Aug 6, 2018 - (July 28, 2018) at a sensitisation programme organised by the. University ..... of students and pupils, acquisition of ICT skills, promotion ..... A.S. YUSUF, FCA ... University of Ilorin (ASUU) Academic Earned Allowance Batch L.
Aug 1, 2016 - and USDA-accredited veterinarians and may be obtained as provided in subsection 5C-4.0016(3), F.A.C. Depending ... 585.145(2) FS. Law Implemented 585.08(2)(a), 585.145(1) (2) FS. History-New 6-21-06. 5C-4.0017 General Requirements, Exem
Sep 11, 2016 - If you plan to use a GPS to get to the park, MOST GPS WILL SEND YOU TO WASHINGTON CROSSING ... From Route 202. Follow Rt. 202 to New Hope. Exit at Rt. 32/River Road. Continue on Rt. 32. The park entrance will be approximately 4 miles f
Aug 1, 2016 - Affidavit for Show Ring Participation .... Parking permits will be available at checku in. 7. If any emergencies, contact the Fair Office at (321) 697u 3050. 8. Pens will be assigned according to the .... damage to property, whether suc
A PARENT'S GUIDE TO .... Feel the difference between words them (voiced) and think (unvoiced). Goal: ... Once child is accurate with sound level discrimination, we will work on discriminating the. 1st sound at the start of words. Minimal pairs are ra
LF 300W peak power (Class-D) ... Two Fast Recoveryâ¢ amplifiers ... Class AB. Electronic Crossover. Crossover Type. 24 dB / octave. Crossover Frequency. 3 kHz .... 39.0 lb [17.7 kg]. 5aT`dT]Rh 7i. ">RcPeTATb_^]bT. S1B?;/! '"E. 20. 00. 000.
Parts Dept. (800)424-TRUE â¢ Parts Dept. Fax# (636)272-9471 â¢ www.truemfg.com. Model: TRUE FOOD SERVICE. EQUIPMENT, INC. Project Name: Location: Item #:. Qty: Model #:. AIA #. SIS #. Printed in U.S.A.. APPROVALS: ... distribution to assure even te
If you want to possess a one-stop search and find the proper manuals on your products, you can visit this website that delivers many Cost Accounting A ...
its own (autonomously). ... before, right? How does your knowledge of peripheral vision help. I you understand what the peripheral nervous system is? it's alvvays good to create mental linkages between what you're ... I _ âThe body is made up ofmil
All Rights Reserved. Acer Projector User's Guide ... Follow all warnings and instructions marked on the product. Turning the .... and free flow of air around the projector are necessary. â¢. Locations ..... 20 SHARP. Press to open the Sharpness adju
BO. U. T. TH. E. REPORT. Our 2016 Sustainability Report is the sixth consolidated report describing the sustainability performance and associated achievements of Zain Group. The report provides transparent, in-depth reporting on the socio- economic a
PDF File: Automotive Technology A Systems Approach Th Edition Review Questions ... PDF-ATASATERQA-19-8 | 82 Pages | Size 5,846 KB | 15 Jan, 2015.
The Biscayne Lady is an ideal venue to hold a multifaceted event. Our interior lighting can be dimmed to create the perfect evening cocktail party. Our stereo ...
3-1/2" (89mm) casters â 2 rigid, and 2 swivel with brake. Oven is controlled by one (1) ... l HALO HEAT . . . a controlled, uniform heat source that maintains.
experience and dispositions. â¢ Teacher certification from an internationally recognized authority. â¢ At least three years experience teaching in an accredited school. â¢ Experience working with and developing high quality curriculum. (IPC, IMYC,
a beach day @. Dunsborough Foreshore. 12-4pm. Kayak, SUP and pedal boat activities as well as live music from our DJ. FREE. @ 10 am Busselton. Skatepark. Only $10. Get in contact to book a place. @ Busselton Youth. Precinct &. SkatePark. 5:30-8:30pm.
low shrinkage of bulk or portion-cut protein items, higher food moisture content, and significantly longer holding life. l Cooks, roasts, re-heats, and holds in the same cabinet with ... FAX: 262.251.7067 800.329.8744 U.S.A. ONLY www.alto-shaam.com.
education agencies are expected to maintain, collect, and report data on race and ethnicity. .... Residence Address (proof of residency is required) / Domicilio.
