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my 8 inch f/6 mirror making

The measured focal length is 118.5 mm, ie f/5.84

75 years of battling diabetes

Today(2015), with over 29 million Americans with diabetes and nearly 400 million similar individuals worldwide, the enormity of the diabetes problem has escalated exponentially CHF: congestive heart failure ER: emergency room ESRD: end-stage renal disease IHD: ischemic heart disease. Diabetes is a major cause of morbidity and mortality in Hong Kong. It claimed about 13700 in-patient discharges and in-patient deaths in all hospitals†, and 492 registered deaths‡ in 2015. It was the tenth commonest cause of deaths in Hong Kong, accounting for 1.1% of all deaths in 2015. The crude death rates were 7.2 for male and 6.4 for female per 100000 population of respective sex in 2015. The true number of deaths from diabetes is possibly higher since many deaths can be attributed to its late complications. Age-standardised death rates were 3.8 for male and 2.6 for female per 100000 standard population in 2015. From early 1980's to 2000, the age standardised mortality rate showe...

TESS camera

Mission:  The Transiting Exoplanet Survey Satellite (TESS) is an full sky mapping Explorer-class mission, dedicated to finding planets around bright, nearby stars so that more detailed follow-up studies can be done.   specification The detector assembly in each camera consists of a focal plane CCD array and associated electronics. Each CCD array contains four back-illuminated MIT/Lincoln Laboratory CCID-80 devices. The 100um deep-depletion, frame-transfer CCDs consist of a 2048 x 2048 imaging array and a 2048 x 2048 frame-store region (for rapid shutter-less readout 4 ms) with 15 x 15 micron pixels. The four CCDs in each array are separated by 2mm and create an effective 4096 x 4096 pixel detector that is operated at -75 degrees C to reduce dark current. The detectors are read out at 625 kHz with <10 e- read noise. The detector electronics consist of two compact double-sided printed circuit boards seated beneath the CCD focal plan...

xiaomi band battery

Mi band one ( First gen ) plastic package removed, and uncoiled: so it is a lithium polymer type battery. 3.8V 0.17 Wh 0.17 / 3.8 = 45 mAh capacity Mi Band 2 ( 2nd gen ) again a lithium polymer battery 3.7V, 0.17Wh, 45 mAh capacity So despite a newer generation, the battery remains same. The major difference is the on UI. Generation One use 4 dot size LED Generationt Two use dot matrix OLED

Gene roasting profile

From BoldJava: ^ Preheat unit with hopper in to 175C. ^ Pre-measure 230grams ^ Hit E stop and move like the wind ^ Use dual settings. a. High grown or dense beans: 248C into the first crack plus 45 seconds. Then turn down to 243C until 2:30 minutes past initial crack of first crack (try to stay out of 2nd crack). I call this a full city roast and is my starting point for working on a new bean. I can shorten/lengthen based on cupping results. Most beans finish between 12:45 and 14:00 minutes. b. Brazilians, some Indonesians, intermediate elevation beans: 243C/237C, profiled above c. Kona and Caribbean beans: 237C/232C , profiled above I end the roasts with an E stop and cool my beans externally. My current is a steady 120 (variac controlled). My assumption is that you have 220V so trust that the profiles can be superimposed onto your unit. From John Despres: The harder, more dense beans that are typically grown over 5000 feet need a higher initial heat and less ...

fine grinding, 1/3 D W stroke

For fine grinding starting from 220 grit and finer, the normal 1/3D stroke used is shown in Fig 8. the mirror is centered over the tool and the stroke is a W-type stroke with a total lateral amplitude of ¼D (i.e. 1.8 cm on either side of the centre for a 15 cm mirror) and an up and down amplitude of about 1/3D (i.e. about 2.5 cm up, 2.5 cm down for a 15 cm mirror). It should be 1/3D on the average; some strokes should be a little shorter and some a little longer. No attempt should be made to make the strokes uniformly 1/3D in amplitude. The 120 0 rotations of the blank above and the 45 0 rotations of the blank below are of course continued. the wet now lasts longer, say for 4 or 5 minutes. At the completion of a wet the mirror and tool are cleaned as before and a fresh charge used. Shankar

Request for illumination prohibition by upward search light on highway

Regarding the maintenance of expressways, sign lighting by nightly searchlight is a concern for light hazards and traffic safety. I would like to ask for appropriate guidance to related areas, thank you. Astronomical observation, science education: Astronomical observation requires a dark night sky. Japan boasts one of the world's leading campaigns and achievements in citizen (amateur) astronomical activities, and specialized astronomers at universities, research institutes and science educational facilities throughout the country are conducting advanced research to capture weak light from space I am doing big scientific achievements. At elementary and secondary schools, observation of stars and astronomical observations are conducted as part of science education. Measures against light pollution by the Ministry of the Environment: "Light pollution countermeasure guideline" (1998) formulated by the Ministry of the Environment and "Han...