49 CFR 176.168 - Transport of Class 1 (explosive) materials in vehicle spaces.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Transport of Class 1 (explosive) materials in... REGULATIONS CARRIAGE BY VESSEL Detailed Requirements for Class 1 (Explosive) Materials Cargo Transport Units and Shipborne Barges § 176.168 Transport of Class 1 (explosive) materials in vehicle spaces. (a) All...

49 CFR 173.124 - Class 4, Divisions 4.1, 4.2 and 4.3-Definitions.

Code of Federal Regulations, 2010 CFR

2010-10-01

... material must be determined using the testing protocol from Figure 14.2 (Flow Chart for Assigning Self... HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS... Assignments and Exceptions for Hazardous Materials Other Than Class 1 and Class 7 § 173.124 Class 4, Divisions...

49 CFR 173.154 - Exceptions for Class 8 (corrosive materials).

Code of Federal Regulations, 2010 CFR

2010-10-01

... material meets the definition of a hazardous substance, hazardous waste, marine pollutant, or are offered... waste, or a marine pollutant, a material classed as a Class 8, Packing Group III, material solely...

49 CFR 172.316 - Packagings containing materials classed as ORM-D.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Packagings containing materials classed as ORM-D... INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS Marking § 172.316 Packagings containing materials classed as ORM-D. (a) Each non-bulk packaging containing a material classed as ORM-D must be marked on at...

78 FR 69745 - Safety and Security Plans for Class 3 Hazardous Materials Transported by Rail

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-20

... DEPARTMENT OF TRANSPORTATION Pipeline and Hazardous Materials Safety Administration [Docket No... Security Plans for Class 3 Hazardous Materials Transported by Rail AGENCY: Pipeline and Hazardous Materials... characterization, classification, and selection of a packing group for Class 3 materials, and the corresponding...

49 CFR 176.144 - Segregation of Class 1 (explosive) materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Segregation of Class 1 (explosive) materials. 176... VESSEL Detailed Requirements for Class 1 (Explosive) Materials Segregation § 176.144 Segregation of Class... any ferrous metal or aluminum alloy, unless separated by a partition. (e) Segregation on deck: When...

49 CFR 176.144 - Segregation of Class 1 (explosive) materials.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Segregation of Class 1 (explosive) materials. 176... VESSEL Detailed Requirements for Class 1 (Explosive) Materials Segregation § 176.144 Segregation of Class... any ferrous metal or aluminum alloy, unless separated by a partition. (e) Segregation on deck: When...

The Effectiveness of learning materials based on multiple intelligence on the understanding of global warming

NASA Astrophysics Data System (ADS)

Liliawati, W.; Purwanto; Zulfikar, A.; Kamal, R. N.

2018-05-01

This study aims to examine the effectiveness of the use of teaching materials based on multiple intelligences on the understanding of high school students’ material on the theme of global warming. The research method used is static-group pretest-posttest design. Participants of the study were 60 high school students of XI class in one of the high schools in Bandung. Participants were divided into two classes of 30 students each for the experimental class and control class. The experimental class uses compound-based teaching materials while the experimental class does not use a compound intelligence-based teaching material. The instrument used is a test of understanding of the concept of global warming with multiple choices form amounted to 15 questions and 5 essay items. The test is given before and after it is applied to both classes. Data analysis using N-gain and effect size. The results obtained that the N-gain for both classes is in the medium category and the effectiveness of the use of teaching materials based on the results of effect-size test results obtained in the high category.

78 FR 60745 - Hazardous Materials: Minor Editorial Corrections and Clarifications (RRR)

Federal Register 2010, 2011, 2012, 2013, 2014

2013-10-02

... 173.62 This section provides packaging instructions for Class 1 explosive materials. Paragraph (b) of... requirements for approval of special form Class 7 (radioactive) materials. Paragraph (d) of this section notes... activity of special form Class 7 (radioactive) material permitted in a Type A package equals the maximum...

75 FR 17111 - Hazardous Materials Regulations: Combustible Liquids

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-05

... non-bulk packagings in a revised set of requirements for Class 3 materials, thereby eliminating the... material classed as a combustible liquid in a non-bulk packaging unless the combustible liquid is a... package for limited quantities for Class 7 (radioactive materials) could be transported as a combustible...

49 CFR 176.400 - Stowage of Division 1.5, Class 4 (flammable solids) and Class 5 (oxidizers and organic peroxides...

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Stowage of Division 1.5, Class 4 (flammable solids... Solids), Class 5 (Oxidizers and Organic Peroxides), and Division 1.5 Materials § 176.400 Stowage of Division 1.5, Class 4 (flammable solids) and Class 5 (oxidizers and organic peroxides) materials. (a) Class...

49 CFR 174.304 - Class 3 (flammable liquid) materials in tank cars.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 2 2013-10-01 2013-10-01 false Class 3 (flammable liquid) materials in tank cars... (flammable liquid) materials in tank cars. A tank car containing a Class 3 (flammable liquid) material, other... the liquid from the tank car to permanent storage tanks of sufficient capacity to receive the entire...

49 CFR 174.304 - Class 3 (flammable liquid) materials in tank cars.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 2 2014-10-01 2014-10-01 false Class 3 (flammable liquid) materials in tank cars... (flammable liquid) materials in tank cars. A tank car containing a Class 3 (flammable liquid) material, other... the liquid from the tank car to permanent storage tanks of sufficient capacity to receive the entire...

49 CFR 174.304 - Class 3 (flammable liquid) materials in tank cars.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Class 3 (flammable liquid) materials in tank cars... (flammable liquid) materials in tank cars. A tank car containing a Class 3 (flammable liquid) material, other... the liquid from the tank car to permanent storage tanks of sufficient capacity to receive the entire...

49 CFR 174.304 - Class 3 (flammable liquid) materials in tank cars.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Class 3 (flammable liquid) materials in tank cars... (flammable liquid) materials in tank cars. A tank car containing a Class 3 (flammable liquid) material, other... the liquid from the tank car to permanent storage tanks of sufficient capacity to receive the entire...

49 CFR 176.192 - Cargo handling equipment for freight containers carrying Class 1 (explosive) materials.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 2 2014-10-01 2014-10-01 false Cargo handling equipment for freight containers...) Materials Handling Class 1 (explosive) Materials in Port § 176.192 Cargo handling equipment for freight containers carrying Class 1 (explosive) materials. (a) Except in an emergency, only cargo handling equipment...

49 CFR 176.192 - Cargo handling equipment for freight containers carrying Class 1 (explosive) materials.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Cargo handling equipment for freight containers...) Materials Handling Class 1 (explosive) Materials in Port § 176.192 Cargo handling equipment for freight containers carrying Class 1 (explosive) materials. (a) Except in an emergency, only cargo handling equipment...

49 CFR 176.192 - Cargo handling equipment for freight containers carrying Class 1 (explosive) materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Cargo handling equipment for freight containers...) Materials Handling Class 1 (explosive) Materials in Port § 176.192 Cargo handling equipment for freight containers carrying Class 1 (explosive) materials. (a) Except in an emergency, only cargo handling equipment...

49 CFR 176.192 - Cargo handling equipment for freight containers carrying Class 1 (explosive) materials.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 2 2013-10-01 2013-10-01 false Cargo handling equipment for freight containers...) Materials Handling Class 1 (explosive) Materials in Port § 176.192 Cargo handling equipment for freight containers carrying Class 1 (explosive) materials. (a) Except in an emergency, only cargo handling equipment...

49 CFR 176.192 - Cargo handling equipment for freight containers carrying Class 1 (explosive) materials.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 2 2012-10-01 2012-10-01 false Cargo handling equipment for freight containers...) Materials Handling Class 1 (explosive) Materials in Port § 176.192 Cargo handling equipment for freight containers carrying Class 1 (explosive) materials. (a) Except in an emergency, only cargo handling equipment...

Using Storytelling Strategies to Improve Student Comprehension in Online Classes

ERIC Educational Resources Information Center

Powell, Rasby Marlene; Murray, Ottis

2012-01-01

Previous research shows that presenting class material in story formats can improve student learning in lecture classes. This pilot study of eight sociology classes investigates the efficacy of using storytelling as a means to improve student comprehension in online classes. Our findings show that when material is presented in story format rather…

49 CFR 172.402 - Additional labeling requirements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 30, 2001, such as, a label without the hazard class or division number displayed in the lower corner... this section); and (2)For other than Class 1 or Class 2 materials (for subsidiary labeling requirements for Class 1 or Class 2 materials see paragraph (e) or paragraphs (f) and (g), respectively, of this...

49 CFR 176.170 - Transport of Class 1 (explosive) materials in freight containers.

Code of Federal Regulations, 2012 CFR

2012-10-01

... ships, freight containers containing Class 1 (explosive) materials must be stowed only in the lowest... freight containers. 176.170 Section 176.170 Transportation Other Regulations Relating to Transportation... and Shipborne Barges § 176.170 Transport of Class 1 (explosive) materials in freight containers. (a...

49 CFR 176.170 - Transport of Class 1 (explosive) materials in freight containers.

Code of Federal Regulations, 2013 CFR

2013-10-01

... ships, freight containers containing Class 1 (explosive) materials must be stowed only in the lowest... freight containers. 176.170 Section 176.170 Transportation Other Regulations Relating to Transportation... and Shipborne Barges § 176.170 Transport of Class 1 (explosive) materials in freight containers. (a...

49 CFR 176.170 - Transport of Class 1 (explosive) materials in freight containers.

Code of Federal Regulations, 2014 CFR

2014-10-01

... ships, freight containers containing Class 1 (explosive) materials must be stowed only in the lowest... freight containers. 176.170 Section 176.170 Transportation Other Regulations Relating to Transportation... and Shipborne Barges § 176.170 Transport of Class 1 (explosive) materials in freight containers. (a...

Experiential or Material Purchases? Social Class Determines Purchase Happiness.

PubMed

Lee, Jacob C; Hall, Deborah L; Wood, Wendy

2018-05-01

Which should people buy to make themselves happy: experiences or material goods? The answer depends in part on the level of resources already available in their lives. Across multiple studies using a range of methodologies, we found that individuals of higher social class, whose abundant resources make it possible to focus on self-development and self-expression, were made happier by experiential over material purchases. No such experiential advantage emerged for individuals of lower social class, whose lesser resources engender concern with resource management and wise use of limited finances. Instead, lower-class individuals were made happier from material purchases or were equally happy from experiential and material purchases.

Materials Development in Three Italian CALL Projects: Seeking an Optimal Mix between In-Class and Out-of-Class Learning

ERIC Educational Resources Information Center

Levy, Mike; Kennedy, Claire

2010-01-01

This paper considers the design and development of CALL materials with the aim of achieving an optimal mix between in-class and out-of-class learning in the context of teaching Italian at an Australian university. The authors discuss three projects in relation to the following themes: (a) conceptions of the in-class/out-of-class relationship, (b)…

46 CFR 148.150 - Stowage and segregation for materials of Class 9.

Code of Federal Regulations, 2011 CFR

2011-10-01

... by this section. (b) Ammonium nitrate fertilizer of Class 9 must be segregated as required for Class... hold or compartment from readily combustible materials, chlorates, hypochlorites, nitrites...

46 CFR 128.210 - Class II vital systems-materials.

Code of Federal Regulations, 2013 CFR

2013-10-01

... ENGINEERING: EQUIPMENT AND SYSTEMS Materials and Pressure Design § 128.210 Class II vital systems—materials... Commanding Officer, Marine Safety Center, if shown to provide a level of safety equivalent to materials in...

46 CFR 128.210 - Class II vital systems-materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... ENGINEERING: EQUIPMENT AND SYSTEMS Materials and Pressure Design § 128.210 Class II vital systems—materials... Commanding Officer, Marine Safety Center, if shown to provide a level of safety equivalent to materials in...

46 CFR 128.210 - Class II vital systems-materials.

Code of Federal Regulations, 2010 CFR

2010-10-01

... ENGINEERING: EQUIPMENT AND SYSTEMS Materials and Pressure Design § 128.210 Class II vital systems—materials... Commanding Officer, Marine Safety Center, if shown to provide a level of safety equivalent to materials in...

46 CFR 128.210 - Class II vital systems-materials.

Code of Federal Regulations, 2012 CFR

2012-10-01

... ENGINEERING: EQUIPMENT AND SYSTEMS Materials and Pressure Design § 128.210 Class II vital systems—materials... Commanding Officer, Marine Safety Center, if shown to provide a level of safety equivalent to materials in...

46 CFR 128.210 - Class II vital systems-materials.

Code of Federal Regulations, 2014 CFR

2014-10-01

... ENGINEERING: EQUIPMENT AND SYSTEMS Materials and Pressure Design § 128.210 Class II vital systems—materials... Commanding Officer, Marine Safety Center, if shown to provide a level of safety equivalent to materials in...

Applying the Quality Matters (QM)™ Rubric to Improve Online Business Course Materials

ERIC Educational Resources Information Center

Woods, Dexter R., Jr.

2014-01-01

Online classes, hybrid or blended classes, and web-facilitated classes all employ online materials, which instructors and students are using at ever-increasing rates. Accordingly, instructors should continuously evaluate the effectiveness of such online materials. This paper sets forth the author's initial attempts to analyze a business course…

Dynamic fracture toughness of ASME SA508 Class 2a ASME SA533 grade A Class 2 base and heat affected zone material and applicable weld metals

DOE Office of Scientific and Technical Information (OSTI.GOV)

Logsdon, W.A.; Begley, J.A.; Gottshall, C.L.

1978-03-01

The ASME Boiler and Pressure Vessel Code, Section III, Article G-2000, requires that dynamic fracture toughness data be developed for materials with specified minimum yield strengths greater than 50 ksi to provide verification and utilization of the ASME specified minimum reference toughness K/sub IR/ curve. In order to qualify ASME SA508 Class 2a and ASME SA533 Grade A Class 2 pressure vessel steels (minimum yield strengths equal 65 kip/in./sup 2/ and 70 kip/in./sup 2/, respectively) per this requirement, dynamic fracture toughness tests were performed on these materials. All dynamic fracture toughness values of SA508 Class 2a base and HAZ material,more » SA533 Grade A Class 2 base and HAZ material, and applicable weld metals exceeded the ASME specified minimum reference toughness K/sub IR/ curve.« less

Alternative Fuels Compatibility with Army Equipment Testing - Alternative Fuels Material Compatibility Analysis

DTIC Science & Technology

2012-02-21

Testing and Materials °C Celsius DiEGME Diethylene Glycol Monomethyl Ether EPDM Ethylene Propylene Diene Monomer FARE Forward Area Refueling...urethane class AU, polyether urethane class EU, EPDM , Viton®, fluorosilicone class FQ, polytetrafluoroethylene (PTFE), polyolefin and polyester...sleeve Material not provided AAFARS 4720-00-540-1368 Hose, nonmetallic Material not provided AAFARS 4720-01-218-6958 Hose, preformed Rubber

The same teacher, the same curriculum materials, different schools: What is the enacted curriculum?

NASA Astrophysics Data System (ADS)

Eisenmann, Tammy

This research examines how the same teacher implements the same curriculum material in two different schools. The aim of the study is to examine how the enacted algebra curriculum may change when the same teacher enacts the same written curriculum materials in different classes. This research comprises two case studies. Each case examines one teacher who taught the beginning of the mathematical topic "equivalent algebraic expressions", to two 7th grade classes from different schools. The same textbook was used in all four classes. The data collected includes: 1. Observations: 25930 lessons throughout the school year in each of the participating classes; Other mathematics classes in each of the schools; Other non9mathematics classes in the participating classes. A total of 130 lessons were observed. The observations included continuous observations of the teaching of "equivalent algebraic expressions" (15919 lessons) in each class. These observations are the main data source of this research; 2. Interviews with the teachers; 3. Informal conversations; and 4. Field notes. The data was analyzed both through quantitative and qualitative analysis. The research focuses on the following two aspects of the enacted curriculum: implementation of the recommendation that appeared in the curriculum materials and the types of algebraic activity that the students were exposed to during the teaching of the mathematical topic. Kieran's framework (Kieran, 1996, 2004), which distinguishes between three types of algebraic activities 9 generational, transformational and global/meta9level 9 was employed for the examination of the algebraic activities. Comparisons were made for two aspects of the research: between the enacted curriculum in each of the classes and the curriculum materials; and between each of the classes taught by same teacher. It was found that in case study 1, that examined teacher Sara and schools Carmel and Tavor -- most of the recommendations for instruction that appeared in the curriculum materials, were implemented: The students were exposed to the main mathematical subjects/ideas and the mathematical sequence that appeared in the curriculum materials; the lesson structure was similar to the recommended structure, and did not include work on assignments that were not recommended in the curriculum materials. In spite of the similarities in each of the classes, and the curriculum materials, and between the two classes -- a few differences were found, mainly while comparing the enactment in Tavor versus the recommendations in the curriculum materials and the enactment in Carmel. Examination of the algebraic types of activities that the students were exposed to in Carmel and Tavor schools throughout the school year shows that, although the students in the two schools were not required to deal with a similar number of assignments and tasks, in both schools they were exposed to the three types of algebraic activities in similar distribution as appear in the curriculum materials. The focus on the algebraic types of activities exposed to during the whole class work, shows that a significantly lesser percentage of global/meta9level activities was enacted in Tavor. In Tavor, teacher Sara omitted global/meta level activities that appear in the curriculum materials and in addition, there were several cases in which the same assignment/task was enacted in Carmel as a global/meta9level activity but was not enacted in Tavor. In case study 2, which included teacher Rebecca and schools Gamla and Arbel, not all the recommendations in the curriculum material were enacted. Indeed, in both classes the main mathematics subjects/ideas intended for this topic according to the curriculum materials were presented to the students, and the topic was taught according to the mathematical sequence that appeared in the curriculum materials, however in both classes the lesson structures were different from the intended structure -- unintended assignments were enacted, and some of the assignments were enacted not according to their purpose (for example, an assignment that was intended for group work was given as homework). These differences were found in comparison of each of the classes to the curriculum materials and in comparison between Gamla and Arbel. Examination of the algebraic types of activities that the students were exposed to in both classes throughout the school year as well as in the whole class -- shows differences originating from both transformational and global/meta9level algebraic activities. It was found that in Gamla more global/meta9level activities were enacted, as compared to the curriculum materials and the enactment in Arbel. In Arbel, however, emphasis was given to transformational activities as compared to the curriculum materials and enactment in Gamla. In addition it was found that there is also a difference in the way both teachers, Sara and Rebecca, perceived the curriculum materials, and that this perception is expressed in the different way each of them used the curriculum materials in their classes. (Abstract shortened by UMI.)

49 CFR 176.400 - Stowage of Division 1.5, Class 4 (flammable solids) and Class 5 (oxidizers and organic peroxides...

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 2 2013-10-01 2013-10-01 false Stowage of Division 1.5, Class 4 (flammable solids... Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY VESSEL Detailed Requirements for Class 4 (Flammable...

49 CFR 176.400 - Stowage of Division 1.5, Class 4 (flammable solids) and Class 5 (oxidizers and organic peroxides...

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 2 2012-10-01 2012-10-01 false Stowage of Division 1.5, Class 4 (flammable solids... Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY VESSEL Detailed Requirements for Class 4 (Flammable...

49 CFR 176.400 - Stowage of Division 1.5, Class 4 (flammable solids) and Class 5 (oxidizers and organic peroxides...

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 2 2014-10-01 2014-10-01 false Stowage of Division 1.5, Class 4 (flammable solids... Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY VESSEL Detailed Requirements for Class 4 (Flammable...

High-temperature elastic-plastic and creep properties for SA533 Grade B Class I and SA508 materials

DOE Office of Scientific and Technical Information (OSTI.GOV)

Reddy, G.B.; Ayres, D.J.

1982-12-01

High temperature elastic-plastic and creep properties are presented for SA533 Grade B Class I and SA508 Class II materials. These properties are derived from tests conducted at Combustion Engineering Material and Metallurgical Laboratories and cover the temperature range of 70/sup 0/F to 1200/sup 0/F.

49 CFR 173.154 - Exceptions for Class 8 (corrosive materials).

Code of Federal Regulations, 2011 CFR

2011-10-01

... substance, hazardous waste, marine pollutant, or is offered for transportation and transported by aircraft... for a hazardous substance, a hazardous waste, or a marine pollutant, a material classed as a Class 8...

76 FR 82163 - Hazardous Materials: Harmonization With the United Nations Recommendations on the Transport of...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-12-30

... combination packagings prohibit Class 1 (explosive) and Class 7 (radioactive) material to be offered for... transportation, Packaging and containers, Radioactive materials, Reporting and recordkeeping requirements... material, packing group assignments, special provisions, packaging authorizations, packaging sections, air...

49 CFR 176.116 - General stowage conditions for Class 1 (explosive) materials.

Code of Federal Regulations, 2012 CFR

2012-10-01

... stowage conditions for Class 1 (explosive) materials. (a) Heat and sources of ignition: (1) Class 1... on board. Stowage must be well away from all sources of heat, including steam pipes, heating coils... addition to this separation, there must be insulation to Class A60 standard as defined in 46 CFR 72.05-10(a...

49 CFR 176.116 - General stowage conditions for Class 1 (explosive) materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... stowage conditions for Class 1 (explosive) materials. (a) Heat and sources of ignition: (1) Class 1... on board. Stowage must be well away from all sources of heat, including steam pipes, heating coils... addition to this separation, there must be insulation to Class A60 standard as defined in 46 CFR 72.05-10(a...

49 CFR 176.116 - General stowage conditions for Class 1 (explosive) materials.

Code of Federal Regulations, 2010 CFR

2010-10-01

... stowage conditions for Class 1 (explosive) materials. (a) Heat and sources of ignition: (1) Class 1... on board. Stowage must be well away from all sources of heat, including steam pipes, heating coils... addition to this separation, there must be insulation to Class A60 standard as defined in 46 CFR 72.05-10(a...

Materials for advanced rocket engine turbopump turbine blades

NASA Technical Reports Server (NTRS)

Chandler, W. T.

1985-01-01

A study program was conducted to identify those materials that will provide the greatest benefits as turbine blades for advanced liquid propellant rocket engine turbines and to prepare technology plans for the development of those materials for use in the 1990 through 1995 period. The candidate materials were selected from six classes of materials: single-crystal (SC) superalloys, oxide dispersion-strengthened (ODS) superalloys, rapid solidification processed (RSP) superalloys, directionally solidified eutectic (DSE) superalloys, fiber-reinforced superalloy (FRS) composites, and ceramics. Properties of materials from the six classes were compiled and evaluated and property improvements were projected approximately 5 years into the future for advanced versions of materials in each of the six classes.

49 CFR 176.134 - Vehicles.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Vehicles. 176.134 Section 176.134 Transportation... Class 1 (Explosive) Materials Stowage § 176.134 Vehicles. Closed vehicles may be used to transport Class... requirements relating to the transport of Class 1 (explosive) materials in vehicles. ...

49 CFR 176.134 - Vehicles.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 2 2012-10-01 2012-10-01 false Vehicles. 176.134 Section 176.134 Transportation... Class 1 (Explosive) Materials Stowage § 176.134 Vehicles. Closed vehicles may be used to transport Class... requirements relating to the transport of Class 1 (explosive) materials in vehicles. ...

49 CFR 176.134 - Vehicles.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Vehicles. 176.134 Section 176.134 Transportation... Class 1 (Explosive) Materials Stowage § 176.134 Vehicles. Closed vehicles may be used to transport Class... requirements relating to the transport of Class 1 (explosive) materials in vehicles. ...

49 CFR 176.168 - Transport of Class 1 (explosive) materials in vehicle spaces.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 2 2012-10-01 2012-10-01 false Transport of Class 1 (explosive) materials in vehicle spaces. 176.168 Section 176.168 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY VESSEL Detailed...

The Self-Identified Skills and Competencies of First-Line Nurse Managers

DTIC Science & Technology

1992-06-01

teaching, with the exception of evaluation of patient education classes and materials. 17 Human Resources Development. 1) selection. with the exception of...specifically being able to evaluate patient education classes and materials; and 2) evaluating results, by being able to monitor the quality of care...for patient education materials and classes to be used on the unit. 2. Evaluate patient and family teaching including discharge planning. 3. Evaluate

Candidate materials for advanced fire-resistant photovoltaic modules

NASA Technical Reports Server (NTRS)

Sugimura, R. S.; Otth, D. H.; Ross, R. G., Jr.; Arnett, J. C.; Samuelson, G.

1985-01-01

A cooperative, cost-sharing research effort to develop a technology base required to construct fire-ratable photovoltaic modules has resulted in the identification of several high-temperature, back-surface candidate materials capable of raising the fire-resistance of modules using hydrocarbon encapsulants to Class A and B levels. Advanced experimental module configurations have been developed using back surfaces consisting of Kapton, Tedlar laminates, metal-foils, and fiberglass materials with high-temperature coatings. Test results (October 1984; March 1985; May 1985; and October 1985) indicate that several of these advanced module configurations are capable of achieving Class B fire-resistance levels, while a few configurations can achieve Class A levels. The paper summarizes activities to date, discussing flammability failure mechanisms, time-temperature profiles, and results of Block V environmental exposure tests of a candidate material suitable for both Class B and Class A fire-resistance levels.

49 CFR 176.108 - Supervision of Class 1 (explosive) materials during loading, unloading, handling and stowage.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Supervision of Class 1 (explosive) materials during loading, unloading, handling and stowage. 176.108 Section 176.108 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS...

49 CFR 179.200 - General specifications applicable to non-pressure tank car tanks (Class DOT-111).

Code of Federal Regulations, 2010 CFR

2010-10-01

... tank car tanks (Class DOT-111). 179.200 Section 179.200 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS SPECIFICATIONS FOR TANK CARS Specifications for Non-Pressure Tank Car Tanks (Classes...

Rocks of the Columbia Hills

USGS Publications Warehouse

Squyres, S. W.; Arvidson, R. E.; Blaney, D.L.; Clark, B. C.; Crumpler, L.; Farrand, W. H.; Gorevan, S.; Herkenhoff, K. E.; Hurowitz, J.; Kusack, A.; McSween, H.Y.; Ming, D. W.; Morris, R.V.; Ruff, S.W.; Wang, A.; Yen, A.

2006-01-01

The Mars Exploration Rover Spirit has identified five distinct rock types in the Columbia Hills of Gusev crater. Clovis Class rock is a poorly sorted clastic rock that has undergone substantial aqueous alteration. We interpret it to be aqueously altered ejecta deposits formed by impacts into basaltic materials. Wishstone Class rock is also a poorly sorted clastic rock that has a distinctive chemical composition that is high in Ti and P and low in Cr. Wishstone Class rock may be pyroclastic or impact in origin. Peace Class rock is a sedimentary material composed of ultramafic sand grains cemented by significant quantities of Mg- and Ca-sulfates. Peace Class rock may have formed when water briefly saturated the ultramafic sands and evaporated to allow precipitation of the sulfates. Watchtower Class rocks are similar chemically to Wishstone Class rocks and have undergone widely varying degrees of near-isochemical aqueous alteration. They may also be ejecta deposits, formed by impacts into Wishstone-rich materials and altered by small amounts of water. Backstay Class rocks are basalt/trachybasalt lavas that were emplaced in the Columbia Hills after the other rock classes were, either as impact ejecta or by localized volcanic activity. The geologic record preserved in the rocks of the Columbia Hills reveals a period very early in Martian history in which volcanic materials were widespread, impact was a dominant process, and water was commonly present. Copyright 2006 by the American Geophysical Union.

The Rocks of the Columbia Hills

NASA Technical Reports Server (NTRS)

Squyres, Steven W.; Arvidson, Raymond E.; Blaney, Diana L.; Clark, Benton C.; Crumpler, Larry; Farrand, William H.; Gorevan, Stephen; Herkenhoff, Kenneth; Hurowitz, Joel; Kusack, Alastair;

Unraveling metamaterial properties in zigzag-base folded sheets.

PubMed

Eidini, Maryam; Paulino, Glaucio H

2015-09-01

Creating complex spatial objects from a flat sheet of material using origami folding techniques has attracted attention in science and engineering. In the present work, we use the geometric properties of partially folded zigzag strips to better describe the kinematics of known zigzag/herringbone-base folded sheet metamaterials such as Miura-ori. Inspired by the kinematics of a one-degree of freedom zigzag strip, we introduce a class of cellular folded mechanical metamaterials comprising different scales of zigzag strips. This class of patterns combines origami folding techniques with kirigami. Using analytical and numerical models, we study the key mechanical properties of the folded materials. We show that our class of patterns, by expanding on the design space of Miura-ori, is appropriate for a wide range of applications from mechanical metamaterials to deployable structures at small and large scales. We further show that, depending on the geometry, these materials exhibit either negative or positive in-plane Poisson's ratios. By introducing a class of zigzag-base materials in the current study, we unify the concept of in-plane Poisson's ratio for similar materials in the literature and extend it to the class of zigzag-base folded sheet materials.

The implementation of integrated science teaching materials based socio-scientific issues to improve students scientific literacy for environmental pollution theme

NASA Astrophysics Data System (ADS)

Yenni, Rita; Hernani, Widodo, Ari

2017-05-01

The study aims to determine the increasing of students' science literacy skills on content aspects and competency of science by using Integrated Science teaching materials based Socio-scientific Issues (SSI) for environmental pollution theme. The method used in the study is quasi-experiment with nonequivalent pretest and posttest control group design. The students of experimental class used teaching materials based SSI, whereas the students of control class were still using the usual textbooks. The result of this study showed a significant difference between the value of N-gain of experimental class and control class, whichalso occurred in every indicator of content aspects and competency of science. This result indicates that using of Integrated Science teaching materials based SSI can improve content aspect and competency of science and can be used as teaching materials alternative in teaching of Integrated Science.

The Impact of Coordination Methods on the Enhancement of Business Writing

ERIC Educational Resources Information Center

Prater, Edmund; Rhee, Hyeun-Suk

2003-01-01

Universities with limited resources are being pressured to cover more material within their degree programs. Because of this, schools are looking to integrate material from different classes. This paper sets out to determine if students can learn business writing within the context of another class, specifically, an information systems class. The…

Teaching Shakespeare: Materials and Outcomes for Web-Based Instruction and Class Adjunct.

ERIC Educational Resources Information Center

Schwartz, Helen J.

Multimedia hypertext materials have instructional advantages when used as adjuncts in traditional classes and as the primary means of instruction, as illustrated in this case study of college-level Shakespeare classes. Plays become more accessible through use of audio and video resources, including video clips from play productions. Student work…

49 CFR 176.172 - Structural serviceability of freight containers and vehicles carrying Class 1 (explosive...

Code of Federal Regulations, 2011 CFR

2011-10-01

... serviceability of freight containers and vehicles carrying Class 1 (explosive) materials on ships. (a) Except for... 49 Transportation 2 2011-10-01 2011-10-01 false Structural serviceability of freight containers and vehicles carrying Class 1 (explosive) materials on ships. 176.172 Section 176.172 Transportation...

49 CFR 176.172 - Structural serviceability of freight containers and vehicles carrying Class 1 (explosive...

Code of Federal Regulations, 2013 CFR

2013-10-01

... serviceability of freight containers and vehicles carrying Class 1 (explosive) materials on ships. (a) Except for... 49 Transportation 2 2013-10-01 2013-10-01 false Structural serviceability of freight containers and vehicles carrying Class 1 (explosive) materials on ships. 176.172 Section 176.172 Transportation...

49 CFR 176.172 - Structural serviceability of freight containers and vehicles carrying Class 1 (explosive...

Code of Federal Regulations, 2014 CFR

2014-10-01

... serviceability of freight containers and vehicles carrying Class 1 (explosive) materials on ships. (a) Except for... 49 Transportation 2 2014-10-01 2014-10-01 false Structural serviceability of freight containers and vehicles carrying Class 1 (explosive) materials on ships. 176.172 Section 176.172 Transportation...

Handbook for inventorying downed woody material

Treesearch

James K. Brown

1974-01-01

To facilitate debris management, procedures for inventorying downed woody material are presented. Instructions show how to estimate weights and volumes of downed woody material, fuel depth, and duff depth. Using the planar intersect technique, downed material is inventoried by 0- to 0.25-inch, 0.25- to 1-inch, and 1- to 3-inch diameter classes; and by 1-inch classes...

Welding Supplementary Units.

ERIC Educational Resources Information Center

Johnson, Don; And Others

This document contains supplemental materials for special needs high school students intended to facilitate their mainstreaming in regular welding classes. Teacher's materials precede the materials for students and include general notes for the instructor, suggestions, eight references, a class progress chart, a questionnaire on the usefulness of…

49 CFR 176.156 - Defective packages.

Code of Federal Regulations, 2010 CFR

2010-10-01

... packages. (a) No leaking, broken, or otherwise defective package containing Class 1 (explosive) materials.... (b) No Class 1 (explosive) material, which for any reason has deteriorated or undergone a change of...

