| |
Records |
Links  |
|
Author |
Garstang, R.H. |
|
| |
Title |
Light Pollution at Mount Wilson: The Effects of Population Growth and Air Pollution |
Type |
Journal Article |
| |
Year |
2000 |
Publication |
Memorie della Società Astronomia Italiana |
Abbreviated Journal |
|
|
| |
Volume |
71 |
Issue |
1 |
Pages |
|
|
| |
Keywords |
Skyglow |
|
| |
Abstract |
This is the first part of a study of the historical growth of light pollution at Mount Wilson Observatory. The night sky brightness at Mount Wilson due to light pollution from Los Angeles basin was calculated for the years 1910 to 1990, neglecting changes in lighting technology, and without any air pollution ('smog'). The very large effect of population growth is shown. We made a simple extension of our night sky brightness program to include a layer of smog. Two possibilities of constant density and finite thickness. The ground level density is determined by the visibility. We assume a smog layer whose density increases from zero in 1920 to appropriate values for the years from 1950. We added this layer to out model and repeated the Mount Wilson calculations. An average smog layer reduces the visual brightness at the present time by about 6 percent. |
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
IDA @ intern @ |
Serial |
2544 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Dunster, G.P.; de la Iglesia, L.; Ben-Hamo, M.; Nave, C.; Fleischer, J.G.; Panda, S.; de la Iglesia, H.O. |
|
| |
Title |
Sleepmore in Seattle: Later school start times are associated with more sleep and better performance in high school students |
Type |
Journal Article |
| |
Year |
2018 |
Publication |
Science Advances |
Abbreviated Journal |
Sci. Adv. |
|
| |
Volume |
4 |
Issue |
12 |
Pages |
eaau6200 |
|
| |
Keywords |
Human Health |
|
| |
Abstract |
Most teenagers are chronically sleep deprived. One strategy proposed to lengthen adolescent sleep is to delay secondary school start times. This would allow students to wake up later without shifting their bedtime, which is biologically determined by the circadian clock, resulting in a net increase in sleep. So far, there is no objective quantitative data showing that a single intervention such as delaying the school start time significantly increases daily sleep. The Seattle School District delayed the secondary school start time by nearly an hour. We carried out a pre-/post-research study and show that there was an increase in the daily median sleep duration of 34 min, associated with a 4.5% increase in the median grades of the students and an improvement in attendance. |
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
2375-2548 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
GFZ @ kyba @ |
Serial |
2131 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Sedgwick, W.T.; Schneider JR., F. |
|
| |
Title |
The Relation Of Illuminating Gas To Public Health |
Type |
Journal Article |
| |
Year |
1911 |
Publication |
Journal of the American Public Health Association |
Abbreviated Journal |
J Am Public Health Assoc |
|
| |
Volume |
1 |
Issue |
5 |
Pages |
385-390 |
|
| |
Keywords |
Human Health; History |
|
| |
Abstract |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
0273-1975 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
GFZ @ kyba @ |
Serial |
2422 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Maxwell, M. R., Henry, A., Elvidge, C. D., Safran, J., Hobson, V. R., Nelson, I., Tuttle, B. T., Dietz, J. B., & Hunter, J. R. |
|
| |
Title |
Fishery dynamics of the California market squid (Loligo opalescens), as measured by satellite remote sensing |
Type |
Journal Article |
| |
Year |
2004 |
Publication |
Fishery Bulletin |
Abbreviated Journal |
|
|
| |
Volume |
102 |
Issue |
4 |
Pages |
661-670 |
|
| |
Keywords |
Remote Sensing |
|
| |
Abstract |
Novel data on the spatial and temporal distribution of fishing effort and population abundance are presented for the market squid fishery (Loligo opalescens) in the Southern California Bight, 1992−2000. Fishing effort was measured by the detection of boat lights by the Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS). Visual confirmation of fishing vessels by nocturnal aerial surveys indicated that lights detected by satellites are reliable indicators of fishing effort. Overall, fishing activity was concentrated off the following Channel Islands: Santa Rosa, Santa Cruz, Anacapa, and Santa Catalina. Fishing activity occurred at depths of 100 m or less. Landings, effort, and squid abundance (measured as landings per unit of effort, LPUE) markedly declined during the 1997−98 El Niño; landings and LPUE increased afterwards. Within a fishing season, the location of fishing activity shifted from the northern shores of Santa Rosa and Santa Cruz Islands in October, the typical starting date for squid fishing in the Bight, to the southern shores by March, the typical end of the squid season. Light detection by satellites offers a source of fine-scale spatial and temporal data on fishing effort for the market squid fishery off California, and these data can be integrated with environmental data and fishing logbook data in the development of a management plan. |
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
IDA @ intern @ |
Serial |
2471 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Garstang, R. H. |
|
| |
Title |
Light Pollution at Mount Wilson and at Palomar in 1931-32 |
Type |
Journal Article |
| |
Year |
2002 |
Publication |
The Observatory |
Abbreviated Journal |
|
|
| |
Volume |
122 |
Issue |
|
Pages |
|
|
| |
Keywords |
Skyglow |
|
| |
Abstract |
I present a short summary of an unpublished letter by Joel Stebbins on light pollution at Mount Wilson Observatory and on Palmar Mountain in 1931-32. I analyzed his results and show that the light emission per capita in 1932 – o was about 3*1*10^17 photons s^-1 in the blue region, equivalent to about 220 lumens per head in the visual region. These my be compared with about 1*4*10^18 photons s^-1 in the blue region and about 1000 lumens per head in the visual region for California cities in 1970. |
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
no |
|
| |
Call Number |
IDA @ intern @ |
Serial |
2622 |
|
| Permanent link to this record |
