scholarly journals Explorations In Collections Care: Martin And Osa Johnson Glass Negatives In The Permanent Collection At The George Eastman House

2021 ◽  
Author(s):  
Jennifer E. Ko
Keyword(s):  
Glass Plate ◽  
Culturally Sensitive ◽  
Practical Project ◽  
Provenance Research ◽  
Collections Care ◽  
Trajectory Of Care ◽  
Potential Use

This paper discusses a professional practical project that dealt with the collections care undertaken for one instance of found-in-collections material. Consisting of 336 four-by-five and five-by-seven gelatin glass plate negatives by American travel and wildlife filmmakers Martin and Osa Johnson, the material had been cared for in the vaults of the permanent collection at the George Eastman House International Museum of Photography and Film for many years without the establishment of official acquisition or public accessibility. The project discussed in this paper involved the trajectory of care required to make the Johnson material available, including provenance research, official acquisition, registration documentation, cataloguing, and housing improvements. The paper discusses this process, analyzing decisions made from issues of arrangement to culturally-sensitive description in associated cataloguing records. Finally, this paper suggests avenues for potential use of the Johnson material, arguing for the possibilities afforded by accessibility.

Explorations In Collections Care: Martin And Osa Johnson Glass Negatives In The Permanent Collection At The George Eastman House

2021 ◽  
Author(s):  
Jennifer E. Ko
Keyword(s):  
Glass Plate ◽  
Culturally Sensitive ◽  
Practical Project ◽  
Provenance Research ◽  
Collections Care ◽  
Trajectory Of Care ◽  
Potential Use

This paper discusses a professional practical project that dealt with the collections care undertaken for one instance of found-in-collections material. Consisting of 336 four-by-five and five-by-seven gelatin glass plate negatives by American travel and wildlife filmmakers Martin and Osa Johnson, the material had been cared for in the vaults of the permanent collection at the George Eastman House International Museum of Photography and Film for many years without the establishment of official acquisition or public accessibility. The project discussed in this paper involved the trajectory of care required to make the Johnson material available, including provenance research, official acquisition, registration documentation, cataloguing, and housing improvements. The paper discusses this process, analyzing decisions made from issues of arrangement to culturally-sensitive description in associated cataloguing records. Finally, this paper suggests avenues for potential use of the Johnson material, arguing for the possibilities afforded by accessibility.

scholarly journals The use of solar energy for the curing of ferrogeopolymer elements in the semiarid region

2019 ◽  
Vol 276 ◽  
pp. 01031 ◽  
Author(s):  
Partogi H Simatupang ◽  
Petrus Lubalu ◽  
Herry L Sianturi ◽  
Wilhelmus Bunganaen
Keyword(s):  
Solar Energy ◽  
Low Cost ◽  
Glass Plate ◽  
Energy Resource ◽  
Semiarid Region ◽  
Collector System ◽  
Good Potential ◽  
Dry Seasons ◽  
Wire Meshes ◽  
Potential Use

Kupang City in Timor Island of Indonesia, as a semiarid area, has abundant solar energy sources. Based on climatology data of Kupang City in 2013-2015, the minimum and maximum average temperatures in Kupang City range from 19.3-34.8oC. Besides, dry seasons last for about 8 months (April-November). This abundance of solar energy is a potential energy resource for the manufacturing of environmentally friendly ferrogeopolymer elements. Based on previous research, the production of geopolymer material can be done optimally with dry curing treatment at 60-80oC for less than 48 hours. Therefore, in this paper, a low-cost, energy efficient oven operated by a solar energy collector was developed. This paper describes a feasibility study of the use of solar energy for curing ferro-geopolymer elements. The ferro-geopolymer elements made were beams with length 600 mm, width 100 mm and height 100 mm. Wire meshes with 6x6mm of opening were used in 5 layers. The solar energy collector system used as an oven was a zinc coated drum which was painted black outwardly and was covered by a glass plate. Using this oven, it was possible to increase the ambient temperature by 1.62 to 2,37 times. Furthermore, this oven can also increase the flexure strength of ferrogeopolymer elements about ± 25.34%. This paper shows good potential use of solar energy in the manufacturing of ferro-geopolymer elements in the semiarid region.

The growth of mica polytypes as studied by conventional and high-resolution TEM

1983 ◽  
Vol 41 ◽  
pp. 174-177
Author(s):  
A. Baronnet ◽  
M. Amouric
Keyword(s):  
Water Pressure ◽  
Point Of View ◽  
Temperature Fields ◽  
Natural Occurrence ◽  
Growth Mechanisms ◽  
Long Period ◽  
High Resolution Tem ◽  
Layer Stacking ◽  
Experimental Works ◽  
Potential Use

The origin of mica polytypes has long been a challenging problem for crystal- lographers, mineralogists and petrologists. From the petrological point of view, interest in this field arose from the potential use of layer stacking data to furnish further informations about equilibrium and/or kinetic conditions prevailing during the crystallization of the widespread mica-bearing rocks. From the compilation of previous experimental works dealing with the occurrence domains of the various mica "polymorphs" (1Mr, 1M, 2M1, 2M2 and 3T) within water-pressure vs temperature fields, it became clear that most of these modifications should be considered as metastable for a fixed mica species. Furthermore, the natural occurrence of long-period (or complex) polytypes could not be accounted for by phase considerations. This highlighted the need of a more detailed kinetic approach of the problem and, in particular, of the role growth mechanisms of basal faces could play in this crystallographic phenomenon.