Curriculum Differential Enactment: The Interplay of Teacher, Class, and Curriculum Materials

ERIC Educational Resources Information Center

Eisenmann, Tammy

2011-01-01

Curriculum materials' developers typically assume the existence of certain general social-educational classroom practices and norms. Conversely, the current study addresses the effects of context on curriculum enactment, focusing on the interrelations between teacher, class and curriculum materials. Each of the two case studies presented herein…

Field-structured material media and methods for synthesis thereof

DOEpatents

Martin, James E.; Hughes, Robert C.; Anderson, Robert A.

2001-09-18

The present application is directed to a new class of composite materials, called field-structured composite (FSC) materials, which comprise a oriented aggregate structure made of magnetic particles suspended in a nonmagnetic medium, and to a new class of processes for their manufacture. FSC materials have much potential for application, including use in chemical, optical, environmental, and mechanical sensors.

46 CFR 108.135 - Boundary bulkheads, decks of galleys, and combustible material lockers.

Code of Federal Regulations, 2013 CFR

2013-10-01

... material lockers. 108.135 Section 108.135 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Protection § 108.135 Boundary bulkheads, decks of galleys, and combustible material lockers. Each boundary... storage locker must be an A class bulkhead and A class deck respectively. ...

46 CFR 108.135 - Boundary bulkheads, decks of galleys, and combustible material lockers.

Code of Federal Regulations, 2014 CFR

2014-10-01

... material lockers. 108.135 Section 108.135 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Protection § 108.135 Boundary bulkheads, decks of galleys, and combustible material lockers. Each boundary... storage locker must be an A class bulkhead and A class deck respectively. ...

46 CFR 108.135 - Boundary bulkheads, decks of galleys, and combustible material lockers.

Code of Federal Regulations, 2011 CFR

2011-10-01

... material lockers. 108.135 Section 108.135 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Protection § 108.135 Boundary bulkheads, decks of galleys, and combustible material lockers. Each boundary... storage locker must be an A class bulkhead and A class deck respectively. ...

46 CFR 108.135 - Boundary bulkheads, decks of galleys, and combustible material lockers.

Code of Federal Regulations, 2012 CFR

2012-10-01

... material lockers. 108.135 Section 108.135 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Protection § 108.135 Boundary bulkheads, decks of galleys, and combustible material lockers. Each boundary... storage locker must be an A class bulkhead and A class deck respectively. ...

46 CFR 108.135 - Boundary bulkheads, decks of galleys, and combustible material lockers.

Code of Federal Regulations, 2010 CFR

2010-10-01

... material lockers. 108.135 Section 108.135 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED... Protection § 108.135 Boundary bulkheads, decks of galleys, and combustible material lockers. Each boundary... storage locker must be an A class bulkhead and A class deck respectively. ...

Environmental Protection for Hazardous Materials Incidents. Volume 1. Hazardous Materials Incident Management System

DTIC Science & Technology

1990-11-01

radioactive) - Determine class of HAZMAT (Class A Explosive, Class B Explosive, Class C Explosive, Blasting Agent , Flammable Gas , Non- flammable Gas ... agent . Specific health and safety plans related to IRP actions amy be obtained from the same source. 2. Interaction of Fire Departments with the...such as digging near a gas line, a fuel tank, or buried explo- sives, the fire department would be briefed before beginning the work, and, under

49 CFR 173.212 - Non-bulk packagings for solid hazardous materials in Packing Group II.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Non-bulk packagings for solid hazardous materials... Hazardous Materials Other Than Class 1 and Class 7 § 173.212 Non-bulk packagings for solid hazardous materials in Packing Group II. (a) When § 172.101 of this subchapter specifies that a solid hazardous...

49 CFR 173.212 - Non-bulk packagings for solid hazardous materials in Packing Group II.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Non-bulk packagings for solid hazardous materials... Hazardous Materials Other Than Class 1 and Class 7 § 173.212 Non-bulk packagings for solid hazardous materials in Packing Group II. (a) When § 172.101 of this subchapter specifies that a solid hazardous...

49 CFR 173.213 - Non-bulk packagings for solid hazardous materials in Packing Group III.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Non-bulk packagings for solid hazardous materials... Hazardous Materials Other Than Class 1 and Class 7 § 173.213 Non-bulk packagings for solid hazardous materials in Packing Group III. (a) When § 172.101 of this subchapter specifies that a solid hazardous...

49 CFR 173.211 - Non-bulk packagings for solid hazardous materials in Packing Group I.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Non-bulk packagings for solid hazardous materials... Hazardous Materials Other Than Class 1 and Class 7 § 173.211 Non-bulk packagings for solid hazardous materials in Packing Group I. (a) When § 172.101 of this subchapter specifies that a solid hazardous...

49 CFR 173.213 - Non-bulk packagings for solid hazardous materials in Packing Group III.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Non-bulk packagings for solid hazardous materials... Hazardous Materials Other Than Class 1 and Class 7 § 173.213 Non-bulk packagings for solid hazardous materials in Packing Group III. (a) When § 172.101 of this subchapter specifies that a solid hazardous...

49 CFR 173.211 - Non-bulk packagings for solid hazardous materials in Packing Group I.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Non-bulk packagings for solid hazardous materials... Hazardous Materials Other Than Class 1 and Class 7 § 173.211 Non-bulk packagings for solid hazardous materials in Packing Group I. (a) When § 172.101 of this subchapter specifies that a solid hazardous...

49 CFR 107.107 - Application for party status.

Code of Federal Regulations, 2011 CFR

2011-10-01

... for Hazardous Materials Safety (Attention: General Approvals and Permits, PHH-31), Pipeline and... with § 105.40 of part. (5) For a Class 1 material that is forbidden for transportation by aircraft... from an applicant for party status to a special permit to transport such Class 1 material on passenger...

Developing Instructional Materials on English Oral Communication for Nursing Schools

ERIC Educational Resources Information Center

Sismiati; Adnan Latief, Mohammad

2012-01-01

The needs survey shows that English communication skill of the students in nursing school speaking classes is not well developed. Consequently, the speaking instructional materials used in the classes need to be advanced. Yalden's (1987) Language Program Development covering Needs Analysis, Syllabus and Materials Development, Expert Validation,…

49 CFR 173.173 - Paint, paint-related material, adhesives, ink and resins.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Paint, paint-related material, adhesives, ink and... Than Class 1 and Class 7 § 173.173 Paint, paint-related material, adhesives, ink and resins. (a) When..., paint-related material, adhesives, ink and resins must be packaged as follows: (1) As prescribed in...

49 CFR 173.173 - Paint, paint-related material, adhesives, ink and resins.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 2 2013-10-01 2013-10-01 false Paint, paint-related material, adhesives, ink and... Than Class 1 and Class 7 § 173.173 Paint, paint-related material, adhesives, ink and resins. (a) When..., paint-related material, adhesives, ink and resins must be packaged as follows: (1) As prescribed in...

49 CFR 173.173 - Paint, paint-related material, adhesives, ink and resins.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 2 2012-10-01 2012-10-01 false Paint, paint-related material, adhesives, ink and... Than Class 1 and Class 7 § 173.173 Paint, paint-related material, adhesives, ink and resins. (a) When..., paint-related material, adhesives, ink and resins must be packaged as follows: (1) As prescribed in...

49 CFR 173.173 - Paint, paint-related material, adhesives, ink and resins.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 2 2014-10-01 2014-10-01 false Paint, paint-related material, adhesives, ink and... Than Class 1 and Class 7 § 173.173 Paint, paint-related material, adhesives, ink and resins. (a) When..., paint-related material, adhesives, ink and resins must be packaged as follows: (1) As prescribed in...

49 CFR 173.173 - Paint, paint-related material, adhesives, ink and resins.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Paint, paint-related material, adhesives, ink and... Than Class 1 and Class 7 § 173.173 Paint, paint-related material, adhesives, ink and resins. (a) When..., paint-related material, adhesives, ink and resins must be packaged as follows: (1) As prescribed in...

Nonlinear viscoplasticity in ASPECT: benchmarking and applications to subduction

NASA Astrophysics Data System (ADS)

Glerum, Anne; Thieulot, Cedric; Fraters, Menno; Blom, Constantijn; Spakman, Wim

2018-03-01

ASPECT (Advanced Solver for Problems in Earth's ConvecTion) is a massively parallel finite element code originally designed for modeling thermal convection in the mantle with a Newtonian rheology. The code is characterized by modern numerical methods, high-performance parallelism and extensibility. This last characteristic is illustrated in this work: we have extended the use of ASPECT from global thermal convection modeling to upper-mantle-scale applications of subduction.

Subduction modeling generally requires the tracking of multiple materials with different properties and with nonlinear viscous and viscoplastic rheologies. To this end, we implemented a frictional plasticity criterion that is combined with a viscous diffusion and dislocation creep rheology. Because ASPECT uses compositional fields to represent different materials, all material parameters are made dependent on a user-specified number of fields.

The goal of this paper is primarily to describe and verify our implementations of complex, multi-material rheology by reproducing the results of four well-known two-dimensional benchmarks: the indentor benchmark, the brick experiment, the sandbox experiment and the slab detachment benchmark. Furthermore, we aim to provide hands-on examples for prospective users by demonstrating the use of multi-material viscoplasticity with three-dimensional, thermomechanical models of oceanic subduction, putting ASPECT on the map as a community code for high-resolution, nonlinear rheology subduction modeling.

49 CFR 176.164 - Fire precautions and firefighting.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Class 1 (explosive) materials other than those of Division 1.4 (explosive). No welding, burning, cutting... compartment, including a closed vehicle deck space, which contains Class 1 (explosive) materials must be...

49 CFR 176.164 - Fire precautions and firefighting.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Class 1 (explosive) materials other than those of Division 1.4 (explosive). No welding, burning, cutting... compartment, including a closed vehicle deck space, which contains Class 1 (explosive) materials must be...

49 CFR 107.109 - Application for renewal.

Code of Federal Regulations, 2011 CFR

2011-10-01

... (Attention: General Approvals and Permits, PHH-31), Pipeline and Hazardous Materials Safety Administration, U... authorized in subchapter C. (6) When a Class 1 material is forbidden for transportation by aircraft, except... special permit to transport such Class 1 material on passenger-carrying or cargo-only aircraft with a...

49 CFR 107.105 - Application for special permit.

Code of Federal Regulations, 2011 CFR

2011-10-01

..., must: (i) Be submitted to the Associate Administrator for Hazardous Materials Safety (Attention...; and (13) When a Class 1 material is forbidden for transportation by aircraft except under a special... special permit to transport such Class 1 material on passenger-carrying or cargo-only aircraft with a...

49 CFR 176.172 - Structural serviceability of freight containers and vehicles carrying Class 1 (explosive...

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 2 2012-10-01 2012-10-01 false Structural serviceability of freight containers and vehicles carrying Class 1 (explosive) materials on ships. 176.172 Section 176.172 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS...

46 CFR 160.048-3 - Materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... fabrics shall comply with the requirements of Federal Specification CCC-C-426 for Type I, Class 3 material... not less than 0.008 inch in thickness meeting the requirements of Federal Specification L-P-375 for Type I or II, Class 1, film. (f) Grab straps. The grab straps shall be of materials permitted for the...

Investigation of Effective Material Properties of Stony Meteorites

NASA Technical Reports Server (NTRS)

Agrawal, Parul; Carlozzi, Alex; Bryson, Kathryn

2016-01-01

To assess the threat posed by an asteroid entering Earth's atmosphere, one must predict if, when, and how it fragments during entry. A comprehensive understanding of the Asteroid material properties is needed to achieve this objective. At present, the meteorite material found on Earth are the only objects from an entering asteroid that can be used as representative material and be tested inside a laboratory setting. Therefore, unit cell models are developed to determine the effective material properties of stony meteorites and in turn deduce the properties of asteroids. The unit cell is representative volume that accounts for diverse minerals, porosity, and matrix composition inside a meteorite. The various classes under investigation includes H-class, L-class, and LL-class chondrites. The effective mechanical properties such as Young's Modulus and Poisson's Ratio of the unit cell are calculated by performing several hundreds of Monte-Carlo simulations. Terrestrial analogs such as Basalt and Gabbro are being used to validate the unit cell methodology.

Lithification opf gas-rich chondrite regolith breccias by grain boundary and localized shock melting

NASA Technical Reports Server (NTRS)

Bischoff, A.; Rubin, A. E.; Keil, K.; Stoeffler, D.

1983-01-01

The fine-grained matrices (less than 150 microns) of 14 gas-rich ordinary chondrile regolith breccias were studied in an attempt to decipher the nature of the lithification process that converted loose regolith material into consolidated breccias. It is found that there is a continuouos gradation in matrix textures from nearly completely clastic (class A) to highly cemented (class C) breccias in which the remining clasts are completely surrounded by interstitial, shock-melted material. It is concluded that this interstitial material is formed by shock melting in the porous regolith. In general, the abundances of solar-wind-implanted He-4 and Ne-20 are inversely correlated with the abundance of intenstitial, shock-melted, feldspathic material. Chondrites with the highest abundance of interstitial, melted material (class C) experienced the highest shock pressures and temperatures and suffered the most extensive degassing. It is this interstitial, feldspathic melt that lithifies and cements the breccias together; those breccias with very little interstitial melt (class A) are the most porous and least consolidated.

Aviation Structural Mechanic, Second Class, 2-13. Military Curriculum Materials for Vocational and Technical Education.

ERIC Educational Resources Information Center

Ohio State Univ., Columbus. National Center for Research in Vocational Education.

This self-paced, individualized course, adapted from military curriculum materials for use in vocational and technical education, teaches students the skills needed to become aviation structural mechanics (second class). The course materials consist of five pamphlets covering the structural maintenance and repair of aircraft. The first pamphlet…

Training Teachers and Serving Students: Applying Usability Testing in Writing Programs

ERIC Educational Resources Information Center

McGovern, Heather

2007-01-01

Teachers often test course materials by using them in class. Usability testing provides an alternative: teachers receive student feedback and revise materials "before" teaching a class. Case studies based on interviews and observations with two teaching assistants who usability tested materials before teaching introductory technical writing…

49 CFR 173.230 - Fuel cell cartridges containing hazardous material.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Fuel cell cartridges containing hazardous material... Than Class 1 and Class 7 § 173.230 Fuel cell cartridges containing hazardous material. (a) Requirements for Fuel Cell Cartridges. Fuel cell cartridges, including when contained in or packed with equipment...

Student Outlines Teaching Students to Organize Their Notes

ERIC Educational Resources Information Center

Burt, Derek

2006-01-01

Two years ago I implemented a basic outline of each class for my students to take notes on for Calculus II at the United States Military Academy. The outline provided students with a shell of the class material for each day of class. Their job was to fill in the shell as we went through the material. The outlines provided students an easy method…

Active Learning and Just-in-Time Teaching in a Material and Energy Balances Course

ERIC Educational Resources Information Center

Liberatore, Matthew W.

2013-01-01

The delivery of a material and energy balances course is enhanced through a series of in-class and out-of-class exercises. An active learning classroom is achieved, even at class sizes over 150 students, using multiple instructors in a single classroom, problem solving in teams, problems based on YouTube videos, and just-in-time teaching. To avoid…

49 CFR 177.838 - Class 4 (flammable solid) materials, Class 5 (oxidizing) materials, and Division 4.2 (pyroforic...

Code of Federal Regulations, 2011 CFR

2011-10-01

... closed; pick-up and delivery. All of that portion of the lading of any motor vehicle transporting Class 4... vehicle and shall be covered by such body, by tarpaulins, or other suitable means, and if such motor vehicle has a tailboard or tailgate, it shall be closed and secured in place during such transportation...

Apple IIe Computers and Appleworks Training Mini Course Materials.

ERIC Educational Resources Information Center

Schlenker, Richard M.

The instructional materials included in this document are designed to introduce students to the Apple IIe computer and to the word processing and database portions of the AppleWorks program. The materials are intended for small groups of students, each of whom has use of a computer during class and for short periods between classes. The course…

SRA Economics Materials in Grades One and Two. Evaluation Reports.

ERIC Educational Resources Information Center

Shaver, James P.; Larkins, A. Guy

A class of first graders and a class of second graders in four Salt Lake City schools comprised the experimental sample in a study whose objectives were (1) to develop a test for assessing learning with "Our Working World" materials, published by Science Research Associate (SRA), and (2) to determine if students using the materials made…

Metal-organic frameworks and their derived materials for electrochemical energy storage and conversion: Promises and challenges.

PubMed

Wu, Hao Bin; Lou, Xiong Wen David

2017-12-01

In addition to their conventional uses, metal-organic frameworks (MOFs) have recently emerged as an interesting class of functional materials and precursors of inorganic materials for electrochemical energy storage and conversion technologies. This class of MOF-related materials can be broadly categorized into two groups: pristine MOF-based materials and MOF-derived functional materials. Although the diversity in composition and structure leads to diverse and tunable functionalities of MOF-based materials, it appears that much more effort in this emerging field is devoted to synthesizing MOF-derived materials for electrochemical applications. This is in view of two main drawbacks of MOF-based materials: the low conductivity nature and the stability issue. On the contrary, MOF-derived synthesis strategies have substantial advantages in controlling the composition and structure of MOF-derived materials. From this perspective, we review some emerging applications of both groups of MOF-related materials as electrode materials for rechargeable batteries and electrochemical capacitors, efficient electrocatalysts, and even electrolytes for electrochemical devices. By highlighting the advantages and challenges of each class of materials for different applications, we hope to shed some light on the future development of this highly exciting area.

Metal-organic frameworks and their derived materials for electrochemical energy storage and conversion: Promises and challenges

PubMed Central

Wu, Hao Bin; Lou, Xiong Wen (David)

2017-01-01

In addition to their conventional uses, metal-organic frameworks (MOFs) have recently emerged as an interesting class of functional materials and precursors of inorganic materials for electrochemical energy storage and conversion technologies. This class of MOF-related materials can be broadly categorized into two groups: pristine MOF-based materials and MOF-derived functional materials. Although the diversity in composition and structure leads to diverse and tunable functionalities of MOF-based materials, it appears that much more effort in this emerging field is devoted to synthesizing MOF-derived materials for electrochemical applications. This is in view of two main drawbacks of MOF-based materials: the low conductivity nature and the stability issue. On the contrary, MOF-derived synthesis strategies have substantial advantages in controlling the composition and structure of MOF-derived materials. From this perspective, we review some emerging applications of both groups of MOF-related materials as electrode materials for rechargeable batteries and electrochemical capacitors, efficient electrocatalysts, and even electrolytes for electrochemical devices. By highlighting the advantages and challenges of each class of materials for different applications, we hope to shed some light on the future development of this highly exciting area. PMID:29214220

49 CFR 173.2 - Hazardous materials classes and index to hazard class definitions.

Code of Federal Regulations, 2013 CFR

2013-10-01

....50 1 1.6 Extremely insensitive detonating substances 173.50 2 2.1 Flammable gas 173.115 2 2.2 Non-flammable compressed gas 173.115 2 2.3 Poisonous gas 173.115 3 Flammable and combustible liquid 173.120 4 4... PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS...

49 CFR 173.2 - Hazardous materials classes and index to hazard class definitions.

Code of Federal Regulations, 2014 CFR

2014-10-01

....50 1 1.6 Extremely insensitive detonating substances 173.50 2 2.1 Flammable gas 173.115 2 2.2 Non-flammable compressed gas 173.115 2 2.3 Poisonous gas 173.115 3 Flammable and combustible liquid 173.120 4 4... PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS...

49 CFR 173.2 - Hazardous materials classes and index to hazard class definitions.

Code of Federal Regulations, 2011 CFR

2011-10-01

....50 1 1.6 Extremely insensitive detonating substances 173.50 2 2.1 Flammable gas 173.115 2 2.2 Non-flammable compressed gas 173.115 2 2.3 Poisonous gas 173.115 3 Flammable and combustible liquid 173.120 4 4... PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS...

49 CFR 173.2 - Hazardous materials classes and index to hazard class definitions.

Code of Federal Regulations, 2010 CFR

2010-10-01

....50 1 1.6 Extremely insensitive detonating substances 173.50 2 2.1 Flammable gas 173.115 2 2.2 Non-flammable compressed gas 173.115 2 2.3 Poisonous gas 173.115 3 Flammable and combustible liquid 173.120 4 4... PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS...

Detecting Unknown Artificial Urban Surface Materials Based on Spectral Dissimilarity Analysis.

PubMed

Jilge, Marianne; Heiden, Uta; Habermeyer, Martin; Mende, André; Juergens, Carsten

2017-08-08

High resolution imaging spectroscopy data have been recognised as a valuable data resource for augmenting detailed material inventories that serve as input for various urban applications. Image-specific urban spectral libraries are successfully used in urban imaging spectroscopy studies. However, the regional- and sensor-specific transferability of such libraries is limited due to the wide range of different surface materials. With the developed methodology, incomplete urban spectral libraries can be utilised by assuming that unknown surface material spectra are dissimilar to the known spectra in a basic spectral library (BSL). The similarity measure SID-SCA (Spectral Information Divergence-Spectral Correlation Angle) is applied to detect image-specific unknown urban surfaces while avoiding spectral mixtures. These detected unknown materials are categorised into distinct and identifiable material classes based on their spectral and spatial metrics. Experimental results demonstrate a successful redetection of material classes that had been previously erased in order to simulate an incomplete BSL. Additionally, completely new materials e.g., solar panels were identified in the data. It is further shown that the level of incompleteness of the BSL and the defined dissimilarity threshold are decisive for the detection of unknown material classes and the degree of spectral intra-class variability. A detailed accuracy assessment of the pre-classification results, aiming to separate natural and artificial materials, demonstrates spectral confusions between spectrally similar materials utilizing SID-SCA. However, most spectral confusions occur between natural or artificial materials which are not affecting the overall aim. The dissimilarity analysis overcomes the limitations of working with incomplete urban spectral libraries and enables the generation of image-specific training databases.

Detecting Unknown Artificial Urban Surface Materials Based on Spectral Dissimilarity Analysis

PubMed Central

Jilge, Marianne; Heiden, Uta; Habermeyer, Martin; Mende, André; Juergens, Carsten

2017-01-01

High resolution imaging spectroscopy data have been recognised as a valuable data resource for augmenting detailed material inventories that serve as input for various urban applications. Image-specific urban spectral libraries are successfully used in urban imaging spectroscopy studies. However, the regional- and sensor-specific transferability of such libraries is limited due to the wide range of different surface materials. With the developed methodology, incomplete urban spectral libraries can be utilised by assuming that unknown surface material spectra are dissimilar to the known spectra in a basic spectral library (BSL). The similarity measure SID-SCA (Spectral Information Divergence-Spectral Correlation Angle) is applied to detect image-specific unknown urban surfaces while avoiding spectral mixtures. These detected unknown materials are categorised into distinct and identifiable material classes based on their spectral and spatial metrics. Experimental results demonstrate a successful redetection of material classes that had been previously erased in order to simulate an incomplete BSL. Additionally, completely new materials e.g., solar panels were identified in the data. It is further shown that the level of incompleteness of the BSL and the defined dissimilarity threshold are decisive for the detection of unknown material classes and the degree of spectral intra-class variability. A detailed accuracy assessment of the pre-classification results, aiming to separate natural and artificial materials, demonstrates spectral confusions between spectrally similar materials utilizing SID-SCA. However, most spectral confusions occur between natural or artificial materials which are not affecting the overall aim. The dissimilarity analysis overcomes the limitations of working with incomplete urban spectral libraries and enables the generation of image-specific training databases. PMID:28786947

Lateral-access Class II restoration using resin-modified glass-ionomer or silver-cermet cement.

PubMed

Croll, T P

1995-02-01

Direct-access preparation of a carious proximal surface is perhaps the most conservative approach to restoration. Physical properties and handling characteristics of silver amalgam and of resin composite and lack of fluoride ion release make these materials unsuitable for direct buccal- or lingual-access proximal restoration. Insufficient strengths and radiolucency of self-hardening glass-ionomer cements preclude their use for Class II restorations. However, glass-ionomer silver-cermet cement and some resin-modified glass-ionomer materials are proving useful for non-stress-bearing Class II restorations and may have applications in preventive dentistry. This article describes lateral-access Class II restoration with modified glass-ionomer cements. Emphasis is placed on careful handling of materials, maintenance of an ideal operative field, and conservation of tooth structure.

New materials and structures for photovoltaics

NASA Astrophysics Data System (ADS)

Zunger, Alex; Wagner, S.; Petroff, P. M.

1993-01-01

Despite the fact that over the years crystal chemists have discovered numerous semiconducting substances, and that modern epitaxial growth techniques are able to produce many novel atomic-scale architectures, current electronic and opto-electronic technologies are based but on a handful of ˜10 traditional semiconductor core materials. This paper surveys a number of yet-unexploited classes of semiconductors, pointing to the much-needed research in screening, growing, and characterizing promising members of these classes. In light of the unmanageably large number of a-priori possibilities, we emphasize the role that structural chemistry and modern computer-aided design must play in screening potentially important candidates. The basic classes of materials discussed here include nontraditional alloys, such as non-isovalent and heterostructural semiconductors, materials at reduced dimensionality, including superlattices, zeolite-caged nanostructures and organic semiconductors, spontaneously ordered alloys, interstitial semiconductors, filled tetrahedral structures, ordered vacancy compounds, and compounds based on d and f electron elements. A collaborative effort among material predictor, material grower, and material characterizer holds the promise for a successful identification of new and exciting systems.

Umweltverschmutzung. German Ecology Packet: Resource Units and Materials for German Classes at All Levels.

ERIC Educational Resources Information Center

Archer, Julie; And Others

Supplementary resource materials for use in upper level secondary school German classes are presented in this text. Teachers who are seeking new content and are willing to adapt these instructional materials on ecology in Germany will find three self-contained units on: The Plight of the Polar Bear, Polluted Swimming Pools in Germany, and Dead…

Student versus Faculty Perceptions of Missing Class.

ERIC Educational Resources Information Center

Sleigh, Merry J.; Ritzer, Darren R.; Casey, Michael B.

2002-01-01

Examines and compares student and faculty attitudes towards students missing classes and class attendance. Surveys undergraduate students (n=231) in lower and upper level psychology courses and psychology faculty. Reports that students found more reasons acceptable for missing classes and that the amount of in-class material on the examinations…

Transportation of Hazardous Evidentiary Material.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Osborn, Douglas.

2005-06-01

This document describes the specimen and transportation containers currently available for use with hazardous and infectious materials. A detailed comparison of advantages, disadvantages, and costs of the different technologies is included. Short- and long-term recommendations are also provided.3 DraftDraftDraftExecutive SummaryThe Federal Bureau of Investigation's Hazardous Materials Response Unit currently has hazardous material transport containers for shipping 1-quart paint cans and small amounts of contaminated forensic evidence, but the containers may not be able to maintain their integrity under accident conditions or for some types of hazardous materials. This report provides guidance and recommendations on the availability of packages for themore » safe and secure transport of evidence consisting of or contaminated with hazardous chemicals or infectious materials. Only non-bulk containers were considered because these are appropriate for transport on small aircraft. This report will addresses packaging and transportation concerns for Hazardous Classes 3, 4, 5, 6, 8, and 9 materials. If the evidence is known or suspected of belonging to one of these Hazardous Classes, it must be packaged in accordance with the provisions of 49 CFR Part 173. The anthrax scare of several years ago, and less well publicized incidents involving unknown and uncharacterized substances, has required that suspicious substances be sent to appropriate analytical laboratories for analysis and characterization. Transportation of potentially hazardous or infectious material to an appropriate analytical laboratory requires transport containers that maintain both the biological and chemical integrity of the substance in question. As a rule, only relatively small quantities will be available for analysis. Appropriate transportation packaging is needed that will maintain the integrity of the substance, will not allow biological alteration, will not react chemically with the substance being shipped, and will otherwise maintain it as nearly as possible in its original condition.The recommendations provided are short-term solutions to the problems of shipping evidence, and have considered only currently commercially available containers. These containers may not be appropriate for all cases. Design, testing, and certification of new transportation containers would be necessary to provide a container appropriate for all cases.Table 1 provides a summary of the recommendations for each class of hazardous material.Table 1: Summary of RecommendationsContainerCost1-quart paint can with ArmlockTM seal ringLabelMaster(r)%242.90 eachHazard Class 3, 4, 5, 8, or 9 Small ContainersTC Hazardous Material Transport ContainerCurrently in Use4 DraftDraftDraftTable 1: Summary of Recommendations (continued)ContainerCost55-gallon open or closed-head steel drumsAll-Pak, Inc.%2458.28 - %2473.62 eachHazard Class 3, 4, 5, 8, or 9 Large Containers95-gallon poly overpack LabelMaster(r)%24194.50 each1-liter glass container with plastic coatingLabelMaster(r)%243.35 - %243.70 eachHazard Class 6 Division 6.1 Poisonous by Inhalation (PIH) Small ContainersTC Hazardous Material Transport ContainerCurrently in Use20 to 55-gallon PIH overpacksLabelMaster(r)%24142.50 - %24170.50 eachHazard Class 6 Division 6.1 Poisonous by Inhalation (PIH) Large Containers65 to 95-gallon poly overpacksLabelMaster(r)%24163.30 - %24194.50 each1-liter transparent containerCurrently in UseHazard Class 6 Division 6.2 Infectious Material Small ContainersInfectious Substance ShipperSource Packaging of NE, Inc.%24336.00 eachNone Commercially AvailableN/AHazard Class 6 Division 6.2 Infectious Material Large ContainersNone Commercially Available N/A5« less

Neo-Marxian social class inequalities in self-rated health among the employed in South Korea: the role of material, behavioral, psychosocial, and workplace environmental factors.

PubMed

Kong, Kyoung Ae; Khang, Young-Ho; Cho, Hong-Jun; Jang, Sung-Mi; Jung-Choi, Kyunghee

2017-04-20

The aim of this study was to examine the pattern of social inequality in self-rated health among the employed using the Wright's social class location indicator, and to assess the roles of material, behavioral, psychosocial, and workplace environmental factors as mediating factors in explaining the social class inequality in self-rated health in South Korea. This study used data from the 4th Korea National Health and Nutrition Examination Survey from 2007 to 2009. Study subjects included the employed population of 4392 men and 3309 women aged 19-64 years. Subjects were classified into twelve social class positions based on the Wright's social class map. The health outcome was self-rated health. Material, psychosocial, behavioral, and workplace environmental factors were considered as potential mediators in explaining social class health inequality. We calculated prevalence ratios of poor self-rated health according to social class, adjusted for age and mediating factors using Poisson regression models. Nonskilled workers and petty bourgeoisie reported worse self-rated health than other social classes among men. The age-adjusted prevalence of petty bourgeoisie and nonskilled workers were about four-fold greater than that of managers. Expert supervisors in the contradictory class location had a greater prevalence of poor self-rated health than experts in men. In women, the prevalence of poor self-rated health was greater in most social classes than their male counterparts, while the differences among social classes within women were not statistically significant. Workplace environmental factors explained the social class inequality by from 24 to 31% in nonskilled and skilled workers and nonskilled supervisors, respectively, and material factors showed an explanatory ability of about 8% for both nonskilled workers and petty bourgeoisie in men. We showed the inequality in self-rated health according to the Wright's social class in an industrialized Asian country. Policy efforts to improve workplace environments in nonskilled and skilled workers and nonskilled supervisors would have a moderate effect on reducing the magnitude of social class inequality in self-rated health. Furthermore, the means to improve power relations in the workplace should be devised to further reduce the social class inequalities in health.

The effects of combined supplementary cementitious materials on physical properties of Kansas concrete pavements.

DOT National Transportation Integrated Search

2013-12-01

This study evaluated the effects of combining varying proportions of slag cement and Class C fly ash : with Type I/II cement in concrete pavement. Three different ternary cementitious material combinations : containing slag cement and Class C fly ash...

49 CFR 176.104 - Loading and unloading Class 1 (explosive) materials.

Code of Federal Regulations, 2012 CFR

2012-10-01

... is formed by use of an open hook may not be used in handling Class 1 (explosive) materials. (e) Only... feet) long, and 10 cm (3.9 inches) thick, and be made of woven hemp, sisal, or similar fiber, or foam...

49 CFR 176.104 - Loading and unloading Class 1 (explosive) materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... is formed by use of an open hook may not be used in handling Class 1 (explosive) materials. (e) Only... feet) long, and 10 cm (3.9 inches) thick, and be made of woven hemp, sisal, or similar fiber, or foam...

