.0001, which is statistically signicant. SUMMARYAND CONCLUSION: This study was to compare potency, efcacy and recovery between the two groups of drugs. A potency of a drug is a measure of drug activity expressed in terms of the amount required to produce an effect of given intensity. Here both the drugs in comparison was given in equal concentration and found that levobupivacaine produced higher effect, reached Bromage 3 in lesser time than ropivacaine. So levobupivacaine was more potent drug. Efcacy is the ability to get a job done satisfactorily

scholarly journals Real world assessment of an auto-parametric electromagnetic vibration energy harvester

2017 ◽  
Vol 29 (7) ◽  
pp. 1481-1499 ◽  
Author(s):  
Yu Jia ◽  
Jize Yan ◽  
Sijun Du ◽  
Tao Feng ◽  
Paul Fidler ◽  
...  
Keyword(s):  
Parametric Resonance ◽  
Real World ◽  
Average Power ◽  
Electrical Energy ◽  
Wireless Sensor ◽  
Vibration Energy ◽  
Vibration Energy Harvesting ◽  
Vibration Energy Harvester ◽  
Sinusoidal Input ◽  
Micro Electromechanical System

The convention within the field of vibration energy harvesting has revolved around designing resonators with natural frequencies that match single fixed frequency sinusoidal input. However, real world vibrations can be random, multi-frequency, broadband and time-varying in nature. Building upon previous work on auto-parametric resonance, this fundamentally different resonant approach can harness vibration from multiple axes and has the potential to achieve higher power density as well as wider frequency bandwidth. This article presents the power response of a packaged auto-parametric VEH prototype (practical operational volume of ∼126 cm−3) towards various real world vibration sources including vibration of a bridge, a compressor motor as well as an automobile. At auto-parametric resonance (driven at 23.5 Hz and 1 g rms), the prototype can output a peak of 78.9 mW and 4.5 Hz of −3dB bandwidth. Furthermore, up to ∼1 mW of average power output was observed from the harvester on the Forth Road Bridge. The harvested electrical energy from various real world sources were used to power up a power conditioning circuit, a wireless sensor mote, a micro-electromechanical system accelerometer and other low-power sensors. This demonstrates the concept of self-sustaining vibration powered wireless sensor systems in real world scenarios, to potentially realise maintenance-free autonomous structural health and condition monitoring.

scholarly journals EFFICACY OF LATERAL WEDGING IN FOOTWEAR IN MEDIAL COMPARTMENT OSTEOARTHRITIS KNEE

2019 ◽  
pp. 1-3
Author(s):  
Suman Badhal ◽  
U. Singh ◽  
S. L Yadav ◽  
Gita Handa
Keyword(s):  
Intervention Group ◽  
Cost Effective ◽  
Mean Difference ◽  
Medial Compartment ◽  
Treatment Modalities ◽  
Rank Test ◽  
P Value ◽  
Knee Oa ◽  
The Mean ◽  
Group B

INTRODUCTION: In Knee osteoarthritis (OA) Shoe modifications, such as lateral-wedge insoles or shock absorbing shoes with insoles, have been recommended for conservative therapy of mild knee OA but with little objective data on Indian patients. OBJECTIVE : this prospective study was done to study the effect of lateral heel sole wedging (insole) in the patients of OA of knee (medial compartment) and its relation to function,pain and stiffness parameters status on VAS and WOMAC scale and to see the requirement of the number of Aceclofenac tablets. METHODS: 60 patients fulfilling the inclusion criteria were enrolled and divided into intervention group A (30) and nonintervention Group B (30) with random allocation.Paired t-test,Wilcoxon sign rank test and Man Whitney U test were applied at significant p-value of <0.05%. RESULTS: the reduction of mean difference in pain on VAS and WOMAC scale, improvement in Mean difference in function parameters the mean reduction of pain in standing/ walking,bending and ascending/descending at WOMAC scale was significantly higher in intervention group. Also the mean reduction in the need for aceclofenac was significantly lower in intervention group evident from fourth week onward to fifth and sixth week.Conclusion:The lateral wedging in shoes in medial joint osteoarthritis is beneficial and it can be cost-effective conservative treatment modalities in early osteoarthritis patients, particularly in developing countries as it can reduces the requirement of NSAIDS and improve functional level of patients by reducing pain in various activities.

scholarly journals Bioremediation of Some Reactive Dyes Commonly used in Fabric Re-dyeing by Chlorella vulgaris

2021 ◽  
pp. 10-19
Author(s):  
Zainab M. Sani ◽  
Aisha S. Dalhatu ◽  
Baha’uddeen S. Adam ◽  
Kasim Mohammed ◽  
Yusuf Y. Muhammad ◽  
...  
Keyword(s):  
Chlorella Vulgaris ◽  
Dye Removal ◽  
Statistical Significance ◽  
Reactive Dyes ◽  
Basal Medium ◽  
Textile Wastewater ◽  
Cost Effective ◽  
P Value ◽  
Wastewater Samples ◽  
Reactive Green 19

