scholarly journals Undergraduate optical design courses at the Rose-Hulman Institute of Technology

2003 ◽  
Author(s):  
Zoran Milanovic ◽  
Robert M. Bunch ◽  
Galen C. Duree
Keyword(s):  
Optical Design ◽  
Institute Of Technology ◽  
The Rose

scholarly journals Raman Lidar for Meteorological Observations, RALMO – Part 1: Instrument description

2013 ◽  
Vol 6 (5) ◽  
pp. 1329-1346 ◽  
Author(s):  
T. Dinoev ◽  
V. Simeonov ◽  
Y. Arshinov ◽  
S. Bobrovnikov ◽  
P. Ristori ◽  
...  
Keyword(s):  
Water Vapor ◽  
Optical Design ◽  
Lidar Measurement ◽  
Raman Lidar ◽  
Measurement Capability ◽  
Vertical Range ◽  
Federal Institute ◽  
Technical Realization ◽  
Meteorological Observations ◽  
Institute Of Technology

Abstract. A new Raman lidar for unattended, round-the-clock measurement of vertical water vapor profiles for operational use by the MeteoSwiss has been developed during the past years by the Swiss Federal Institute of Technology, Lausanne. The lidar uses narrow field-of-view, narrowband configuration, a UV laser, and four 30 cm in diameter mirrors, fiber-coupled to a grating polychromator. The optical design allows water vapor retrieval from the incomplete overlap region without instrument-specific range-dependent corrections. The daytime vertical range covers the mid-troposphere, whereas the nighttime range extends to the tropopause. The near range coverage is extended down to 100 m AGL by the use of an additional fiber in one of the telescopes. This paper describes the system layout and technical realization. Day- and nighttime lidar profiles compared to Vaisala RS92 and Snow White® profiles and a six-day continuous observation are presented as an illustration of the lidar measurement capability.

scholarly journals Raman Lidar for Meteorological Observations, RALMO – Part I: Instrument description

2012 ◽  
Vol 5 (5) ◽  
pp. 6867-6914 ◽  
Author(s):  
T. S. Dinoev ◽  
V. B. Simeonov ◽  
Y. F. Arshinov ◽  
S. M. Bobrovnikov ◽  
P. Ristori ◽  
...  
Keyword(s):  
Water Vapor ◽  
Optical Design ◽  
Time Range ◽  
Lidar Measurement ◽  
Raman Lidar ◽  
Night Time ◽  
Measurement Capability ◽  
Vertical Range ◽  
Federal Institute ◽  
Institute Of Technology

Abstract. A new Raman lidar for unattended, round the clock measurement of vertical water vapor profiles for operational use by the MeteoSwiss has been developed during the past years by the Swiss Federal Institute of Technology- Lausanne. The lidar uses narrow-field-of-view, narrow-band configuration, a UV laser, and four 30 cm in diameter mirrors, fiber-coupled to a grating polychromator. The optical design allows water vapor retrieval from the incomplete overlap region without instrument-specific range-dependent corrections. The daytime vertical range covers the mid-troposphere, whereas the night-time range extends to the tropopause. The near range coverage is extended down to 100 m AGL by the use of an additional fiber in one of the telescopes. This paper describes the system layout and technical realization. Day and night time lidar profiles compared to Vaisala RS-92 and Snow White® profiles and a six-day-continuous observation are presented as an illustration of the lidar measurement capability.

Seismicity of San Diego, 1934-1974

1977 ◽  
Vol 67 (3) ◽  
pp. 809-826
Author(s):  
Richard S. Simons
Keyword(s):  
San Diego ◽  
Great Majority ◽  
Velocity Model ◽  
California Institute Of Technology ◽  
Crustal Velocity ◽  
San Diego Bay ◽  
Crustal Velocity Model ◽  
Institute Of Technology ◽  
The City ◽  
The Rose

abstract Twelve quarry explosions in the city of San Diego have been used to determine the following crustal velocity model for the region around it: h 1 = 1.5 k m α 1 = 3.50 k m / sec β 1 = 1.90 k m / sec ⁡ h 2 = 26.5 k m α 2 = 6.35 k m / sec ⁡ β 2 = 3.65 k m / sec h 3 = ∞ α 3 = 8.00 k m / sec β 3 = 4.60 k m / sec A computer program employing this model has been used to recalculate the epicenters of all events previously located in the San Diego area, utilizing data from the California Institute of Technology seismic network as well as recent new stations within the city. Tests on the accuracy of the location process indicate that over 50 per cent of the solutions can be expected to be within 2 km of the true epicenters and that 90 per cent will be within 4 km. A total of 37 earthquakes can now be identified with some confidence as having occurred within the study area (32.5°-33.0°N, 116.75°-117.5°W) from 1934 through 1974. Some events previously thought to be earthquakes are now found to have been quarry blasts. The great majority of the earthquakes lie either offshore or less than 10 km inland, in regions of known faulting paralleling the Coronado Escarpment and the Rose Canyon fault zone. Three earthquakes are located within 2 km of the La Nacion fault. Nine of the 11 events since 1963 have taken place within or around the south end of San Diego Bay. Depths are poorly controlled, but seem to be generally less than 8 km. Magnitudes range from 2.3 to 3.7.