49 CFR 176.104 - Loading and unloading Class 1 (explosive) materials.

Code of Federal Regulations, 2013 CFR

2013-10-01

... is formed by use of an open hook may not be used in handling Class 1 (explosive) materials. (e) Only... feet) long, and 10 cm (3.9 inches) thick, and be made of woven hemp, sisal, or similar fiber, or foam...

49 CFR 176.104 - Loading and unloading Class 1 (explosive) materials.

Code of Federal Regulations, 2010 CFR

2010-10-01

... is formed by use of an open hook may not be used in handling Class 1 (explosive) materials. (e) Only... feet) long, and 10 cm (3.9 inches) thick, and be made of woven hemp, sisal, or similar fiber, or foam...

49 CFR 176.104 - Loading and unloading Class 1 (explosive) materials.

Code of Federal Regulations, 2014 CFR

2014-10-01

... is formed by use of an open hook may not be used in handling Class 1 (explosive) materials. (e) Only... feet) long, and 10 cm (3.9 inches) thick, and be made of woven hemp, sisal, or similar fiber, or foam...

Web-Based Interactive Video Vignettes Create a Personalized Active Learning Classroom for Introducing Big Ideas in Introductory Biology

ERIC Educational Resources Information Center

Wright, L. Kate; Newman, Dina L.; Cardinale, Jean A.; Teese, Robert

2016-01-01

The typical "flipped classroom" delivers lecture material in video format to students outside of class in order to make space for active learning in class. But why give students passive material at all? We are developing a set of high-quality online educational materials that promote active, hands-on science learning to aid in teaching…

Coping with Multi-Level Classes Effectively and Creatively.

ERIC Educational Resources Information Center

Strasheim, Lorraine A.

This paper includes a discussion of the problem of multilevel Latin classes, a description of various techniques and perspectives the teacher might use in dealing with these classes, and copies of materials and exercises that have proved useful in multilevel classes. Because the reasons for the existence of such classes are varied, it is suggested…

46 CFR 160.049-3 - Materials.

Code of Federal Regulations, 2014 CFR

2014-10-01

.... Cotton fabrics and coated upholstery cloth meeting the minimum requirements set forth in paragraphs (c... Type I, Class 3 material. (2) Coated upholstery cloth. Coated upholstery cloth shall comply with the..., class I, laminated vinyl-nylon high strength cloth in accordance with the requirements of Specification...

46 CFR 160.049-3 - Materials.

Code of Federal Regulations, 2013 CFR

2013-10-01

.... Cotton fabrics and coated upholstery cloth meeting the minimum requirements set forth in paragraphs (c... Type I, Class 3 material. (2) Coated upholstery cloth. Coated upholstery cloth shall comply with the..., class I, laminated vinyl-nylon high strength cloth in accordance with the requirements of Specification...

46 CFR 160.049-3 - Materials.

Code of Federal Regulations, 2012 CFR

2012-10-01

.... Cotton fabrics and coated upholstery cloth meeting the minimum requirements set forth in paragraphs (c... Type I, Class 3 material. (2) Coated upholstery cloth. Coated upholstery cloth shall comply with the..., class I, laminated vinyl-nylon high strength cloth in accordance with the requirements of Specification...

Residential Construction. Competencies for Articulation.

ERIC Educational Resources Information Center

Southeast Community Coll., Lincoln, NE.

Developed by high school teachers and junior college instructors in cooperation with representatives of business and industry, these materials are designed to help students move from class to class, from secondary to postsecondary education, and from school to employment. The materials consist of student outcomes; competencies for job or advanced…

49 CFR 176.320 - Use of hand flashlights.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Requirements for Class 3 (Flammable) and Combustible Liquid Materials § 176.320 Use of hand flashlights. Each hand flashlight used on deck near or in any hold or compartment containing a Class 3 (flammable) liquid... Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY...

49 CFR 176.320 - Use of hand flashlights.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Requirements for Class 3 (Flammable) and Combustible Liquid Materials § 176.320 Use of hand flashlights. Each hand flashlight used on deck near or in any hold or compartment containing a Class 3 (flammable) liquid... Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY...

49 CFR 176.320 - Use of hand flashlights.

Code of Federal Regulations, 2013 CFR

2013-10-01

... Requirements for Class 3 (Flammable) and Combustible Liquid Materials § 176.320 Use of hand flashlights. Each hand flashlight used on deck near or in any hold or compartment containing a Class 3 (flammable) liquid... Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY...

49 CFR 176.320 - Use of hand flashlights.

Code of Federal Regulations, 2014 CFR

2014-10-01

... Requirements for Class 3 (Flammable) and Combustible Liquid Materials § 176.320 Use of hand flashlights. Each hand flashlight used on deck near or in any hold or compartment containing a Class 3 (flammable) liquid... Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY...

49 CFR 176.320 - Use of hand flashlights.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Requirements for Class 3 (Flammable) and Combustible Liquid Materials § 176.320 Use of hand flashlights. Each hand flashlight used on deck near or in any hold or compartment containing a Class 3 (flammable) liquid... Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY...

Strategies for Improving Non-Fiction Reading Comprehension.

ERIC Educational Resources Information Center

Bell, Karen; Caspari, Amy

This report describes a program for introducing students to strategies for improving their comprehension of non-fiction materials. The targeted population consisted of students of one third grade class in a small, middle class suburb, northwest of a large, midwestern city. Difficulty reading and comprehending non-fiction material was documented…

Replacement Non-Toxic Sealants for Standard Chromated Sealants

DTIC Science & Technology

2005-02-01

material’s mechanical or physical properties and resistance to degradation. As sealant formulations for the Class B-2 worklife were developed by PRC...results ofthis testing, Class B-1I2 and C-12 worklife materials were formulated and are being tested. In addition to the testing that UDRI conducted, two...successfully accomplished in this program. An optimized Class B-2 worklife of the sealant compound designated RW3758-71, Lot no. RT0946, completed

49 CFR 174.715 - Cleanliness of transport vehicles after use.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Cleanliness of transport vehicles after use. 174... RAIL Detailed Requirements for Class 7 (Radioactive) Materials § 174.715 Cleanliness of transport vehicles after use. (a) Each transport vehicle used for transporting Class 7 (radioactive) materials as...

49 CFR 174.715 - Cleanliness of transport vehicles after use.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Cleanliness of transport vehicles after use. 174... RAIL Detailed Requirements for Class 7 (Radioactive) Materials § 174.715 Cleanliness of transport vehicles after use. (a) Each transport vehicle used for transporting Class 7 (radioactive) materials as...

49 CFR 176.176 - Signals.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Signals. 176.176 Section 176.176 Transportation... Class 1 (Explosive) Materials Handling Class 1 (explosive) Materials in Port § 176.176 Signals. When... exhibit the following signals: (a) By day, flag “B” (Bravo) of the international code of signals; and (b...

49 CFR 176.176 - Signals.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Signals. 176.176 Section 176.176 Transportation... Class 1 (Explosive) Materials Handling Class 1 (explosive) Materials in Port § 176.176 Signals. When... exhibit the following signals: (a) By day, flag “B” (Bravo) of the international code of signals; and (b...

49 CFR 177.835 - Class 1 materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... wheel base of less than 184 inches; (3) Any vehicle in the combination is a cargo tank which is required... Army, Navy or Air Force of the United States Government provided the Class 1 (explosive) materials are... boards, or any similar projections. (g) No detonator assembly or booster with detonator may be...

49 CFR 177.835 - Class 1 materials.

Code of Federal Regulations, 2012 CFR

2012-10-01

... wheel base of less than 184 inches; (3) Any vehicle in the combination is a cargo tank which is required... Army, Navy or Air Force of the United States Government provided the Class 1 (explosive) materials are... boards, or any similar projections. (g) No detonator assembly or booster with detonator may be...

49 CFR 177.835 - Class 1 materials.

Code of Federal Regulations, 2010 CFR

2010-10-01

... wheel base of less than 184 inches; (3) Any vehicle in the combination is a cargo tank which is required... Army, Navy or Air Force of the United States Government provided the Class 1 (explosive) materials are... boards, or any similar projections. (g) No detonator assembly or booster with detonator may be...

49 CFR 177.835 - Class 1 materials.

Code of Federal Regulations, 2014 CFR

2014-10-01

... wheel base of less than 184 inches; (3) Any vehicle in the combination is a cargo tank which is required... Army, Navy or Air Force of the United States Government provided the Class 1 (explosive) materials are... boards, or any similar projections. (g) No detonator assembly or booster with detonator may be...

49 CFR 177.835 - Class 1 materials.

Code of Federal Regulations, 2013 CFR

2013-10-01

... wheel base of less than 184 inches; (3) Any vehicle in the combination is a cargo tank which is required... Army, Navy or Air Force of the United States Government provided the Class 1 (explosive) materials are... boards, or any similar projections. (g) No detonator assembly or booster with detonator may be...

49 CFR 176.176 - Signals.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 2 2012-10-01 2012-10-01 false Signals. 176.176 Section 176.176 Transportation... Class 1 (Explosive) Materials Handling Class 1 (explosive) Materials in Port § 176.176 Signals. When... exhibit the following signals: (a) By day, flag “B” (Bravo) of the international code of signals; and (b...

49 CFR 176.176 - Signals.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 2 2013-10-01 2013-10-01 false Signals. 176.176 Section 176.176 Transportation... Class 1 (Explosive) Materials Handling Class 1 (explosive) Materials in Port § 176.176 Signals. When... exhibit the following signals: (a) By day, flag “B” (Bravo) of the international code of signals; and (b...

49 CFR 176.176 - Signals.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 2 2014-10-01 2014-10-01 false Signals. 176.176 Section 176.176 Transportation... Class 1 (Explosive) Materials Handling Class 1 (explosive) Materials in Port § 176.176 Signals. When... exhibit the following signals: (a) By day, flag “B” (Bravo) of the international code of signals; and (b...

Nodal surface semimetals: Theory and material realization

NASA Astrophysics Data System (ADS)

Wu, Weikang; Liu, Ying; Li, Si; Zhong, Chengyong; Yu, Zhi-Ming; Sheng, Xian-Lei; Zhao, Y. X.; Yang, Shengyuan A.

2018-03-01

We theoretically study the three-dimensional topological semimetals with nodal surfaces protected by crystalline symmetries. Different from the well-known nodal-point and nodal-line semimetals, in these materials, the conduction and valence bands cross on closed nodal surfaces in the Brillouin zone. We propose different classes of nodal surfaces, both in the absence and in the presence of spin-orbit coupling (SOC). In the absence of SOC, a class of nodal surfaces can be protected by space-time inversion symmetry and sublattice symmetry and characterized by a Z2 index, while another class of nodal surfaces are guaranteed by a combination of nonsymmorphic twofold screw-rotational symmetry and time-reversal symmetry. We show that the inclusion of SOC will destroy the former class of nodal surfaces but may preserve the latter provided that the inversion symmetry is broken. We further generalize the result to magnetically ordered systems and show that protected nodal surfaces can also exist in magnetic materials without and with SOC, given that certain magnetic group symmetry requirements are satisfied. Several concrete nodal-surface material examples are predicted via the first-principles calculations. The possibility of multi-nodal-surface materials is discussed.

Is Your Accounting Class a Flip or Flop?

ERIC Educational Resources Information Center

Weisenfeld, Leslie

2017-01-01

The flipped class allows the instructor to put materials online that would normally be provided in the traditional lecture format and frees up class time for hands-on learning activities. This paper provides a broad overview of what is required outside of the class via an electronic platform such as Blackboard (Bb) and what is done during class.…

49 CFR 176.182 - Conditions for handling on board ship.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Class 1 (explosive) materials. During electrical storms, cargo operations must be halted and all hatches...) All hatches and cargo ports opening into a compartment in which Class 1 (explosive) materials are stowed must be kept closed except during loading and unloading of the compartment. After loading, hatches...

49 CFR 176.182 - Conditions for handling on board ship.

Code of Federal Regulations, 2013 CFR

2013-10-01

... Class 1 (explosive) materials. During electrical storms, cargo operations must be halted and all hatches...) All hatches and cargo ports opening into a compartment in which Class 1 (explosive) materials are stowed must be kept closed except during loading and unloading of the compartment. After loading, hatches...

49 CFR 176.182 - Conditions for handling on board ship.

Code of Federal Regulations, 2014 CFR

2014-10-01

... Class 1 (explosive) materials. During electrical storms, cargo operations must be halted and all hatches...) All hatches and cargo ports opening into a compartment in which Class 1 (explosive) materials are stowed must be kept closed except during loading and unloading of the compartment. After loading, hatches...

49 CFR 176.182 - Conditions for handling on board ship.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Class 1 (explosive) materials. During electrical storms, cargo operations must be halted and all hatches...) All hatches and cargo ports opening into a compartment in which Class 1 (explosive) materials are stowed must be kept closed except during loading and unloading of the compartment. After loading, hatches...

Making the Invisible More Visible: Home Literacy Practices of Middle-Class and Working-Class Families.

ERIC Educational Resources Information Center

McCarthey, Sarah J.

1997-01-01

Interviews with eight families showed that literacy materials and goals for using literacy differed between middle and working class families, with middle class families drawing on more resources to learn about the child's classroom. However, all families expressed value for literacy activities, challenging the myth that working-class families do…

Focusing Teaching on Students: Examining Student Perceptions of Learning Strategies

ERIC Educational Resources Information Center

Lumpkin, Angela; Achen, Rebecca; Dodd, Regan

2015-01-01

This study examined undergraduate and graduate students' perceptions of the impact of in-class learning activities, out-of-class learning activities, and instructional materials on their learning. Using survey methodology, students anonymously assessed their perceptions of in-class activities, out-of-class activities, and instructional materials…

Prediction of a new class of half-metallic ferromagnets from first principles [A new class of half-metallic ferromagnets from first principles

DOE PAGES

Griffin, Sinead M.; Neaton, Jeffrey B.

2017-09-12

Half-metallic ferromagnetism (HMFM) occurs rarely in materials and yet offers great potential for spintronic devices. Recent experiments suggest a class of compounds with the `ThCrmore » $$_{2}$$Si$$_{2}$$' (122) structure -- isostructural and containing elements common with Fe pnictide-based superconductors -- can exhibit HMFM. Here we use $ab$ $initio$ density-functional theory calculations to understand the onset of half-metallicity in this family of materials and explain the appearance of ferromagnetism at a quantum critical point. We also predict new candidate materials with HMFM and high Curie temperatures through A-site alloying.« less

Jahn-Teller crystals - new class of smart materials

NASA Astrophysics Data System (ADS)

Kaplan, M. D.; Zimmerman, G. O.

2017-05-01

Jahn-Teller crystals represent a promising class in the search for new smart materials. Jahn- Teller multiferroics are of a special interest. We show that the properties of these crystals are not only “of interest for future applications”, but are already used and protected by various patents. Special attention is paid to some new results on magnetic shape memory effects in dielectrics because the physics of the corresponding materials is not yet completely clarified.

49 CFR 176.118 - Electrical requirement.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Electrical requirement. 176.118 Section 176.118... Requirements for Class 1 (Explosive) Materials Stowage § 176.118 Electrical requirement. (a) Electrical... person. (b) Electrical equipment and cables in a cargo space in which Class 1 (explosive) materials are...

49 CFR 176.118 - Electrical requirement.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Electrical requirement. 176.118 Section 176.118... Requirements for Class 1 (Explosive) Materials Stowage § 176.118 Electrical requirement. (a) Electrical... person. (b) Electrical equipment and cables in a cargo space in which Class 1 (explosive) materials are...

49 CFR 176.118 - Electrical requirement.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 2 2012-10-01 2012-10-01 false Electrical requirement. 176.118 Section 176.118... Requirements for Class 1 (Explosive) Materials Stowage § 176.118 Electrical requirement. (a) Electrical... person. (b) Electrical equipment and cables in a cargo space in which Class 1 (explosive) materials are...

49 CFR 176.118 - Electrical requirement.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 2 2014-10-01 2014-10-01 false Electrical requirement. 176.118 Section 176.118... Requirements for Class 1 (Explosive) Materials Stowage § 176.118 Electrical requirement. (a) Electrical... person. (b) Electrical equipment and cables in a cargo space in which Class 1 (explosive) materials are...

49 CFR 176.118 - Electrical requirement.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 2 2013-10-01 2013-10-01 false Electrical requirement. 176.118 Section 176.118... Requirements for Class 1 (Explosive) Materials Stowage § 176.118 Electrical requirement. (a) Electrical... person. (b) Electrical equipment and cables in a cargo space in which Class 1 (explosive) materials are...

Low Cost, Upper Stage-Class Propulsion

NASA Technical Reports Server (NTRS)

Vickers, John

2015-01-01

The low cost, upper stage-class propulsion (LCUSP) element will develop a high strength copper alloy additive manufacturing (AM) process as well as critical components for an upper stage-class propulsion system that will be demonstrated with testing. As manufacturing technologies have matured, it now appears possible to build all the major components and subsystems of an upper stage-class rocket engine for substantially less money and much faster than traditionally done. However, several enabling technologies must be developed before that can happen. This activity will address these technologies and demonstrate the concept by designing, manufacturing, and testing the critical components of a rocket engine. The processes developed and materials' property data will be transitioned to industry upon completion of the activity. Technologies to enable the concept are AM copper alloy process development, AM post-processing finishing to minimize surface roughness, AM material deposition on existing copper alloy substrate, and materials characterization.

The Impact of Video-Based Materials on Chinese-Speaking Learners' English Text Comprehension

ERIC Educational Resources Information Center

Lin, Lu-Fang

2016-01-01

This study investigated whether video-based materials can facilitate second language learners' text comprehension at the levels of macrostructure and microstructure. Three classes inclusive of 98 Chinese-speaking university students joined this study. The three classes were randomly assigned to three treatment groups: on-screen text (T Group),…

The Literacies of Things: Reconfiguring the Material-Discursive Production of Race and Class in an Informal Learning Centre

ERIC Educational Resources Information Center

Thiel, Jaye Johnson; Jones, Stephanie

2017-01-01

Drawing on our documentation of transforming an informal learning centre (the Playhouse) in a multilingual, working-class neighbourhood, this paper presents significant and deliberate material-discursive changes at the Playhouse that produced unpredictable shifts in belongings among young children. More specifically, this paper entwines our…

SEVENTH GRADE MATHEMATICS FOR THE ACADEMICALLY TALENTED, TEACHERS' GUIDE.

ERIC Educational Resources Information Center

HORN, R.A.

MATERIALS FOR BOTH ENRICHED AND ACCELERATED MATHEMATICS COURSES ARE GIVEN. THE PRESENTATION OF THE MATERIALS IS INTENDED FOR EASY ADAPTATION OF MODIFICATION TO MEET THE NEEDS OF MOST MATHEMATICS CLASSES. SUGGESTIONS AND SUPPLEMENTARY REFERENCES IN EACH UNIT ARE OFFERED AS AIDS TO THE MATHEMATICS TEACHER IN REGULAR OR ACCELERATED CLASS. UNITS…

Independent Review of the Defense Logistics Agencys Roles and Missions

DTIC Science & Technology

2014-12-01

remaining wholesale consumables missions of tires, packaged petroleum, oils , and lubricants, and gases and cylinders were transferred from the...housekeeping supplies and equipment. Class III: Petroleum, oils , and lubricants. Class IV: Construction materials. Class V: Ammunition. Class VI...own appropriated funds that are deposited 9 The Construction and Equipment program within DLA Troop Support provides some Class VII non- weapons

49 CFR 173.13 - Exceptions for Class 3, Divisions 4.1, 4.2, 4.3, 5.1, 6.1, and Classes 8 and 9 materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... material must be placed in a tightly closed glass, plastic or metal inner packaging with a maximum capacity... placed in a hermetically sealed barrier bag which is impervious to the lading. (v) The intermediate... hazardous material must be placed in a tightly closed glass, plastic or metal inner packaging. The net...

49 CFR 173.13 - Exceptions for Class 3, Divisions 4.1, 4.2, 4.3, 5.1, 6.1, and Classes 8 and 9 materials.

Code of Federal Regulations, 2013 CFR

2013-10-01

... material must be placed in a tightly closed glass, plastic or metal inner packaging with a maximum capacity... placed in a hermetically sealed barrier bag which is impervious to the lading. (v) The intermediate... hazardous material must be placed in a tightly closed glass, plastic or metal inner packaging. The net...

49 CFR 173.13 - Exceptions for Class 3, Divisions 4.1, 4.2, 4.3, 5.1, 6.1, and Classes 8 and 9 materials.

Code of Federal Regulations, 2014 CFR

2014-10-01

... material must be placed in a tightly closed glass, plastic or metal inner packaging with a maximum capacity... placed in a hermetically sealed barrier bag which is impervious to the lading. (v) The intermediate... hazardous material must be placed in a tightly closed glass, plastic or metal inner packaging. The net...

49 CFR 173.13 - Exceptions for Class 3, Divisions 4.1, 4.2, 4.3, 5.1, 6.1, and Classes 8 and 9 materials.

Code of Federal Regulations, 2012 CFR

2012-10-01

... material must be placed in a tightly closed glass, plastic or metal inner packaging with a maximum capacity... placed in a hermetically sealed barrier bag which is impervious to the lading. (v) The intermediate... hazardous material must be placed in a tightly closed glass, plastic or metal inner packaging. The net...

49 CFR 173.13 - Exceptions for Class 3, Divisions 4.1, 4.2, 4.3, 5.1, 6.1, and Classes 8 and 9 materials.

Code of Federal Regulations, 2010 CFR

2010-10-01

... material must be placed in a tightly closed glass, plastic or metal inner packaging with a maximum capacity... placed in a hermetically sealed barrier bag which is impervious to the lading. (v) The intermediate... hazardous material must be placed in a tightly closed glass, plastic or metal inner packaging. The net...

49 CFR 176.182 - Conditions for handling on board ship.

Code of Federal Regulations, 2010 CFR

2010-10-01

... such person clear of any areas where Class 1 (explosive) materials are being handled. (f) Smoking. (1) Smoking is prohibited on the vessel while Class 1 (explosive) materials are being handled or stowed except in places designated by the master of the vessel. (2) Conspicuous notices prohibiting smoking must be...

Peer Instruction Materials for Light and Spectra

NASA Astrophysics Data System (ADS)

Lee, Kevin M.; Siedell, C. M.; Prather, E. E.

2008-05-01

This poster will describe a new set of materials from the ClassAction project focusing on light and spectra. We will identify the concepts covered in the Light and Spectroscopy Concept Inventory (LSCI) which include the electromagnetic spectrum, Doppler shift, Wien's Law, Stefan-Boltzmann Law, and Kirchhoff's Laws. We will then specifically address how these concepts are targeted by the questions and resources of the ClassAction module. ClassAction is a collection of materials designed to enhance the metacognitive skills of college and high school introductory astronomy students by promoting interactive engagement and providing rapid feedback. The main focus is dynamic peer instruction questions that can be projected in the classroom. Instructors have the capability to recast these questions into alternate permutations based on their own preferences and formative feedback from the class. The questions can be easily selected from a FLASH computer database and are accompanied by outlines, graphics, and simulations which the instructor can utilize to provide feedback. These materials are publicly available at http://astro.unl.edu and are funded by NSF grant #0404988.

49 CFR 177.842 - Class 7 (radioactive) material.

Code of Federal Regulations, 2010 CFR

2010-10-01

... the labels on the individual packages and overpacks in the group. This provision does not apply to... Class 7 (radioactive) material bearing “RADIOACTIVE YELLOW-II” or “RADIOACTIVE YELLOW-III” labels may... transport index number determined by adding together the transport index number on the labels on the...

49 CFR 175.706 - Separation distances for undeveloped film from packages containing Class 7 (radioactive) materials.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 2 2014-10-01 2014-10-01 false Separation distances for undeveloped film from... Classification of Material § 175.706 Separation distances for undeveloped film from packages containing Class 7... film. Transport index Minimum separation distance to nearest undeveloped film for various times in...

49 CFR 175.706 - Separation distances for undeveloped film from packages containing Class 7 (radioactive) materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Separation distances for undeveloped film from... Classification of Material § 175.706 Separation distances for undeveloped film from packages containing Class 7... film. Transport index Minimum separation distance to nearest undeveloped film for various times in...

49 CFR 175.706 - Separation distances for undeveloped film from packages containing Class 7 (radioactive) materials.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 2 2013-10-01 2013-10-01 false Separation distances for undeveloped film from... Classification of Material § 175.706 Separation distances for undeveloped film from packages containing Class 7... film. Transport index Minimum separation distance to nearest undeveloped film for various times in...

49 CFR 175.706 - Separation distances for undeveloped film from packages containing Class 7 (radioactive) materials.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 2 2012-10-01 2012-10-01 false Separation distances for undeveloped film from... Classification of Material § 175.706 Separation distances for undeveloped film from packages containing Class 7... film. Transport index Minimum separation distance to nearest undeveloped film for various times in...

49 CFR 175.706 - Separation distances for undeveloped film from packages containing Class 7 (radioactive) materials.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Separation distances for undeveloped film from... Classification of Material § 175.706 Separation distances for undeveloped film from packages containing Class 7... film. Transport index Minimum separation distance to nearest undeveloped film for various times in...

Film as Source Material in Advanced Foreign Language Classes

ERIC Educational Resources Information Center

Kaiser, Mark; Shibahara, Chika

2014-01-01

This paper suggests new ways filmic texts might be employed in advanced foreign language classes. Typically, film has been seen as source material for broadening students' vocabulary or for developing communicative competence. This paper considers what a close reading of a filmic text might offer foreign language educators and students by…

Effect of a "Look-Ahead" Problem on Undergraduate Engineering Students' Concept Comprehension

ERIC Educational Resources Information Center

Goodman, Kevin; Davis, Julian; McDonald, Thomas

2016-01-01

In an effort to motivate undergraduate engineering students to prepare for class by reviewing material before lectures, a "Look-Ahead" problem was utilized. Students from two undergraduate engineering courses; Statics and Electronic Circuits, were assigned problems from course material that had not yet been covered in class. These…

Dimpled elastic sheets: a new class of non-porous negative Poisson’s ratio materials

NASA Astrophysics Data System (ADS)

Javid, Farhad; Smith-Roberge, Evelyne; Innes, Matthew C.; Shanian, Ali; Weaver, James C.; Bertoldi, Katia

2015-12-01

In this study, we report a novel periodic material with negative Poisson’s ratio (also called auxetic materials) fabricated by denting spherical dimples in an elastic flat sheet. While previously reported auxetic materials are either porous or comprise at least two phases, the material proposed here is non-porous and made of a homogeneous elastic sheet. Importantly, the auxetic behavior is induced by a novel mechanism which exploits the out-of-plane deformation of the spherical dimples. Through a combination of experiments and numerical analyses, we demonstrate the robustness of the proposed concept, paving the way for developing a new class of auxetic materials that significantly expand their design space and possible applications.

Reflectance spectra of 'featureless' materials and the surface mineralogies of M- and E-class asteroids

NASA Technical Reports Server (NTRS)

Cloutis, Edward A.; Smith, Dorian G.; Lambert, Richard St. J.; Gaffey, Michael J.

1990-01-01

In a search for diagnostic spectral parameters which can be used to distinguish different materials on the surface of asteroids and to provide information on the detection limits for mafic silicates, the 0.3- to 2.6-micron reflectance spectra of meteoritic enstatite (nearly pure MgSiO3), iron meteorite metal, magnetite, and amorphous carbon as well as various mixtures of these materials with mafic silicates were examined. Results are presented on the dependence of the spectral detectability of mafic silicates associated with metal, carbon, and magnetite on the particle sizes of the phases, their chemistries, crystal structures, and abundances. It is shown that the observational data for a representative M-class asteroid, (16) Psyche, are largely consistent with a fine-grained metal-rich surface assemblage, whereas data for the E-class asteroid (44) Nysa indicate that its surface is composed of fine-grained material similar to enstatite achondrites, with a small amount of material comparable to the chondritic inclusions found in the Cumberland Falls aubrite.

Faculty and student perceptions of effective study strategies and materials.

PubMed

Suda, Katie J; Bell, Gillian C; Franks, Andrea S

2011-12-15

To evaluate faculty members' and students' perceptions of study strategies and materials. Focus groups were conducted with course directors and first- and second-year students to generate ideas relating to use of course materials, technology, class attendance, and study strategies for mastering class concepts. Students and faculty members differed in their opinions about the utility of textbooks and supplemental resources. The main learning method recommended by students and faculty members was repeated review of course material. Students recommended viewing classroom lectures again online, if possible. Course directors reported believing that class attendance is important, but students based their opinions regarding the importance of attendance on their perceptions of lecture and handout quality. Results did not differ by campus or by student group (first-year vs. second-year students). Students and faculty members have differing opinions on the process that could influence learning and course design. Faculty members should understand the strategies students are using to learn course material and consider additional or alternative course design and delivery techniques based on student feedback.

Flipping Quantitative Classes: A Triple Win

ERIC Educational Resources Information Center

Swart, William; Wuensch, Karl L.

2016-01-01

In the "flipped" class, students use online materials to learn what is traditionally learned by attending lectures, and class time is used for interactive group learning. A required quantitative business class was taught as a flipped classroom in an attempt to improve student satisfaction in the course and reduce the "transactional…

Providing open-access online materials and hands-on sessions for GIS exercises

NASA Astrophysics Data System (ADS)

Oguchi, T.; Yamauchi, H.; Hayakawa, Y. S.

2017-12-01

Researchers of GIS (Geographical Information Systems/Sciences) in Japan have collaborated to provide materials for GIS lecture classes in universities for the last 20 years. The major outcomes include 1) a GIS core curriculum, 2) a GIS "body of knowledge" explaining the details of the curriculum, 3) a series of PowerPoint presentations, and 4) a comprehensive GIS textbook. However, materials for GIS exercises at university classes using GIS software have been limited in Japan. Therefore, we launched a project to provide such materials which will be available online and accessible by anybody. The materials cover broad basic aspects of GIS including geoscientific applications such as terrain analysis using digital elevation models. The materials utilize public-domain and open-source software packages such as QGIS and GRASS. The data used are also freely available ones such as those from the Geospatial Information Authority of Japan. The use of the GitHub platform to distribute the materials allow easier online interactions by both material producers and users. Selected sets of the materials have been utilized for hands-on activities including both official university classes and public instructions. We have been updating the materials based on the opinions of people who took the hands-on courses for better GIS education. The current materials are in Japanese, but we plan to translate some of them into English.

49 CFR 173.120 - Class 3-Definitions.

Code of Federal Regulations, 2014 CFR

2014-10-01

... Materials Other Than Class 1 and Class 7 § 173.120 Class 3—Definitions. (a) Flammable liquid. For the purpose of this subchapter, a flammable liquid (Class 3) means a liquid having a flash point of not more...) and below 93 °C (200 °F). (2) A flammable liquid with a flash point at or above 38 °C (100 °F) that...

49 CFR 173.120 - Class 3-Definitions.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Materials Other Than Class 1 and Class 7 § 173.120 Class 3—Definitions. (a) Flammable liquid. For the purpose of this subchapter, a flammable liquid (Class 3) means a liquid having a flash point of not more...) and below 93 °C (200 °F). (2) A flammable liquid with a flash point at or above 38 °C (100 °F) that...

49 CFR 173.120 - Class 3-Definitions.

Code of Federal Regulations, 2013 CFR

2013-10-01

... Materials Other Than Class 1 and Class 7 § 173.120 Class 3—Definitions. (a) Flammable liquid. For the purpose of this subchapter, a flammable liquid (Class 3) means a liquid having a flash point of not more...) and below 93 °C (200 °F). (2) A flammable liquid with a flash point at or above 38 °C (100 °F) that...

49 CFR 173.120 - Class 3-Definitions.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Materials Other Than Class 1 and Class 7 § 173.120 Class 3—Definitions. (a) Flammable liquid. For the purpose of this subchapter, a flammable liquid (Class 3) means a liquid having a flash point of not more...) and below 93 °C (200 °F). (2) A flammable liquid with a flash point at or above 38 °C (100 °F) that...

Measuring and reducing college students' procrastination.

PubMed

Perrin, Christopher J; Miller, Neal; Haberlin, Alayna T; Ivy, Jonathan W; Meindl, James N; Neef, Nancy A

2011-01-01

We examined college students' procrastination when studying for weekly in-class quizzes. Two schedules of online practice quiz delivery were compared using a multiple baseline design. When online study material was made available noncontingently, students usually procrastinated. When access to additional study material was contingent on completing previous study material, studying was more evenly distributed. Overall, the mean gain in percentage correct scores on weekly in-class quizzes relative to pretests was greater during contingent access than during noncontingent access conditions.