Effects of compression during formation on the microstructure of composite hydroxylapatite/plaster implants for bone reconstruction

1988 ◽  
Vol 46 ◽  
pp. 750-751
Author(s):  
J. Hanker ◽  
K. Cowden ◽  
R. Noecker ◽  
P. Yates ◽  
N. Georgiade ◽  
...  
Keyword(s):  
Cosmetic Surgery ◽  
Glass Plate ◽  
Surgical Reconstruction ◽  
Equal Weight ◽  
Sintered Ceramic ◽  
Setting Times ◽  
Excess Water ◽  
Mixture Prior ◽  
Mechanical Strengths ◽  
Calcium Sulfate Hemihydrate

Composites of plaster of Paris (PP) and hydroxylapatite (HA) particles are being applied for the surgical reconstruction of craniofacial bone defects and for cosmetic surgery. Two types of HA particles are being employed, the dense sintered ceramic (DHA) and the porous, coralline hydroxylapatite (PHA) particles. Excess water is expressed out of the moistened HA/PP mixture prior to implantation and setting by pressing it in a non-tapered syringe against a glass plate. This results in implants with faster setting times and greater mechanical strengths. It was therefore of interest to compare samples of the compressed versus noncompressed mixtures to see whether or not any changes in their microstructure after setting could be related to these different properties.USG Medical Grade Calcium Sulfate Hemihydrate (which has the lowest mortar consistency of any known plaster) was mixed with an equal weight of Interpore 200 particles (a commercial form of PHA). After moistening with a minimum amount of water, disc-shaped noncompressed samples were made by filling small holes (0.339 in. diameter x 0.053 in. deep) in polypropylene molds with a microspatula.

An atomic-resolution microscope study of Al contracts on GaAs

1986 ◽  
Vol 44 ◽  
pp. 726-727
Author(s):  
Z. Liliental-Weber ◽  
C. Nelson ◽  
R. Ludeke ◽  
R. Gronsky ◽  
J. Washburn
Keyword(s):  
High Speed ◽  
Schottky Contacts ◽  
Detailed Knowledge ◽  
The Past ◽  
Semiconductor Interfaces ◽  
Deposited Metal ◽  
Microwave Applications ◽  
Free Interfaces ◽  
Potential Use

The properties of metal/semiconductor interfaces have received considerable attention over the past few years, and the Al/GaAs system is of special interest because of its potential use in high-speed logic integrated optics, and microwave applications. For such materials a detailed knowledge of the geometric and electronic structure of the interface is fundamental to an understanding of the electrical properties of the contact. It is well known that the properties of Schottky contacts are established within a few atomic layers of the deposited metal. Therefore surface contamination can play a significant role. A method for fabricating contamination-free interfaces is absolutely necessary for reproducible properties, and molecularbeam epitaxy (MBE) offers such advantages for in-situ metal deposition under UHV conditions

Fostering the Literacy of indigenous Elementary School-Age Children

2008 ◽  
Vol 15 (1) ◽  
pp. 5-11 ◽  
Author(s):  
Diane Frome Loeb ◽  
Kathy Redbird
Keyword(s):  
Native American ◽  
Indigenous People ◽  
Culturally Sensitive ◽  
Literacy Skills ◽  
School Age Children ◽  
School Age ◽  
Reading Curriculum ◽  
Authentic Materials ◽  
Elementary School Age ◽  
Values And Beliefs

Abstract Purpose: In this article, we describe the existing literacy research with school-age children who are indigenous. The lack of data for this group of children requires speech-language pathologists (SLPs) to use expert opinion from indigenous and non-indigenous people to develop culturally sensitive methods for fostering literacy skills. Method: We describe two available curricula developed by indigenous people that are available, which use authentic materials and embed indigenous stories into the learning environment: The Indian Reading Series and the Northwest Native American Reading Curriculum. We also discuss the importance of using cooperative learning, multisensory instruction, and increased holistic emphasis to create a more culturally sensitive implementation of services. We provide an example of a literacy-based language facilitation that was developed for an indigenous tribe in Kansas. Conclusion: SLPs can provide services to indigenous children that foster literacy skills through storytelling using authentic materials as well as activities and methods that are consistent with the client's values and beliefs.

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