LabVIEW Based Laboratory Typed Test Setup for the Determination of Induction Motor Performance Characteristics

Calis, Hakan,Caki, Eyup The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.6

Induction motors are widely used due to their rugged, robust and easy to care features. Since they are heavily used in industry, testing of three phase induction motors have play a vital role. In order to determine motor equivalent circuit parameters, efficiency of motor, squirrel caged laboratory sized an induction motor test setup is prepared. It is suitable for the induction motor with the frame size of 100 and 112. A virtual Instrumentation typed engineering workbench (called as LabVIEW) software packet, is utilized as a graphical user interface program. Motor input power is measured by measuring the input voltage, current and power factor with the help of hall effect typed voltage and current transformers. Also, the output power is measured by measuring the speed and torque with the help of an encoder and torque sensor. All outputs of the voltage and current transformer, encoder and temperature, torque sensors are given to the Data Acquisition Card (DAQ) which acquires the data for processing and then the equivalent circuit parameters, efficiency, performance and loading characteristics are found out, using LabVIEW based user interface. It is suggested to use this test rig for the quality control of produced motors in industry, and an educational experiment setup in the school laboratories.

LabVIEW Based Laboratory Typed Test Setup for the Determination of Induction Motor Performance Characteristics

Hakan Calis,Eyup Caki 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.6

Induction motors are widely used due to their rugged, robust and easy to care features. Since they are heavily used in industry, testing of three phase induction motors have play a vital role. In order to determine motor equivalent circuit parameters, efficiency of motor, squirrel caged laboratory sized an induction motor test setup is prepared. It is suitable for the induction motor with the frame size of 100 and 112. A virtual Instrumentation typed engineering workbench (called as LabVIEW) software packet, is utilized as a graphical user interface program. Motor input power is measured by measuring the input voltage, current and power factor with the help of hall effect typed voltage and current transformers. Also, the output power is measured by measuring the speed and torque with the help of an encoder and torque sensor. All outputs of the voltage and current transformer, encoder and temperature, torque sensors are given to the Data Acquisition Card (DAQ) which acquires the data for processing and then the equivalent circuit parameters, efficiency, performance and loading characteristics are found out, using LabVIEW based user interface. It is suggested to use this test rig for the quality control of produced motors in industry, and an educational experiment setup in the school laboratories.

Comparison of Femoral Geometry among Cases with and without Hip Fractures

Havva Talay Calis,Merih Eryavuz,Mustafa Calis 연세대학교의과대학 2004 Yonsei medical journal Vol.45 No.5

Hip fractures have high morbidity and mortality rate for the people as a complication of osteoporosis and is generally seen in old age. It is known that femoral geometric measurements are important in the assessment of hip fracture risks. This study aimed to examine the association between hip geometry and hip fracture in post-menopausal elderly females. In the present study, 232 hip X-rays were taken from women with no hip fractures (Group 1) and 29 post-menopausal women with hip fractures (Group 2) after a minor trauma. After standard anterior-posterior plain pelvic X-ray radiographs were obtained, various radiographic measurements were performed in all cases, including the hip axis length (HAL), femoral neck axis length (FAL), acetabular width (AW), femoral head width (HW), femoral neck width (FW), femoral shaft width (FSW), intertrochanteric width (TW), lateral and medial cortical thickness of the femoral shaft (LCT, SMCT), femoral neck cortical thickness (NMCT) and femoral neck-shaft angle (Q-angle). In group 1, the mean age, weight and height were 62.5±7.4 years, 70.8±12.5kg, and 157.5±6.7cm, respectively. In group 2, these values were 70.17±6.8 years, 64.7±11.5 kg, and 158.3±2.7cm, respectively. There were no statistically significant differences in the measurements of HAL, FAL, AW and HW between the two groups. In group 2, the mean FW value was significantly higher than in group 1 (p= 0.01). The mean values for FSW, TW, NMCT, SMCT, LCT were statistically lower in group 2 than those in group 1 (p= 0.01, p=0.038, p=0.001, p<0.001, p<0.001, respectively). Q-angle was also significantly higher in cases with hip fracture than in cases with no hip fracture (p=0.01). The values of FW, FSW, TW, NMCT, SMCT, LCT and Q-angle seem to be important parameters in the evaluation of hip fracture risks. However, further studies are needed to clarify this conclusion.

