H-1B Visas Essential to Attracting and Retaining Talent in America

H-1B temporary visas have been an essential avenue for allowing high-skilled foreign nationals to work in America. The "Gang of 8" Senate immigration bill would dramatically change employment-based immigration policy, attempting through a variety of means to discourage or, in some cases, prohibit the use of H-1B visas, while providing more employer-sponsored green cards (for permanent residence). Research indicates measures to restrict the use of H-1B visas are not based on sound evidence and would represent a serious policy mistake that would shift more work and resources outside the United States and harm the competitiveness of U.S. employers

Addendum to "Experimental demonstration of a quantum protocol for Byzantine agreement and liar detection" arXiv:0710.0290

Gao et al. [Phys. Rev. Lett. 101, 208901 (2008)] have described a possible intercept-resend attack for the quantum protocol for detectable Byzantine agreement in Phys. Rev. Lett. 100, 070504 (2008). Here we describe an extension of the protocol which defeats such attacks.Comment: REVTeX4, 2 page

Multi-scale simulation of capillary pores and gel pores in Portland cement paste

The microstructures of Portland cement paste (water to cement ratio is 0.4, curing time is from 1 day to 28 days) are simulated based on the numerical cement hydration model, HUMOSTRUC3D (van Breugel, 1991; Koenders, 1997; Ye, 2003). The nanostructures of inner and outer C-S-H are simulated by the packing of monosized (5 nm) spheres. The pore structures (capillary pores and gel pores) of Portland cement paste are established by upgrading the simulated nanostructures of C-S-H to the simulated microstructures of Portland cement paste. The pore size distribution of Portland cement paste is simulated by using the image segmentation method (Shapiro and Stockman, 2001) to analyse the simulated pore structures of Portland cement paste. The simulation results indicate that the pore size distribution of the simulated capillary pores of Portland cement paste at the age of 1 day to 28 days is in a good agreement with the pore size distribution determined by scanning electron microscopy (SEM). The pore size distribution of the simulated gel pores of Portland cement paste (interlayer gel pores of outer C-S-H and gel pores of inner C-S-H are not included) is validated by the pore size distribution obtained by mercury intrusion porosimetry (MIP). The pores with pore size of 20 nm to 100 nm occupy very small volume fraction in the simulated Portland cement paste at each curing time (0.69% to 1.38%). This is consistent with the experimental results obtained by nuclear magnetic resonance (NMR)

Immigration: Legislative Issues on Nonimmigrant Professional Specialty (H-1B) Workers

CRS ReportCRSImmigrationH1Bissues0601.pdf: 219 downloads, before Oct. 1, 2020

H-2B Visa Program: Closed Civil Criminal Cases Illustrate Instances of H-2B Workers Being Targets of Fraud and Abuse

A letter report issued by the Government Accountability Office with an abstract that begins "The H-2B visa program assists U.S. employers anticipating a shortage of domestic nonagricultural workers by permitting them to hire nonimmigrant foreign workers temporarily. The program is overseen by several agencies, including the Department of Labor (Labor), the Department of Homeland Security's United States Citizenship and Immigration Services (USCIS), and the Department of State. Employers often hire labor recruiters or other intermediaries to assist with the process of obtaining labor certifications and finding foreign workers. GAO was asked to determine if there were examples of recruiters and employers engaging in illegal or fraudulent activity within the H-2B visa program. GAO reviewed recent closed civil and criminal court cases involving H-2B workers, obtained data from Labor and USCIS on H-2B visas issued in fiscal years 2008 and 2009 and in first 6 months of fiscal year 2010, and interviewed advocacy groups that represent H-2B workers in litigation. In addition, GAO made undercover calls and site visits to recruiters, posing as H-2B employers and foreign H-2B workers and asked a series of questions related to legal requirements of the program. GAO also visited several H-2B housing and work site locations. Case studies and results of tests and site visits cannot be projected to the entire population of H-2B employers and recruiters.

H-1Bs: How Do They Stack Up to US Born Workers?

Combining unique individual level H-1B data from U.S. Citizenship and Immigration Services (USCIS) and data from the 2009 American Community Survey, we analyze earnings differences between H-1B visa holders and US born workers in STEM occupations. The data indicate that H-1Bs are younger and more skilled, as measured by education, than US born workers in the same occupations. We fail to find support for the notion that H-1Bs are paid less that observationally similar US born workers; in fact, they appear to have higher earnings in some key STEM occupations, including information technology.temporary workers, H-1B, immigration, high-skill, STEM