Teaching Materials and Strategies for the AP Music Theory Exam

ERIC Educational Resources Information Center

Lively, Michael T.

2017-01-01

Each year, many students take the Advanced Placement (AP) Music Theory Exam, and the majority of these students enroll in specialized AP music theory classes as part of the preparation process. For the teachers of these AP music theory classes, a number of challenges are presented by the difficulty and complexity of the exam subject material as…

DOE Office of Scientific and Technical Information (OSTI.GOV)

Johnson, D.R.

The purpose of the Heavy Vehicle Propulsion System Materials Program is the development of materials: ceramics, intermetallics, metal alloys, and metal and ceramic coatings, to support the dieselization of class 1-3 trucks to realize a 35% fuel-economy improvement over current gasoline-fueled trucks and to support commercialization of fuel-flexible LE-55 low-emissions, high-efficiency diesel engines for class 7-8 trucks.

The intercrater plains of Mercury and the Moon: Their nature, origin and role in terrestrial planet evolution. Constuction of the paleogeologic maps. Ph.D. Thesis

NASA Technical Reports Server (NTRS)

Leake, M. A.

1982-01-01

The Post Caoris surface was derived from the geologic map by plotting all Class 1 and 2 features. To construct the Caloris surface, Class 3 craters were plotted onto the map, as well as all Class 3 plains. However, if P3 plains were adjacent to P2 units, and appeared continuous with other exposures of P3 material, the P2 unit was assumed to overlie the C3 and P3 material. The younger superposed craters were ignored with respect to the Class 3 surface. The boundaries of P3 materials were then continued under the superposed units, using a minimum of reasonable assumptions. For instance, if P2 and P4 plains were adjacent units, no P3 plains were presumed to lie under the P2 material. Similarly, all C3 craters were considered to have some deposits of impact melt after formation, even if they are mapped containing younger units. C3 craters which were superposed with younger units, C1 or C2 craters, and perhaps P2 plains, were redrawn as if later materials had not been emplaced, i.e., in their post impact, pre-degradation states.

The Impact of Course Length on Online Numeric-Based Course Grades

ERIC Educational Resources Information Center

Mensch, Scott

2013-01-01

When offering online classes, it is necessary to ensure that all course material and objectives will be covered and learners will be successful in the course. This becomes especially important when the same class material and objectives are offered in a three-, five-, and fourteen-week format. This paper outlines the difficulty of delivering…

Using Online Journals and In-Class Note Cards for Reflective and Responsive Teaching and Learning

ERIC Educational Resources Information Center

Slinger-Friedman, Vanessa; Patterson, Lynn M.

2016-01-01

One concern about teaching online or in large, lecturestyle classes is the inability to see students' reactions to course material. These visual cues give instructors feedback on student comprehension, material clarity, and effective delivery modes. Instructors have to see the results of student assignments and exams or end-of-semester evaluations…

WORKING WITH ALKALINE MATERIALS TO ACHIEVE A CLASS B, CLASS A, AND/OR A BIOSOLIDS THAT DOES NOT ATTRACT VECTORS

EPA Science Inventory

This workshop presentation begins with a discussion of the use of lime and other alkaline materials from the very earliest times to the present for killing bacteria, viruses and parasites and for controlling odors in wastewaters and sludge. It answers the question "How did EPA ar...

Special Considerations in Selection of Fabric Film Laminates for Use in Inflatable Structures

NASA Technical Reports Server (NTRS)

Said, Magdi A.

1999-01-01

Inflatable structures are gaining wide support in planetary scientific missions as well as commercial applications. For such applications a new class of fabric/film laminates is being considered for use as a structural gas envelope. The emerging composite materials are a result of recent advances in the manufacturing of lightweight, high strength fibers, fabrics and scrims. The lamination of these load-carrying members with the proper gas barriers results in a wide range of materials suitable for various loading and environmental conditions. Polyester-based woven fabrics laminated to thin homogenous film of polyester are an example of this class. This fabric/film laminate is being considered for the development of a material suitable for building large gas envelopes for use in the NASA ultra long duration balloon program (ULDB). Compared to commercial homogenous films, the material provides relatively high strength to weight ratio as well as better resistance to crack and tear propagation, The mechanical, creep and viscoelastic properties of these fabric film laminates have been studied to form a material model. Preliminary analysis indicates that the material is highly viscoelastic. The mechanical properties of this class of materials will be discussed in some details.

A Quasi Experiment to Determine the Effectiveness of a “Partially Flipped” versus “Fully Flipped” Undergraduate Class in Genetics and Evolution

PubMed Central

Adams, Alison E. M.; Garcia, Jocelyn; Traustadóttir, Tinna

2016-01-01

Two sections of Genetics and Evolution were taught by one instructor. One group (the fully flipped section) had the entire class period devoted to active learning (with background material that had to be watched before class), and the other group (the partially flipped section) had just a portion of class time spent on active learning (with the background material presented during class time). The same materials and assessments were used for both sections. Analysis of objective measures revealed that there was no significant difference between the learning outcomes of students in the two sections. There was no main effect of gender, major, or ethnicity on success in the whole cohort or in either section. There appeared to be a significant main effect of class standing, with freshmen performing significantly less well than sophomores, juniors, or seniors (who all performed equally well) in both sections (p < 0.01); however, this was a very preliminary observation, as there were very few freshmen in either section. The only predictor of success in the two sections was prior grade point average. An anonymous end-of-semester survey showed no significant difference between the two sections in interest in the subject matter. PMID:27174581

Capture Their Attention: Capturing Lessons Using Screen Capture Software

ERIC Educational Resources Information Center

Drumheller, Kristina; Lawler, Gregg

2011-01-01

When students miss classes for university activities such as athletic and academic events, they inevitably miss important class material. Students can get notes from their peers or visit professors to find out what they missed, but when students miss new and challenging material these steps are sometimes not enough. Screen capture and recording…

The Method of Manufacturing Nonmetallic Test-Blocks on Different Sensitivity Classes

NASA Astrophysics Data System (ADS)

Kalinichenko, N. P.; Kalinichenko, A. N.; Lobanova, I. S.; Zaitseva, A. A.; Loboda, E. L.

2016-01-01

Nowadays in our modern world there is a vital question of quality control of details made from nonmetallic materials due to their wide spreading. Nondestructive penetrant testing is effective, and in some cases it is the only possible method of accidents prevention at high- risk sites. A brief review of check sample necessary for quality evaluation of penetrant materials is considered. There was offered a way of making agents for quality of penetrant materials testing according to different liquid penetrant testing sensibility classes.

49 CFR 176.116 - General stowage conditions for Class 1 (explosive) materials.

Code of Federal Regulations, 2013 CFR

2013-10-01

.... Class 1 (explosives) must be stowed as far away as practicable from any potential source of heat or... vertically. In addition to this separation, there must be insulation to Class A60 standard as defined in 46...

49 CFR 176.116 - General stowage conditions for Class 1 (explosive) materials.

Code of Federal Regulations, 2014 CFR

2014-10-01

.... Class 1 (explosives) must be stowed as far away as practicable from any potential source of heat or... vertically. In addition to this separation, there must be insulation to Class A60 standard as defined in 46...

Geochemical Properties of Rocks and Soils in Gusev Crater, Mars: APXS Results from Cumberland Ridge to Home Plate

NASA Technical Reports Server (NTRS)

Ming, D. W.; Gellert, R.; Morris, R. V.; Yen, A. S.; Arvidson, E.; Brueckner, J.; Clark, B. C.; Cohen, B. A.; Fleischer, I.; Klingelhoefer, G.;

Films, Needles, and Particles: A Comparative Study on the Ferroic Properties of Complex Oxides Nano-Structured in One, Two, and Three Dimensions

DTIC Science & Technology

2014-03-01

materials (2). .......................................................2 Figure 2. Theoretical SPE phase region in Temperature vs. Size for PbZr0.6Ti0.4O3...ferroelasticity, ferromagnetism , and ferrotoroidicity (whose existence has not yet been proven by physical observation). A multiferroic material exhibits more... materials all belong to the class of primary ferroics. As such, we can expect analogous behavior in certain physical properties across this class of

Is Active Learning Like Broccoli? Student Perceptions of Active Learning in Large Lecture Classes

ERIC Educational Resources Information Center

Smith, C. Veronica; Cardaciotto, LeeAnn

2011-01-01

Although research suggests that active learning is associated with positive outcomes (e.g., memory, test performance), use of such techniques can be difficult to implement in large lecture-based classes. In the current study, 1,091 students completed out-of-class group exercises to complement course material in an Introductory Psychology class.…

FDM Video Classe: Modes d'emploi pour la classe (FDM Video Class: Classroom Uses).

ERIC Educational Resources Information Center

Beacco, Marcella Di Giura

1996-01-01

Content and design of the videotape series FDM Video Classe, produced by the journal "Le francais dans le monde," are described and classroom uses suggested. The materials are from authentic television programs, selected to illustrate aspects of French culture. It is suggested that the teacher also provide students with supporting…

Use of a Concentration Game for Environmental Chemistry Class Review

ERIC Educational Resources Information Center

Nowosielski, Danica A.

2007-01-01

The concentration game can be used as a complete class or a portion of it to help reinforce the material being presented or for review sessions. An environmental chemistry class review is presented with the use of the concentration game.

Towards sensor array materials: can failure be delayed?

PubMed Central

Mekid, Samir; Saheb, Nouari; Khan, Shafique M A; Qureshi, Khurram K

2015-01-01

Further to prior development in enhancing structural health using smart materials, an innovative class of materials characterized by the ability to feel senses like humans, i.e. ‘nervous materials’, is discussed. Designed at all scales, these materials will enhance personnel and public safety, and secure greater reliability of products. Materials may fail suddenly, but any system wishes that failure is known in good time and delayed until safe conditions are reached. Nervous materials are expected to be the solution to this statement. This new class of materials is based on the novel concept of materials capable of feeling multiple structural and external stimuli, e.g. stress, force, pressure and temperature, while feeding information back to a controller for appropriate real-time action. The strain–stress state is developed in real time with the identified and characterized source of stimulus, with optimized time response to retrieve initial specified conditions, e.g. shape and strength. Sensors are volumetrically embedded and distributed, emulating the human nervous system. Immediate applications are in aircraft, cars, nuclear energy and robotics. Such materials will reduce maintenance costs, detect initial failures and delay them with self-healing. This article reviews the common aspects and challenges surrounding this new class of materials with types of sensors to be embedded seamlessly or inherently, including appropriate embedding manufacturing techniques with modeling and simulation methods. PMID:27877794

Towards sensor array materials: can failure be delayed?

NASA Astrophysics Data System (ADS)

Mekid, Samir; Saheb, Nouari; Khan, Shafique M. A.; Qureshi, Khurram K.

2015-06-01

Further to prior development in enhancing structural health using smart materials, an innovative class of materials characterized by the ability to feel senses like humans, i.e. ‘nervous materials’, is discussed. Designed at all scales, these materials will enhance personnel and public safety, and secure greater reliability of products. Materials may fail suddenly, but any system wishes that failure is known in good time and delayed until safe conditions are reached. Nervous materials are expected to be the solution to this statement. This new class of materials is based on the novel concept of materials capable of feeling multiple structural and external stimuli, e.g. stress, force, pressure and temperature, while feeding information back to a controller for appropriate real-time action. The strain-stress state is developed in real time with the identified and characterized source of stimulus, with optimized time response to retrieve initial specified conditions, e.g. shape and strength. Sensors are volumetrically embedded and distributed, emulating the human nervous system. Immediate applications are in aircraft, cars, nuclear energy and robotics. Such materials will reduce maintenance costs, detect initial failures and delay them with self-healing. This article reviews the common aspects and challenges surrounding this new class of materials with types of sensors to be embedded seamlessly or inherently, including appropriate embedding manufacturing techniques with modeling and simulation methods.

Stochasticity in materials structure, properties, and processing—A review

NASA Astrophysics Data System (ADS)

Hull, Robert; Keblinski, Pawel; Lewis, Dan; Maniatty, Antoinette; Meunier, Vincent; Oberai, Assad A.; Picu, Catalin R.; Samuel, Johnson; Shephard, Mark S.; Tomozawa, Minoru; Vashishth, Deepak; Zhang, Shengbai

2018-03-01

We review the concept of stochasticity—i.e., unpredictable or uncontrolled fluctuations in structure, chemistry, or kinetic processes—in materials. We first define six broad classes of stochasticity: equilibrium (thermodynamic) fluctuations; structural/compositional fluctuations; kinetic fluctuations; frustration and degeneracy; imprecision in measurements; and stochasticity in modeling and simulation. In this review, we focus on the first four classes that are inherent to materials phenomena. We next develop a mathematical framework for describing materials stochasticity and then show how it can be broadly applied to these four materials-related stochastic classes. In subsequent sections, we describe structural and compositional fluctuations at small length scales that modify material properties and behavior at larger length scales; systems with engineered fluctuations, concentrating primarily on composite materials; systems in which stochasticity is developed through nucleation and kinetic phenomena; and configurations in which constraints in a given system prevent it from attaining its ground state and cause it to attain several, equally likely (degenerate) states. We next describe how stochasticity in these processes results in variations in physical properties and how these variations are then accentuated by—or amplify—stochasticity in processing and manufacturing procedures. In summary, the origins of materials stochasticity, the degree to which it can be predicted and/or controlled, and the possibility of using stochastic descriptions of materials structure, properties, and processing as a new degree of freedom in materials design are described.

Application of the Materials-by-Design Methodology to Redesign a New Grade of the High-Strength Low-Alloy Class of Steels with Improved Mechanical Properties and Processability

NASA Astrophysics Data System (ADS)

Grujicic, M.; Snipes, J. S.; Ramaswami, S.

2016-01-01

An alternative to the traditional trial-and-error empirical approach for the development of new materials is the so-called materials-by-design approach. Within the latter approach, a material is treated as a complex system and its design and optimization is carried out by employing computer-aided engineering analyses, predictive tools, and available material databases. In the present work, the materials-by-design approach is utilized to redesign a grade of high-strength low-alloy (HSLA) class of steels with improved mechanical properties (primarily strength and fracture toughness), processability (e.g., castability, hot formability, and weldability), and corrosion resistance. Toward that end, a number of material thermodynamics, kinetics of phase transformations, and physics of deformation and fracture computational models and databases have been developed/assembled and utilized within a multi-disciplinary, two-level material-by-design optimization scheme. To validate the models, their prediction is compared against the experimental results for the related steel HSLA100. Then the optimization procedure is employed to determine the optimal chemical composition and the tempering schedule for a newly designed grade of the HSLA class of steels with enhanced mechanical properties, processability, and corrosion resistance.

Social Class, Solipsism, and Contextualism: How the Rich Are Different from the Poor

ERIC Educational Resources Information Center

Kraus, Michael W.; Piff, Paul K.; Mendoza-Denton, Rodolfo; Rheinschmidt, Michelle L.; Keltner, Dacher

2012-01-01

Social class is shaped by an individual's material resources as well as perceptions of rank vis-a-vis others in society, and in this article, we examine how class influences behavior. Diminished resources and lower rank create contexts that constrain social outcomes for lower-class individuals and enhance contextualist tendencies--that is, a focus…

Development of Pupils' Transfer Skills by Means of Hands On Activities with Artisan Materials in Natural Sciences Classes

ERIC Educational Resources Information Center

Ciascai, Liliana; Chicinas, Luminita

2008-01-01

Hands on activities with artisan materials used in order to realize different practical devices helpful in learning process are one of the most frequently used activity in science classes. Usually, the main strength of these activities are: a deeper learning, an increased motivation of pupils for actively learning and development of practical…

Mathematics Through Science, Part III: An Experimental Approach to Functions. Teacher's Commentary. Revised Edition.

ERIC Educational Resources Information Center

Bolduc, Elroy J., Jr.; And Others

The purpose of this project is to teach learning and understanding of mathematics at the ninth grade level through the use of science experiments. This part of the program contains significant amounts of material normally found in a beginning algebra class. The material should be found useful for classes in general mathematics as a preparation for…

Using Online Lectures to Make Time for Active Learning

PubMed Central

Prunuske, Amy J.; Batzli, Janet; Howell, Evelyn; Miller, Sarah

2012-01-01

To make time in class for group activities devoted to critical thinking, we integrated a series of short online lectures into the homework assignments of a large, introductory biology course at a research university. The majority of students viewed the online lectures before coming to class and reported that the online lectures helped them to complete the in-class activity and did not increase the amount of time they devoted to the course. In addition, students who viewed the online lecture performed better on clicker questions designed to test lower-order cognitive skills. The in-class activities then gave the students practice analyzing the information in groups and provided the instructor with feedback about the students’ understanding of the material. On the basis of the results of this study, we support creating hybrid course models that allow students to learn the fundamental information outside of class time, thereby creating time during the class period to be dedicated toward the conceptual understanding of the material. PMID:22714412

Classification-free threat detection based on material-science-informed clustering

NASA Astrophysics Data System (ADS)

Yuan, Siyang; Wolter, Scott D.; Greenberg, Joel A.

2017-05-01

X-ray diffraction (XRD) is well-known for yielding composition and structural information about a material. However, in some applications (such as threat detection in aviation security), the properties of a material are more relevant to the task than is a detailed material characterization. Furthermore, the requirement that one first identify a material before determining its class may be difficult or even impossible for a sufficiently large pool of potentially present materials. We therefore seek to learn relevant composition-structure-property relationships between materials to enable material-identification-free classification. We use an expert-informed, data-driven approach operating on a library of XRD spectra from a broad array of stream of commerce materials. We investigate unsupervised learning techniques in order to learn about naturally emergent groupings, and apply supervised learning techniques to determine how well XRD features can be used to separate user-specified classes in the presence of different types and degrees of signal degradation.

49 CFR 173.133 - Assignment of packing group and hazard zones for Division 6.1 materials.

Code of Federal Regulations, 2012 CFR

2012-10-01

... atmospheric pressure. Note 2: A liquid in Division 6.1 meeting criteria for Packing Group I, Hazard Zones A or... 49 Transportation 2 2012-10-01 2012-10-01 false Assignment of packing group and hazard zones for... Group Assignments and Exceptions for Hazardous Materials Other Than Class 1 and Class 7 § 173.133...

Ecologia: Spanish Ecology Packet Resource Units and Materials for Intermediate and Advanced Spanish Classes.

ERIC Educational Resources Information Center

Bell, Mozelle Sawyer; Arribas, E. Jaime

This Spanish ecology packet contains resource units and materials for intermediate and advanced Spanish classes. It is designed to be used for individual and small-group instruction in the senior high school to supplement the Spanish language curriculum. Included are articles, pictures, and cartoons from Spanish-language newspapers and magazines…

49 CFR 177.838 - Class 4 (flammable solid) materials, Class 5 (oxidizing) materials, and Division 4.2 (pyroforic...

Code of Federal Regulations, 2010 CFR

2010-10-01

... not be piled closer than 15 cm (5.9 inches) from the top of any motor vehicle with a closed body. (d)-(e) [Reserved] (f) Nitrates, except ammonium nitrate having organic coating, must be loaded in closed... covered. Ammonium nitrate having organic coating must not be loaded in all-metal vehicles, other than...

A Multi-Institution Study on the Effectiveness of ClassAction to Promote Student Understanding in Astro 101

NASA Astrophysics Data System (ADS)

Lee, Kevin M.; French, R. S.; Hands, D. R.; Loranz, D. R.; Martino, D.; Rudolph, A. L.; Wysong, J.; Young, T. S.; Prather, E. E.; CATS

2010-01-01

ClassAction is a computer database of materials designed to enhance the conceptual understanding and reasoning abilities of Astro 101 students by promoting interactive engagement and providing rapid feedback. The main focus is dynamic conceptual questions largely based upon graphics that can be projected in the classroom. Instructors have the capability to select, order, and recast these questions into alternate permutations based on their own preferences and student responses. Instructors may also provide feedback through extensive resources including outlines, graphics, and simulations. The Light and Spectroscopy Concept Inventory (LSCI) is a multiple-choice assessment instrument which focuses on the electromagnetic spectrum, Doppler shift, Wien's Law, Stefan-Boltzmann Law, and Kirchhoff's Laws. Illustrative examples of how these concepts are targeted by the questions and resources of the ClassAction module are shown. ClassAction materials covering light and spectra concepts were utilized in multiple classrooms at 6 different institutions and the LSCI was delivered as a pretest and posttest to measure the gains in student understanding. A comparison of the gains achieved in these classes will be made against the national LSCI data. We will report on our investigation into correlations between gain and the extent of ClassAction usage. ClassAction materials are publicly available at http://astro.unl.edu. We would like to thank the NSF for funding under Grant Nos. 0404988 and 0715517, a CCLI Phase III Grant for the Collaboration of Astronomy Teaching Scholars (CATS) Program.

Using Mobile Phone Technology in EFL Classes

ERIC Educational Resources Information Center

Sad, Süleyman Nihat

2008-01-01

Teachers of English as a foreign language (EFL) who want to develop successful lessons face numerous challenges, including large class sizes and inadequate instructional materials and technological support. Another problem is unmotivated students who refuse to participate in class activities. According to Harmer (2007), uncooperative and…

Facilitating and Bridging Out-of-Class and In-Class Learning: An Interactive E-Book-Based Flipped Learning Approach for Math Courses

ERIC Educational Resources Information Center

Hwang, Gwo-Jen; Lai, Chiu-Lin

2017-01-01

Flipped learning is a well-recognized learning mode that reverses the traditional in-class instruction arrangement by delivering learning content outside of the classroom and engaging students in more activities in class. However, it remains a challenge for students to comprehend the learning material by themselves, particularly when learning…

Mechanical Behavior of Fabric-Film Laminates

NASA Technical Reports Server (NTRS)

Said, Magdi S.

1999-01-01

Inflatable structures are gaining wide support in planetary scientific missions as well as commercial applications. For such applications a new class of materials made of laminating thin homogenous films to lightweight fabrics are being considered us structura1 gas envelops. The emerging composite materials are a result of recent advances in the manufacturing cf 1ightweight, high strength fibers, fabrics and scrims. The lamination of these load-carrying members with the proper gas barrier film results in wide range of materials suitable for various loading and environmental conditions. Polyester - based woven fabrics laminated to thin homogeneus film of polyester (Maylar) is an example of this class. This fabric/ film laminate is being considered for the development a material suitable for building large gas envelopes for use in the NASA Ultra Long Duration Balloon Program (ULDB). Compared to commercial homogeneus films, the material provides relatively high strength to weight ratio as well as better resistance to crack and tear propagation. The purpose of this papers is to introduce the mechanical behavior of this class of multi-layers composite and to highlight some of the concerns observed during the characterization of these laminate composites.

Community education on preterm birth. Does it change practice?

PubMed Central

Sprague, Ann; Stewart, Paula; Niday, Patricia; Nimrod, Carl; Walker, Robin

2002-01-01

OBJECTIVE: To evaluate how well physicians and other prenatal care providers educate women about early recognition of and appropriate response to the signs and symptoms of preterm labour (PTL). To assess use of antenatal steroids for babies born at less than 34 weeks' gestation. DESIGN: Before-after study using a population-based approach. SETTING: Health care providers' offices, hospitals, and prenatal classes in Ottawa, Ont. PARTICIPANTS: Prenatal care providers, women in hospital after giving birth, prenatal class participants. INTERVENTIONS: Prenatal care providers received information and educational materials on PTL and preterm birth (PTB). They passed this information on to pregnant women at their 18- to 20-week prenatal visits. Teachers of prenatal classes gave the same information in early-series classes. Clinical practice guidelines were developed, and hospital staff received education on appropriate response to PTL. MAIN OUTCOME MEASURES: Use of educational materials and steroid treatment. RESULTS: Statistically significant increases were seen in the numbers of care providers who had educational material about PTL and PTB, who reported giving the educational material to all women, and who reported discussing signs and symptoms of PTL and PTB with all women; women who reported that their care providers talked with them about PTL and PTB, and women delivering preterm (< 34 weeks) babies who received steroids. CONCLUSION: Providing knowledge and standardized educational materials to health care providers can help improve preventive practice for PTL and educate women about PTL. PMID:12046368

Community education on preterm birth. Does it change practice?

PubMed

Sprague, Ann; Stewart, Paula; Niday, Patricia; Nimrod, Carl; Walker, Robin

2002-04-01

To evaluate how well physicians and other prenatal care providers educate women about early recognition of and appropriate response to the signs and symptoms of preterm labour (PTL). To assess use of antenatal steroids for babies born at less than 34 weeks' gestation. Before-after study using a population-based approach. Health care providers' offices, hospitals, and prenatal classes in Ottawa, Ont. Prenatal care providers, women in hospital after giving birth, prenatal class participants. Prenatal care providers received information and educational materials on PTL and preterm birth (PTB). They passed this information on to pregnant women at their 18- to 20-week prenatal visits. Teachers of prenatal classes gave the same information in early-series classes. Clinical practice guidelines were developed, and hospital staff received education on appropriate response to PTL. Use of educational materials and steroid treatment. Statistically significant increases were seen in the numbers of care providers who had educational material about PTL and PTB, who reported giving the educational material to all women, and who reported discussing signs and symptoms of PTL and PTB with all women; women who reported that their care providers talked with them about PTL and PTB, and women delivering preterm (< 34 weeks) babies who received steroids. Providing knowledge and standardized educational materials to health care providers can help improve preventive practice for PTL and educate women about PTL.

Investigation of test methods, material properties, and processes for solar cell encapsulants. Encapsulation task of the low-cost silicon solar array project

NASA Technical Reports Server (NTRS)

1977-01-01

During this quarter, flat-plate solar collector systems were considered and six basic construction elements were identified: outer coatings, superstrates, pottants, substrates, undercoats, and adhesives. Materials surveys were then initiated to discover either generic classes or/and specific products to function as each construction element. Cost data included in the surveys permit ready evaluation of each material. Silicones, fluorocarbons, glass, and acrylic polymers have the highest inherent weatherability of materials studied to date. Only acrylics, however, combine low costs, environmental resistance, and potential processability. This class will receive particular emphasis.

Learning Atomic-Molecular Theory in Secondary School: The Role of Meta-Conceptual Awareness and Modelling Skills

NASA Astrophysics Data System (ADS)

Chan, Chi Keung

The aim of this study was to examine the contribution of students' meta-conceptual awareness and modelling skills to their conceptual change when learning atomic-molecular theory. Instructional materials used in the intervention covered three sub-topics: atomic structure, chemical bonding, and structures and properties. Glynn's (1991) Teaching with Analogy model and Chambliss's (2002) guidelines for constructing scientific texts were used as the frameworks for designing and implementing instructional materials for the intervention. Forty-five Secondary 4 chemistry students from two classes at a secondary school in Hong Kong participated in the study. The two classes were taught by the same teacher. The study consisted of two phases. During Phase I, which lasted for 6 weeks, Class A (n = 13) used the above-mentioned instructional materials to learn the three sub-topics, whereas Class B (n = 32) learned the same sub-topics using traditional textbook materials. To further examine the effects of the intervention, a 2-week switching-replication treatment was implemented in Phase II. Class A used traditional textbook materials for revision whereas Class B used the tailor-made instructional materials. A mixed-methods design was used to assess the effectiveness of the intervention. Based on the student misconceptions documented in the literature, a written test of the three sub-topics was developed. The test comprised 33 two-tier multiple-choice items. The test was administered three times: before Phase I (T1), just after Phase I and before Phase II (T2), and 2 weeks after Phase II (T3). Qualitative data were gathered from semi-structured interviews with five students. Three students from Class A and two students from Class B were interviewed individually after Phase I and Phase II, respectively, to assess students' understanding of the essential theoretical concepts and to assess students' modelling skills. The results of paired-samples t-test showed that there was a significant difference between scores at T1 and T2 in both classes, but the difference between scores at T2 and T3 in both classes was insignificant. The results of independent-samples t-test showed that there were no significant differences in scores between Classes A and B at T1, T2 and T3. The results indicate that explicit presentation of misconceptions and scientific concepts, as suggested by Chambliss (2002), was found to be roughly as effective as traditional textbook instruction in terms of students' meta-conceptual awareness. The semi-structured interviews revealed that the modelling skills of the three students from Class A and the two students from Class B had improved after receiving the interventional treatment in Phase I and the switching-replication treatment in Phase II, respectively. They had achieved modelling skills with the general characteristics of level-2 modelling according to Grosslight et al.'s (1991) framework of epistemological views of models and their use in science. They recognised that each model had its own presentation purposes and its own strengths and limitations. They understood that models are not physical copies of reality. In addition, they were aware that a chemical bond is a force rather than a material. They also knew that ionic bonds are present throughout the whole lattice of sodium chloride. These skills enabled the students to avoid forming or retaining some important misconceptions about atomic-molecular theory. They were able to distinguish between microscopic and macroscopic properties. However, some students retained their original misconceptions such as misinterpretation of electron shells as fixed orbits. Possible reasons to account for the results are suggested. The significance and implications of the findings for chemistry education in secondary school are discussed.

The Old Brain, the New Mirror: Matching Teaching and Learning Styles in Foreign Language Class (Based on Neuro-Linguistic Programming).

ERIC Educational Resources Information Center

Knowles, John K.

The process of matching teaching materials and methods to the student's learning style and ability level in foreign language classes is explored. The Neuro-Linguistic Programming (NLP) model offers a diagnostic process for the identification of style. This process can be applied to the language learning setting as a way of presenting material to…

Medical Devices; Immunology and Microbiology Devices; Classification of the Assayed Quality Control Material for Clinical Microbiology Assays. Final order.

PubMed

2017-07-27

The Food and Drug Administration (FDA, Agency, or we) is classifying the assayed quality control material for clinical microbiology assays into class II (special controls). The special controls that will apply to the device are identified in this order and will be part of the codified language for the assayed quality control material for clinical microbiology assays' classification. The Agency is classifying the device into class II (special controls) to provide a reasonable assurance of safety and effectiveness of the device.

49 CFR 173.133 - Assignment of packing group and hazard zones for Division 6.1 materials.

Code of Federal Regulations, 2014 CFR

2014-10-01

... pressure. Note 2: A liquid in Division 6.1 meeting criteria for Packing Group I, Hazard Zones A or B stated... 49 Transportation 2 2014-10-01 2014-10-01 false Assignment of packing group and hazard zones for... Group Assignments and Exceptions for Hazardous Materials Other Than Class 1 and Class 7 § 173.133...

49 CFR 173.133 - Assignment of packing group and hazard zones for Division 6.1 materials.

Code of Federal Regulations, 2013 CFR

2013-10-01

... pressure. Note 2: A liquid in Division 6.1 meeting criteria for Packing Group I, Hazard Zones A or B stated... 49 Transportation 2 2013-10-01 2013-10-01 false Assignment of packing group and hazard zones for... Group Assignments and Exceptions for Hazardous Materials Other Than Class 1 and Class 7 § 173.133...

Perspectives. Teacher's Guide [and] Reflections of History [and] From Cottages to Corporations [and] World War I, The Home Front [and] The Great Depression.

ERIC Educational Resources Information Center

Procter & Gamble Co., Cincinnati, OH.

This publication includes a teacher's guide and four self-contained teaching units of primary source materials for use in secondary U.S. history, government, and sociology classes. Each unit, designed as supplemental material for one or two class periods, contains historical public records and documents from Procter and Gamble's archives and…

Impact analysis of automotive structures with distributed smart material systems

NASA Astrophysics Data System (ADS)

Peelamedu, Saravanan M.; Naganathan, Ganapathy; Buckley, Stephen J.

1999-06-01

New class of automobiles has structural skins that are quite different from their current designs. Particularly, new families of composite skins are developed with new injection molding processes. These skins while support the concept of lighter vehicles of the future, are also susceptible to damage upon impact. It is important that their design should be based on a better understanding on the type of impact loads and the resulting strains and damage. It is possible that these skins can be integrally designed with active materials to counter damages. This paper presents a preliminary analysis of a new class of automotive skins, using piezoceramic as a smart material. The main objective is to consider the complex system with, the skin to be modeled as a layered plate structure involving a lightweight material with foam and active materials imbedded on them. To begin with a cantilever beam structure is subjected to a load through piezoceramic and the resulting strain at the active material site is predicted accounting for the material properties, piezoceramic thickness, adhesive thickness including the effect of adhesives. A finite element analysis is carried out to compare experimental work. Further work in this direction would provide an analytical tool that will provide the basis for algorithms to predict and counter impacts on the future class of automobiles.

An industry perspective on commercial radioactive waste disposal conditions and trends.