A comparative study of coal fly and bottom ashes as sustainable electroactive vibration damping materials

Deniz Begen,Gokce Calis-Ismetoglu,Omer Yunus Gumus,Halil Ibrahim Unal 대한환경공학회 2024 Environmental Engineering Research Vol.29 No.4

Coal is used in most of the power and chemical plants to meet energy needs which produce various waste ashes. Reuse of these ashes as electroactive materials has great importance for sustainable development. In this study, it was detected that the main components of coal fly (CFA) and bottom ashes (CBA) were oxides of silica (SiO₂), iron (Fe₂O₃), aluminium (Al₂O₃), and magnesium (MgO), besides carbon. These are well-known electrorheological (ER) active materials. The aim of this study is to reveal dielectric and electroactive vibration damping capabilities of CFA and CBA. According to the dielectric and ER flow tests carried out in insulating silicone oil (SO), the optimum concentration of particles was determined to be 35 wt.% for both ashes. Higher ER yield stress (τ<SUB>y </SUB>= 135 Pa), higher ER efficiency (32.8), and better viscoelastic properties (τ<SUB>c</SUB> = 128 Pa, G = 680 kPa) under 3.0 kV mm<SUP>-1</SUP> applied electric field were obtained for 35CFA/SO suspension system compared to 35CBA/SO (τ<SUB>y</SUB> = 125 Pa, ER<SUB>eff</SUB> = 24.0, τ<SUB>c</SUB> = 55 Pa, G = 260 kPa). Although it was concluded that both ashes can be upcycled to sustainable and smart vibration damping alternative materials, better performance was observed for CFA particles.

Retrofit Solutions for Residential Buildings

Cali, Davide,Osterhage, Tanja,Muller, Dirk Sustainable Building Research Center 2011 International journal of sustainable building tech Vol.2 No.2

The complete refurbishment of nine buildings, each containing ten apartments of $72\;m^2$ is presented, and preliminary results are shown. The buildings have a different retrofit scenario in terms of insulation, heat production and delivery, domestic hot water production and air-handling systems. Following the energy saving ordinance for buildings in Germany of the year 2007 [1] each building has been evaluated. A monthly energy balance based on weather data from the German test reference year has been calculated for a one year period. The results show that depending on the refurbishment solution, the retrofit can reduce the energy demand up to 93%, and increases thermal comfort. Within the next three years, the buildings will be monitored in high time resolution. Physical models of the buildings and the components are under development using the modeling language Modelica, and will be validated through measured data. Once validated, the models will be used, for example, to elaborate regulation strategies for the plants and to create new virtual refurbishment versions in the direction of a zero-impact building.

Novel deletion of the E3A ubiquitin protein ligase gene detected by multiplex ligation-dependent probe amplification in a patient with Angelman syndrome

Cali, Francesco,Ragalmuto, Alda,Chiavetta, Valeria,Calabrese, Giuseppe,Fichera, Marco,Vinci, Mirella,Ruggeri, Giuseppa,Schinocca, Pietro,Sturnio, Maurizio,Romano, Salvatore,Romano, Valentino,Elia, Mau Korean Society for Biochemistry and Molecular Bion 2010 Experimental and molecular medicine Vol.42 No.12

Angelman syndrome (AS) is a severe neurobehavioural disorder caused by failure of expression of the maternal copy of the imprinted domain located on 15q11-q13. There are different mechanisms leading to AS: maternal microdeletion, uniparental disomy, defects in a putative imprinting centre, mutations of the E3 ubiquitin protein ligase (UBE3A) gene. However, some of suspected cases of AS are still scored negative to all the latter mutations. Recently, it has been shown that a proportion of negative cases bear large deletions overlapping one or more exons of the UBE3A gene. These deletions are difficult to detect by conventional gene-scanning methods due to the masking effect by the non-deleted allele. In this study, we have used for the first time multiplex ligation-dependent probe amplification (MLPA) and comparative multiplex dosage analysis (CMDA) to search for large deletions affecting the UBE3A gene. Using this approach, we identified a novel causative deletion involving exon 8 in an affected sibling. Based on our results, we propose the use of MLPA as a fast, accurate and inexpensive test to detect large deletions in the UBE3A gene in a small but significant percentage of AS patients.

Radionuclide and Heavy Metal Extraction Using Functionalised Magnetic Nanoparticles for Environmental Remediation

Stuart Aberdeen,E. Cali,L. Vandeperre,M.P. Ryan 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1

The ability to both assay the presence of, and to selectively remove ions in a solution is an important tool for waste water treatment in many industrial sectors, especially the nuclear industry. Nuclear waste streams contain high concentrations of heavy metals ions and radionuclides, which are extremely toxic and harmful to the environment, wildlife and humans. For the UK nuclear industry alone, it is estimated that there will be 4.9 million metric tonnes of radioactive waste by 2125, which contains a significant number of toxic radionuclides and heavy metals. This is exacerbated further by increased international growth of nuclear new build and decommissioning. Efforts to remove radionuclides have been focused on the development and optimisation of current separation and sequestering techniques as well as new technologies. Due to the large volumes of waste the techniques must be economical, simple to use and highly efficient in application. Magnetic nanoparticles (MNPs) offer a powerful enhancement of normal ion exchange materials in that they can be navigated to specific places using external magnetic fields and hence can be used to investigate challenges such as, pipework in preparation of decommissioning projects. They also have the potential to be fine-tuned to extract a variety of other radionuclides and toxic heavy metals. It has been demonstrated that with the right functional groups these particles become very strongly selective to radionuclides, such as Uranium. However, this new technology also has the potential to effectively aid nuclear waste remediation at a low cost for the separation of both radionuclides and heavy metals. In this work, we investigate the origin of the selectivity of superparamagnetic iron oxide nanoparticles (SPIONs) to Uranium by making systematic changes to the existing surface chemistry and determining how these changes influence the selectivity. Identifying the mechanism by which selected common nuclear related metals, such as Na(I), K(I), Cs(I), Ca(II), Cu(II), Co(II), Ni(II), Cd(II), Mg(II), Sr(II), Pb(II), Al(III), Mn(II), Eu(III) and Fe(III), are sorbed will allow for specific NP-target (nanoparticle) ion interactions to be revealed. Ultimately this understanding will provide guidance in the design of new targeted NP-ligand constructs for other environmental systems.