Use of the Magnetostatic Analogue In Electromagnetic Lens Engineering

1970 ◽  
Vol 28 ◽  
pp. 360-361
Author(s):  
John W. Coleman
Keyword(s):  
Boundary Conditions ◽  
High Performance ◽  
Force Fields ◽  
Optical Design ◽  
Direct Conversion ◽  
Design Engineering ◽  
Design Data ◽  
Scalar Potentials ◽  
Geometric Elements ◽  
At Will

In the design engineering of high performance electromagnetic lenses, the direct conversion of electron optical design data into drawings for reliable hardware is oftentimes difficult, especially in terms of how to mount parts to each other, how to tolerance dimensions, and how to specify finishes. An answer to this is in the use of magnetostatic analytics, corresponding to boundary conditions for the optical design. With such models, the magnetostatic force on a test pole along the axis may be examined, and in this way one may obtain priority listings for holding dimensions, relieving stresses, etc..The development of magnetostatic models most easily proceeds from the derivation of scalar potentials of separate geometric elements. These potentials can then be conbined at will because of the superposition characteristic of conservative force fields.

Automated mineral analysis in TASK8

1990 ◽  
Vol 48 (2) ◽  
pp. 212-213
Author(s):  
William F. Chambers ◽  
Arthur A. Chodos ◽  
Roland C. Hagan
Keyword(s):  
National Laboratory ◽  
Control Program ◽  
Mineral Analysis ◽  
Alamos National Laboratory ◽  
Mineral Phase ◽  
Los Alamos National Laboratory ◽  
California Institute Of Technology ◽  
Mineral Phases ◽  
Letter Code ◽  
Institute Of Technology

TASK8 was designed as an electron microprobe control program with maximum flexibility and versatility, lending itself to a wide variety of applications. While using TASKS in the microprobe laboratory of the Los Alamos National Laboratory, we decided to incorporate the capability of using subroutines which perform specific end-member calculations for nearly any type of mineral phase that might be analyzed in the laboratory. This procedure minimizes the need for post-processing of the data to perform such calculations as element ratios or end-member or formula proportions. It also allows real time assessment of each data point.The use of unique “mineral codes” to specify the list of elements to be measured and the type of calculation to perform on the results was first used in the microprobe laboratory at the California Institute of Technology to optimize the analysis of mineral phases. This approach was used to create a series of subroutines in TASK8 which are called by a three letter code.

Applying the Anderson-Darling Test to Suicide Clusters

Crisis ◽  
2013 ◽  
Vol 34 (6) ◽  
pp. 434-437 ◽  
Author(s):  
Donald W. MacKenzie
Keyword(s):  
Poisson Process ◽  
Goodness Of Fit ◽  
Small Samples ◽  
Massachusetts Institute Of Technology ◽  
Homogeneous Poisson Process ◽  
Cornell University ◽  
The Difference ◽  
Suicide Clusters ◽  
Institute Of Technology ◽  
Anderson Darling

Background: Suicide clusters at Cornell University and the Massachusetts Institute of Technology (MIT) prompted popular and expert speculation of suicide contagion. However, some clustering is to be expected in any random process. Aim: This work tested whether suicide clusters at these two universities differed significantly from those expected under a homogeneous Poisson process, in which suicides occur randomly and independently of one another. Method: Suicide dates were collected for MIT and Cornell for 1990–2012. The Anderson-Darling statistic was used to test the goodness-of-fit of the intervals between suicides to distribution expected under the Poisson process. Results: Suicides at MIT were consistent with the homogeneous Poisson process, while those at Cornell showed clustering inconsistent with such a process (p = .05). Conclusions: The Anderson-Darling test provides a statistically powerful means to identify suicide clustering in small samples. Practitioners can use this method to test for clustering in relevant communities. The difference in clustering behavior between the two institutions suggests that more institutions should be studied to determine the prevalence of suicide clustering in universities and its causes.

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