Evaluation of Filter Media Options for High Volume PM2.5 Sampling

2019 ◽  
Vol 35 (2) ◽  
pp. 205-209
Author(s):  
Huan Li ◽  
John D. Wanjura ◽  
William B. Faulkner ◽  
Ronald E. Lacey
Keyword(s):  
Standard Deviation ◽  
Glass Fiber ◽  
Cellulose Fiber ◽  
Sampling Technique ◽  
High Volume ◽  
Ambient Particulate Matter ◽  
Weight Changes ◽  
Filter Media ◽  
Replicated Measurements ◽  
Improved Performance

Abstract. Polytetrafluoroethylene (PTFE), glass fiber, and cellulose fiber filter media were evaluated under controlled conditions to determine their suitability for high volume PM2.5 sampling. Repeated mounting and unmounting events of new filters not exposed to ambient particulate matter were conducted in a laboratory environment and differences in the filter weight recorded. After the initial mounting and unmounting event, the filters exhibited weight changes of -2.24 mg, -0.61 mg, and 0.18 mg for cellulose, PTFE, and glass fiber filters, respectively. The standard deviation of replicated measurements after the first event was 1.76 (n = 9), 0.50 (n = 10), and 0.31 (n = 10) for cellulose, PTFE, and glass fiber filters, respectively. The combination of weight loss and standard deviation made the cellulose filter unsuitable for use in high volume PM2.5 samplers. However, improved performance over PTFE filters, suggests that glass fiber filters similar in specification to PTFE filters should be considered as acceptable substitutes in high volume PM2.5 sampling. Keywords: Air quality, Error, Filters, Measurement, Particles, Sampling technique.

scholarly journals Methodology to Create Reproducible Validation/Reference Materials for Comparison of Filter-Based Measurements of Carbonaceous Aerosols That Measure BC, BrC, EC, OC, and TC

Metrology ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 142-165
Author(s):  
Paul A. Solomon ◽  
Anna-Marie Hyatt ◽  
Anthony D. A. Hansen ◽  
James J. Schauer ◽  
Nicole P. Hyslop ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Glass Fiber ◽  
Reference Materials ◽  
Coefficient Of Variation ◽  
Total Carbon ◽  
Filter Media ◽  
Simple Method ◽  
Coated Glass ◽  
Optical Attenuation ◽  
Better Than

A simple method that reproducibly creates validation/reference materials for comparison of methods that measure the carbonaceous content of atmospheric particulate matter deposited on filter media at concentrations relevant to atmospheric levels has been developed and evaluated. Commonly used methods to determine the major carbonaceous components of particles collected on filters include optical attenuation for “Black” (BC) and “Brown” (BrC) carbon, thermal-optical analysis (TOA) for “Elemental” (EC) and “Organic” (OC) carbon, and total combustion for “Total” carbon (TC). The new method uses a commercial inkjet printer to deposit ink containing both organic and inorganic components onto filter substrates at programmable print densities (print levels, as specified by the printer–software combination). A variety of filter media were evaluated. The optical attenuation (ATN) of the deposited sample was determined at 880 nm and 370 nm. Reproducibility or precision (as standard deviation or in percent as coefficient of variation) in ATN for Teflon-coated glass-fiber, Teflon, and cellulose substrates was better than 5%. Reproducibility for other substrates was better than 15%. EC and OC measured on quartz-fiber filters (QFF) compared to ATN measured at 880 nm and 370 nm on either QFF or Teflon-coated glass-fiber yielded R2 > 0.92 and >0.97, respectively. Four independent laboratories participated in a round robin study together with the reference laboratory. The propagated standard deviation among the five groups across all print levels was <2.2 ATN at 880 nm and <2.7 ATN at 370 nm with a coefficient of variation of <2% at ~100 ATN.

