We propose a game-theoretic model for a first-price sealed-bid auction （FPSB auction） of standing timber. A FPSB auction means that bidders simultaneously submit sealed bids so that no bidder knows the bid of any ot...We propose a game-theoretic model for a first-price sealed-bid auction （FPSB auction） of standing timber. A FPSB auction means that bidders simultaneously submit sealed bids so that no bidder knows the bid of any other participant. The highest bidder pays the submitted price. The mathematical model has been elaborated considering only two bidders. Each bidder is supposed to know only the probability distribution of the bid of the other bidder. Using ap- propriate distributions, the adversity and propensity of a bidder to risk can be described. From the view point of a bidder, the conservative solution is calculated for both types of the other bidder. If a standing timber belongs to a public owner, the market has to follow a public evidence procedure, including public auctions. The function obtained is illustrated with a numerical example of a typical standing timber auction from a forest located in central Italy. Considering average costs and prices of the local chestnut timber market, winning bids and expected gains are estimated. Their amounts are com- parable with the currently average stumpage price registered in this market.展开更多
Background: To evaluate aetiology of acute scrotum after surgical exploration suspicious for spermatic cord torsion, to compare surgical with clinical findings and to support the clinician distinguishing spermatic cor...Background: To evaluate aetiology of acute scrotum after surgical exploration suspicious for spermatic cord torsion, to compare surgical with clinical findings and to support the clinician distinguishing spermatic cord torsion from other diseases mimicking this emergency requiring surgical exploration. Methods: All men with the diagnosis of an acute scrotum who underwent emergency scrotal exploration between January 1995 and October 2009 were retrospectively evaluated. Results: 230 patients were analyzed. Torsion of the spermatic cord (53%) was the most common cause followed by torsion of the testis appendages (25%). Patients with spermatic cord torsion were significantly older (15.5 y) and haunted hospital faster than others (p Conclusions: Our data demonstrate that spermatic cord torsion is more common in adolescent. Short pain duration and high intrascrotal position of the testicle are associated with higher probability of spermatic cord torsion. Duplex sonography plays an important role in the diagnostic workup but history and physical examination are the crucial parameters. In nebulous clinical cases emergency surgical exploration has to be recommended.展开更多
文摘We propose a game-theoretic model for a first-price sealed-bid auction （FPSB auction） of standing timber. A FPSB auction means that bidders simultaneously submit sealed bids so that no bidder knows the bid of any other participant. The highest bidder pays the submitted price. The mathematical model has been elaborated considering only two bidders. Each bidder is supposed to know only the probability distribution of the bid of the other bidder. Using ap- propriate distributions, the adversity and propensity of a bidder to risk can be described. From the view point of a bidder, the conservative solution is calculated for both types of the other bidder. If a standing timber belongs to a public owner, the market has to follow a public evidence procedure, including public auctions. The function obtained is illustrated with a numerical example of a typical standing timber auction from a forest located in central Italy. Considering average costs and prices of the local chestnut timber market, winning bids and expected gains are estimated. Their amounts are com- parable with the currently average stumpage price registered in this market.
文摘Background: To evaluate aetiology of acute scrotum after surgical exploration suspicious for spermatic cord torsion, to compare surgical with clinical findings and to support the clinician distinguishing spermatic cord torsion from other diseases mimicking this emergency requiring surgical exploration. Methods: All men with the diagnosis of an acute scrotum who underwent emergency scrotal exploration between January 1995 and October 2009 were retrospectively evaluated. Results: 230 patients were analyzed. Torsion of the spermatic cord (53%) was the most common cause followed by torsion of the testis appendages (25%). Patients with spermatic cord torsion were significantly older (15.5 y) and haunted hospital faster than others (p Conclusions: Our data demonstrate that spermatic cord torsion is more common in adolescent. Short pain duration and high intrascrotal position of the testicle are associated with higher probability of spermatic cord torsion. Duplex sonography plays an important role in the diagnostic workup but history and physical examination are the crucial parameters. In nebulous clinical cases emergency surgical exploration has to be recommended.