PubMed

Romano, Stephen A

2006-11-01

The United States is presently served by Class-A, -B and -C low-level radioactive waste and naturally-occurring and accelerator-produced radioactive material disposal sites in Washington and South Carolina; a Class-A and mixed waste disposal site in Utah that also accepts naturally-occurring radioactive material; and hazardous and solid waste facilities and uranium mill tailings sites that accept certain radioactive materials on a site-specific basis. The Washington site only accepts low-level radioactive waste from 11 western states due to interstate Compact restrictions on waste importation. The South Carolina site will be subject to geographic service area restrictions beginning 1 July 2008, after which only three states will have continued access. The Utah site dominates the commercial Class-A and mixed waste disposal market due to generally lower state fees than apply in South Carolina. To expand existing commercial services, an existing hazardous waste site in western Texas is seeking a Class-A, -B and -C and mixed waste disposal license. With that exception, no new Compact facilities are proposed. This fluid, uncertain situation has inspired national level rulemaking initiatives and policy studies, as well as alternative disposal practices for certain low-activity materials.

49 CFR 385.402 - What definitions are used in this subpart?

Code of Federal Regulations, 2010 CFR

2010-10-01

... temperature materials, materials designated as hazardous in the Hazardous Materials Table (see § 172.101 of this title), and materials that meet the defining criteria for hazard classes and divisions in part 173...

Combinational pixel-by-pixel and object-level classifying, segmenting, and agglomerating in performing quantitative image analysis that distinguishes between healthy non-cancerous and cancerous cell nuclei and delineates nuclear, cytoplasm, and stromal material objects from stained biological tissue materials

DOEpatents

Boucheron, Laura E

2013-07-16

Quantitative object and spatial arrangement-level analysis of tissue are detailed using expert (pathologist) input to guide the classification process. A two-step method is disclosed for imaging tissue, by classifying one or more biological materials, e.g. nuclei, cytoplasm, and stroma, in the tissue into one or more identified classes on a pixel-by-pixel basis, and segmenting the identified classes to agglomerate one or more sets of identified pixels into segmented regions. Typically, the one or more biological materials comprises nuclear material, cytoplasm material, and stromal material. The method further allows a user to markup the image subsequent to the classification to re-classify said materials. The markup is performed via a graphic user interface to edit designated regions in the image.

Teaching Multilevel Adult ESL Classes. ERIC Digest.

ERIC Educational Resources Information Center

Shank, Cathy C.; Terrill, Lynda R.

Teachers in multilevel adult English-as-a-Second-Language classes are challenged to use a variety of materials, activities, and techniques to engage the interest of the learners and assist them in their educational goals. This digest recommends ways to choose and organize content for multilevel classes, explains grouping strategies, discusses a…

[Does elitism of school influence the smoking-related health behaviour among grammar school students?].

PubMed

Józwicki, Wojciech; Gołda, Ryszard; Domaniewska, Jolanta; Skok, Zdzisław; Jarzemski, Piotr; Przybylski, Grzegorz; Domaniewski, Jan

2009-01-01

The aim of the study was connected with smoking health behaviour estimation among public (SZP) and nonpublic (SZN) grammar school students. The analysis of 156 anonymous questionnaires was made. Questionnaires contained questions of parents' education, material situation of family, physical education, social relations with family and peers and positive or negative perception of smoking. In total trial we observed a strong positive correlation between style of smoking or number of smoked cigarettes and positive perception of smoking (r = 0.62 or r = 0.36 respectively). The latter correlated significantly with family presence of smoking (r = 0.18). Percentages of smoking students of SZP and SZN differed and amounted 22% and 18% respectively. Within I/II SZP classes the smoking depended on material position of family (r = 0.28) and positive perception of smoking (r = 0.68). Among students of III SZP classes the dependence on material situation was stronger (r = 0.49), while students of III SZN classes became to perceive smoking more positive (r = 0.82). Social relations of students of I/II SZN classes were inversely proportional to prevalence of smoking in their families. Smoking students of III SZN classes worked out much more variously in comparison with pupils of SZP. The main motivation of smoking within school students was the positive perception of smoking. The differences of smoking prevalence within both types of school probably formed in the families and observed in I/II classes pupils, vanished during the time of III class of studying. Elitism of school do not protect the student from smoking: during the time of III SZN class the smoking receives clearly positive appearance and became established. Probably existing antinicotinic school programs should much more decidedly deliver the negative appearance of health effects of smoking.

Hydrodynamic models for novae with ejecta rich in oxygen, neon and magnesium

NASA Technical Reports Server (NTRS)

Starrfield, S.; Sparks, W. M.; Truran, J. W.

1985-01-01

The characteristics of a new class of novae are identified and explained. This class consists of those objects that have been observed to eject material rich in oxygen, neon, magnesium, and aluminum at high velocities. We propose that for this class of novae the outburst is occurring not on a carbon-oxygen white dwarf but on an oxygen-neon-magnesium white dwarf which has evolved from a star which had a main sequence mass of approx. 8 solar masses to approx. 12 solar masses. An outburst was simulated by evolving 1.25 solar mass white dwarfs accreting hydrogen rich material at various rates. The effective enrichment of the envelope by ONeMg material from the core is simulated by enhancing oxygen in the accreted layers. The resulting evolutionary sequences can eject the entire accreted envelope plus core material at high velocities. They can also become super-Eddington at maximum bolometric luminosity. The expected frequency of such events (approx. 1/4) is in good agreement with the observed numbers of these novae.

Remote Sensing Tertiary Education Meets High Intensity Interval Training

NASA Astrophysics Data System (ADS)

Joyce, K. E.; White, B.

2015-04-01

Enduring a traditional lecture is the tertiary education equivalent of a long, slow, jog. There are certainly some educational benefits if the student is able to maintain concentration, but they are just as likely to get caught napping and fall off the back end of the treadmill. Alternatively, a pre-choreographed interactive workshop style class requires students to continually engage with the materials. Appropriately timed breaks or intervals allow students to recover briefly before being increasingly challenged throughout the class. Using an introductory remote sensing class at Charles Darwin University, this case study presents a transition from the traditional stand and deliver style lecture to an active student-led learning experience. The class is taught at undergraduate and postgraduate levels, with both on-campus as well as online distance learning students. Based on the concept that active engagement in learning materials promotes 'stickiness' of subject matter, the remote sensing class was re-designed to encourage an active style of learning. Critically, class content was reviewed to identify the key learning outcomes for the students. This resulted in a necessary sacrifice of topic range for depth of understanding. Graduates of the class reported high levels of enthusiasm for the materials, and the style in which the class was taught. This paper details a number of techniques that were used to engage students in active and problem based learning throughout the semester. It suggests a number of freely available tools that academics in remote sensing and related fields can readily incorporate into their teaching portfolios. Moreover, it shows how simple it can be to provide a far more enjoyable and effective learning experience for students than the one dimensional lecture.

49 CFR 172.101 - Purpose and use of hazardous materials table.

Code of Federal Regulations, 2010 CFR

2010-10-01

... paragraph (c)(11): For the transportation of samples of self-reactive materials, organic peroxides... hazard class, the material is not a hazardous material. (13) Self-reactive materials and organic peroxides. A generic proper shipping name for a self-reactive material or an organic peroxide, as listed in...

Consumer Behavior Classroom Exercises that Really Work.

ERIC Educational Resources Information Center

Kimmel, Allan J.

1999-01-01

Describes five in-class exercises for use in consumer behavior classes that encourage student involvement in group and class discussions, promote student interest in course material, and stimulate critical thinking. Explains that the exercises can be adapted for other related courses and are equally successful with students of varying abilities.…

49 CFR 179.200 - General specifications applicable to non-pressure tank car tanks (Class DOT-111).

Code of Federal Regulations, 2013 CFR

2013-10-01

... tank car tanks (Class DOT-111). 179.200 Section 179.200 Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW...

49 CFR 179.103 - Special requirements for class 114A * * * tank car tanks.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 3 2014-10-01 2014-10-01 false Special requirements for class 114A * * * tank car...) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specifications for Pressure Tank Car Tanks (Classes DOT-105, 109, 112, 114 and 120...

49 CFR 179.200 - General specifications applicable to non-pressure tank car tanks (Class DOT-111).

Code of Federal Regulations, 2014 CFR

2014-10-01

... tank car tanks (Class DOT-111). 179.200 Section 179.200 Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW...

Using an Exemplification Exercise to Teach Psychological Disorders

ERIC Educational Resources Information Center

Balch, William R.

2009-01-01

At the beginning of the semester, 2 introductory psychology classes took 1 pretest requiring them to match 12 psychological disorders with the correct definitions and another requiring them to match the disorders with appropriate examples. Twelve weeks later, both classes heard lecture material on the disorders. One class also performed an…

Locating potential biosignatures on Europa from surface geology observations.

PubMed

Figueredo, Patricio H; Greeley, Ronald; Neuer, Susanne; Irwin, Louis; Schulze-Makuch, Dirk

2003-01-01

We evaluated the astrobiological potential of the major classes of geologic units on Europa with respect to possible biosignatures preservation on the basis of surface geology observations. These observations are independent of any formational model and therefore provide an objective, though preliminary, evaluation. The assessment criteria include high mobility of material, surface concentration of non-ice components, relative youth, textural roughness, and environmental stability. Our review determined that, as feature classes, low-albedo smooth plains, smooth bands, and chaos hold the highest potential, primarily because of their relative young age, the emplacement of low-viscosity material, and indications of material exchange with the subsurface. Some lineaments and impact craters may be promising sites for closer study despite the comparatively lower astrobiological potential of their classes. This assessment will be expanded by multidisciplinary examination of the potential for habitability of specific features.

Effects of elevated temperatures on different restorative materials: An aid to forensic identification processes

PubMed Central

Pol, Chetan A.; Ghige, Suvarna K.; Gosavi, Suchitra R.; Hazarey, Vinay K.

2015-01-01

Background: Heat-induced alterations to dental and restorative materials can be of great interest to forensic dentistry. Knowing the specific optical behavior of dental materials can be of high importance as recognition of changes induced by high temperatures can lead to the determination of material which was used in a dental restoration, facilitating identification of burned human remains. Aim: To observe the effects of predetermined temperatures (200°C–400°C–600°C–800°C–1000°C) on unrestored teeth and different restorative materials macroscopically and then examine them under a stereomicroscope for the purpose of identification. Materials and Methods: The study was conducted on 375 extracted teeth which were divided into five groups of 75 teeth each as follows: group 1- unrestored teeth, group 2- teeth restored with all-ceramic crowns, Group 3- with class I silver amalgam filling, group 4- with class I composite restoration, and group 5- with class I glass ionomer cement restoration. Results: Unrestored and restored teeth display a series of specific macroscopic & stereomicroscopic structural changes for each range of temperature. Conclusion: Dental tissues and restorative materials undergo a series of changes which correlate well with the various temperatures to which they were exposed. These changes are a consequence of the nature of the materials and their physicochemical characteristics. PMID:26005305

Summer foods of American widgeon, mallards, and a green-winged teal near Great Slave Lake, N.W.T

USGS Publications Warehouse

Bartonek, J.C.

1972-01-01

Foods found in three species of dabbling ducks collected during summer from bog ponds, and sedge pools in taiga on the north side of Great Slave Lake, Northwest Territories, are described. Animal material in the esophageal contents of 10 adult American Widgeons (Mareca americana) averaged 31 i?? 34 per cent (P<0.05) by volume. A significantly higher percentage of animal material was found in Class I and II widgeon ducklings (66 i?? 22 per cent) than in Class IIIa ducklings and flying juveniles (12 i?? 20 per cent) of this species. Animal material comprised 87 i?? 35 per cent of esophageal contents from five Class II and flying juvenile Mallards (Anas platyrhynchos) and 100 per cent of that from an adult female Green-winged Teal (A. carolinensis).

49 CFR 173.459 - Mixing of fissile material packages with non-fissile or fissile-excepted material packages.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 2 2012-10-01 2012-10-01 false Mixing of fissile material packages with non... (Radioactive) Materials § 173.459 Mixing of fissile material packages with non-fissile or fissile-excepted material packages. Mixing of fissile material packages with other types of Class 7 (radioactive) materials...

49 CFR 173.459 - Mixing of fissile material packages with non-fissile or fissile-excepted material packages.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 2 2013-10-01 2013-10-01 false Mixing of fissile material packages with non... (Radioactive) Materials § 173.459 Mixing of fissile material packages with non-fissile or fissile-excepted material packages. Mixing of fissile material packages with other types of Class 7 (radioactive) materials...

49 CFR 173.459 - Mixing of fissile material packages with non-fissile or fissile-excepted material packages.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Mixing of fissile material packages with non... (Radioactive) Materials § 173.459 Mixing of fissile material packages with non-fissile or fissile-excepted material packages. Mixing of fissile material packages with other types of Class 7 (radioactive) materials...

49 CFR 173.459 - Mixing of fissile material packages with non-fissile or fissile-excepted material packages.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Mixing of fissile material packages with non... (Radioactive) Materials § 173.459 Mixing of fissile material packages with non-fissile or fissile-excepted material packages. Mixing of fissile material packages with other types of Class 7 (radioactive) materials...

49 CFR 173.459 - Mixing of fissile material packages with non-fissile or fissile-excepted material packages.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 2 2014-10-01 2014-10-01 false Mixing of fissile material packages with non... (Radioactive) Materials § 173.459 Mixing of fissile material packages with non-fissile or fissile-excepted material packages. Mixing of fissile material packages with other types of Class 7 (radioactive) materials...

49 CFR 173.150 - Exceptions for Class 3 (flammable and combustible liquids).

Code of Federal Regulations, 2012 CFR

2012-10-01

... Class 3 (flammable and combustible liquids). (a) General. Exceptions for hazardous materials shipments... flammable liquids (Class 3) and combustible liquids are excepted from labeling requirements, unless the... aircraft, the following combination packagings are authorized: (1) For flammable liquids in Packing Group I...

Evaluation of nonmetallic thermal protection materials for the manned space shuttle. Volume 1, task 1: Assessment of technical risks associated with utilization of nonmetallic thermal protection system

NASA Technical Reports Server (NTRS)

Wilkinson, W. H.; Kirkhart, F. P.; Kistler, C. W.; Duckworth, W. H.; Ungar, E. W.; Foster, E. L.

1970-01-01

Technical problems of design and flight qualification of the proposed classes of surface insulation materials and leading edge materials were reviewed. A screening test plan, a preliminary design data test plan and a design data test plan were outlined. This program defined the apparent critical differences between the surface insulators and the leading edge materials, structuring specialized screening test plans for each of these two classes of materials. Unique testing techniques were shown to be important in evaluating the structural interaction aspects of the surface insulators and a separate task was defined to validate the test plan. In addition, a compilation was made of available information on proposed material (including metallic TPS), previous shuttle programs, pertinent test procedures, and other national programs of merit. This material was collected and summarized in an informally structured workbook.

Comparison of Cramer classification between Toxtree, the OECD QSAR Toolbox and expert judgment.

PubMed

Bhatia, Sneha; Schultz, Terry; Roberts, David; Shen, Jie; Kromidas, Lambros; Marie Api, Anne

2015-02-01

The Threshold of Toxicological Concern (TTC) is a pragmatic approach in risk assessment. In the absence of data, it sets up levels of human exposure that are considered to have no appreciable risk to human health. The Cramer decision tree is used extensively to determine these exposure thresholds by categorizing non-carcinogenic chemicals into three different structural classes. Therefore, assigning an accurate Cramer class to a material is a crucial step to preserve the integrity of the risk assessment. In this study the Cramer class of over 1000 fragrance materials across diverse chemical classes were determined by using Toxtree (TT), the OECD QSAR Toolbox (TB), and expert judgment. Disconcordance was observed between TT and the TB. A total of 165 materials (16%) showed different results from the two programs. The overall concordance for Cramer classification between TT and expert judgment is 83%, while the concordance between the TB and expert judgment is 77%. Amines, lactones and heterocycles have the lowest percent agreement with expert judgment for TT and the TB. For amines, the expert judgment agreement is 45% for TT and 55% for the TB. For heterocycles, the expert judgment agreement is 55% for TT and the TB. For lactones, the expert judgment agreement is 56% for TT and 50% for the TB. Additional analyses were conducted to determine the concordance within various chemical classes. Critical checkpoints in the decision tree are identified. Strategies and guidance on determining the Cramer class for various chemical classes are discussed. Copyright © 2014 Elsevier Inc. All rights reserved.

Hazardous Material Packaging and Transportation

DOE Office of Scientific and Technical Information (OSTI.GOV)

Hypes, Philip A.

2016-02-04

This is a student training course. Some course objectives are to: recognize and use standard international and US customary units to describe activities and exposure rates associated with radioactive material; determine whether a quantity of a single radionuclide meets the definition of a class 7 (radioactive) material; determine, for a given single radionuclide, the shipping quantity activity limits per 49 Code of Federal Regulations (CFR) 173.435; determine the appropriate radioactive material hazard class proper shipping name for a given material; determine when a single radionuclide meets the DOT definition of a hazardous substance; determine the appropriate packaging required for amore » given radioactive material; identify the markings to be placed on a package of radioactive material; determine the label(s) to apply to a given radioactive material package; identify the entry requirements for radioactive material labels; determine the proper placement for radioactive material label(s); identify the shipping paper entry requirements for radioactive material; select the appropriate placards for a given radioactive material shipment or vehicle load; and identify allowable transport limits and unacceptable transport conditions for radioactive material.« less

Class Dismissed? Historical Materialism and the Politics of "Difference"

ERIC Educational Resources Information Center

Scatamburlo-D'Annibale, Valerie; McLaren, Peter

2004-01-01

Perhaps one of the most taken-for-granted features of contemporary social theory is the ritual and increasingly generic critique of Marxism in terms of its alleged failure to address forms of oppression other than that of "class." Marxism is considered to be theoretically bankrupt and intellectually passe, and class analysis is often savagely…

The Polyanilines: A Novel Class of Conducting Polymers

DTIC Science & Technology

1992-06-19

yield pos~ive and negative solitons. Other conducting polymers are briefly discussed. The polyanilines , a large class of versatile conducting polymers...Speia TEC-9NTlCAL REPORT NO.: 1992-35 - "THE POLYANILINES : A NOVEL CLASS OF CONDUCTING POLYMERS" by A.G. MacDiarmid Accepted for Publication in...34The Polyanilines : A Novel Class of Conducting Polymers," Proceed. Nobel Symposium 81, in Cpniuaated Polymers and Related Materials: The Interconnection

Thoughts on the Role of Government in the Development of World-Class Universities in China

ERIC Educational Resources Information Center

Guangcai, Yan

2011-01-01

Looking at the rise of world-class universities through history, creating an institutional environment in which universities are relatively autonomous, while also ensuring effective material support from the government is essential for the formation of world-class universities. It is worth examining the deteriorating academic environment in China…

A Quasi Experiment to Determine the Effectiveness of a "Partially Flipped" versus "Fully Flipped" Undergraduate Class in Genetics and Evolution

ERIC Educational Resources Information Center

Adams, Alison E. M.; Garcia, Jocelyn; Traustadóttir, Tinna

2016-01-01

Two sections of Genetics and Evolution were taught by one instructor. One group (the fully flipped section) had the entire class period devoted to active learning (with background material that had to be watched before class), and the other group (the partially flipped section) had just a portion of class time spent on active learning (with the…

Materials Related Forensic Analysis and Special Testing : Drying Shrinkage Evaluation of Bridge Decks with Class AAA and Class W/WD Type K Cement

DOT National Transportation Integrated Search

2001-07-01

This work pertains to preparation of concrete drying shrinkage data for proposed concrete mixtures during normal concrete : trial batch verification. Selected concrete mixtures will include PennDOT Classes AAA and AA and will also include the use of ...

Class, Gender, and School Expansion in France: A Four-Systems Comparison.

ERIC Educational Resources Information Center

Garnier, Maurice A.; Hage, Jerald

1991-01-01

Discusses a study of the effects of material incentives and institutionalized values upon the expansion of secondary school systems in France. Reports that class was more important than gender in determining expansion because state policies placed greater emphasis on emphasized class in determining supply. Concludes that state policy reinforced…

Development of Experience-based Visible-type Electromagnetic Teaching Materials

NASA Astrophysics Data System (ADS)

Suzuki, Masayoshi; Shima, Kenzou

Electromagnetism is the base of electrical engineering, however, it is one of the most difficult subjects to learn. The small experiments which show the principles of electricity visibly are useful technique to promote these comprehension. For classroom experimental materials to learn basic electromagnetism, we developed rotating magnetic field visualizer, gravity-use generators, simple motors, and electric-field visualizer. We report how we visualized the principles of motors and generators in classroom experiments. In particular, we discuss in detail how to visualize the mechanism of very simple motors. We have been demonstrating the motors in children science classes conducted all over Japan. We developed these experimental materials, and we achieved remarkable results using these materials in the electromagnetism class.

Theoretical design and discovery of the most-promising, previously overlooked hybrid perovskite compounds

DOE Office of Scientific and Technical Information (OSTI.GOV)

Zunger, Alex; Kazmerski, Lawrence L.; Dalpian, Gustavo M.

The material class of hybrid organic-inorganic perovskites (AMX3) has risen rapidly from a virtually unknown material in photovoltaic applications a short 8-years ago into 20-23% efficient thin-film solar cell devices. As promising as this class of materials is, however, there are limitations associated with its poor long-term stability, non-optimal band gap, and the presence of toxic Pb atom on the metalloid site. An Edisonian laboratory exploration (i.e., growth + characterization) via trial-and-error processes of all other candidate materials, is unpractical. Our approach uses high speed computational design and discovery to screen the ‘best of class” candidates based upon optimal functionalities.

Projects Using a Computer Algebra System in First-Year Undergraduate Mathematics

ERIC Educational Resources Information Center

Rosenzweig, Martin

2007-01-01

This paper illustrates the use of computer-based projects in two one-semester first-year undergraduate mathematics classes. Developed over a period of years, the approach is one in which the classes are organised into work-groups, with computer-based projects being undertaken periodically to illustrate the class material. These projects are…

Cross-Linguistic Activation in Bilingual Sentence Processing: The Role of Word Class Meaning

ERIC Educational Resources Information Center

Baten, Kristof; Hofman, Fabrice; Loeys, Tom

2011-01-01

This study investigates how categorial (word class) semantics influences cross-linguistic interactions when reading in L2. Previous homograph studies paid little attention to the possible influence of different word classes in the stimulus material on cross-linguistic activation. The present study examines the word recognition performance of…

49 CFR 179.201-4 - Material.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS SPECIFICATIONS FOR TANK CARS Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW and 115AW) § 179.201-4 Material. All fittings...

Lecture-Capture Software and the Teaching of Soils

NASA Astrophysics Data System (ADS)

Brevik, Eric C.

2014-05-01

Several companies now offer software that can record academic lectures and place them on password-protected course websites for future review by students. Using lecture-capture software offers several advantages for the instructor and the students, including: 1) The ability for students who miss class for legitimate reasons (e.g., participation in school-sanctioned extra-curricular activities, illness or family emergencies) to get lecture materials by logging into the class website. This provides these students with a more complete exposure to the material than simply copying a classmate's notes. 2) The instructor is able to direct students who miss class for legitimate reasons to the recorded lecture rather than needing to spend time going over the material with those students and that recap does not end up being rushed. 3) The ability to address course conflicts for graduating seniors by allowing them to take the lecture portion of the class via recorded lecture. 4) Students who desire more in-depth learning are able to go back to selected portions of previous lectures to review and reconsider a topic of discussion or to fill in vague sections of their notes. There are also potential disadvantages to the use of lecture-capture software, including: 1) decreased student attendance in class because they feel they can watch class later at a time of their own choosing, 2) additional time spent by the instructor dealing with the technology, and 3) problems with hardware or software during class time that prevents recording a given day's lecture. These problems can often be addressed or justified relatively easily. If problem 1 is of concern to an instructor it can be addressed by blocking online access to individual students who have a poor record of class attendance. In the case of problem 2, the extra time spent with the technology is often offset by a reduction in time answering questions from students who have missed class. Problem 3 does happen, but in the author's experience it is fairly rare, representing less than 5% of class sessions per semester. Student comments have been overwhelmingly favorable towards the use of captured lectures since the technology was first adopted in the author's classes in 2009.

Techniques and Technology to Revise Content Delivery and Model Critical Thinking in the Neuroscience Classroom

PubMed Central

Illig, Kurt R.

2015-01-01

Undergraduate neuroscience courses typically involve highly interdisciplinary material, and it is often necessary to use class time to review how principles of chemistry, math and biology apply to neuroscience. Lecturing and Socratic discussion can work well to deliver information to students, but these techniques can lead students to feel more like spectators than participants in a class, and do not actively engage students in the critical analysis and application of experimental evidence. If one goal of undergraduate neuroscience education is to foster critical thinking skills, then the classroom should be a place where students and instructors can work together to develop them. Students learn how to think critically by directly engaging with course material, and by discussing evidence with their peers, but taking classroom time for these activities requires that an instructor find a way to provide course materials outside of class. Using technology as an on-demand provider of course materials can give instructors the freedom to restructure classroom time, allowing students to work together in small groups and to have discussions that foster critical thinking, and allowing the instructor to model these skills. In this paper, I provide a rationale for reducing the use of traditional lectures in favor of more student-centered activities, I present several methods that can be used to deliver course materials outside of class and discuss their use, and I provide a few examples of how these techniques and technologies can help improve learning outcomes. PMID:26240525

Techniques and Technology to Revise Content Delivery and Model Critical Thinking in the Neuroscience Classroom.

PubMed

Illig, Kurt R

2015-01-01

Undergraduate neuroscience courses typically involve highly interdisciplinary material, and it is often necessary to use class time to review how principles of chemistry, math and biology apply to neuroscience. Lecturing and Socratic discussion can work well to deliver information to students, but these techniques can lead students to feel more like spectators than participants in a class, and do not actively engage students in the critical analysis and application of experimental evidence. If one goal of undergraduate neuroscience education is to foster critical thinking skills, then the classroom should be a place where students and instructors can work together to develop them. Students learn how to think critically by directly engaging with course material, and by discussing evidence with their peers, but taking classroom time for these activities requires that an instructor find a way to provide course materials outside of class. Using technology as an on-demand provider of course materials can give instructors the freedom to restructure classroom time, allowing students to work together in small groups and to have discussions that foster critical thinking, and allowing the instructor to model these skills. In this paper, I provide a rationale for reducing the use of traditional lectures in favor of more student-centered activities, I present several methods that can be used to deliver course materials outside of class and discuss their use, and I provide a few examples of how these techniques and technologies can help improve learning outcomes.

Big Class Size Challenges: Teaching Reading in Primary Classes in Kampala, Uganda's Central Municipality

ERIC Educational Resources Information Center

Kewaza, Samuel; Welch, Myrtle I.

2013-01-01

Research on reading has established that reading is a pivotal discipline and early literacy development dictates later reading success. Therefore, the purpose of this study is to investigate challenges encountered with reading pedagogy, teaching materials, and teachers' attitudes towards teaching reading in crowded primary classes in Kampala,…

Using the Community as a Classroom for Large Introductory Sociology Classes.

ERIC Educational Resources Information Center

Corwin, Patricia

1996-01-01

Explores how a student service program can be implemented without a large staff and without cost, in large introductory sociology classes as part of an extra-credit project, while augmenting course material as an active learning component. Discusses a class that fits this description at North Dakota State University. (MJP)

PLANS; a finite element program for nonlinear analysis of structures. Volume 2: User's manual

NASA Technical Reports Server (NTRS)

Pifko, A.; Armen, H., Jr.; Levy, A.; Levine, H.

1977-01-01

The PLANS system, rather than being one comprehensive computer program, is a collection of finite element programs used for the nonlinear analysis of structures. This collection of programs evolved and is based on the organizational philosophy in which classes of analyses are treated individually based on the physical problem class to be analyzed. Each of the independent finite element computer programs of PLANS, with an associated element library, can be individually loaded and used to solve the problem class of interest. A number of programs have been developed for material nonlinear behavior alone and for combined geometric and material nonlinear behavior. The usage, capabilities, and element libraries of the current programs include: (1) plastic analysis of built-up structures where bending and membrane effects are significant, (2) three dimensional elastic-plastic analysis, (3) plastic analysis of bodies of revolution, and (4) material and geometric nonlinear analysis of built-up structures.

75 FR 53593 - Hazardous Materials: Minor Editorial Corrections and Clarifications

Federal Register 2010, 2011, 2012, 2013, 2014

2010-09-01

... transportation, Packaging and containers, Radioactive materials, Reporting and recordkeeping requirements... section specifies general requirements for packaging hazardous materials for transportation by aircraft... contamination on motor vehicles used to transport Class 7 radioactive materials under exclusive use conditions...

49 CFR 173.4 - Small quantities for highway and rail.

Code of Federal Regulations, 2010 CFR

2010-10-01

... hazard classes, are not subject to any other requirements of this subchapter when— (1) The maximum... a package containing a Class 7 (radioactive) material. (2) With the exception of temperature sensing...

Physics education through computational tools: the case of geometrical and physical optics

NASA Astrophysics Data System (ADS)

Rodríguez, Y.; Santana, A.; Mendoza, L. M.

2013-09-01

Recently, with the development of more powerful and accurate computational tools, the inclusion of new didactic materials in the classroom is known to have increased. However, the form in which these materials can be used to enhance the learning process is still under debate. Many different methodologies have been suggested for constructing new relevant curricular material and, among them, just-in-time teaching (JiTT) has arisen as an effective and successful way to improve the content of classes. In this paper, we will show the implemented pedagogic strategies for the courses of geometrical and optical physics for students of optometry. Thus, the use of the GeoGebra software for the geometrical optics class and the employment of new in-house software for the physical optics class created using the high-level programming language Python is shown with the corresponding activities developed for each of these applets.

Synchroton and Simulations Techniques Applied to Problems in Materials Science: Catalysts and Azul Maya Pigments

DOE Office of Scientific and Technical Information (OSTI.GOV)

Chianelli, R.

2005-01-12

Development of synchrotron techniques for the determination of the structure of disordered, amorphous and surface materials has exploded over the past twenty years due to the increasing availability of high flux synchrotron radiation and the continuing development of increasingly powerful synchrotron techniques. These techniques are available to materials scientists who are not necessarily synchrotron scientists through interaction with effective user communities that exist at synchrotrons such as the Stanford Synchrotron Radiation Laboratory (SSRL). In this article we review the application of multiple synchrotron characterization techniques to two classes of materials defined as ''surface compounds.'' One class of surface compounds aremore » materials like MoS{sub 2-x}C{sub x} that are widely used petroleum catalysts used to improve the environmental properties of transportation fuels. These compounds may be viewed as ''sulfide supported carbides'' in their catalytically active states. The second class of ''surface compounds'' is the ''Maya Blue'' pigments that are based on technology created by the ancient Maya. These compounds are organic/inorganic ''surface complexes'' consisting of the dye indigo and palygorskite, a common clay. The identification of both surface compounds relies on the application of synchrotron techniques as described in this report.« less

High temperature adhesives

NASA Technical Reports Server (NTRS)

St.clair, Terry L.

1991-01-01

The aerospace and electronics industries have an ever increasing need for higher performance materials. In recent years, linear aromatic polyimides have been proven to be a superior class of materials for various applications in these industries. The use of this class of polymers as adhesives is continuing to increase. Several NASA Langley developed polyimides show considerable promise as adhesives because of their high glass transition temperatures, thermal stability, resistance to solvents/water, and their potential for cost effective manufacture.

37 CFR 6.2 - Prior U.S. schedule of classes of goods and services.

Code of Federal Regulations, 2014 CFR

2014-07-01

... and polishing materials. 5 Adhesives. 6 Chemicals and chemical compositions. 7 Cordage. 8 Smokers... Fertilizers. 11 Inks and inking materials. 12 Construction materials. 13 Hardware and plumbing and...

37 CFR 6.2 - Prior U.S. schedule of classes of goods and services.

Code of Federal Regulations, 2011 CFR

2011-07-01

... and polishing materials. 5 Adhesives. 6 Chemicals and chemical compositions. 7 Cordage. 8 Smokers... Fertilizers. 11 Inks and inking materials. 12 Construction materials. 13 Hardware and plumbing and...

37 CFR 6.2 - Prior U.S. schedule of classes of goods and services.

Code of Federal Regulations, 2013 CFR

2013-07-01

... and polishing materials. 5 Adhesives. 6 Chemicals and chemical compositions. 7 Cordage. 8 Smokers... Fertilizers. 11 Inks and inking materials. 12 Construction materials. 13 Hardware and plumbing and...

