Shares of

Hoku Scientific

(HOKU)

were among technology's winners Friday, surging 40% after the maker of fuel cells and "clean energy" products announced details for a planned polysilicon plant and was upgraded by Piper Jaffray.

Late Thursday, Hoku said it awarded a contract to Denver-based firm CH2M Hill Lockwood Greene to provide engineering and related services for its polysilicon production plant. Piper Jaffray upgraded the stock Friday to outperform from market perform, citing a low valuation and increased visibility about the company's polysilicon strategy. Hoku shares were trading at $4.71, up $1.27. Trading volume at midday was more than 3 million shares, compared with the average daily volume of roughly 256,000 shares.

Shares of

Ansoft

(ANST)

jumped 15% after the software company's first-quarter results topped estimates. For the period ended July 31, the company earned $2.3 million, or 9 cents a share, on revenue of $17.3 million. Analysts polled by Thomson First Call expected earnings of 8 cents a share on revenue of $16.8 million. During the year-earlier period, the company earned $1.2 million, or 5 cents a share, on revenue of $14.8 million. Shares were trading up $3.03 to $23.30.

Skillsoft

(SKIL)

rose 2% after the maker of Internet-based employee-training courses reported better-than-expected second-quarter results and raised its guidance. The company earned $4.8 million, or 5 cents a share, on revenue of $55.7 million. Analysts had forecast earnings of 4 cents a share and revenue of $54.3 million. During the year-earlier quarter, Skillsoft earned $22.9 million, or 22 cents a share, on revenue of $53.6 million. Results during the year-earlier period included an insurance benefit of $19.5 million and noncash charges of $5.7 million.

Skillsoft now sees full-year earnings of $18 million to $21 million, or 17 cents to 20 cents a share. The company's previous forecast called for earnings of $16 million to $20 million, or 16 cents to 20 cents a share. The company now predicts revenue of $218 million to $222 million, up from an earlier view of $213.7 million to $218 million. Analysts project full-year earnings of 20 cents a share, with revenue of $219 million. Skillsoft shares were up 14 cents to $6.03.

Shares of

XM Satellite Radio

(XMSR)

rose 9% after the company said the

Federal Communications Commission

cleared retail sales for three XM radio and FM transmitters. The radios -- Audiovox Xpress, Delphi RoadyXT and XM Sportscaster -- are three of XM's primary products at retail, the company said. As a result of the FCC decision, XM is telling manufacturers to resume production of the radios, which are expected to be available for the holiday season. Shares were trading up $1.19 to $14.09.

Alliance Semiconductor

(ALSC)

fell modestly after the company announced a Dutch Auction tender offer to buy back some 10.9 million shares of stock. The company plans to spend up to $30 million to buy the shares at prices ranging from $2.75 to $3 a share. The buyback would represent almost 31% of Alliance's outstanding stock if all the shares are tendered. The offer expires at midnight on Sept. 22. Shares recently traded down 1 cent to $2.99.

Other technology movers Friday included

Intel

(INTC) - Get Report

, up 3 cents to $18.59;

Sun Microsystems

(SUNW) - Get Report

, down 4 cents to $4.88;

Microsoft

(MSFT) - Get Report

, up 20 cents to $25.94;

Sirius Satellite Radio

(SIRI) - Get Report

, up 7 cents to $4.13;

JDSU

(JDSU)

, up 4 cents to $2.63;

Cisco Systems

(CSCO) - Get Report

, down 1 cent to $21.07;

Applied Materials

(AMAT) - Get Report

, up 18 cents to $16.28;

Oracle

(ORCL) - Get Report

, up 11 cents to $15.49;

Apple Computer

(AAPL) - Get Report

, up 38 cents to $68.19; and

Lucent Technologies

(LU)

, unchanged at $2.21.