SELECT SQL_CALC_FOUND_ROWS posting_id, rw1.node_name AS subject, rw2.node_name AS topic FROM posting, rewrite_sol_bm AS rw1, rewrite_sol_bm AS rw2 WHERE ota_id=103846 AND type=1 AND library_status=1 AND posting.subject_id=rw1.subject_id AND posting.topic_id=rw2.topic_id AND rw1.node_type=1 AND rw2.node_type=2 ORDER BY library_downloads DESC LIMIT 40, 20 Online TA Profiles - Homework Help from BrainMass
Online TA Profiles
Yinon Shafrir, PhD
OTA ID#: 103846

Education Experience: BA, Physics, Technion, Israel Institute of Technology, 1995
MSc, Physics, Clarkson University, NY, 1998
PhD, Physics, Clarkson University, NY, 2001
Focus of Study: Computational Biological Physics.
Awards: Cancer Reseach Training Award - National Cancer Institute.
Publications: Ph.D. Thesis:
The Cytoskeleton and Signaling: Computer Modeling Based on Percolation.

¡¤ Shafrir Y, Forgacs G. Mechanotransduction through the cytoskeleton. Am J Physiol Cell Physiol. 2002 Mar;282(3):C479-86.

¡¤ Shafrir Y, ben-Avraham D. Large Scale Simulations of Two-Species Annihilation, A + B ¡ú 0, with Drift. Physics letters A. 2001 Jan 278;(4) 184-190.

¡¤ Shafrir Y, ben-Avraham D, Forgacs G. Trafficking and signaling through the cytoskeleton: a specific mechanism. J. Cell Sci. 2000 Aug;113 ( Pt 15):2747-57.
Work Experience: Research fellow at the National Cancer Institute.
Skills & Achievements: Have worked as a research assistant throughout my academic studies.

My research experience ranges from optics to biophysical studies of tissues.
Outside Interests: Music, Cooking and Hiking.
Postings Answered: 2222
Cumulative OTA Rating: 5/5  What is OTA Rating?
Top Solutions Downloads
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  1. Physics (solving for optimal diameter of rope to support given weight) - An artist friend of yours needs help hanging a 500 lb sculpture from the ceiling. For artistic reasons, she wants to use just two ropes. One will be 30 degrees from vertical, the other 60 degrees. She ...
  2. Electric fields, Gauss and Coulomb - 1. A tiny ball (mass = 0.015 kg) carries a charge of -20 µC. What electric field (magnitude and direction) is needed to cause the ball to float above the ground? 2.At a distance r1 from a point c ...
  3. The mobile in the figure below is in equilibrium. - The mobile in the figure below is in equilibrium. The object B has mass of 0.860 kg. Determine the mass of object C. Assume L1 = 30.6 cm, L2 = 7.90 cm, L3 = 15.0 cm, L4 = 5.00 cm, L5 = 16.9 cm and L6 ...
  4. Where should a pilot start decent? - (See attached file for full problem description) --- An approach path for an aircraft is shown in the figure and satisfies the following conditions: ---
  5. Eukaryotic Cells - Often, prokaryotic cells exist as simple unicellular organisms, but in some species, prokaryotic cells can grow together in colonies or filaments. In addition, some species, such as Cynaobacteria or ...
  6. Geometric sequence - Please show how you arrived at the following solution Use the geometric sequence of numbers 1, 2, 4, 8,..... to find the following : a. What is r, the ratio between 2 consecutive terms b. ...
  7. Algebra -In the real world, where might these so-called imaginary numbers be used? - 1. When solving a quadratic equation using the quadratic formula, it is possible for the b2 - 4ac term inside the square root (the discriminant) to be negative, thus forcing us to take the square root ...
  8. Equation of a Line - See attached file for full problem description.
  9. {21.24} A 3kg particle has a velocity of (3i-4j) m/s. Find the magnitude of its momentum? - A 3kg particle has a velocity of (3i-4j) m/s. Find the magnitude of its momentum? ============================================= Answers: a) 9kg m/s b) -12 kg m/s c) 15 kg m/s d) 3 kg m/s ###### ...
  10. Faraday's Law of Electromagnetic Induction - A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.84 V and a current of 3.7 A are induced in the coil. The wire ...
  11. Effects of higher MPG in US petroleum consumption - Petroleum consumption in the US in 1990 supplied about 33.7E15 kJ of energy. Of this quantity, about 15.9E15 kJ was supplied by foreign sources. The transportation sector is the major user of petrol ...
  12. Series problem - I got a answer but it didn't make sense here is my question again. A farmer is going to grant a sales man a reward for good work. So, the salesman said, "If you insist, I do not want much. Get your ...
  13. Graph/Lagrange Multipliers - The plane, 4*x - 3*y + 8*z = 5, intersects the cone, z^2 = x^2 + y^2, in an ellipse. 1. Graph the cone, the plane and the ellipse 2. Using lagrange multipliers find the highest and lowest points ...
  14. The surface of the Earth shows fewer meteror impact craters when compared to the surface o Mercury or our own Moon, which show thousands of impact craters each? Think of four specific reasons to explain this. For each reason, indicate what has an effect on the nember of craters seen. - The surface of the Earth shows fewer meteor impact craters when compared to the surface of Mercury or our own Moon, which show thousands of impact craters each? Think of four specific reasons to expl ...
  15. Linear algebra equations - 1) Find the degree measure of the angel marked Z 2) High-Risk Funds Of the $50,000 that Natasha pocketed on her last real estate deal, $20,000 went to charity. She invested part of the remainder i ...
  16. Momentum - two blocks connected by a spring - A system is composed of two blocks of mass M1 and mass M2 connected by a massless spring with spring constant k. The blocks slide on a frictionless plane. The unstrechted length of the spring is L. In ...
  17. Problem 7.24 - A 5.0-m-diameter merry-go-round is initially turning with a 4.0 s period. It slows down and stops in 20 s. a) Before slowing, what is the speed of a child on the rim? (in m/s) b) How many revolu ...
  18. Electricity Problems (Magnetic Flux; Magnetic Field; Current; Voltage; Energy; Resistance; Reactance; Frequency) - I need help with the attached electricity problems. Example: 1) A piece of copper wire is formed into a single circular loop of radius 17 cm. A magnetic field is oriented parallel to the normal to ...
  19. Sets and counting - Six people are going to travel to Mexico City by car. There are six seats available in the car. In how many different ways can the six people be seated in the car if only three of them can drive?
  20. earth center hyposthesis/sun center hypothesis - How can planet retrograde motion be explained by the Earth center hypothesis? By the Sun-center hypothesis? (In about 75 words)
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