Aim: The work was aimed at assessing the potential of Chlorella vulgaris in remediation of reactive dyes. Place and Duration of Study: Department of Biological Sciences, Department of Plant Biology and Department of Biochemistry, Bayero University, Kano, Nigeria, between January 2019 and December 2019. Methodology: Wastewater containing individual reactive dyes: reactive red 198 (RR198), reactive yellow 176 (RY176), reactive green 19 (RG19), reactive orange 122 (RO122), reactive red 195 (RR195) and reactive violet 1 (RV1) were collected from a local fabric re-dyeing pit at Kofar Na’isa, Kano, Nigeria. The green microalga C. vulgaris was cultured in Bold Basal medium (BBM) at 30 ± 2°C and subjected to adsorption and decolourization assays of the dyes. Results: The highest dye removal efficiency by enzymatic action was recorded after 48 hours, while that for the biomass adsorption was at day 14, at pH 11.3 and temperature of 30°C. The percentage dye removal by adsorption and decolourization were within the ranges of 68.1-97.8% and 69.8-99.9% respectively. Dye removal decreased with increase in contact time until saturation is attained. Freundlich’s isotherm model was best fitted for the adsorption of the dyes with a strong linear correlation coefficient, R2 ranging from 0.954-0.811. There was a strong linear relationship and high statistical significance among the dyes for both decolourization and adsorption (P value; .01). Conclusion: Chlorella vulgaris was found to be effective in the removal of reactive dyes from textile wastewater samples. The results revealed C. vulgaris to be a cost-effective and eco-friendly biosorbent that can be used for the treatment of wastewaters containing toxic dyes.

scholarly journals A comparative study of low doses of intrathecal ketamine and midazolam with bupivacaine for postoperative analgesia in infraumbilical surgeries

2019 ◽  
Vol 6 (2) ◽  
pp. 197
Author(s):  
Rajabhushanam M. ◽  
Sunil Kumar K. ◽  
Syed Ali Aasim ◽  
Venkatesh S.
Keyword(s):  
Postoperative Analgesia ◽  
Cost Effective ◽  
Rapid Onset ◽  
Spinal Block ◽  
P Value ◽  
Sensory Level ◽  
Hyperbaric Bupivacaine ◽  
First Choice ◽  
Mean Time

Background: Infra-umbilical surgeries may be performed under local, regional (spinal or epidural) or general anaesthesia, spinal block is still a first choice, because of its rapid onset, high quality of blockade, lack of catheter related infection, less failure rate and also cost effective but the duration of block and postoperative analgesia is limited. The purpose of study was to compare the efficacy of adding ketamine to 0.5% hyperbaric bupivacaine with midazolam to 0.5% hyperbaric bupivacaine in elective infraumbilical procedures.Methods: A randomized, single blinded, clinical study. 60 subjects were enrolled from the patients presenting for elective infraumbilical surgeries after following the inclusion and exclusion criteria laid down for the study. Sixty ASA Grade I and II patients undergoing infra umbilical surgeries were randomly divided into one of the two equal groups (n=30).Results: Total 60 patients were included in this study. The mean time to achieve T10 sensory level and modified bromage scale III was prolonged in group M (4.33±1.09, 6.66±1.26 min) as compared to group K (3.3±0.7, 4.96±1.21 min) which was statistically significant (P value <0.05).Conclusions: The present study concludes that addition of intrathecal midazolam to hyperbaric bupivacaine provide very good and prolonged post-operative analgesia without significant intra-operative and post-operative side effects compared to intrathecal ketamine.

scholarly journals Analisis Pengaruh Kepadatan Debu dan Penggunaan APD Pekerja Pabrik Pakan Ikan Terhadap Gangguan Fungsi Paru Pada Pekerja Pabrik Pakan Ikan di Kecamatan XIII Koto Kampar

2015 ◽  
Vol 2 (2) ◽  
pp. 129
Author(s):  
Indrawati Indrawati ◽  
Zulkarnaini Zulkarnaini ◽  
Suyanto Suyanto
Keyword(s):  
Chemical Properties ◽  
Respiratory Illness ◽  
P Value ◽  
Fish Feed ◽  
Factory Workers ◽  
Cross Sectional ◽  
Function Impairment ◽  
Cross Sectional Design ◽  
Lung Function Impairment ◽  
And Chemical Properties

Cases of pulmonary disorders caused by exposure to dust are found in Indonesia, avariety of factors in the onset of respiratory illness as a result of dust covering the particlesize, shape, concentration, solubility and chemical properties as well as long exposure,several factors of karakteristi workers also can also affect the state including lung, smokinghabit, the habit of wearing personal protective equipment, exercise habits, etc. (karbella2011). The purpose of this study was to determine the effect of the analysis of ambient dustlevels and use of PPE with the incidence of pulmonary function impairment. This study usesobservational study design, with a cross-sectional design that was conducted in May-July2015 in Fish Feed Plant Koto Kampar District XIII. Number of samples 32 people.Measuring instruments used are questionnaires and observation sheets. Analiais data used issimple logistic regression. The results showed that the variables associated with impairedlung function are variable dust density (p value 0.001), use of PPE (p value 0.001), thevariable counfounding; smoking (p value 0.005), and sports (p value 0.014). While mostdominant variable affecting lung function impairment in workers fish feed is variable dustdensity (p value 0.009) and use of PPE (p value 0.023). Advised on factory workers tomaintain the safety of health themselves by using personal protective mill dust densityenvironment experienced during work. 

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