PENGARUH TERAPI BACK MASSAGE TERHADAP PENURUNAN TINGKAT NYERI PADA PENDERITA RHEUMATOID ARTHRITIS DI DESA RAJADESA KECAMATAN RAJADESA KABUPATEN CIAMIS TAHUN 2018

2019 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Daniel Akbar Wibowo ◽  
Dini Nurbaeti Zen ◽  
Yalis Agustina
Keyword(s):  
Rheumatoid Arthritis ◽  
Standard Deviation ◽  
Muscle Tension ◽  
Massage Therapy ◽  
Sampling Technique ◽  
Total Sample ◽  
Measurement Tool ◽  
Pain Level ◽  
Average Value ◽  
Back Massage

Disease that is often complained by the public today one of the pain in the bone, which is better known by the community with rheumatism. Rheumatism or rheumatoid arthritis is a systemic, progressive, chronic and tendonic inflammatory disease of joints and connective tissue symmetrically. One way of management of rheumatoid arthritis pain is back massage therapy. Back Massage is one of the techniques to give massage action on the back with lotions/balm for 10-15 minutes, the warm sensation leads to vasodilation of blood vessels that will improve blood circulation in the area so that the activity of the cell is increased and will reduce pain, increase comfort, reduce muscle tension and improve physical and psychological relaxation. This study aims to determine the effect of Back massage therapy to decrease the pain level of rheumatoid arthritis patients in Rajadesa Village Rajadesa Sub District Ciamis District in 2018. Type of research using Quasi Experiment Design with one group pretest-posttest design. Total sample 48 respondents with total sampling technique. Data collection using experimental method with VDS (Verbal Descriptor Scale) pain rate measurement tool. The result of statistical test by using Linear Regression shows Sig = 0,000 <0,05, t value = 18,935> 2,012. Then Ha is accepted, and the average value before therapy is 3.27 with a standard deviation of 0.818, whereas after therapy is 2.23 with a standard deviation of 0.881, meaning there is the effect of back massage therapy on the decrease of pain level in patients with rheumatoid arthritis. So to reduce pain in patients with rheumatoid arthritis can be given back massage therapy.

scholarly journals Pengaruh Metode SPEOS (Stimulasi Pijat Endorfin Oksitosin Suggestif) Terhadap Produksi ASI Pada Ibu Nifas

2021 ◽  
Vol 3 (1) ◽  
pp. 18
Author(s):  
Elisa Elisa ◽  
Latifah Lely Septiariani ◽  
Kurniati Puji Lestari
Keyword(s):  
Standard Deviation ◽  
Breast Milk ◽  
Milk Production ◽  
Sampling Technique ◽  
Test Sample ◽  
Maternity Hospital ◽  
P Value ◽  
Central Java ◽  
Breast Milk Production ◽  
Post Test

Health profile of Semarang in 2018, the exclusive feeding of the exclusive breast milk in the age of 0-6 months of 65.57%. It’s still far from Central Java target of 80%. This problem of breastfeeding influenced by reduced stimulation of oxytocin hormones, while physical and psychological changes can affect the lactation process. One of the efforts to increase the breast milk production with SPEOS (Suggestive Endorphin Oxytocin Massage Stimulation). The SPEOS method can help nifas mother to facilitate the expenditure of breast milk. To know the effect of the SPEOS method (Suggestive Endorfin Oxytocin Massage Stimulation) on Breast Milk Production in Nifas Mothers. The research design used quasy experiment with one group pre-post test. Sample in this study was nifas mother with spontaneous childbirth amounted to 27 people. The sampling technique used consecutive sampling. Breastfeeding production before mothers performed SPEOS method on average was 3.70 ml with standard deviation of 5,113. Breast milk production after mother performed SPEOS method on average was 129,63 ml with standard deviation 11,001. There was an influence of SPEOS method to breast milk production on nifas mother at Maternity Hospital of Mardi Rahayu Semarang (p-value = 0,000). Stimulation Massage Endorphin Oxytocin SuggestifBreastmilk Production,Nifas Mother

scholarly journals Effect of Super Brain Yoga on Concentration and Memory in Children in a Selected Private School, Kelambakkam, Kanchipuram Dt, Tamilnadu, India

2021 ◽  
pp. 141-149
Author(s):  
V. S. Viji ◽  
S. Subbulakshmi ◽  
L. Uma Devi
Keyword(s):  
Standard Deviation ◽  
Standard Error ◽  
Private School ◽  
Sampling Technique ◽  
Demographic Variables ◽  
School Age ◽  
Long Period ◽  
Self Confidence ◽  
Positive Effect ◽  
Regular Practice

