Numerous models are proposed to model international trade and promote it. Vanek, instead of designing a trade pattern based on the production, introduced a pattern based on the factor content of trade. In the present study, apart from the Heckscher-Ohlin-Vanek (HOV) theorem, we attempt to determine the factor content of Iran's trade without factor price equalization by using internal input-outp...

Quantum Monte Carlo simulations, while being efficient for bosons, suffer from the "negative sign problem" when applied to fermions--causing an exponential increase of the computing time with the number of particles. A polynomial time solution to the sign problem is highly desired since it would provide an unbiased and numerically exact method to simulate correlated quantum systems. Here we sho...

Negative polarity items emerge from the interaction between some propertiesof semantic module of human language and its lexicon. This leads tothe expectation that they should be equally common in spoken sign language,contrary to what has been documented. We describe UNTIL French SignLanguage, Italian Sign Language Netherlands. showthat under punctual reading, behaves as a strong negative item,j...

Abstract In a study of student understanding negative definite integrals at two institutions, we administered written survey and follow-up clinical interviews one institution found that “backward integrals”, where the integral was taken from right to left on x -axis, were most difficult for students interpret. We then conducted additional focused backward second institution. Our analysis uses c...

BACKGROUND CONTEXT The nerve root sedimentation sign in transverse magnetic resonance imaging has been shown to discriminate well between selected patients with and without lumbar spinal stenosis (LSS), but the performance of this new test, when used in a broader patient population, is not yet known. PURPOSE To evaluate the clinical performance of the nerve root sedimentation sign in detectin...

Quantum Monte Carlo method is applied to fractional quantum Hall systems. The use of the linear programming method enables us to avoid the negative-sign problem in the Quantum Monte Carlo calculations. The formulation of this method and the technique for avoiding the sign problem are described. Some numerical results on static physical quantities are also reported.

BACKGROUND Diagnostic difficulties are common in sigmoid volvulus. This diagnostic delay contributes to high morbidity and mortality. AIM This paper recognises visible or palpable emptiness of the left iliac fossa as a new clinical sign of sigmoid volvulus. Predictive accuracy of the sign was assessed in this study. METHODS 519 patients with acute abdomen of non-traumatic origin were prospe...