SHAPE OPTIMIZATION AND EXPERIMENTAL TEST OF AN INNOVATIVE POINT PIVOTED ABSORBER FOR WAVE ENERGY CONVERSION

Domenico Coiro,Giancarlo Troise,Giuseppe Calise,Nadia Bizzarrini 한국신재생에너지학회 2015 AFORE Vol.2015 No.11

An Assessment of the Knowledge, Attitude, and Practice Toward Standard Precautions Among Health Workers From a Hospital in Northern Cyprus

Abuduxike, Gulifeiya,Vaizoglu, Songul Acar,Asut, Ozen,Cali, Sanda Occupational Safety and Health Research Institute 2021 Safety and health at work Vol.12 No.1

Background: The objective was to assess the knowledge level, attitude, and practice of health care workers towards standard precautions, and to identify the related factors. Furthermore, it was attempted to identify the proportion of having the experience of needle stick injuries (NSIs) and associated factors among participants. Methods: A cross-sectional study was conducted in a teaching hospital among 233 health workers using a self-administrated questionnaire. The questionnaire included eight knowledge items, seven practice items, and five attitude items. Based on the mean score of each category, responses were grouped into "satisfactory" and "unsatisfactory". Univariate, bivariate, and multivariable logistic regression analyses were done. Results: The mean age of the participants 32.95 (SD ± 9.70) and 62.2% of them were women. 57.5% of the staff had a satisfactory level of correct knowledge (>5 correct answers), 37.3% had a satisfactory positive attitude (>3 correct answers), and 30.9% had a satisfactory practice (>3 correct answers) towards standard precautions. The occupation was one of the predictors as doctors were less likely to have satisfactory knowledge and practice compared to nurses (OR = 0.269, 95% CI: 0.10-0.70 and OR = 0.248, 95% CI: 0.08-0.77, respectively). Out of 174 participants, 31.6% of them reported experiencing NSIs and support staff were 71% less likely to experience NSIs compared to nurses & paramedics. Conclusion: The findings revealed a substandard adherence of standard precautions among participants, which highlighted the necessity of the provision of a periodic, tailored training program based on the occupation and risk exposure.

Gastroesophageal reflux after peroral endoscopic myotomy: a multicenter case-control study

Kumbhari, Vivek,Familiari, Pietro,Bjerregaard, Niels,Pioche, Mathieu,Jones, Edward,Ko, Weon,Hayee, Bu,Cali, Anna,Ngamruengphong, Saowanee,Mion, Francois,Hernaez, Ruben,Roman, Sabine,Tieu, Alan,El Zein Georg Thieme Verlag KG 2017 Endoscopy Vol.49 No.7

<B>Abstract</B><P> Background and study aims The variables associated with gastroesophageal reflux (GER) after peroral endoscopic myotomy (POEM) are largely unknown. This study aimed to: 1) identify the prevalence of reflux esophagitis and asymptomatic GER in patients who underwent POEM, and 2) evaluate patient and intraprocedural variables associated with post-POEM GER.</P><P> Patients and methods All patients who underwent POEM and subsequent objective testing for GER (pH study with or without upper gastrointestinal [GI] endoscopy) at seven tertiary academic centers (one Asian, two US, four European) were included. Patients were divided into two groups: 1) DeMeester score ≥ 14.72 (cases) and 2) DeMeester score of < 14.72 (controls). Asymptomatic GER was defined as a patient with a DeMeester score ≥ 14.72 who was not consuming proton pump inhibitor (PPI).</P><P> Results A total of 282 patients (female 48.2 %, Caucasian 84.8 %; mean body mass index 24.1 kg/m2) were included. Clinical success was achieved in 94.3 % of patients. GER evaluation was completed after a median follow-up of 12 months (interquartile range 10 - 24 months). A DeMeester score of ≥ 14.72 was seen in 57.8 % of patients. Multivariable analysis revealed female sex to be the only independent association (odds ratio 1.69, 95 % confidence interval 1.04 - 2.74) with post-POEM GER. No intraprocedural variables were associated with GER. Upper GI endoscopy was available in 233 patients, 54 (23.2 %) of whom were noted to have reflux esophagitis (majority Los Angeles Grade A or B). GER was asymptomatic in 60.1 %.</P><P> Conclusion Post-POEM GER was seen in the majority of patients. No intraprocedural variables were identified to allow for potential alteration in procedural technique. </P>