Background: The Sigmund Freud's psychosexual theory says that the school age is the important stage in the development of self-confidence. Many studies reveals that physical exercise has a positive effect in the cognitive intellectual areas of the children. Regular practice of simple exercise will makes the children more sharp minded and helps to give a better learning outcome Material & Methods: The main aim of the study was to evaluate the efficacy of super brain yoga by measuring the changes in concentration and memory in children.. A quantitative evaluative approach was used for this study with a one group pretest and posttest design. The purposive sampling technique was used to select 120 students aged between 10 to 12 years who were studying in 6th and 7th standard. The practice of super brain yoga was given 20 times over 10 minutes per day for a period of one month. The Digit Cancellation Test and the Knox Cube Test was used to was used to assess the pretest and posttest level of concentration and memory in children. Results: The pretest mean and standard deviation of concentration was 33.64±5.43 with a standard error of 0.496. The first posttest (at the end of second week of practice of super brain yoga) mean and standard deviation was 33.55± 5.378 with a standard error of 0.491 and the t-value was 0.749. The second posttest (at the end of fourth week of practice of super brain yoga) mean and standard deviation was 33.67±5.393 with a standard error of 0.492 and the t-value was 0.240. The pretest mean and standard deviation of memory was 33.67±4.696with a standard error of 0.429.The first posttest (at the end of second week of practice of super brain yoga) mean and standard deviation was 33.66±4.654with a standard error of 0.425 and the t-value was 0.080. The second posttest (at the end of fourth week of practice of super brain yoga) mean and standard deviation was 33.68±4.700with a standard error of 0.420and the t-value was 0.074. The present study result shows that statistically there was no significant effect of super brain yoga on concentration and memory of children and no association between posttest level of concentration and memory of children with their selected demographic variables. Conclusion: Hence the study concludes that the super brain yoga has no significant effect on concentration and memory of children with a duration of four weeks of practice.The study recommended that to bring the desired positive effect on children’s concentration and memory the study can be conducted for a long period of time.

scholarly journals HEAVY SMOKING

2012 ◽  
Vol 19 (04) ◽  
pp. 433-435
Author(s):  
MUMTAZ ALI SHAIKH ◽  
DUR-E- YAKTA ◽  
DARGAHI SHAIKH
Keyword(s):  
Standard Deviation ◽  
Urban Areas ◽  
Sampling Technique ◽  
Serum Lipoprotein ◽  
High Density Lipoproteins ◽  
Lipid Levels ◽  
Serum Triglycerides ◽  
Heavy Smoking ◽  
Female Ratio ◽  
Heavy Smokers

Objective: This study is conducted to observe the serum lipoprotein alterations in chronic heavy smokers in LUMHS Sindh. Study Design: Analytical study Material and Methods: It was conducted on 60 non obese adult smokers, both sexes, who smoked more than twenty cigarettes or beeries a day regularly for more than five years. All the participants were current smokers. Sampling technique was simple random technique. Setting: The study was conducted in outdoor department of LUMHS Jamshoro/Hyderabad. Period: Jan 2010 to Jan 2011. Eighteen hours fasting blood sample was sent for lipid studies. Lipids studied were serum cholesterol, serum triglycerides, high density lipoproteins and low density lipoproteins. For control values ATP 3 guidelines were used. Statistics: Mean of statistical values was calculated with standard deviation and variance in standard deviation. Results obtained were analyzed by SPSS 11. Results: Age of the patients was 25-70 years. Mean age was 47.81±12.96 years. Median age was 50 years. Male/ female ratio was 45/15. Patients were from both rural and urban areas. Mean duration of smoking was 25.5±9.15 years. The study carried out on 60 chronic heavy smokers, showed deranged lipid levels as: Total cholesterol mean 237.57 mg/dl ±37.89; TG mean 203.76 mg/dl ±47.08; LDL-C mean 158.62 mg/dl ±17.25; HDL-C mean 29.67 mg/dl ±3.12. Results are shown in Table No I. Conclusions: Our study concluded at LUMHS showed that by continuous heavy smoking the serum lipid levels get deranged.