37 CFR 6.2 - Prior U.S. schedule of classes of goods and services.

Code of Federal Regulations, 2012 CFR

2012-07-01

... and polishing materials. 5 Adhesives. 6 Chemicals and chemical compositions. 7 Cordage. 8 Smokers... Fertilizers. 11 Inks and inking materials. 12 Construction materials. 13 Hardware and plumbing and...

The variation of riverbed material due to tropical storms in Shi-Wen River, Taiwan.

PubMed

Lin, Chin-Ping; Wang, Yu-Min; Tfwala, Samkele S; Chen, Ching-Nuo

2014-01-01

Taiwan, because of its location, is a flood prone region and is characterised by typhoons which brings about two-thirds to three quarters of the annual rainfall amount. Consequently, enormous flows result in rivers and entrain some fractions of the grains that constitute the riverbed. Hence, the purpose of the study is to quantify the impacts of these enormous flows on the distribution of grain size in riverbeds. The characteristics of riverbed material prior to and after the typhoon season are compared in Shi-Wen River located at southern Taiwan. These include grain size variation, bimodality, and roughness coefficient. A decrease (65%) and increase (50%) in geometric mean size of grains were observed for subsurface and surface bed material, respectively. Geometric standard deviation decreased in all sites after typhoon. Subsurface material was bimodal prior to typhoons and polymodal after. For surface material, modal class is in the gravel class, while after typhoons it shifts towards cobble class. The reduction in geometric mean resulted to a decrease in roughness coefficient by up to 30%. Finally, the relationship of Shields and Froude numbers are studied and a change in the bed form to antidunes and transition form is observed, respectively.

The Variation of Riverbed Material due to Tropical Storms in Shi-Wen River, Taiwan

PubMed Central

Lin, Chin-Ping; Tfwala, Samkele S.; Chen, Ching-Nuo

2014-01-01

Taiwan, because of its location, is a flood prone region and is characterised by typhoons which brings about two-thirds to three quarters of the annual rainfall amount. Consequently, enormous flows result in rivers and entrain some fractions of the grains that constitute the riverbed. Hence, the purpose of the study is to quantify the impacts of these enormous flows on the distribution of grain size in riverbeds. The characteristics of riverbed material prior to and after the typhoon season are compared in Shi-Wen River located at southern Taiwan. These include grain size variation, bimodality, and roughness coefficient. A decrease (65%) and increase (50%) in geometric mean size of grains were observed for subsurface and surface bed material, respectively. Geometric standard deviation decreased in all sites after typhoon. Subsurface material was bimodal prior to typhoons and polymodal after. For surface material, modal class is in the gravel class, while after typhoons it shifts towards cobble class. The reduction in geometric mean resulted to a decrease in roughness coefficient by up to 30%. Finally, the relationship of Shields and Froude numbers are studied and a change in the bed form to antidunes and transition form is observed, respectively. PMID:24526910

How is that done? Student views on resources used outside the engineering classroom

NASA Astrophysics Data System (ADS)

Maclaren, Peter

2018-07-01

While the traditional lecture remains a key feature in the teaching of mathematically intensive disciplines at a tertiary level, what students do outside class, the resources they use, and how they use them are critical factors in their success. This study reports on a survey of students studying a range of engineering subjects, giving their views on the effectiveness of resources that they use outside the classroom. Resource types examined included textbooks, lecturer course notes, in-class developed notes, and other online material, including multimedia. While lecturer-generated material was generally seen as more effective than formal textbooks and social media, external screencasts were rated as most effective where material appropriate to their class was available. It is suggested that student use of screencast resources has the potential to facilitate improved learning outcomes, and with accompanying changes in assessment focus, may enable more substantive pedagogical changes.

49 CFR 179.300-7 - Materials.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW) § 179.300-7 Materials. (a) Steel plate material used...

49 CFR 179.300-7 - Materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW) § 179.300-7 Materials. (a) Steel plate material used...

Graphene Oxide Derivatives as Hole- and Electron-Extraction Layers for High-Performance Polymer Solar Cells

DTIC Science & Technology

2013-11-20

Graphene oxide derivatives as hole- and electron- extraction layers for high-performance polymer solar cells Jun Liu,*a Michael Durstockb and Liming...oxide (GO) and its derivatives have been used as a new class of efficient hole- and electron-extraction materials in polymer solar cells (PSCs...new class of efficient hole- and electron-extraction materials in polymer solar cells (PSCs). Highly efficient and stable PSCs have been fabricated

Comparison between Effects in Two Blended Classes Which E-Learning Is Used inside and outside Classroom

ERIC Educational Resources Information Center

Miyaji, Isao

2011-01-01

In cases where e-learning is used mainly outside the class, a lecture is given by lecture slide and a small test is given at the end of the class. Students fill out a problem in a structured notebook by viewing lecture slide materials in the e-learning after a lecture. In cases where e-learning is used during school hours, the outline of class on…

A Comparison of Inquiry Activities in Elementary Science Classes by Means of Tape Recordings.

ERIC Educational Resources Information Center

Horine, Norman Wayne

Reported is a study to determine differences between selected elementary Index, Revised Inquiry Index, percentage of class time spent in pupil experiment Index, Revised Inquiry Index, percentage of class time spend in pupil experiment and time spent in reading and/or extended viewing activities. Audio-tape recordings were made using materials from…

Does "Flipping" Promote Engagement?: A Comparison of a Traditional, Online, and Flipped Class

ERIC Educational Resources Information Center

Burke, Alison S.; Fedorek, Brian

2017-01-01

"Flipped" or inverted classrooms are designed to utilize class time for application and knowledge building, while course content is delivered through the use of online lectures and watched at home on the students' time. It is believed that flipped classrooms promote student engagement and a deeper understanding of the class material. The…

OUR READING TOOLBOX: The Reading-Thinking Connection in a Community College Developmental Reading Class

ERIC Educational Resources Information Center

Garcia-Navarrete, Sylvia; Sax, Caren; Levine, Joel

2012-01-01

The nature and role of developmental education classes are under tremendous scrutiny across the nation today. Specifically, students are entering community college and four-year institutions of higher education unprepared to understand and apply much of the reading material presented to them in college-level classes. This article describes the…

Finite-difference time-domain simulation of electromagnetic bandgap and bi-anisotropic metamaterials

NASA Astrophysics Data System (ADS)

Bray, Matthew G.

The term "Metamaterial" has been introduced into the electromagnetic lexicon in recent years to describe new artificial materials with electromagnetic properties that are not found in naturally occurring materials. Metamaterials exhibit electromagnetic properties that are not observed in its constituent materials, and/or not observed in nature. This thesis will analyze two different classes of metamaterials through the use of the finite-difference time-domain (FDTD) technique. The first class of metamaterials are artificial magnetic conductors (AMC) which approximate the behavior of a perfect magnetic conductor (PMC) over a finite frequency range. The AMC metamaterials are created through the use of an electromagnetic bandgap (EBG) structure. A periodic FDTD code is used to simulate a full-wave model of the metallodielectric EBG structures. The AMCs developed with the aid of the FDTD tool are then used to create low-profile antenna systems consisting of a dipole antenna in close proximity to an AMC surface. Through the use of this FDTD tool, several original contributions were made to the electromagnetic community. These include the first dual-band independently tunable EBG AMC ground plane and the first linearly polarized single-band and dual-band tunable antenna/EBG systems. The second class of materials analyzed are bi-anisotropic metamaterials. Bi-anisotropic media are the largest class of linear media which is able to describe the macroscopic material properties of artificial dielectrics, artificial magnetics, artificial chiral materials, left-handed materials, and other composite materials. The dispersive properties of these materials can be approximated by the oscillator model. This model assumes a Lorentzian frequency profile for the permittivity and permeability and a Condon model for chirality. A new FDTD formulation is introduced which can simulate this type of bi-anisotropic media. This FDTD method incorporates the dispersive material properties through a Z-transform technique derived from the constitutive relations for bi-anisotropic media. This is the first FDTD formulation to be able to simulate dispersive chiral media on a single FDTD grid. This tool was also used to perform the first simulations of dispersive chiral frequency selective surfaces.

Qualitative Analysis of Animation versus Reading for Pre-Class Preparation in a "Flipped" Classroom

ERIC Educational Resources Information Center

Persky, Adam M.

2015-01-01

The "flipped" classroom model, including such approaches as team-based learning (TBL), stresses pre-class preparation. For three years in a pharmacokinetics course within a pharmacy curriculum, students had the choice of using reading material or a fully animated module to prepare for class. Qualitative methods were used to analyze…

Case-Based Instructional Practices: A Multiple-Case Study from Torts, Marketing, and Online Instructional Design Classes

ERIC Educational Resources Information Center

Jung, Ji yoon

2017-01-01

The purpose of this study is to provide a comprehensive account on case-based instructional practices. Semester-long participant observation records in torts, marketing, and online instructional design classes, instructor interviews, course syllabi and teaching materials were used to describe the within-class complexity of the practices in terms…

Using Clickers to Improve Student Engagement and Performance in an Introductory Biochemistry Class

ERIC Educational Resources Information Center

Addison, Stephen; Wright, Adrienne; Milner, Rachel

2009-01-01

As part of ongoing efforts to enhance teaching practices in a large-class introductory biochemistry course, we have recently tested the effects of using a student response system (clickers) on student exam performances and engagement with the course material. We found no measurable difference in class mean composite examination score for students…

Acquisition and analysis of a spectral and bidirectional database of urban materials over Toulouse (France)

NASA Astrophysics Data System (ADS)

Briottet, X.; Lachérade, S.; Pallotta, S.; Miesch, C.; Tanguy, B.; Le Men, H.

2006-05-01

This paper presents an experiment carried out in Toulouse in 2004. This campaign aims to create a specific library which will give us simultaneously information in three domains: a list of the main materials present in the city, the optical properties of each of them (spectral and directional) and their spatial variability in a given class. The spectral domain covers the entire optical domain from the visible to the Long Wave InfraRed range. Measurements have been carried out in the visible and near infrared spectral region (400-2500 nm) with an ASD spectroradiometer at a 20 cm resolution for outdoors measurements, and with a goniometer for laboratory ones at the same spatial resolution. A database of about 550 individual spectra has been created. These spectra could be divided into 4 classical urban classes like road (red asphalt, tar), pavement (red asphalt, tar), square (granite slab) and wall (brick, concrete). In addition to these "in situ" experiments, the bi-directional behaviours of urban material samples have been studied in laboratory with the Onera goniometer. Two material types have been distinguished: flat materials, which is isotropic, and textured materials, whose study is more complex. Whereas road and sidewalk materials are quite lambertian with a slight backscattering effect typical of rough surfaces, square materials like granite or concrete present a specular peak at large zenith angle. A specific study on tiles demonstrates their important anisotropic directional properties. In the infrared domain (3μm - 14μm), a SOC 400 spectroradiometer was used at a 1.27cm spatial resolution. A database of about 100 individual spectra has been created. These spectra could be divided into four classical urban classes like road (red asphalt, tar), pavement (red asphalt, tar), square (granite slab) and wall (bricks, painted walls). In each spectral domain, three variability types are considered: a physical variability which is intrinsic to the material, a contextual variability depending on the material use and a theoretical variability which is the one observed inside a chosen class.

Simple Practical Investigations Using Invertase.

ERIC Educational Resources Information Center

Asare-Brown, Emma; Bullock, Clive

1988-01-01

Describes three activities, substrate inhibition, product inhibition by fructose and glucose, and gel immobilization of invertase for use with undergraduate biochemistry classes. Discusses materials, methods, and results. Stresses the advantages of practical exercises in undergraduate classes. (CW)

Accessing Synthetically-Challenging Isoindole-Based Materials for Assessment in Organic Photovoltaics via Chemical and Engineering Methodologies =

NASA Astrophysics Data System (ADS)

Dang, Jeremy

Isoindoles are a broad class of compounds that comprise a very small space within the domain of established photoactive materials for organic photovoltaics (OPVs). Given this scarcity, combined with the performance appeal of presently and well known isoindole-based compounds such as the phthalocyanines, it is a worthy undertaking to develop new materials in this domain. This thesis aims to bring to light the suitability of five novel, or underexplored, classes of isoindole-based materials for OPVs. These classes are the boron subphthalocyanine (BsubPc) polymers, oxygen-bridged dimers of BsubPcs (mu-oxo-(BsubPc) 2), boron subnaphthalocyanines (BsubNcs), group XIII metal complexes of 1,3-bis(2-pyridylimino)isodinoline (BPI), and the boron tribenzosubporphyrins (BsubPys). The synthesis of these materials was proven to be challenging as evident in their low isolated yields, lengthy synthetic and purification processes, and/or batch-to-batch variations. This outcome was not surprising given their undeveloped chemical nature. The photo- and electro-physical properties were characterized and shown to be desirable for all classes other than the group XIII metal complexes of BPI for OPVs. mu-Oxo-(BsubPc)2 and BsubNcs show promise in this application while BsubPc polymers and BsubPys will be subjects of future exploration. The results from the work herein aid to develop and strengthen the fundamental understanding of the structure-property relationships of isoindole derivatives. On a broader scale, the work demonstrates their versatility as functional materials for OPVs and their possible expansion to other organic electronic technologies like organic light emitting diodes and organic field effect transistors.

Glass ionomer-silver cermet Class II tunnel-restorations for primary molars.

PubMed

Croll, T P

1988-01-01

Tunnel preparations preserve the anatomical marginal ridge and minimize the loss of healthy tooth structure adjacent to the carious lesion. When the practitioner has developed proficiency in restoring class II carious lesions with tunnel restorations, less treatment time is required than with traditional class II preparations. The technique for restoring a primary first molar with a class II carious lesion, using a tunnel preparation and Ketac-Silver restorative material is described.

Isotope and multiband effects in layered superconductors.

PubMed

Bussmann-Holder, Annette; Keller, Hugo

2012-06-13

In this review we consider three classes of superconductors, namely cuprate superconductors, MgB(2) and the new Fe based superconductors. All of these three systems are layered materials and multiband compounds. Their pairing mechanisms are under discussion with the exception of MgB(2), which is widely accepted to be a 'conventional' electron-phonon interaction mediated superconductor, but extending the Bardeen-Cooper-Schrieffer (BCS) theory to account for multiband effects. Cuprates and Fe based superconductors have higher superconducting transition temperatures and more complex structures. Superconductivity is doping dependent in these material classes unlike in MgB(2) which, as a pure compound, has the highest values of T(c) and a rapid suppression of superconductivity with doping takes place. In all three material classes isotope effects have been observed, including exotic ones in the cuprates, and controversial ones in the Fe based materials. Before the area of high-temperature superconductivity, isotope effects on T(c) were the signature for phonon mediated superconductivity-even when deviations from the BCS value to smaller values were observed. Since the discovery of high T(c) materials this is no longer evident since competing mechanisms might exist and other mediating pairing interactions are discussed which are of purely electronic origin. In this work we will compare the three different material classes and especially discuss the experimentally observed isotope effects of all three systems and present a rather general analysis of them. Furthermore, we will concentrate on multiband signatures which are not generally accepted in cuprates even though they are manifest in various experiments, the evidence for those in MgB(2), and indications for them in the Fe based compounds. Mostly we will consider experimental data, but when possible also discuss theoretical models which are suited to explain the data.

Recent Developments in Antimicrobial Polymers: A Review

PubMed Central

Santos, Madson R. E.; Fonseca, Ana C.; Mendonça, Patrícia V.; Branco, Rita; Serra, Arménio C.; Morais, Paula V.; Coelho, Jorge F. J.

2016-01-01

Antimicrobial polymers represent a very promising class of therapeutics with unique characteristics for fighting microbial infections. As the classic antibiotics exhibit an increasingly low capacity to effectively act on microorganisms, new solutions must be developed. The importance of this class of materials emerged from the uncontrolled use of antibiotics, which led to the advent of multidrug-resistant microbes, being nowadays one of the most serious public health problems. This review presents a critical discussion of the latest developments involving the use of different classes of antimicrobial polymers. The synthesis pathways used to afford macromolecules with antimicrobial properties, as well as the relationship between the structure and performance of these materials are discussed. PMID:28773721

49 CFR 173.424 - Excepted packages for radioactive instruments and articles.

Code of Federal Regulations, 2011 CFR

2011-10-01

... HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS SHIPPERS-GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS Class 7 (Radioactive) Materials § 173.424....1 mSv/hour (10 mrem/hour); (e) The active material is completely enclosed by non-active components...

49 CFR 173.424 - Excepted packages for radioactive instruments and articles.

Code of Federal Regulations, 2010 CFR

2010-10-01

... HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS SHIPPERS-GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS Class 7 (Radioactive) Materials § 173.424....1 mSv/hour (10 mrem/hour); (e) The active material is completely enclosed by non-active components...

Cytochemistry of fat body trophocytes and ovaries of workers and queens of Melipona quadrifasciata anthidioides (Hymenoptera: Apidae: Meliponini) during vitellogenesis.

PubMed

Paes-de-Oliveira, Vagner Tadeu; Roat, Thaisa Cristina; Berger, Bruno; Da Cruz-Landim, Carminda

2012-12-01

The fat body (FB) of insects is where yolk proteins are synthesized. Therefore, relationships between the FB and oogenesis were studied in nurse workers, virgins, and physogastric queens of Melipona quadrifasciata anthidioides, a stingless bee in which the workers produce and lay eggs while provisioning brood cells. The relationships between FB and oogenesis, as well as the routes of materials from hemolymph to the oocytes, were studied through the cytochemical detection of lipids by osmium imidazole (OI), carbohydrates by ruthenium red (RR) and basic proteins by ammoniacal silver (AS). The results show differences in the presence of the studied materials in FB trophocytes and ovary of the classes of females studied and oogenesis phases. Material that tested positive for the treatments was detected among the classes of individuals studied in both, trophocytes and oocytes, and in the route of those materials from hemolymph to the oocytes. The differences found among the individual classes indicate relationships with the nutrition and adaptation to the parsimonious use of nutrients in the metabolism of reproduction. Copyright © 2012 Wiley Periodicals, Inc.

Roofing: Workbook and Tests. Common Roofing and Waterproofing Materials and Equipment.

ERIC Educational Resources Information Center

California State Dept. of Education, Sacramento. Bureau of Publications.

This workbook on materials and equipment is one of a series of nine individual units of instruction for roofing apprenticeship classes in California. The workbook covers eight topics: production of bitumens and asphaltic roofing materials; built-up roofing materials and adhesives; asphaltic products and rigid roofing materials; elastomeric and…

Common Roofing and Waterproofing Materials and Equipment. Roofing Workbook and Tests.

ERIC Educational Resources Information Center

California State Dept. of Education, Sacramento. Bureau of Publications.

This publication on common roofing and waterproofing materials and equipment is one of a series of units of instruction for roofing apprenticeship classes. The workbook portion is divided into eight topics: production of bitumens and asphalt roofing materials, built-up materials and adhesives, asphalt products and rigid roofing materials,…

Study made of dielectric properties of promising materials for cryogenic capacitors

NASA Technical Reports Server (NTRS)

Mathes, K. N.; Minnich, S. H.

1967-01-01

Experimental investigations were conducted to determine dielectric properties of promising materials for cryogenic capacitors to be used in energy storage and pulse applications. The three classes of materials investigated were inorganic bonded ferroelectric materials, anodic coatings on metal foils, and polar low temperature liquids.

49 CFR 105.5 - Definitions.

Code of Federal Regulations, 2010 CFR

2010-10-01

... hazardous substances, hazardous wastes, marine pollutants, elevated temperature materials, materials... defining criteria for hazard classes and divisions in part 173 of subchapter C of this chapter. Hazardous...

10 CFR 72.72 - Material balance, inventory, and records requirements for stored materials.

Code of Federal Regulations, 2010 CFR

2010-01-01

... 10 Energy 2 2010-01-01 2010-01-01 false Material balance, inventory, and records requirements for stored materials. 72.72 Section 72.72 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSING...-RELATED GREATER THAN CLASS C WASTE Records, Reports, Inspections, and Enforcement § 72.72 Material balance...

10 CFR 72.72 - Material balance, inventory, and records requirements for stored materials.

Code of Federal Regulations, 2011 CFR

2011-01-01

... 10 Energy 2 2011-01-01 2011-01-01 false Material balance, inventory, and records requirements for stored materials. 72.72 Section 72.72 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSING...-RELATED GREATER THAN CLASS C WASTE Records, Reports, Inspections, and Enforcement § 72.72 Material balance...

49 CFR 179.500-5 - Material.

Code of Federal Regulations, 2010 CFR

2010-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS SPECIFICATIONS FOR TANK CARS Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A) § 179.500-5 Material. (a) Tanks shall be made from open-hearth or electric steel of uniform quality. Material...

Teaching SSE and Some of Its Applications in Junior High School.

ERIC Educational Resources Information Center

Bernard, John E.

This paper describes the development of curriculum materials for teaching the Sum of Squared Errors (SSE) to one class of 25 eighth graders in Hawaii. Microcomputers were used in class. Prior to explicit introduction of the SSE students were given repeated contact with a data base of various statistics collected from members of their class. Then a…

A process-oriented guided inquiry approach to teaching medicinal chemistry.

PubMed

Brown, Stacy D

2010-09-10

To integrate process-oriented guided-inquiry learning (POGIL) team-based activities into a 1-semester medicinal chemistry course for doctor of pharmacy (PharmD) students and determine the outcomes. Students in the fall 2007 section of the Medicinal Chemistry course were taught in a traditional teacher-centered manner, with the majority of class time spent on lectures and a few practice question sets. Students in the fall 2008 and fall 2009 sections of Medicinal Chemistry spent approximately 40% of class time in structured self-selected teams where they worked through guided-inquiry exercises to supplement the lecture material. The mean examination score of students in the guided-inquiry sections (fall 2008 and fall 2009) was almost 3 percentage points higher than that of students in the fall 2007 class (P < 0.05). Furthermore, the grade distribution shifted from a B-C centered distribution (fall 2007 class) to an A-B centered distribution (fall 2008 and fall 2009 classes). The inclusion of the POGIL style team-based learning exercises improved grade outcomes for the students, encouraged active engagement with the material during class time, provided immediate feedback to the instructor regarding student-knowledge deficiencies, and created a classroom environment that was well received by students.

Enacted Types of Algebraic Activity in Different Classes Taught by the Same Teacher

ERIC Educational Resources Information Center

Eisenmann, Tammy; Even, Ruhama

2011-01-01

The aim of this study was to examine how teachers enact the same written algebra curriculum materials in different classes. The study addresses this issue by comparing the types of algebraic activity (Kieran, 2004) enacted in two 7th grade classes taught by the same teacher, using the same textbook. Data sources include lesson observations and an…

Student Mastery of the Sun-Earth-Moon System in a Flipped Classroom of Pre-service Elementary Education Students

NASA Astrophysics Data System (ADS)

Larsen, Kristine

2014-01-01

One of the current trends in pedagogy at all levels(K-college) is the so-called ‘flipped classroom’, in which students prepare for a class meeting through self-study of the material. It is based on a rejection of the classic model of the faculty member as the ‘sage on the stage’ instead, responsibility for learning shifts to the individual student. The faculty member takes on the role of learning facilitator or mentor, and focuses the students’ learning by crafting and administering timely formative assessments (in multiple formats and applied multiple times) that aid both students and the faculty member in tracking the students’ mastery of the learning outcomes. In a flipped, freshman-only, section of SCI 111 Elementary Earth-Physical Sciences (a required introductory science course for pre-service elementary school teachers) the students learned through a combination of individual and group hands-on in-class activities, technology (including PowerPoint presentations and short videos viewed prior to attending class), in-class worksheets, and in-class discussions. Students self-differentiated in how they interacted with the available teaching materials, deciding which activities to spend the most time on based on their individual needs (based on an online quiz taken the night before the class period, and their personal self-confidence with the material). Available in-class activities and worksheets were developed by the faculty member based on student scores on the online quiz as well as personal messages submitted through the course management system the night before the class meeting. While this placed a significant burden on the faculty member in terms of course preparation, it allowed for just-in-time teaching to take place. This poster describes the results of student mastery of content centered on the sun-earth-moon system (specifically seasons, moon phases, and eclipses) as compared to traditional classroom sections.

Modeling of the solution interaction properties of plastic materials used in pharmaceutical product container systems.

PubMed

Jenke, Dennis; Couch, Tom; Gillum, Amy; Sadain, Salma

2009-01-01

Material/water equilibrium binding constants (Eb) were determined for 14 organic solutes and 17 plastic raw materials that could be used in pharmaceutical product container systems. Correlations between the measured binding constants and the organic solute's octanol/water and hexane/water partition coefficients were obtained. In general, while the materials examined exhibited a wide range of binding characteristics, the tested materials by and large fell within two broad classes: (1) those that were octanol-like in their binding characteristics, and (2) those that were hexane-like. Materials of the same class (e.g., polypropylenes) generally had binding models that were very similar. Rank ordering of the materials in terms of their magnitude of drug binding (least binding to most binding) was as follows: polypropylene < polyethylene < polyamide < styrene-ethylene-butylene-styrene < copolyester ether elastomer approximately equal to amine-terminated poly fatty acid amide polymer. The utilization of the developed models to estimate drug loss via sorption by the container is discussed.

Development of Integrated Natural Science Teaching Materials Webbed Type with Applying Discourse Analysis on Students Grade VIII in Physics Class

NASA Astrophysics Data System (ADS)

Sukariasih, Luh

2017-05-01

This study aims to produce teaching materials integrated natural science (IPA) webbed type of handout types are eligible for use in integrated science teaching. This type of research IS a kind of research and development / Research and Development (R & D) with reference to the 4D development model that is (define, design, develop, and disseminate). Data analysis techniques used to process data from the results of the assessment by the validator expert, and the results of the assessment by teachers and learners while testing is limited (12 students of class VIII SMPN 10 Kendari) using quantitative descriptive data analysis techniques disclosed in the distribution of scores on the scale of five categories grading scale that has been determined. The results of due diligence material gain votes validator material in the category of “very good” and “good”, of the data generated in the feasibility test presentation obtained the category of “good” and “excellent”, from the data generated in the feasibility of graphic test obtained the category of “very good “and” good “, as well as of the data generated in the test the feasibility of using words and language obtained the category of“very good “and” good “, so with qualifications gained the teaching materials IPA integrated type webbed by applying discourse analysis on the theme of energy and food for Junior High School (SMP) grade VIII suitable as teaching materials. In limited testing, data generated in response to a science teacher at SMPN 10 Kendari to product instructional materials as “excellent”, and from the data generated while testing is limited by the 12 students of class VIII SMPN 10 Kendari are more students who score indicates category “very good”, so that the qualification obtained by the natural science (IPA) teaching material integrated type webbed by applying discourse analysis on the theme of energy and food for SMP / class VIII fit for use as teaching material.

What Predicts Student Success in Introductory Data Management Classes? An Investigation of Demographic, Personality, Computer-Related, and Interaction Variables

ERIC Educational Resources Information Center

Harris, Kenneth J.; Harris, Ranida B.; Lambert, Alysa D.

2011-01-01

Introduction to data management classes are often times students' first exposure to advanced material in these areas. Many factors are likely to influence success in these classes, but empirical investigations have focused on relatively few variables. In this study, we extend this research by examining the relative contributions of the previously…

Effects of pulp capping materials on fracture resistance of Class II composite restorations

PubMed Central

Kucukyilmaz, Ebru; Yasa, Bilal; Akcay, Merve; Savas, Selcuk; Kavrik, Fevzi

2015-01-01

Objective: The aim of this study was to investigate the effect of cavity design and the type of pulp capping materials on the fracture resistance of Class II composite restorations. Materials and Methods: Sixty freshly extracted, sound molar teeth were selected for the study. A dovetail cavity on the mesio-occlusal and a slot cavity on disto-occlusal surfaces of each tooth were prepared, and the teeth were divided 4 groups which one of them as a control group. The pulp capping materials (TheraCal LC, Calcimol LC, Dycal) applied on pulpo-axial wall of each cavity, and the restoration was completed with composite resin. The teeth were subjected to a compressive load in a universal mechanical testing machine. The surfaces of the tooth and restoration were examined under a stereomicroscope. The data were analyzed using factorial analysis of variance and Tukey's test. Results: For pulp capping materials, the highest fracture load (931.15 ± 203.81 N) and the lowest fracture load (832.28 ± 245.75 N) were calculated for Control and Dycal group, respectively. However, there were no statistically significant differences among all groups (P > 0.05). The fracture load of the dovetail groups was significantly higher than those of the slot cavity groups (P < 0.05). Conclusion: Dovetail cavity design shows better fracture resistance in Class II composite restorations, independent of used or not used pulp capping materials. PMID:26038653

Distance Learning between German and Japanese School Classes Based on a Real Time Video Conference Environment.

ERIC Educational Resources Information Center

Graf, Klaus-D.

We have established an environment for German-Japanese school education projects using real time interactive audio-visual distance learning between remote classrooms. In periods of 8-12 weeks, two classes are dealing with the same subject matter, exchanging materials and results via e-mail and Internet. At 3 or 4 occasions the classes met on…

49 CFR 173.2a - Classification of a material having more than one hazard.

Code of Federal Regulations, 2014 CFR

2014-10-01

... explosives. 3 Denotes an impossible combination. 4 For pesticides only, where a material has the hazards of... 5.2 (organic peroxide) material that meets the definition of any other hazard class or division as...

49 CFR 173.2a - Classification of a material having more than one hazard.

Code of Federal Regulations, 2013 CFR

2013-10-01

... explosives. 3 Denotes an impossible combination. 4 For pesticides only, where a material has the hazards of... 5.2 (organic peroxide) material that meets the definition of any other hazard class or division as...

49 CFR 173.2a - Classification of a material having more than one hazard.

Code of Federal Regulations, 2012 CFR

2012-10-01

... explosives. 3 Denotes an impossible combination. 4 For pesticides only, where a material has the hazards of... 5.2 (organic peroxide) material that meets the definition of any other hazard class or division as...

49 CFR 173.2a - Classification of a material having more than one hazard.

Code of Federal Regulations, 2011 CFR

2011-10-01

... explosives. 3 Denotes an impossible combination. 4 For pesticides only, where a material has the hazards of... 5.2 (organic peroxide) material that meets the definition of any other hazard class or division as...

Using Ultrasonic Lamb Waves To Measure Moduli Of Composites

NASA Technical Reports Server (NTRS)

Kautz, Harold E.

1995-01-01

Measurements of broad-band ultrasonic Lamb waves in plate specimens of ceramic-matrix/fiber and metal-matrix/fiber composite materials used to determine moduli of elasticity of materials. In one class of potential applications of concept, Lamb-wave responses of specimens measured and analyzed at various stages of thermal and/or mechanical processing to determine effects of processing, without having to dissect specimens. In another class, structural components having shapes supporting propagation of Lamb waves monitored ultrasonically to identify signs of deterioration and impending failure.

Lifecycle Management of Hazardous Materials/ Hazardous Waste. Revision 1.

DTIC Science & Technology

1997-02-01

1 WHAT YOU NEED TO KNOW ABOUT HAZARDOUS MATERIALS (HM) ....................... 1 PURCHASING HAZARDOUS MATERIALS...20 Figures 1 . Acquisition Flowchart .................................. 12 2. NRaD Hazardous Material Pre-Purchase Checklist ........ 13 3. NRaD...Hazardous Waste Profile Sheet (Part 111) .................. 18 Tables 1 . Class 1 Ozone Depleting Substances .................... 11 i INTRODUCTION This

49 CFR 172.202 - Description of hazardous material on shipping papers.

Code of Federal Regulations, 2010 CFR

2010-10-01

... HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE... description must be indicated (by mass or volume, or by activity for Class 7 materials) and must include an... mass. For an explosive that is an article, such as Cartridges, small arms, the net explosive mass may...

49 CFR 173.468 - Test for LSA-III material.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 2 2014-10-01 2014-10-01 false Test for LSA-III material. 173.468 Section 173.468 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS SHIPPERS-GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS Class 7 ...

49 CFR 173.468 - Test for LSA-III material.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Test for LSA-III material. 173.468 Section 173.468 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS SHIPPERS-GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS Class 7 ...

Design of Lead-Free Inorganic Halide Perovskites for Solar Cells via Cation-Transmutation.

