A 29-year-old man complaining of gross hematuria was referred to our department. DIP demonstrated calyceal diverticular calculi of the left kidney. The patient requested ESWL, but the stone had not been discharged after two treatments. He then underwent PNL with dilation of the narrow neck of the calyceal diverticulum under fluoroscope. The neck of the diverticulum was dilated using an amplats dilator. Three months after the surgery, DIP demonstrated that the diverticulum was completely free from calculi and the size of the diverticulum was reduced. He was doing well 24 months after the operation. Calyceal diverticular calculi should be managed not only with ESWL and PNL but also with dilation of the narrow neck of the calyceal diverticulum.

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This study is pcr 「 brnied to examine experjmelllal the burning veloeity characteristics of the methane − premixcd micro − scale spherical lamina じ fiames with the flamc radius ， 7 ＜ approximatcly 5mln， and also macro − scale laminar flames with ウ ＞ 5mln fbr comparison ． Thc mTxtures havc ncarly thc same laminar burnlng velocity and d " 行 ferent cquivalenco ratio φ( 0， 8 -1， 0) ． Thc radius and tlle buming veloclty of micro − scate flames are obtained by using sequential schlieren images recorded under aPpropriate ignltion conditions ． Tlle rcsu 且 ts show that the burning velocity of methane − premixed micro −scalc tlamcs has tcndcncy to increase with incrcasing f andapProach tllat oflnacro − sca1 し flames． Key 隣 丿 厂4y ：Micro −scalc 1 」 lame ， Methan ¢ Bunling Velocity ， Flame Size， Flame Stretoh

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