scholarly journals The Effect of Aroma Therapy Olive Oil Massage to Pain Dysmenorrhea on Midwifery Level I and II Students at Tri Mandiri Sakti Institute of Health Sciences

2018 ◽  
Vol 25 (3) ◽  
pp. 22-32
Author(s):  
Tria Nopi Herdiani ◽  
Mika Oktarina ◽  
Yeni Nuraeni
Keyword(s):  
Standard Deviation ◽  
Olive Oil ◽  
Sampling Technique ◽  
Health Sciences ◽  
Pain Scale ◽  
Adolescent Women ◽  
Before And After ◽  
Post Test ◽  
Average Pain ◽  
Level I

Reproductive health problems are dysmenorrhea is a problem related with menstruation. research show the highest prevalence of menstrual pain in adolescent women, adolescent who experience dysmenorrhea report pain that interferes with daily activities. Handling to reduce pain during menstruation, one of which is using the olive oil aroma therapy aroma method. This research to determine the effect of aroma therapy olive oil massage pain dysmenorrhea on midwifery student level I and II Stikes Tri Mandiri Sakti Bengkulu.This study used a pre experiment in one group (one group pre-post test design) the dependent variable of pain before and after treatment. Sampling was done by accidental sampling technique using the criteria totaling 41 student who experience dysmenorrhea. The study was conducted from May to June 2017. Retrievel of data using the observatioan sheet and analyzed using compared mean paired T-test. The Result of the research: (1) At 41 people in the first and second grade obstetric students who had dysmenorrhea before the massive olive oil odor therapy aroma got the average pain scale 5,73 with the standard deviation 1,450. (2) In 41 subjects who had dysmenorrhea after the massage of olive oil odor therapy, the average pain scale was 5,00 with a standard deviation of 1,414. (3) There is massive effect of olive oil odor therapy to dysmenorrhea pain in female students of Level I and II Prodi DIII Midwifery Tri Mandiri Sakti Institute of Health Sciences Bengkulu. Keywords : aroma therapy, dysmenorrhea, massage 

scholarly journals PENGARUH LATIHAN SHADOW 8 TERHADAP AGILITY PADA PEMAIN BULUTANGKIS PB. MUSTIKA BANJARBARU USIA 12 – 15 TAHUN

2017 ◽  
Vol 16 (1) ◽  
Author(s):  
Taufiq Rahman ◽  
Herita Warni
Keyword(s):  
Standard Deviation ◽  
Sampling Technique ◽  
Experiment Design ◽  
T Test

This study aimed to determine the effects of exercise on agility in shadow 8 badminton players PB. Mustika Banjarbaru Age 12-15 Years. The method used is a method of pre-experiment design. The population in this study are all badminton player PB. Mustika Banjarbaru Age 12-15 Years of 10 people, while the sample in this study of 10 people with a sampling technique using total sampling.The results showed that the data pretest agility on a badminton player PB. Mustika Banjarbaru Age 12-15 Years gained an average = 7.1850 seconds with a standard deviation = 0.50423.  At posttest data is agility in badminton player PB. Mustika Banjarbaru Age 12-15 Years gained an average = 6.7500 seconds with a standard deviation = 0.44850. Results obtained by t test obtained t = 8.184> t table (9; 0.025) = 2.262, with Sig. (2-tailed) = 0,000; turns Sig. (2-tailed) <0.05  the t-count is significant. The conclusion that there was an effect on agility drills on shadow 8 badminton players PB. Mustika Banjarbaru Age 12-15 Years.Keywords: Effects, Exercise, Shadow 8, Agility and Badminton

scholarly journals Farmer Business School Participation in Ghana: Implications for Market Orientation, Entrepreneurial Proclivity and Livelihood Performance

2021 ◽  
pp. 1-6
Author(s):  
Enoch Kwame Tham-Agyekum ◽  
Fred Nimoh ◽  
John-Eudes Bakang ◽  
Jones Ebenezer Osei ◽  
Kwadwo Amankwah ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Market Orientation ◽  
Business School ◽  
Sampling Technique ◽  
T Test ◽  
School Participation ◽  
Multi Stage ◽  
Cocoa Farmer ◽  
Cocoa Farmers