PubMed

Zhao, Xin-Gang; Yang, Ji-Hui; Fu, Yuhao; Yang, Dongwen; Xu, Qiaoling; Yu, Liping; Wei, Su-Huai; Zhang, Lijun

2017-02-22

Hybrid organic-inorganic halide perovskites with the prototype material of CH 3 NH 3 PbI 3 have recently attracted intense interest as low-cost and high-performance photovoltaic absorbers. Despite the high power conversion efficiency exceeding 20% achieved by their solar cells, two key issues-the poor device stabilities associated with their intrinsic material instability and the toxicity due to water-soluble Pb 2+ -need to be resolved before large-scale commercialization. Here, we address these issues by exploiting the strategy of cation-transmutation to design stable inorganic Pb-free halide perovskites for solar cells. The idea is to convert two divalent Pb 2+ ions into one monovalent M + and one trivalent M 3+ ions, forming a rich class of quaternary halides in double-perovskite structure. We find through first-principles calculations this class of materials have good phase stability against decomposition and wide-range tunable optoelectronic properties. With photovoltaic-functionality-directed materials screening, we identify 11 optimal materials with intrinsic thermodynamic stability, suitable band gaps, small carrier effective masses, and low excitons binding energies as promising candidates to replace Pb-based photovoltaic absorbers in perovskite solar cells. The chemical trends of phase stabilities and electronic properties are also established for this class of materials, offering useful guidance for the development of perovskite solar cells fabricated with them.

78 FR 46560 - Pipeline Safety: Class Location Requirements

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-01

... DEPARTMENT OF TRANSPORTATION Pipeline and Hazardous Materials Safety Administration 49 CFR Part... class location requirements for gas transmission pipelines. Section 5 of the Pipeline Safety, Regulatory... and, with respect to gas transmission pipeline facilities, whether applying IMP requirements to...

Improving Attitudes of High School Students toward Their Handicapped Peers.

ERIC Educational Resources Information Center

Handlers, Adele; Austin, Katherine

1980-01-01

Twenty secondary students participated in a sociology class training program judged by them as successful in acquainting them with handicapping conditions and handicapped people, easing mainstreaming, and developing teaching materials for use in other classes. (CL)

Influence of Reading Material Characteristics on Study Time for Pre-Class Quizzes in a Flipped Classroom

PubMed Central

Hogg, Abigail

2017-01-01

Objective. To examine how instructor-developed reading material relates to pre-class time spent preparing for the readiness assurance process (RAP) in a team-based learning (TBL) course. Methods. Students within pharmacokinetics and physiology were asked to self-report the amount of time spent studying for the RAP. Correlation analysis and multilevel linear regression techniques were used to identify factors within the pre-class reading material that contribute to self-reported study time. Results. On average students spent 3.2 hours preparing for a section of material in the TBL format. The ratio of predicted reading time, based on reading speed and word count, and self-reported study time was greater than 1:3. Self-reported study time was positively correlated with word count, number of tables and figures, and overall page length. For predictors of self-reported study time, topic difficulty and number of figures were negative predictors whereas word count and number of self-assessments were positive predictors. Conclusion. Factors related to reading material are moderate predictors of self-reported student study time for an accountability assessment. A more significant finding is student self-reported study time is much greater than the time predicted by simple word count. PMID:28970604

Influence of Reading Material Characteristics on Study Time for Pre-Class Quizzes in a Flipped Classroom.

PubMed

Persky, Adam M; Hogg, Abigail

2017-08-01

Objective. To examine how instructor-developed reading material relates to pre-class time spent preparing for the readiness assurance process (RAP) in a team-based learning (TBL) course. Methods. Students within pharmacokinetics and physiology were asked to self-report the amount of time spent studying for the RAP. Correlation analysis and multilevel linear regression techniques were used to identify factors within the pre-class reading material that contribute to self-reported study time. Results. On average students spent 3.2 hours preparing for a section of material in the TBL format. The ratio of predicted reading time, based on reading speed and word count, and self-reported study time was greater than 1:3. Self-reported study time was positively correlated with word count, number of tables and figures, and overall page length. For predictors of self-reported study time, topic difficulty and number of figures were negative predictors whereas word count and number of self-assessments were positive predictors. Conclusion. Factors related to reading material are moderate predictors of self-reported student study time for an accountability assessment. A more significant finding is student self-reported study time is much greater than the time predicted by simple word count.

Re-Envisioning the Introductory Physics Sequence at Georgia Gwinnett College (GGC)

NASA Astrophysics Data System (ADS)

Thompson, Scott J.; Sales, Kenneth B.

2013-03-01

GGC is a new, 4-year, open-access institution located in the northeast of Atlanta. As an open access college, many of the students who take the introductory physics sequence do not have a strong mathematical background. A large percentage of the students have significant work or family obligations in addition to being full-time students. To better serve these students, the first semester of the trig-based introductory physics sequence was modified in a manner that focuses and structures the material to be completed by the students both outside and inside of class such that the time spent outside of class can be reduced. Specifically, focused notes were provided to the students with an online assignment prior to class in place of reading from a textbook. Class time was then focused on a deeper understanding of the concepts to be covered instead of an initial (or secondary) introduction to the material. Data was collected for specific exam questions and compared with the results from previous classes taught by the same instructors. An overview of the results and observations of the instructors using this method will be discussed.

Opportunities for Low Cost Titanium in Reduced Fuel Consumption, Improved Emissions, and Enhanced Durability Heavy Duty Vehicles

DOE Office of Scientific and Technical Information (OSTI.GOV)

Kraft, E.H.

2002-07-22

The purpose of this study was to determine which components of heavy-duty highway vehicles are candidates for the substitution of titanium materials for current materials if the cost of those Ti components is very significantly reduced from current levels. The processes which could be used to produce those low cost components were also investigated. Heavy-duty highway vehicles are defined as all trucks and busses included in Classes 2C through 8. These include heavy pickups and vans above 8,500 lbs. GVWR, through highway tractor trailers. Class 8 is characterized as being a very cyclic market, with ''normal'' year volume, such asmore » in 2000, of approximately 240,000 new vehicles. Classes 3-7 are less cyclic, with ''normal'' i.e., year 2000, volume totaling approximately 325,000 new vehicles. Classes 3-8 are powered about 88.5% by diesel engines, and Class 2C at very roughly 83% diesel. The engine portion of the study therefore focused on diesels. Vehicle production volumes were used in estimates of the market size for candidate components.« less

Waveguide-based electro-absorption modulator performance: comparative analysis

NASA Astrophysics Data System (ADS)

Amin, Rubab; Khurgin, Jacob B.; Sorger, Volker J.

2018-06-01

Electro-optic modulation is a key function for data communication. Given the vast amount of data handled, understanding the intricate physics and trade-offs of modulators on-chip allows revealing performance regimes not explored yet. Here we show a holistic performance analysis for waveguide-based electro-absorption modulators. Our approach centers around material properties revealing obtainable optical absorption leading to effective modal cross-section, and material broadening effects. Taken together both describe the modulator physical behavior entirely. We consider a plurality of material modulation classes to include two-level absorbers such as quantum dots, free carrier accumulation or depletion such as ITO or Silicon, two-dimensional electron gas in semiconductors such as quantum wells, Pauli blocking in Graphene, and excitons in two-dimensional atomic layered materials such as found in transition metal dichalcogendies. Our results show that reducing the modal area generally improves modulator performance defined by the amount of induced electrical charge, and hence the energy-per-bit function, required switching the signal. We find that broadening increases the amount of switching charge needed. While some material classes allow for reduced broadening such as quantum dots and 2-dimensional materials due to their reduced Coulomb screening leading to increased oscillator strengths, the sharpness of broadening is overshadowed by thermal effects independent of the material class. Further we find that plasmonics allows the switching charge and energy-per-bit function to be reduced by about one order of magnitude compared to bulk photonics. This analysis is aimed as a guide for the community to predict anticipated modulator performance based on both existing and emerging materials.

The Discovery of a Class of High-Temperature Superconductors.

ERIC Educational Resources Information Center

Muller, K. Alex; Bednorz, J. Georg

1987-01-01

Describes the new class of oxide superconductors, the importance of these materials, and the concepts that led to its discovery. Summarizes the discovery itself and its early confirmation. Discusses the observation of a superconductive glass state in percolative samples. (TW)

Class-conditional feature modeling for ignitable liquid classification with substantial substrate contribution in fire debris analysis.

PubMed

Lopatka, Martin; Sigman, Michael E; Sjerps, Marjan J; Williams, Mary R; Vivó-Truyols, Gabriel

2015-07-01

Forensic chemical analysis of fire debris addresses the question of whether ignitable liquid residue is present in a sample and, if so, what type. Evidence evaluation regarding this question is complicated by interference from pyrolysis products of the substrate materials present in a fire. A method is developed to derive a set of class-conditional features for the evaluation of such complex samples. The use of a forensic reference collection allows characterization of the variation in complex mixtures of substrate materials and ignitable liquids even when the dominant feature is not specific to an ignitable liquid. Making use of a novel method for data imputation under complex mixing conditions, a distribution is modeled for the variation between pairs of samples containing similar ignitable liquid residues. Examining the covariance of variables within the different classes allows different weights to be placed on features more important in discerning the presence of a particular ignitable liquid residue. Performance of the method is evaluated using a database of total ion spectrum (TIS) measurements of ignitable liquid and fire debris samples. These measurements include 119 nominal masses measured by GC-MS and averaged across a chromatographic profile. Ignitable liquids are labeled using the American Society for Testing and Materials (ASTM) E1618 standard class definitions. Statistical analysis is performed in the class-conditional feature space wherein new forensic traces are represented based on their likeness to known samples contained in a forensic reference collection. The demonstrated method uses forensic reference data as the basis of probabilistic statements concerning the likelihood of the obtained analytical results given the presence of ignitable liquid residue of each of the ASTM classes (including a substrate only class). When prior probabilities of these classes can be assumed, these likelihoods can be connected to class probabilities. In order to compare the performance of this method to previous work, a uniform prior was assumed, resulting in an 81% accuracy for an independent test of 129 real burn samples. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

46 CFR 128.220 - Class II non-vital systems-materials and pressure design.

Code of Federal Regulations, 2013 CFR

2013-10-01

... materials and pressure design of subchapter F of this chapter. (b) Piping for salt-water service must be of a corrosion-resistant material and, if ferrous, be hot-dip galvanized or be at least of extra-heavy...

46 CFR 128.220 - Class II non-vital systems-materials and pressure design.

Code of Federal Regulations, 2014 CFR

2014-10-01

... materials and pressure design of subchapter F of this chapter. (b) Piping for salt-water service must be of a corrosion-resistant material and, if ferrous, be hot-dip galvanized or be at least of extra-heavy...

46 CFR 128.220 - Class II non-vital systems-materials and pressure design.

Code of Federal Regulations, 2010 CFR

2010-10-01

... materials and pressure design of subchapter F of this chapter. (b) Piping for salt-water service must be of a corrosion-resistant material and, if ferrous, be hot-dip galvanized or be at least of extra-heavy...

46 CFR 128.220 - Class II non-vital systems-materials and pressure design.

Code of Federal Regulations, 2011 CFR

2011-10-01

... materials and pressure design of subchapter F of this chapter. (b) Piping for salt-water service must be of a corrosion-resistant material and, if ferrous, be hot-dip galvanized or be at least of extra-heavy...

46 CFR 128.220 - Class II non-vital systems-materials and pressure design.

Code of Federal Regulations, 2012 CFR

2012-10-01

... materials and pressure design of subchapter F of this chapter. (b) Piping for salt-water service must be of a corrosion-resistant material and, if ferrous, be hot-dip galvanized or be at least of extra-heavy...

A new class of sonic composites

NASA Astrophysics Data System (ADS)

Munteanu, Ligia; Chiroiu, Veturia; Donescu, Ştefania; Brişan, Cornel

2014-03-01

Transformation acoustics opens a new avenue towards the architecture, modeling and simulation of a new class of sonic composites with scatterers made of various materials and having various shapes embedded in an epoxy matrix. The design of acoustic scatterers is based on the property of Helmholtz equations to be invariant under a coordinate transformation, i.e., a specific spatial compression is equivalent to a new material in a new space. In this paper, the noise suppression for a wide full band-gap of frequencies is discussed for spherical shell scatterers made of auxetic materials (materials with negative Poisson's ratio). The original domain consists of spheres made from conventional foams with positive Poisson's ratio. The spatial compression is controlled by the coordinate transformation, and leads to an equivalent domain filled with an auxetic material. The coordinate transformation is strongly supported by the manufacturing of auxetics which is based on the pore size reduction through radial compression molds.

Ultra-high performance concrete : a state-of-the-art report for the bridge community.

DOT National Transportation Integrated Search

2013-06-01

"The term Ultra-High Performance Concrete (UHPC) refers to a relatively new class of advanced cementitious : composite materials whose mechanical and durability properties far surpass those of conventional concrete. This : class of concrete has been ...

The Essence of Language Is History: A Theoretical Introduction to the Connection between Social Relations and Language Relations in 19th Century Brussels.

ERIC Educational Resources Information Center

de Metsenaere, Machteld

An examination of language use in 19th century Brussels seeks to explain how and why a link between language and social class came into operation. Hypotheses relating the social characteristics (material circumstances and consciousness) of social classes and segments of social classes to various resulting language patterns are proposed. This…

Culture and social class.

PubMed

Miyamoto, Yuri

2017-12-01

A large body of research in Western cultures has demonstrated the psychological and health effects of social class. This review outlines a cultural psychological approach to social stratification by comparing psychological and health manifestations of social class across Western and East Asian cultures. These comparisons suggest that cultural meaning systems shape how people make meaning and respond to material/structural conditions associated with social class, thereby leading to culturally divergent manifestations of social class. Specifically, unlike their counterparts in Western cultures, individuals of high social class in East Asian cultures tend to show high conformity and other-orientated psychological attributes. In addition, cultures differ in how social class impacts health (i.e. on which bases, through which pathways, and to what extent). Copyright © 2017 Elsevier Ltd. All rights reserved.

What hinders teachers in using computer and video games in the classroom? Exploring factors inhibiting the uptake of computer and video games.

PubMed

Baek, Young Kyun

2008-12-01

The purpose of this study is to identify factors inhibiting teachers' use of computer and video games in the classroom setting and to examine the degree to which teaching experience and gender affect attitudes toward using games. Six factors that hinder teachers' use of games in the classroom were discovered: Inflexibility of curriculum, Negative effects of gaming, Students' lack of readiness, Lack of supporting materials, Fixed class schedules, and Limited budgets. Lack of supporting material, Fixed class schedules, and Limited budgets were factors that female teachers believed to be more serious obstacles to game use in the classroom than male teachers did. Experienced teachers, more so than inexperienced teachers, believed that adopting games in teaching was hindered by Inflexibility of curriculum and Negative effects of gaming. On the other hand, inexperienced teachers, more so than experienced teachers, believed that adopting games in teaching is less hindered by Lack of supporting materials and Fixed class schedules.

Fundamentals of Composite Materials for Undergraduate Engineering--A Filmed Presentation. Final Report.

ERIC Educational Resources Information Center

Busching, Herbert W.

Curricula in undergraduate engineering have not adequately reflected present usage and knowledge of composite materials (types of rock and organic matter in which structurally dissimilar materials are combined). Wide usage of composites is expected to increase the importance of this class of materials and the need for more substantive exposure to…

Hyperspectral imaging for differentiation of foreign materials from pinto beans

NASA Astrophysics Data System (ADS)

Mehrubeoglu, Mehrube; Zemlan, Michael; Henry, Sam

2015-09-01

Food safety and quality in packaged products are paramount in the food processing industry. To ensure that packaged products are free of foreign materials, such as debris and pests, unwanted materials mixed with the targeted products must be detected before packaging. A portable hyperspectral imaging system in the visible-to-NIR range has been used to acquire hyperspectral data cubes from pinto beans that have been mixed with foreign matter. Bands and band ratios have been identified as effective features to develop a classification scheme for detection of foreign materials in pinto beans. A support vector machine has been implemented with a quadratic kernel to separate pinto beans and background (Class 1) from all other materials (Class 2) in each scene. After creating a binary classification map for the scene, further analysis of these binary images allows separation of false positives from true positives for proper removal action during packaging.

48 CFR 252.211-7006 - Radio Frequency Identification.

Code of Federal Regulations, 2010 CFR

2010-10-01

... concrete or similar construction materials. (5) Coal or combustibles such as firewood. (6) Agricultural... Class VIII—Medical materials (excluding pharmaceuticals, biologicals, and reagents—suppliers should...

The effectiveness of snow cube throwing learning model based on exploration

NASA Astrophysics Data System (ADS)

Sari, Nenden Mutiara

2017-08-01

This study aimed to know the effectiveness of Snow Cube Throwing (SCT) and Cooperative Model in Exploration-Based Math Learning in terms of the time required to complete the teaching materials and student engagement. This study was quasi-experimental research was conducted at SMPN 5 Cimahi, Indonesia. All student in grade VIII SMPN 5 Cimahi which consists of 382 students is used as population. The sample consists of two classes which had been chosen randomly with purposive sampling. First experiment class consists of 38 students and the second experiment class consists of 38 students. Observation sheet was used to observe the time required to complete the teaching materials and record the number of students involved in each meeting. The data obtained was analyzed by independent sample-t test and used the chart. The results of this study: SCT learning model based on exploration are more effective than cooperative learning models based on exploration in terms of the time required to complete teaching materials based on exploration and student engagement.

Mimicking Heme Enzymes in the Solid State: Metal-Organic Materials with Selectively Encapsulated Heme

DOE Office of Scientific and Technical Information (OSTI.GOV)

Larsen, Randy W; Wojtas, Lukasz; Perman, Jason

2011-06-13

To carry out essential life processes, nature has had to evolve heme enzymes capable of synthesizing and manipulating complex molecules. These proteins perform a plethora of chemical reactions utilizing a single iron porphyrin active site embedded within an evolutionarily designed protein pocket. We herein report the first class of metal–organic materials (MOMs) that mimic heme enzymes in terms of both structure and reactivity. The MOMzyme-1 class is based upon a prototypal MOM, HKUST-1, into which catalytically active metalloporphyrins are selectively encapsulated in a “ship-in-a-bottle” fashion within one of the three nanoscale cages that exist in HKUST-1. MOMs offer unparalleled levelsmore » of permanent porosity and their modular nature affords enormous diversity of structures and properties. The MOMzyme-1 class could therefore represent a new paradigm for heme biomimetic catalysis since it combines the activity of a homogeneous catalyst with the stability and recyclability of heterogeneous catalytic systems within a single material.« less

Mimicking heme enzymes in the solid state: metal-organic materials with selectively encapsulated heme.

PubMed

Larsen, Randy W; Wojtas, Lukasz; Perman, Jason; Musselman, Ronald L; Zaworotko, Michael J; Vetromile, Carissa M

2011-07-13

To carry out essential life processes, nature has had to evolve heme enzymes capable of synthesizing and manipulating complex molecules. These proteins perform a plethora of chemical reactions utilizing a single iron porphyrin active site embedded within an evolutionarily designed protein pocket. We herein report the first class of metal-organic materials (MOMs) that mimic heme enzymes in terms of both structure and reactivity. The MOMzyme-1 class is based upon a prototypal MOM, HKUST-1, into which catalytically active metalloporphyrins are selectively encapsulated in a "ship-in-a-bottle" fashion within one of the three nanoscale cages that exist in HKUST-1. MOMs offer unparalleled levels of permanent porosity and their modular nature affords enormous diversity of structures and properties. The MOMzyme-1 class could therefore represent a new paradigm for heme biomimetic catalysis since it combines the activity of a homogeneous catalyst with the stability and recyclability of heterogeneous catalytic systems within a single material.

Clinical Evaluation of Microhybrid Composite and Glass lonomer Restorative Material in Permanent Teeth.

PubMed

Kharma, Khalil; Zogheib, Tatiana; Bhandi, Shilpa; Mehanna, Carina

2018-02-01

The aim of this study was to clinically compare glass ionomer cement (GIC) with microhybrid composite resin used in class I cavities on permanent teeth over a period of 9 months. A total of 40 teeth with class I cavities were divided into two groups (n = 20) and restored with GIC (EQUIA; GC) and microhybrid resin composite (Amelogen Plus; Ultradent). Restorations were evaluated at ×4.5 magnification using the United States Public Health Service (USPHS) criteria every 3 months. Statistical analysis was performed using the Fisher's exact test (a < 0.05). The data obtained reported no statistical significance difference between both groups in regard to anatomical shape, color, postoperative sensitivity, secondary caries, material handling, adaptation, and marginal staining. The results of this clinical study showed that GIC (EQUIA; GC) can be used for the restoration of permanent teeth and may be more appropriate for certain clinical situations than the resin composite material. EQUIA (GIC) is a viable alternative to resin composite in restoring class I cavities in permanent teeth.

Preparing Students for Class: A Clinical Trial Testing the Efficacy between Multimedia Pre-Lectures and Textbooks in an Economics Course

ERIC Educational Resources Information Center

Vazquez, Jose J.; Chiang, Eric P.

2016-01-01

Motivating students to come prepared to class is often a futile exercise. The consequences are magnified as more instructors adopt the flipped classroom teaching model, in which students are expected to come to class with some knowledge of the material. This paper analyzed the implementation of a pedagogical tool that addresses this problem:…

19 CFR 12.104h - Exempt materials and articles.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 19 Customs Duties 1 2013-04-01 2013-04-01 false Exempt materials and articles. 12.104h Section 12... THE TREASURY SPECIAL CLASSES OF MERCHANDISE Cultural Property § 12.104h Exempt materials and articles... material or any article of cultural property which is imported into the U.S. for temporary exhibition or...

19 CFR 12.104h - Exempt materials and articles.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 19 Customs Duties 1 2010-04-01 2010-04-01 false Exempt materials and articles. 12.104h Section 12... THE TREASURY SPECIAL CLASSES OF MERCHANDISE Cultural Property § 12.104h Exempt materials and articles... material or any article of cultural property which is imported into the U.S. for temporary exhibition or...

19 CFR 12.104h - Exempt materials and articles.

Code of Federal Regulations, 2012 CFR

2012-04-01

... 19 Customs Duties 1 2012-04-01 2012-04-01 false Exempt materials and articles. 12.104h Section 12... THE TREASURY SPECIAL CLASSES OF MERCHANDISE Cultural Property § 12.104h Exempt materials and articles... material or any article of cultural property which is imported into the U.S. for temporary exhibition or...

19 CFR 12.104h - Exempt materials and articles.

Code of Federal Regulations, 2014 CFR

2014-04-01

... 19 Customs Duties 1 2014-04-01 2014-04-01 false Exempt materials and articles. 12.104h Section 12... THE TREASURY SPECIAL CLASSES OF MERCHANDISE Cultural Property § 12.104h Exempt materials and articles... material or any article of cultural property which is imported into the U.S. for temporary exhibition or...

19 CFR 12.104h - Exempt materials and articles.

Code of Federal Regulations, 2011 CFR

2011-04-01

... 19 Customs Duties 1 2011-04-01 2011-04-01 false Exempt materials and articles. 12.104h Section 12... THE TREASURY SPECIAL CLASSES OF MERCHANDISE Cultural Property § 12.104h Exempt materials and articles... material or any article of cultural property which is imported into the U.S. for temporary exhibition or...

49 CFR 179.201-4 - Material.

Code of Federal Regulations, 2013 CFR

2013-10-01

... Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW and 115AW) § 179.201-4 Material. All fittings, tubes, and...

49 CFR 179.201-4 - Material.

Code of Federal Regulations, 2014 CFR

2014-10-01

... Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW and 115AW) § 179.201-4 Material. All fittings, tubes, and...

49 CFR 179.201-4 - Material.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW and 115AW) § 179.201-4 Material. All fittings, tubes, and...

49 CFR 176.5 - Application to vessels.

Code of Federal Regulations, 2013 CFR

2013-10-01

... purpose of carrying flammable or combustible liquid cargo in bulk in its own tanks, when only carrying... (explosive) materials, Class 3 (flammable liquids), or Division 2.1 (flammable gas) materials, in which case... Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY...

49 CFR 176.340 - Combustible liquids in portable tanks.

Code of Federal Regulations, 2014 CFR

2014-10-01

... MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY VESSEL Detailed Requirements for Class 3 (Flammable) and Combustible Liquid Materials § 176.340... 49 Transportation 2 2014-10-01 2014-10-01 false Combustible liquids in portable tanks. 176.340...

49 CFR 176.340 - Combustible liquids in portable tanks.

Code of Federal Regulations, 2010 CFR

2010-10-01

... MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY VESSEL Detailed Requirements for Class 3 (Flammable) and Combustible Liquid Materials § 176.340... 49 Transportation 2 2010-10-01 2010-10-01 false Combustible liquids in portable tanks. 176.340...

49 CFR 176.5 - Application to vessels.

Code of Federal Regulations, 2011 CFR

2011-10-01

... purpose of carrying flammable or combustible liquid cargo in bulk in its own tanks, when only carrying... (explosive) materials, Class 3 (flammable liquids), or Division 2.1 (flammable gas) materials, in which case... Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY...

49 CFR 176.5 - Application to vessels.

Code of Federal Regulations, 2012 CFR

2012-10-01

... purpose of carrying flammable or combustible liquid cargo in bulk in its own tanks, when only carrying... (explosive) materials, Class 3 (flammable liquids), or Division 2.1 (flammable gas) materials, in which case... Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY...

49 CFR 176.340 - Combustible liquids in portable tanks.

Code of Federal Regulations, 2011 CFR

2011-10-01

... MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY VESSEL Detailed Requirements for Class 3 (Flammable) and Combustible Liquid Materials § 176.340... 49 Transportation 2 2011-10-01 2011-10-01 false Combustible liquids in portable tanks. 176.340...

49 CFR 176.5 - Application to vessels.

Code of Federal Regulations, 2014 CFR

2014-10-01

... purpose of carrying flammable or combustible liquid cargo in bulk in its own tanks, when only carrying... (explosive) materials, Class 3 (flammable liquids), or Division 2.1 (flammable gas) materials, in which case... Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY...

49 CFR 176.340 - Combustible liquids in portable tanks.

Code of Federal Regulations, 2012 CFR

2012-10-01

... MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY VESSEL Detailed Requirements for Class 3 (Flammable) and Combustible Liquid Materials § 176.340... 49 Transportation 2 2012-10-01 2012-10-01 false Combustible liquids in portable tanks. 176.340...

49 CFR 176.340 - Combustible liquids in portable tanks.

Code of Federal Regulations, 2013 CFR

2013-10-01

... MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY VESSEL Detailed Requirements for Class 3 (Flammable) and Combustible Liquid Materials § 176.340... 49 Transportation 2 2013-10-01 2013-10-01 false Combustible liquids in portable tanks. 176.340...

49 CFR 176.5 - Application to vessels.

Code of Federal Regulations, 2010 CFR

2010-10-01

... purpose of carrying flammable or combustible liquid cargo in bulk in its own tanks, when only carrying... (explosive) materials, Class 3 (flammable liquids), or Division 2.1 (flammable gas) materials, in which case... Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY...

49 CFR 171.2 - General requirements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... commerce must comply with all applicable requirements of this subchapter, or an exemption or special permit... commerce or transport a hazardous material in commerce unless that person is registered in conformance with... material for transportation in commerce unless the hazardous material is properly classed, described...

49 CFR 397.103 - Requirements for State routing designations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... REGULATIONS TRANSPORTATION OF HAZARDOUS MATERIALS; DRIVING AND PARKING RULES Routing of Class 7 (Radioactive...), 1200 New Jersey Ave., SE., Washington, DC 20590-0001. Attention: National Hazardous Materials Route...

49 CFR 397.103 - Requirements for State routing designations.

Code of Federal Regulations, 2011 CFR

2011-10-01

... REGULATIONS TRANSPORTATION OF HAZARDOUS MATERIALS; DRIVING AND PARKING RULES Routing of Class 7 (Radioactive...), 1200 New Jersey Ave., SE., Washington, DC 20590-0001. Attention: National Hazardous Materials Route...

49 CFR 179.201-4 - Material.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 3 2011-10-01 2011-10-01 false Material. 179.201-4 Section 179.201-4 Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY...-Pressure Tank Car Tanks (Classes DOT-111AW and 115AW) § 179.201-4 Material. All fittings, tubes, and...

Will Being Involved in Calculating Their Own Participation Points Make Middle School Learners Better Class Participants in My Spanish Class?

ERIC Educational Resources Information Center

Cunningham, Lisa

2008-01-01

Middle schoolers are developing skills for learning. Part of those skills is learning how to be an active participant in class and take control over their classroom behavior. Students who are not actively listening or participating are not internally motivated to learn the material. It was my hope that by reflecting upon their participation each…

Organic materials and devices for detecting ionizing radiation

DOEpatents

Doty, F Patrick [Livermore, CA; Chinn, Douglas A [Livermore, CA

2007-03-06

A .pi.-conjugated organic material for detecting ionizing radiation, and particularly for detecting low energy fission neutrons. The .pi.-conjugated materials comprise a class of organic materials whose members are intrinsic semiconducting materials. Included in this class are .pi.-conjugated polymers, polyaromatic hydrocarbon molecules, and quinolates. Because of their high resistivities (.gtoreq.10.sup.9 ohmcm), these .pi.-conjugated organic materials exhibit very low leakage currents. A device for detecting and measuring ionizing radiation can be made by applying an electric field to a layer of the .pi.-conjugated polymer material to measure electron/hole pair formation. A layer of the .pi.-conjugated polymer material can be made by conventional polymer fabrication methods and can be cast into sheets capable of covering large areas. These sheets of polymer radiation detector material can be deposited between flexible electrodes and rolled up to form a radiation detector occupying a small volume but having a large surface area. The semiconducting polymer material can be easily fabricated in layers about 10 .mu.m to 100 .mu.m thick. These thin polymer layers and their associated electrodes can be stacked to form unique multi-layer detector arrangements that occupy small volume.

77 FR 16264 - Manufacturer of Controlled Substances, Notice of Registration; Johnson Matthey Pharmaceutical...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-20

..., Notice of Registration; Johnson Matthey Pharmaceutical Materials Inc. By Notice dated November 18, 2011... Pharmaceutical Materials Inc., Pharmaceutical Service, 25 Patton Road, Devens, Massachusetts 01434, made... Matthey Pharmaceutical Materials Inc. to manufacture the listed basic classes of controlled substances is...

The psychology of social class: How socioeconomic status impacts thought, feelings, and behaviour.

PubMed

Manstead, Antony S R

2018-04-01

Drawing on recent research on the psychology of social class, I argue that the material conditions in which people grow up and live have a lasting impact on their personal and social identities and that this influences both the way they think and feel about their social environment and key aspects of their social behaviour. Relative to middle-class counterparts, lower/working-class individuals are less likely to define themselves in terms of their socioeconomic status and are more likely to have interdependent self-concepts; they are also more inclined to explain social events in situational terms, as a result of having a lower sense of personal control. Working-class people score higher on measures of empathy and are more likely to help others in distress. The widely held view that working-class individuals are more prejudiced towards immigrants and ethnic minorities is shown to be a function of economic threat, in that highly educated people also express prejudice towards these groups when the latter are described as highly educated and therefore pose an economic threat. The fact that middle-class norms of independence prevail in universities and prestigious workplaces makes working-class people less likely to apply for positions in such institutions, less likely to be selected and less likely to stay if selected. In other words, social class differences in identity, cognition, feelings, and behaviour make it less likely that working-class individuals can benefit from educational and occupational opportunities to improve their material circumstances. This means that redistributive policies are needed to break the cycle of deprivation that limits opportunities and threatens social cohesion. © 2018 The Author. British Journal of Social Psychology published by John Wiley & Sons Ltd on behalf of British Psychological Society.

Problems with detection of intakes of very insoluble plutonium

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bihl, D.E.; Lynch, T.P.; Carbaugh, E.H.

1988-08-01

Several human cases involving inhalation of plutonium oxide at Hanford have shown clearance half-times from the lung that are much longer than those recommended for class Y material in Publication 30 of the International Commission on Radiological Protection (ICRP 1979). Because the material is much more tenaciously retained in the lung than ''normal'' class Y material, the Hanford Internal Dosimetry Program has been referring to it as ''super'' class Y. This material poses some major challenges with regard to the design and operation of bioassay monitoring programs. Because of the relative completeness of their data, 10 cases that show lungmore » retention half-times in excess of 5000 days are of particular interest. However, the bioassay data for these cases span the past 30 years and involve various sampling methods and detection limits in vogue at the time. Furthermore, the data were collected for the purpose of determining compliance with regulations in place at the time, rather than for research or modeling of clearance pathways and rates. So from a modeling perspective, the data have gaps, but are sufficiently complete to be convincing. 3 refs., 2 figs., 2 tabs.« less

Microstructural characterization of pressed HMX material sets at differing densities

NASA Astrophysics Data System (ADS)

Molek, C. D.; Welle, E. J.; Wixom, R. R.; Ritchey, M. B.; Samuels, P.; Horie, Y.