42'6â (12.95 m) Maximum forward reach. â¡ 400 lbs (181 kg) ... 3,000 lbs (1,361 kg) Capacity @ maximum forward reach. (on outriggers) ... Sales Inquiries: 1-877-755-4387 (1-877-SJLIFTS). Main Switchboard: 1-800-265-2738. Phone: 519-837-0888. Fax:
and play a part in Vietnam's development and integration into the world. Phase 1. A modern purpose built ... will follow TH School's philosophy and educational program enrolling 350 grade. 6 â 12 day and boarding ... Develop a Teacher Training Inst
We cannot do this alone and we need you on our team. We look forward to building and maintaining strong partnerships with our students, parents, additional caretakers, and community members. In partnership with you, we will work hard to be relentless
TH School is seeking talented student centered educators to join our current cadre of 12 highly qualified expatriate teachers for the 2017 â 2018 school year. Desired qualifications, experience and dispositions: â¢ Teacher certification from an in
evidence based studies and each person is given their macronutrient and calorie breakdown. Fitness should fit ... My coaching is geared towards those who have experience in a weights room and have been adhering to ... your own profile on my app where
Auxiliary hydraulics. â¡ Engine block heater ... Hydraulic test ports. â¡ Lockable in cab storage box ... Pneumatic 14 x 24 16PR Grip Lug. ATTACHMENTS. â¡ 48â ...
Alpha radiation doses to the eyes of individuals wearing optical glasses
B. Elouardi, M.A.Misdaq, A. Mortassim Nuclear Physics and Techniques Laboratory, Faculty of Sciences Semlalia, BP. 2390, University of Cadi Ayyad, Marrakech, Morocco (URAC-15 Research Unit Associated to the CNRST, Rabat, Morocco).
Optical glasses are presently utilized by a great number of individuals to correct vision weakness. Two types of solid state nuclear track detectors were used for measuring uranium (238U), thorium (232Th), radon (222Rn) and thoron (220Rn) contents in various optical glasses as well as radon and thoron in air. Radiation doses to eyes of individuals due to alpha-particles emitted by the 238U and 232Th series inside the studied optical glasses and those emitted by the radon and thoron series in air were evaluated. The influence of the nature of the optical glasses as well as radon concentration in air on radiation doses received by individuals wearing optical glasses was studied. Radiation doses were found higher for persons wearing mineral optical glasses than for those wearing organic optical glasses.
kK Rn S RnW R Rn t e sample 222 Ac ( Rn )(1 e )w T 2d skin S skin Rn
sample 232 A ( U ) is the alpha activity due to Where A nside an optical glass sample. C ( Th ) is the alpha activity due to 232Th inside an optical glass sample. ACsample ( 222Rn ) is the alpha activity due to 220Rn inside an optical glass sample. λ U is the radioactive decay constant for 238U. λ Th is the radioactive decay constant for 232Th . λ Rn is the radioactive decay constant for 222Rn. te is the exposure time. WT = 0.01 is the tissue weighting factor for ski (ICRP 2002) . KU is the branching ratio for disintegration. is the branching ratio for 238U disintegration. KTh is the branching ratio for 232Th disintegration. KRn is the branching ratio for 222Rn disintegration dskin is the density of skin (g cm-3). Sskin is the surface eye (cm2) (ICRP 1990). K=1.6 10-13 (J MeV-1) is a conversion factor. SU is the stopping power of skin for the alpha particles emitted by 232Th (MeV cm2 g-1). is the stopping power of eye for the alpha particles emitted by (MeV cm2 g-1).SRn is the stopping power of eye for the alpha particles emitted by 222Rn (MeV cm2 g-1). sample C
Introduction Uranium and thorium contents have been betermined in different geological materials by using chemical or instrumental methods. These techniques are expensive and need standards for their calibaration. In a previous article we developed an experimental method for determining uranium and thorium contents in different geological samples by using solid state nuclear track detectors (SSNTD). In this work, we describe a new calculation method, adapted to the experimental conditions, for determining directly thorium and uranium contents in different optical glass samples. We also estimed alpha doses received by individuals wearing optical glasses. The necessary ranges of α-particles emitted by the uranium and thorium series, in the considered materials were calculated by means of a TRIM programme.
