Characteristics of New Firms: A Comparison by Gender

Based on data from the Kauffman Firm Survey, compares characteristics of the owner, type of business, industry, financing, size, and performance of new firms owned by women and by men. Considers the factors behind women-owned firms' underperformance

Fundamental Researcher Attributes: Reflections on Ways to Facilitate Participation in Community Psychology Doctoral Dissertation Research

As novice researchers, Community Psychology doctoral students encounter fresh challenges when they attempt to facilitate participation by members of the community in their dissertation projects. This article presents the merit in adopting fundamental researcher attributes, which have been described in published academic literature as personal characteristics that facilitate participation by members of the community in research studies. The value of these researcher attributes is exemplified in the discussion of one of the author’s experiences in the early stages of his dissertation research process. This article also presents new researcher attributes for facilitating participation by community members that the author recognised after critical reflection on his experiences during the same research process. Cultural humility, shared vulnerability, reflexivity, methodological flexibility, academic assiduity and creative resourcefulness are researcher attributes doctoral students should consider adopting and developing if they intend to facilitate participation by members of the community in their dissertation projects

An Overview of the Kauffman Firm Survey: Results From 2009 Business Activities

Highlights findings from longitudinal data on new businesses' performance since 2004 as well as new firms founded in 2009, including trends in customer payment problems and loan denials, financial injections, and sources of comparative advantage

Portable machine welding head automatically controls arc

Portable weld tool makes weld repairs out-of-station and on the side opposite the original weld. It provides full automatic control of the arc voltage, current, wire feed, and electrode travel speed in all welding attitudes. The device is readily adaptable to commercially available straight polarity dc weld packs

Casting a Wide Net: Online Activities of Small and New Businesses in the United States

Examines trends in businesses' use of Web sites and e-mail, online sales, and outcomes of such online activities by industry, age and size of firm, and owners' race/ethnicity, gender, location, and education

An Overview of the Kauffman Firm Survey: Results From 2010 Business Activities

Examines longitudinal data on new businesses' survival and performance since 2004 as well as new firms founded in 2010, including trends in slow or lost sales, predictability of business conditions, credit availability, and product or service innovation

Modelling of AlAs/GaAs interfacial structures using high-angle annular dark field (HAADF) image simulations

High angle annular dark field (HAADF) image simulations were performed on a series of AlAs/GaAsinterfacial models using the frozen-phonon multislice method. Three general types of models were considered—perfect, vicinal/sawtooth and diffusion. These were chosen to demonstrate how HAADFimage measurements are influenced by different interfacialstructures in the technologically important III–V semiconductor system. For each model, interfacial sharpness was calculated as a function of depth and compared to aberration-corrected HAADF experiments of two types of AlAs/GaAs interfaces. The results show that the sharpness measured from HAADF imaging changes in a complicated manner with thickness for complex interfacialstructures. For vicinal structures, it was revealed that the type of material that the probe projects through first of all has a significant effect on the measured sharpness. An increase in the vicinal angle was also shown to generate a wider interface in the random step model. The Moison diffusion model produced an increase in the interface width with depth which closely matched the experimental results of the AlAs-on-GaAs interface. In contrast, the interface width decreased as a function of depth in the linear diffusion model. Only in the case of the perfect model was it possible to ascertain the underlying structure directly from HAADFimage analysis

Entrepreneurship, Self-Employment and Business Data: An Introduction to Several Large, Nationally-Representative Datasets

Only a few large, nationally-representative datasets include information on both the owner and the business. We briefly describe several of the most respected and up-to-date sources of data on entrepreneurs, the self-employed, and small businesses. More information including estimates of recent trends in business ownership and performance (e.g. survival rates, sales, employment, payroll, profits and industry) from these datasets is contained in Fairlie and Robb (2008).small businesses, business owners, self-employment, entrepreneurship, data

Four wave mixing with self-phase matching due to collective atomic recoil

We describe a method for non-degenerate four-wave mixing in a cold sample of 4-level atoms. An integral part of the four-wave mixing process is a collective instability which spontaneously generates a periodic density modulation in the cold atomic sample with a period equal to half of the wavelength of the generated high-frequency optical field. Due to the generation of this density modulation, phase-matching between the pump and scattered fields is not a necessary initial condition for this wave-mixing process to occur, rather the density modulation acts to "self phase-match" the fields during the course of the wave-mixing process. We describe a one-dimensional model of this process, and suggest a proof-of-principle experiment which would involve pumping a sample of cold Cs atoms with three infra-red pump fields to produce blue light.Comment: to appear in Physical Review Letter