The study assumes that participation in the Farmer Business School (FBS) gives the cocoa farmer an advantage over the non-participants. The following objectives were set to give an overall appreciation of the research; determine the extent to which participation in the FBS has influenced the market orientation of the cocoa farmers, determine the extent to which participation in the FBS has influenced the entrepreneurial proclivity of cocoa farmers and determine the extent to which participation in the FBS has influenced the livelihood of the cocoa farmers. With this in mind, 600 cocoa farmers were sampled in Ghana using the multi-stage sampling technique. Data were analyzed using mean, standard deviation, and the independent sample t-test. The results show that participation in the Farmer Business School indeed gives the cocoa farmers an advantage; market orientation (p<0.05), an entrepreneurial proclivity (p<0.05), and livelihood outcomes (p<0.05). There is a need to continually strengthen activities that promote these three key areas.

scholarly journals Socio-Demographic Determinants of Exclusive Breastfeeding Practices Among Nursing Mothers in Enugu State

2020 ◽  
Vol 5 (2) ◽  
pp. 15
Author(s):  
Anthonia C. Ogbe ◽  
Clementina U. Nwankwo ◽  
Theresa O. Agbele ◽  
Joshua C. Nwambo
Keyword(s):  
Standard Deviation ◽  
Exclusive Breastfeeding ◽  
Sampling Technique ◽  
Breastfeeding Practices ◽  
Multi Stage ◽  
Optimal Health ◽  
Nursing Mothers ◽  
Health And Development ◽  
Socio Demographic Factors ◽  
Structured Questionnaire

Exclusive breastfeeding (EBF) plays a pivotal role in determining the optimal health and development of infants with reduction in infant mortality. This study focuses on those factors which place nursing mothers in the likelihood of not adopting and practicing EBF. It is a descriptive study that utilized a multi-stage sampling technique. A structured questionnaire, mean and standard deviation were used. The result shows that the EBF practice among nursing mothers is high with a grand mean and standard deviation of 2.75 (0.61). Those with secondary qualification and below had 3.10(0.37) while tertiary had 2.23 (0.41). Mothers aged 25 and below had 3.39 (0.14) and above age 25 had 2.57(0.52).Parity of 1-4 had 2.93 (0.47) while parity of 5 and above had 1.93 (0.34). Married and single mothers had 2.75 (0.61) and 1.26 (0.05) respectively. Effective EBF education is needed to reduce socio-demographic factors that hinder mothers’ practice of EBF.

scholarly journals Knowledge on Post Exposure Prophylaxis of HIV among Nurses in a Hospital of Pokhara

2018 ◽  
Vol 7 (1) ◽  
pp. 57-66
Author(s):  
Manu Thapa ◽  
Bishnu Gurung
Keyword(s):  
Nursing Education ◽  
Standard Deviation ◽  
Health Care Providers ◽  
Sampling Technique ◽  
Education Programme ◽  
Post Exposure Prophylaxis ◽  
Care Providers ◽  
Cross Sectional ◽  
Post Exposure ◽  
Exposure Prophylaxis

Health care providers are at risk of acquiring human immunodeficiency virus (HIV) infection from occupational exposure, with nurses being the most vulnerable. Post exposure prophylaxis (PEP) of HIV is the only way to reduce risk of HIV after potential exposure. A study was conducted on Nurses Knowledge on PEP of HIV at Gandaki Medical College (GMC), Pokhara to find out the knowledge on PEP of HIV among nurses. Descriptive cross sectional research design was used for the study. Probability stratified systematic random sampling technique was used for sampling and self administered questionnaires was used for data collection with sample size of 90 nurses working in GMC. The data was analyzed using Statistical Package for Social Science (SPSS) version 20 software programme and presented in terms of frequency distribution, percentage, mean and standard deviation. For inferential statistics, chi square test was used at 5% level of significance. The findings of the study revealed that mean age of the respondents was 24.57 with standard deviation 3.43. Out of 90 respondents majority (83.3%) of the respondents were PCL passed and 47.8% of the respondents had adequate knowledge regarding PEP of HIV. The study found no significant association between demographic variables and knowledge level. It can be concluded that the nurses need to improve their level of knowledge on PEP of HIV by participating in different training programs. Health institution should also conduct continue nursing education programme to improve and update knowledge among the employees.

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