4 Education Lenses
- 1915
- Part Number Title:Occup. Safety and Health Standards for Shipyard Employment
- 1915 Subpart I
- Subpart Title:Personal Protective Equipment
- Title:
- GPO Source:
Target 4.2 By 2030, ensure that all girls and boys have access to quality early childhood development, care and pre-primary education so that they are ready for primary education. The provision of at least one year of free and compulsory quality pre-primary education is encouraged, to be delivered by well-trained educators, as well as that of.
- 2-4-2 Discussion Thinking About Two Lenses. 71% (24) Pages: 1 year: 2019/2020. Qualitative Studies in Special Education. None Pages: 13 year: 2020/2021.
- The Lens at a glance p.12 2.1 The Lens’ comparative advantage 2.2 A flexible and adaptable tool 3. How to use the Lens p.14 3.1 A general framework of analysis, five thematic areas 3.2 The method, step by step 4.
- Viewing through the lens of natural sciences you can use logistics, and technology to view wellness. The historical lense may help you to understand the trends of wellness as well as the historical impact. Lastly, the humanities lenses allow you to understand the effects of wellness on cultures around the world.
1915.153(a)(3) The employer shall ensure that each affected employee uses equipment with filter lenses that have a shade number that provides appropriate protection from injurious light radiation. Table I-1 is a listing of appropriate shade numbers for various operations. If filter lenses are used in goggles worn under a helmet which has a lens, the shade number of the lens in the helmet may be reduced so that the shade numbers of the two lenses will equal the value as shown in Table I-1, §1915.153.
Table I-1-Filter Lenses for Protection Against Radiant Energy
4 Education Lenses
| Operations | Electrode size 1/32 in. | Arc current | Minimum* protective shade |
|---|---|---|---|
| Shielded metal arc welding | Less than 3 | Less than 60 | 7 |
| 3-5 | 60-160 | 8 | |
| 5-8 | 160-250 | 10 | |
| More than 8 | 250-550 | 11 | |
| Gas metal arc welding and flux cored arc welding | Less than 60 | 7 | |
| 60-160 | 10 | ||
| 160-250 | 10 | ||
| 250-500 | 10 | ||
| Gas Tungsten arc welding | Less than 50 | 8 | |
| 50-150 | 8 | ||
| 150-500 | 10 | ||
| Air carbon | (Light) | Less than 500 | 10 |
| Arc cutting | (Heavy) | 500-1000 | 11 |
| Plasma arc welding | Less than 20 | 6 | |
| 20-100 | 8 | ||
| 100-400 | 10 | ||
| 400-800 | 11 | ||
| Plasma arc cutting | (light)** | Less than 300 | 8 |
| (medium)** | 300-400 | 9 | |
| (heavy)** | 400-800 | 10 | |
| Torch brazing | 3 | ||
| Torch soldering | 2 | ||
| Carbon Arc welding | 14 |
** These values apply where the actual arc is clearly seen. Lighter filters may be used when the arc is hidden by the workpiece.
Filter Lenses for Protection Against Radiant Energy
4 Educational Lenses
| Operations | Plate thickness-inches | Plate thickness-mm | Minimum* protective shade |
|---|---|---|---|
| Gas welding: | |||
| Light | Under 1/8 | Under 3.2 | 4 |
| Medium | 1/8 to 1/2 | 3.2 to 12.7 | 5 |
| Heavy | Over 1/2 | Over 12.7 | 6 |
| Oxygen cutting | |||
| Light | Under 1 | Under 25 | 3 |
| Medium | 1 to 6 | 25 to 150 | 4 |
| Heavy | Over 6 | Over 150 | 5 |
* As a rule of thumb, start with a shade that is too dark to see the weld zone. Then go to a lighter shade which gives sufficient view of the weld zone without going below the minimum. In oxyfuel gas welding or cutting where the torch produces a high yellow light, it is desirable to use a filter lens that absorbs the yellow or sodium line in the visible light of the (spectrum) operation.
1915.153(b)(1)4 Educational Lenses
[61 FR 26321, May 24, 1996; 74 FR 46358, Sept. 9, 2009; 81 FR 16091, March 25, 2016; 85 FR 8732-8733, February 18, 2020]
The Four General Education Lenses
Each time we approach a question or project, we are informed by certain perspectives, or “lenses.” At any given time, we are looking through multiple lenses, but often, one may be more dominant than the others. Throughout your academic journey, these lenses coincide with disciplines or fields of study. Here at SNHU, we’ve prioritized four of these lenses: the Humanities, History, the Sciences, and the Social Sciences. Professionals in these fields all ask questions in order to gain information, but they may ask them in different ways that will help them examine different aspects of a topic. We can think of these as four different telescopes, and each lens has different characteristics.
Thus, depending on the lens we are looking through, the cultural artifacts we encounter—the constructed items that convey the benchmarks of a particular culture or social group—will tell a different story. The Humanities At the core of the humanities is human creativity, and they explore the things that humanity creates and how they offer insight into the way people experienced their present, interacted with their culture, and comprehended abstract concepts and big questions about humanity’s place in the universe. The humanities broaden perspectives and promote an understanding of multiple experiences, cultures, and values through various mediums of creative human expression—such as literature, fine art, dance, photography, philosophy and religion, film and television, music, even the internet and social media— many of which are taught as separate academic disciplines…
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4 Lenses Of Education
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