Results Different optical glass samples have been collected and their uranium, thorium, and radon concentrations have been determined. Data obtained are shown in Table1. The relative uncertainty on the uranium, thorium, and radon concentration determination is of 8%.
Methodology Disk shaped CR-39 and LR-115 type II SSNTD have been separately placed on an optical glass sample in a closed cylindric plastic container of 4 cm diameter and 1 cm depth for one month (Fig. 1). During this time α-particles emitted by the and thorium (232Th), uranium (238U) and their daughters bombarded the SSNTD films. After the irradiation, the bombarded LR-115 II CR-39
SSNTD were developed in a NaOH solution (2.5M at 60 °C during 120 minutes for LR-115 films and 6,25M at 70 °C during 7 hours for the CR-39 ones). After this chemical treatment the CR-39 and LR-115 α-particle track densities were determined by means of an ordinary microscope. The global density of tracks due to the α-particles of the uranium and thorium series, registered on the CR39 and LR-115 type II SSNTD are giver by:
8 7 C (Th ) CR CR C (U )d s AU (Bq / g ) K j Pj R j ATh (Bq / g ) C (U ) K j Pj R j j 1 j 1
C (U )d s AU (Bq / g )8P R ATh (Bq / g )6P R LR G
C (Th ) C (U )
Committed effective doses to the eyes of individualswearing the studiedoptical glass samples due to 238U, 232Th and 222Rn have been evaluated. Data obtained are shown in Table 2.Radiation doses were found higher for persons wearing mineral optical glasses than for those wearing organic optical glasses.
Combining Eqs (1) and (2), we obtain the following relationship between track densities And thorium to uranium ratios
CR G LR G
AU (Bq / g ) K j P j 1
8AU (Bq / g )P
R j ATh (Bq / g )
C (Th ) C (U )
R 6ATh (Bq / g )P
Optical glass sample
C (Th ) C (U )
) Knowing , GLR , P and P LR one an determine the CC ((Th ratio and consequently the thorium C (Th ) and U) uranium C (U ) contents in an optical glass sample. Committed effective doses ( Sv y-1 cm-2) to eye due to 238U, 232Th and 222Rn from wearing optical glasses by individuals are respectively given by (Misdaq and Outeqablit 2010): CR G
kK Th S ThW R Th t e sample 232 Ac ( Th )(1 e )w T 2d skin S skin Th
References Misdaq, M.A., Khajmi, H., Aitnouh, F., Berrazzouk, S. and Bourzik, W. A new methode for evaluatig uranium and thorium contents in different natural material samples by calculating the CR-39 and LR-115 type II SSNTD detection effeciencies for the emitted α- particles. Nucl. Instrum. Methods Phys. Res. B171(3), 350- 359 52000).  International Commission on Radiological Protection. Recommendations of the International Commission on Radiological Prote ction. Recommendations of the International on Radiological protection . ICRP Publication 89; Ann. ICRP 32 (3-4); 2002. International Commission on Radiological Protection. Recommendations of the
International Commission on Radiological Publication 60; Ann ICRP 21 (1–3); 1990.