TSC Ratings provides exclusive stock, ETF and mutual fund recommendations using proprietary tools. Our "safety first" approach aims to reduce risk while achieving total return performance.The following mid-cap companies have market values between $500 million and $10 billion and receive "buy" ratings from our proprietary quantitative model, which considers more than 60 factors. The stocks are ordered by their potential to appreciate. Landauer ( LDR) offers personnel radiation monitoring to measure the dosage of X-ray, gamma and other radiation to which a person has been exposed. The numbers: Fiscal second-quarter revenue increased 5% to $25 million as net income and earnings per share fell 16% to $5.4 million and 58 cents, respectively. The operating margin remained steady 42% and the net margin fell to 22%. The company has no debt or interest expenses and a quick ratio of 1.9 indicates ample liquidity. The stock: Landauer has fallen 7% in 2009, underperforming the Dow Jones Industrial Average and the S&P 500. The stock offers a 3.2% dividend yield and trades at an expensive price-to-earnings ratio of 27. New Jersey Resources ( NJR) is an energy-services company that provides retail and wholesale energy services to customers in New Jersey and other states from the Gulf Coast to New England. The numbers: Fiscal second-quarter revenue declined 20% to $938 million as net income and earnings per share surged 183% to $36 million and 83 cents, respectively. The operating margin inched past 6% and the net margin climbed to 4%. The debt-to-equity ratio is low at 0.6, but a quick ratio of 0.4 indicates weak liquidity. The stock: New Jersey Resources has fallen 2% in 2009, underperforming the Dow and S&P 500. The stock trades at a price-to-earnings ratio of 14 and offers an attractive 3.2% dividend yield.