2017-01-01

The detonation physics community has embraced the idea that initiation of high explosives (HE) proceeds from an ignition event through subsequent growth to steady detonation. A weakness of all the commonly used ignition and growth models is the microstructural characteristics of the HE are not explicitly incorporated in their ignition and growth terms. This is the case in spite of a demonstrated, but not well-understood, empirical link between particle morphology and initiation of HE. Morphological effects have been parametrically studied in many ways, the majority of efforts focus on establishing a tie between bulk powder metrics and initiation of the pressed beds. More recently, there has been a shift toward characterizing the microstructure of pressed beds in order to understand the underlying mechanisms governing initiation behavior. In this work, we have characterized the microstructures of two HMX classes pressed at three densities using ion bombardment techniques. We find more significant compaction associated with the larger crystalline material - Class 3 - than the smaller fluid energy milled material. The Class 3 material exhibits evidence of crystal cracking. Finally, we discuss this evidence and our attempt to correlate microstructural features to observed changes in continuum level initiation behavior.

49 CFR 173.134 - Class 6, Division 6.2-Definitions and exceptions.

Code of Federal Regulations, 2010 CFR

2010-10-01

... medical waste or clinical waste or (bio) medical waste means a waste or reusable material derived from the... clinical waste or (bio) medical waste containing a Category A infectious substance must be classed as an...

Comparative evaluation of microleakage in Class II restorations using open vs. closed centripetal build-up techniques with different lining materials

PubMed Central

Sawani, Shefali; Arora, Vipin; Jaiswal, Shikha; Nikhil, Vineeta

2014-01-01

Background: Evaluation of microleakage is important for assessing the success of new restorative materials and methods. Aim and Objectives: Comparative evaluation of microleakage in Class II restorations using open vs. closed centripetal build-up techniques with different lining materials. Materials and Methods: Standardized mesi-occlusal (MO) and distoocclusal (DO) Class II tooth preparations were preparedon 53 molars and samples were randomly divided into six experimental groups and one control group for restorations. Group 1: Open-Sandwich technique (OST) with flowable composite at the gingival seat. Group 2: OST with resin-modified glass ionomer cement (RMGIC) at the gingival seat. Group 3: Closed-Sandwich technique (CST) with flowable composite at the pulpal floor and axial wall. Group 4: CST with RMGIC at the pulpal floor and axial wall. Group 5: OST with flowable composite at the pulpal floor, axial wall, and gingival seat. Group 6: OST with RMGIC at the pulpal floor, axial wall, and gingival seat. Group 7: Control — no lining material, centripetal technique only. After restorations and thermocycling, apices were sealed and samples were immersed in 0.5% basic fuchsin dye. Sectioning was followed by stereomicroscopic evaluation. Results: Results were analyzed using Post Hoc Bonferroni test (statistics is not a form of tabulation). Cervical scores of control were more than the exprimental groups (P < 0.05). Less microleakage was observed in CST than OST in all experimental groups (P < 0.05). However, insignificant differences were observed among occlusal scores of different groups (P > 0.05). Conclusion: Class II composite restorations with centripetal build-up alone or when placed with CST reduces the cervical microleakage when compared to OST. PMID:25125847

49 CFR 179.200-19 - Reinforcements, when used, and appurtenances not otherwise specified.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS SPECIFICATIONS FOR TANK CARS Specifications for Non-Pressure Tank Car Tanks (Classes...

A Quasi Experiment to Determine the Effectiveness of a "Partially Flipped" versus "Fully Flipped" Undergraduate Class in Genetics and Evolution.

PubMed

Adams, Alison E M; Garcia, Jocelyn; Traustadóttir, Tinna

2016-01-01

Two sections of Genetics and Evolution were taught by one instructor. One group (the fully flipped section) had the entire class period devoted to active learning (with background material that had to be watched before class), and the other group (the partially flipped section) had just a portion of class time spent on active learning (with the background material presented during class time). The same materials and assessments were used for both sections. Analysis of objective measures revealed that there was no significant difference between the learning outcomes of students in the two sections. There was no main effect of gender, major, or ethnicity on success in the whole cohort or in either section. There appeared to be a significant main effect of class standing, with freshmen performing significantly less well than sophomores, juniors, or seniors (who all performed equally well) in both sections (p < 0.01); however, this was a very preliminary observation, as there were very few freshmen in either section. The only predictor of success in the two sections was prior grade point average. An anonymous end-of-semester survey showed no significant difference between the two sections in interest in the subject matter. © 2016 A.E.M. Adams et al. CBE—Life Sciences Education © 2016 The American Society for Cell Biology. This article is distributed by The American Society for Cell Biology under license from the author(s). It is available to the public under an Attribution–Noncommercial–Share Alike 3.0 Unported Creative Commons License (http://creativecommons.org/licenses/by-nc-sa/3.0).

Time to Confront Willis's Lads with a Ballet Class? A Case Study of Educational Orthodoxy and White Working-Class Boys

ERIC Educational Resources Information Center

Ashley, Martin

2009-01-01

This is a retrospective study tracing the longer term effects on identity and aspiration of white working-class boys from an area of high social deprivation. The boys were members of an acclaimed boys' dance company and have been retrospectively interviewed as young men in their twenties. Documentary and film material dating from the time they…

Distributions and Transformations of Natural Abundance 14C and 13C in Dissolved and Particulate Lipids in a Major Temperate Estuary

NASA Astrophysics Data System (ADS)

Bauer, J. E.; Canuel, E. A.; McIntosh, H.; Barrett, A.; Ferer, E.; Hossler, K.

2013-12-01

Limited previous studies have shown major differences in the natural 14C and 13C isotopic signatures and radiocarbon ages of different biochemical classes (e.g., proteins, carbohydrates, lipid, etc.) in river, estuarine and marine dissolved and particulate organic matter (DOM and POM, respectively). Of particular note are the much greater radiocarbon ages of lipophilic materials than other compound classes. Possible explanations for these findings include greater-than-expected inputs of fossil and highly aged lipid-containing organic matter to rivers and estuaries, extended sorptive-protection of lipophilic materials from degradation and/or lower overall reactivities of lipids vs. other major biochemical classes. We measured the Delta 14C and del 13C signatures and 14C ages of lipid classes in DOM and POM in a major temperate estuary, Delaware Bay (USA) over two years. Changes in DOM were also followed during large volume dark and light incubations to assess the microbial and photochemical reactivity and processing of DOM and lipids. Neutral lipids in DOM were among the most highly aged (> 30,000 yrs BP) of any materials measured in natural waters to date, and were significantly older than co-occurring polar lipids (~4,000-5,000 yrs BP). In general, DOM lipid ages were significantly greater than POM lipid ages across the river-estuary transect, arguing against sorptive protection as the major factor explaining greater ages of lipid than those of other compound classes. Both dark and light incubations of DOM resulted in losses of very highly aged material (30-50,000 y BP), with the remnant exported lipids being correspondingly younger. The microbial and photochemical alterations were most pronounced for lipids from freshwater reaches of the system (i.e., the Delaware River). These findings suggest that a) dissolved vs. particulate lipids have fundamentally different sources and/or physico-chemical partitioning, b) different lipid classes (e.g., neutral vs. polar) derive from uniquely aged sources and/or are processed at dissimilar rates, and c) biological and photochemical alteration and physical mixing during estuarine transport of DOM and POM can result in significant changes to the composition and ages of the exported materials. The implications of these findings for land-to-ocean fluxes of carbon and organic matter and impacts on oceanic DOM and POM are also examined.

Mineralogy and petrography of C asteroid regolith: The Sutter's Mill CM meteorite

NASA Astrophysics Data System (ADS)

Zolensky, Michael; Mikouchi, Takashi; Fries, Marc; Bodnar, Robert; Jenniskens, Peter; Yin, Qing-zhu; Hagiya, Kenji; Ohsumi, Kazumasa; Komatsu, Mutsumi; Colbert, Matthew; Hanna, Romy; Maisano, Jessie; Ketcham, Richard; Kebukawa, Yoko; Nakamura, Tomoki; Matsuoka, Moe; Sasaki, Sho; Tsuchiyama, Akira; Gounelle, Matthieu; Le, Loan; Martinez, James; Ross, Kent; Rahman, Zia

2014-11-01

Based upon our characterization of three separate stones by electron and X-ray beam analyses, computed X-ray microtomography, Raman microspectrometry, and visible-IR spectrometry, Sutter's Mill is a unique regolith breccia consisting mainly of various CM lithologies. Most samples resemble existing available CM2 chondrites, consisting of chondrules and calcium-aluminum-rich inclusion (CAI) set within phyllosilicate-dominated matrix (mainly serpentine), pyrrhotite, pentlandite, tochilinite, and variable amounts of Ca-Mg-Fe carbonates. Some lithologies have witnessed sufficient thermal metamorphism to transform phyllosilicates into fine-grained olivine, tochilinite into troilite, and destroy carbonates. One finely comminuted lithology contains xenolithic materials (enstatite, Fe-Cr phosphides) suggesting impact of a reduced asteroid (E or M class) onto the main Sutter's Mill parent asteroid, which was probably a C class asteroid. One can use Sutter's Mill to help predict what will be found on the surfaces of C class asteroids such as Ceres and the target asteroids of the OSIRIS-REx and Hayabusa 2 sample return missions (which will visit predominantly primitive asteroids). C class asteroid regolith may well contain a mixture of hydrated and thermally dehydrated indigenous materials as well as a significant admixture of exogenous material would be essential to the successful interpretation of mineralogical and bulk compositional data.

The Camera Lens: A Window into the [World]; Film Study and Film Making: Resource Suggestions for the English Class.

ERIC Educational Resources Information Center

Mihalka, Gwendolyn C.; Bolton, Gerre M.

This guide for film study and film making in the secondary English class arranges materials in a sequential order and divides them into four major sections. The section on background information includes: Table of Contents, Design for Use of the Guide, Rationale for the Use of Film Study in the English Class, Objectives for a Film Study and Film…

A Tale of Two Sections: An Experiment to Compare the Effectiveness of a Hybrid versus a Traditional Lecture Format in Introductory Microbiology

PubMed Central

Adams, Alison E. M.; Randall, Shelby; Traustadóttir, Tinna

2015-01-01

Two sections of an introductory microbiology course were taught by one instructor. One was taught through a hybrid format and the other through a traditional format. Students were randomly assigned to the two sections. Both sections were provided with identical lecture materials, in-class worksheets, in-class assessments, and extra credit opportunities; the main difference was in the way the lecture material was delivered—online for the hybrid section and in person for the traditional section. Analysis of final grades revealed that students in the traditional section did significantly better than those in the hybrid section (p < 0.001). There was a significant main effect of class standing (p < 0.01). When performance in the two sections was compared for each class year separately, the differences were only significant for sophomores (p < 0.001); freshmen, juniors, and seniors did not perform differently in the hybrid versus the traditional section. An anonymous midterm survey suggested factors likely contributing to the overall lower success of students in the hybrid section: some students in the hybrid section did not take lecture notes and/or use the audio component of the online lectures, suggesting minimal interaction with the lecture material for these students. PMID:25713096

Modification of the restoration protocol for resin-based composite (RBC) restoratives (conventional and bulk fill) on cuspal movement and microleakage score in molar teeth.

PubMed

Politi, I; McHugh, L E J; Al-Fodeh, R S; Fleming, G J P

2018-05-29

To modify the resin-based composite (RBC) restoration protocol for standardised Class II cavities in third molar teeth restored using conventional RBCs or their bulk fill restorative counterparts. Employing cuspal deflection using a twin channel deflection measuring gauge (during) and microleakage to determine marginal integrity (following) RBC restoration, the modified restoration protocol results were compared with traditional (oblique) restoration of Class II cavities. Thirty-two sound third molar teeth, standardised by size and morphology, were subjected to standardised Class II cavity preparations and randomly allocated to four groups. Restorations were placed in conjunction with a universal bonding system and resin restorative materials were irradiated with a light-emitting-diode light-curing-unit. The cumulative buccal and palatal cuspal movements from a twin channel deflection measuring gauge were summed, the restored teeth fatigued thermally prior to immersion in 0.2% basic fuchsin dye for 24h, before sectioning and examination for microleakage. Teeth restored using conventional RBC materials had significantly higher mean total cuspal movement values compared with bulk fill resin restorative restoration (all p<0.0001). Teeth restored with Admira Fusion and Admira Fusion x-tra had significantly the lowest microleakage scores (all p<0.001) compared with Tetric EvoCeram and Tetric EvoCeram Bulk Fill restored teeth. The microleakage scores for the range of RBC materials tested were significantly reduced (all p<0.001) when the modified RBC restoration protocol was employed compared with the traditional Class II restoration technique. Modification of the RBC restoration protocol of some conventional RBCs and bulk fill resin restoratives significantly improve bond integrity and could be translated as a validation of the limited clinical studies available on bulk fill materials in the dental literature where Class II cavities perform less well than Class I cavities following extended follow-up. The results of the current study add further weight to experimental protocols employing cuspal movement (during) and cervical microleakage (following) RBC restoration of standardised cavities in natural dentition to provide an indication of polymerization shrinkage stress at the tooth/RBC restoration interface in a 'clinically meaningful context'. Copyright © 2018 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.

49 CFR 179.201-1 - Individual specification requirements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS SPECIFICATIONS FOR TANK CARS Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW and 115AW) § 179.201-1...

Using an In-Class Demonstration To Enhance Understanding of Product-Costing Concepts.

ERIC Educational Resources Information Center

James, Marianne L.; Blaszcynski, Carol

2002-01-01

To help accounting students understand product costing, a class demonstration of the transformation of raw materials into finished goods was conducted. A survey of 55 students found the demonstration was highly correlated with enjoyment, concept usefulness, and improved understanding. (SK)

76 FR 9714 - Defense Federal Acquisition Regulation Supplement; Passive Radio Frequency Identification (DFARS...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-22

... materials, including pharmaceuticals (excluding biologicals, and reagents--suppliers should limit the mixing... concrete or similar construction materials. (5) Coal or combustibles such as firewood. (6) Agricultural... Class VIII--Medical materials including pharmaceuticals, (excluding biologicals, and reagents--suppliers...

Auto Mechanics Supplementary Units.

ERIC Educational Resources Information Center

Donovan, Roger; Smith, Sam

This document contains supplemental materials for special needs high school students intended to facilitate their mainstreaming in regular auto mechanics courses. Teacher's materials precede the materials for students and include general notes for the instructor, suggestions, 18 references, a class progress chart, a questionnaire on the usefulness…

Fatigue behavior of AAR Class A railroad wheel steel at ambient and elevated temperatures.

DOT National Transportation Integrated Search

2006-12-01

This report documents a test program to determine the material properties (chemical composition, tensile, and fatigue) at ambient and elevated temperatures of a Class A wheel steel as designated by the Association of American Railroads. The 3 tempera...

Focus on Folklore.

ERIC Educational Resources Information Center

Mullican, James S., Ed.

1977-01-01

This issue of the "Indiana English Journal" is devoted to various facets of folklore. Topics of articles are folklore museums as resource sites for teaching; American folklore and the English classroom; writing about folklore in the freshman English class; some folklore and related materials for composition classes; developing teaching materials…

21 CFR 882.4100 - Ventricular catheter.

Code of Federal Regulations, 2012 CFR

2012-04-01

...) Identification. A ventricular catheter is a device used to gain access to the cavities of the brain for injection of material into, or removal of material from, the brain. (b) Classification. Class II (performance...

21 CFR 882.4100 - Ventricular catheter.

Code of Federal Regulations, 2013 CFR

2013-04-01

...) Identification. A ventricular catheter is a device used to gain access to the cavities of the brain for injection of material into, or removal of material from, the brain. (b) Classification. Class II (performance...

21 CFR 882.4100 - Ventricular catheter.

Code of Federal Regulations, 2011 CFR

2011-04-01

...) Identification. A ventricular catheter is a device used to gain access to the cavities of the brain for injection of material into, or removal of material from, the brain. (b) Classification. Class II (performance...

21 CFR 882.4100 - Ventricular catheter.

Code of Federal Regulations, 2014 CFR

2014-04-01

...) Identification. A ventricular catheter is a device used to gain access to the cavities of the brain for injection of material into, or removal of material from, the brain. (b) Classification. Class II (performance...

21 CFR 882.4100 - Ventricular catheter.

Code of Federal Regulations, 2010 CFR

2010-04-01

...) Identification. A ventricular catheter is a device used to gain access to the cavities of the brain for injection of material into, or removal of material from, the brain. (b) Classification. Class II (performance...

POM Pulses: Characterizing the Physical and Chemical Properties of Particulate Organic Matter (POM) Mobilized by Large Storm Events and its Influence on Receiving Fluvial Systems

NASA Astrophysics Data System (ADS)

Johnson, E. R.; Rowland, R. D.; Protokowicz, J.; Inamdar, S. P.; Kan, J.; Vargas, R.

2016-12-01

Extreme storm events have tremendous erosive energy which is capable of mobilizing vast amounts of material from watershed sources into fluvial systems. This complex mixture of sediment and particulate organic matter (POM) is a nutrient source, and has the potential to impact downstream water quality. The impact of POM on receiving aquatic systems can vary not only by the total amount exported but also by the various sources involved and the particle sizes of POM. This study examines the composition of POM in potential sources and within-event POM by: (1) determining the amount and quality of dissolved organic matter (DOM) that can be leached from coarse, medium and fine particle classes; (2) assessing the C and N content and isotopic character of within-event POM; and (3) coupling physical and chemical properties to evaluate storm event POM influence on stream water. Storm event POM samples and source sediments were collected from a forested headwater catchment (second order stream) in the Piedmont region of Maryland. Samples were sieved into three particle classes - coarse (2mm-1mm), medium (1mm-250µm) and fine (<250µm). Extractions were performed for three particle class sizes and the resulting fluorescent organic matter was analyzed. Carbon (C) and Nitrogen (N) amount, C:N ratio, and isotopic analysis of 13C and 15N were performed on solid state event and source material. Future work will include examination of microbial communities associated with POM particle size classes. Physical size class separation of within-event POM exhibited differences in C:N ratios, δ15N composition, and extracted DOM lability. Smaller size classes exhibited lower C:N ratios, more enriched δ15N and more recalcitrant properties in leached DOM. Source material had varying C:N ratios and contributions to leached DOM. These results indicate that both source and size class strongly influence the POM contribution to fluvial systems during large storm events.

TOPICAL REVIEW: First principles studies of multiferroic materials

NASA Astrophysics Data System (ADS)

Picozzi, Silvia; Ederer, Claude

2009-07-01

Multiferroics, materials where spontaneous long-range magnetic and dipolar orders coexist, represent an attractive class of compounds, which combine rich and fascinating fundamental physics with a technologically appealing potential for applications in the general area of spintronics. Ab initio calculations have significantly contributed to recent progress in this area, by elucidating different mechanisms for multiferroicity and providing essential information on various compounds where these effects are manifestly at play. In particular, here we present examples of density-functional theory investigations for two main classes of materials: (a) multiferroics where ferroelectricity is driven by hybridization or purely structural effects, with BiFeO3 as the prototype material, and (b) multiferroics where ferroelectricity is driven by correlation effects and is strongly linked to electronic degrees of freedom such as spin-, charge-, or orbital-ordering, with rare-earth manganites as prototypes. As for the first class of multiferroics, first principles calculations are shown to provide an accurate qualitative and quantitative description of the physics in BiFeO3, ranging from the prediction of large ferroelectric polarization and weak ferromagnetism, over the effect of epitaxial strain, to the identification of possible scenarios for coupling between ferroelectric and magnetic order. For the second class of multiferroics, ab initio calculations have shown that, in those cases where spin-ordering breaks inversion symmetry (e.g. in antiferromagnetic E-type HoMnO3), the magnetically induced ferroelectric polarization can be as large as a few µC cm-2. The examples presented point the way to several possible avenues for future research: on the technological side, first principles simulations can contribute to a rational materials design, aimed at identifying spintronic materials that exhibit ferromagnetism and ferroelectricity at or above room temperature. On the fundamental side, ab initio approaches can be used to explore new mechanisms for ferroelectricity by exploiting electronic correlations that are at play in transition metal oxides, and by suggesting ways to maximize the strength of these effects as well as the corresponding ordering temperatures.

49 CFR 179.200-23 - Tests of pressure relief valves.

Code of Federal Regulations, 2010 CFR

2010-10-01

... MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS SPECIFICATIONS FOR TANK CARS Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW and 115AW) § 179.200...

Advanced thermionic converter development

NASA Technical Reports Server (NTRS)

Huffman, F. N.; Lieb, D.; Briere, T. R.; Sommer, A. H.; Rufeh, F.

1976-01-01

Recent progress at Thermo Electron in developing advanced thermionic converters is summarized with particular attention paid to the development of electrodes, diodes, and triodes. It is found that one class of materials (ZnO, BaO and SrO) provides interesting cesiated work functions (1.3-1.4 eV) without additional oxygen. The second class of materials studied (rare earth oxides and hexaborides) gives cesiated/oxygenated work functions of less than 1.2 eV. Five techniques of oxygen addition to thermionic converters are discussed. Vapor deposited tungsten oxide collector diodes and the reflux converter are considered.

Stunden-abstract. Einfuhrung un die Unterrichtseinheit "U.S.A." (A Class-hour Abstract. Introduction to the Teaching Unit "U.S.A.")

ERIC Educational Resources Information Center

Keiner, Helmut

1978-01-01

Describes a class hour in a 10th grade class in English, using the teaching unit "USA." Historical and geographical aspects are considered. The aim is to acquire sociological knowledge and to articulate it in English. For each phase of the hour, introductory questions, goals, and materials used are provided. (Text is in German.) (IFS/WGA)

Ensemble learning and model averaging for material identification in hyperspectral imagery

NASA Astrophysics Data System (ADS)

Basener, William F.

2017-05-01

In this paper we present a method for identifying the material contained in a pixel or region of pixels in a hyperspectral image. An identification process can be performed on a spectrum from an image from pixels that has been pre-determined to be of interest, generally comparing the spectrum from the image to spectra in an identification library. The metric for comparison used in this paper a Bayesian probability for each material. This probability can be computed either from Bayes' theorem applied to normal distributions for each library spectrum or using model averaging. Using probabilities has the advantage that the probabilities can be summed over spectra for any material class to obtain a class probability. For example, the probability that the spectrum of interest is a fabric is equal to the sum of all probabilities for fabric spectra in the library. We can do the same to determine the probability for a specific type of fabric, or any level of specificity contained in our library. Probabilities not only tell us which material is most likely, the tell us how confident we can be in the material presence; a probability close to 1 indicates near certainty of the presence of a material in the given class, and a probability close to 0.5 indicates that we cannot know if the material is present at the given level of specificity. This is much more informative than a detection score from a target detection algorithm or a label from a classification algorithm. In this paper we present results in the form of a hierarchical tree with probabilities for each node. We use Forest Radiance imagery with 159 bands.

Geomaterials: their application to environmental remediation

PubMed Central

Yamada, Hirohisa; Tamura, Kenji; Watanabe, Yujiro; Iyi, Nobuo; Morimoto, Kazuya

2011-01-01

Geomaterials are materials inspired by geological systems originating from the billion years long history of the Earth. This article reviews three important classes of geomaterials. The first one is smectites—layered silicates with a cation-exchange capacity. Smectites are useful for removing pollutants and as intercalation compounds, catalysts and polymer nanocomposites. The second class is layered double hydroxides (LDHs). They have an anion-exchange capacity and are used as catalysts, catalyst precursors, sorbents and scavengers for halogens. The third class of geomaterials is zeolites—microporous materials with a cation-exchange capacity which are used for removing harmful cations. Zeolite composites with LDHs can absorb ammonium and phosphate ions in rivers and lakes, whereas zeolite/apatite composites can immobilize the radioactive iodine. These geomaterials are essential for environmental remediation. PMID:27877455

49 CFR 179.201-8 - Sampling device and thermometer well.

Code of Federal Regulations, 2010 CFR

2010-10-01

... MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS SPECIFICATIONS FOR TANK CARS Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW and 115AW) § 179.201-8...

Absenteeism and Undergraduate Exam Performance.

ERIC Educational Resources Information Center

Marburger, Daniel R.

2001-01-01

Investigates the relationship between student absenteeism during a principles of microeconomics course and subsequent performance on examinations. Finds that students who missed class on a given date were significantly more likely to respond incorrectly to questions relating to material covered that day than students who attended class. (RLH)

Concepts first: A course with improved educational outcomes and parity for underrepresented minority groups

NASA Astrophysics Data System (ADS)

Webb, D. J.

2017-08-01

Two active learning physics courses were taught and compared. The "concepts first" course was organized to teach only concepts in the first part of the class, the ultimate goal being to increase students' problem-solving abilities much later in the class. The other course was taught in the same quarter by the same instructor using the same curricular materials, but covered material in the standard (chapter-by-chapter) order. After accounting for incoming student characteristics, students from the concepts-first course scored significantly better in two outcome measures: their grade on the final exam and the grade received in their subsequent physics course. Moreover, in the concepts-first class course, students from groups underrepresented in physics had final exam scores and class grades that were indistinguishable from other students. Finally, students who took at least one concepts-first course in introductory physics were found to have significantly higher rates of graduation with a STEM major than students from this cohort who did not.

Improving students’ creative thinking skill through local material-based experiment (LMBE) on protein qualitative test

NASA Astrophysics Data System (ADS)

Supriyanti, F. M. T.; Halimatul, H. S.

2018-05-01

This study aims to enhance chemistry students’ creative thinking skills using material from local resources on protein qualitative test experiment (LMBE). In this study, a quasi experiment method using one group pretest-postest non-equivalen control group design was carried out on the effectiveness of local material-based experiment approach. The data was collected using the test consists of five assay test and student work sheet (LKM). The effectiveness of the local material-based experiment was tested by means of percentage of normalized gain and score percentage of students’ worksheet. Comparison of creative thinking skills pretest and postest scores showed that the implementation of local material- based experiment (LMBE) enhanced students’s creative thinking skills in experiment class with the value of normalized gain (=0,77) at high category, while in control class reached to =0,44 at medium category. In addition, the LKM shown the enhancements of all aspect of creative thinking skills, including fluency, flexibility, and elaboration skills with the score of in experiment class are 0.79; 0.75; and 0.87 at high category, respectively. In contrast, the only the elaboration skill of control group was improved at high category (=0.76), while fluency and flexibility indicators enhanced at medium category (=0.48 and 0.56, respectively).

49 CFR 173.7 - Government operations and materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... materials offered for transportation by, for, or to the Department of Defense (DOD) of the U.S. Government... Department of Defense (DOD), for the purpose of national security, and which are escorted by personnel... Regulatory Commission. (e) Class 1 (explosive) materials owned by the Department of Defense and packaged...

49 CFR 173.7 - Government operations and materials.

Code of Federal Regulations, 2013 CFR

2013-10-01

... materials offered for transportation by, for, or to the Department of Defense (DOD) of the U.S. Government... Department of Defense (DOD), for the purpose of national security, and which are escorted by personnel... Regulatory Commission. (e) Class 1 (explosive) materials owned by the Department of Defense and packaged...

49 CFR 173.7 - Government operations and materials.

Code of Federal Regulations, 2014 CFR

2014-10-01

... materials offered for transportation by, for, or to the Department of Defense (DOD) of the U.S. Government... Department of Defense (DOD), for the purpose of national security, and which are escorted by personnel... Regulatory Commission. (e) Class 1 (explosive) materials owned by the Department of Defense and packaged...

78 FR 15975 - Manufacturer of Controlled Substances, Notice of Registration; Johnson Matthey, Inc...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-13

..., Notice of Registration; Johnson Matthey, Inc., Pharmaceuticals Materials By Notice dated November 1, 2012...., Pharmaceuticals Materials, 900 River Road, Conshohocken, Pennsylvania 19428, made application by renewal to the...., Pharmaceuticals Materials to manufacture the listed basic classes of controlled substances is consistent with the...

76 FR 56872 - Information Collection Activities

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-14

...- controlled quantity of a Class 7 (radioactive) material; (2) more than 25 kg (55 lbs) of a Division 1.1, 1.2... inhalation in hazard zone A; (4) a shipment of hazardous materials in a bulk packaging with a capacity equal... DEPARTMENT OF TRANSPORTATION Pipeline and Hazardous Materials Safety Administration [Docket No...

Using a dynamic, introductory-level volcanoes class as a means to introduce non-science majors to the geosciences

NASA Astrophysics Data System (ADS)

Cook, G. W.

2012-12-01

At the University of California, San Diego, I teach a quarter-long, introductory Earth Science class titled "Volcanoes," which is, in essence, a functional class in volcanology designed specifically for non-majors. This large-format (enrollment ~ 85), lecture-based class provides students from an assortment of backgrounds an opportunity to acquire much-needed (and sometimes dreaded) area credits in science, while also serving as an introduction to the Earth Science major at UCSD (offered through Scripps Institution of Oceanography). The overall goal of the course is to provide students with a stimulating and exciting general science option that, using an inherently interesting topic, introduces them to the fundamentals of geoscience. A secondary goal is to promote general science and geoscience literacy among the general population of UCSD. Student evaluations of this course unequivocally indicate a high degree of learning and interest in the material. The majority of students in the class (>80%) are non-science majors and very few students (<3%) are Earth science degree-seeking students. In addition, only a handful of students have typically had any form of geology class beyond high school level Earth Science. Consequently, there are challenges associated with teaching the class. Perhaps most significantly, students have very little background—background that is necessary for understanding the processes involved in volcanic eruptions. Second, many non-science students have built-in anxieties with respect to math and science, anxieties that must be considered when designing curriculum and syllabi. It is essential to provide the right balance of technical information while remaining in touch with the audience. My approach to the class involves a dynamic lecture format that incorporates a wide array of multimedia, analogue demonstrations of volcanic processes, and small-group discussions of topics and concepts. In addition to teaching about volcanoes—a fascinating subject in and of itself—I take the opportunity in the first two weeks to introduce students to basic geology, including tectonics, earth materials, surface processes, and geologic time. In fact, this is a vital segment of the class, as the students need this background for the latter portions of the class. A side benefit is that students are provided with a "mini" education in geology whether they know it or not and take this knowledge with them into other classes, and ultimately, their futures. Student satisfaction is uniformly very high with this class. 100% of students agreed that the course material was intellectually stimulating; 95% of students agreed that they learned a great deal from the course; 100% of students stated that they would recommend the class to other students. Overall, the class highlights the role that non-major introductory-level geoscience classes, in particular ones with interesting topics, can serve in educating college-level students about Earth Science. They may also serve as a gateway into the Earth Sciences for students who previously had no such inclination.

Cross-Linking Reactions for the Conversion of Polyphosphazenes into Useful Materials

DTIC Science & Technology

1994-05-18

Characteristics of Polymeric Materials Polymers form one of the largest classes of materials.I Together with ceramics, metals, and a number of inorganic ...the (mainly inorganic ) ceramics, semiconductors, metals, and electro-optical materials. As such, they provide access to combinations of properties that...are not found in any of the classical materials areas. Because the field of inorganic /organic materials is one of the most promising areas for the

49 CFR 179.500-5 - Material.

Code of Federal Regulations, 2013 CFR

2013-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A) § 179.500-5 Material. (a) Tanks shall be made from open-hearth or electric steel of uniform quality. Material shall be free from seams...

49 CFR 179.500-5 - Material.

Code of Federal Regulations, 2012 CFR

2012-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A) § 179.500-5 Material. (a) Tanks shall be made from open-hearth or electric steel of uniform quality. Material shall be free from seams...

49 CFR 179.500-5 - Material.

Code of Federal Regulations, 2014 CFR

2014-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A) § 179.500-5 Material. (a) Tanks shall be made from open-hearth or electric steel of uniform quality. Material shall be free from seams...

49 CFR 179.500-5 - Material.

Code of Federal Regulations, 2011 CFR

2011-10-01

... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A) § 179.500-5 Material. (a) Tanks shall be made from open-hearth or electric steel of uniform quality. Material shall be free from seams...

76 FR 37661 - Notification of Anticipated Delay in Administrative Appeal Decisions

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-28

.... PHMSA-2006-25736) Hazardous Materials; Miscellaneous Packaging Amendments (September 30, 2010; 75 FR... to 49 CFR 173.63(b) and Class 7 (radioactive) material conforming to 49 CFR 173.421 through 173.425... DEPARTMENT OF TRANSPORTATION Pipeline and Hazardous Materials Safety Administration 49 CFR Parts...

12 CFR 268.204 - Class complaints.

Code of Federal Regulations, 2010 CFR

2010-01-01

... agent or representative and must identify the policy or practice adversely affecting the class as well..., Notice of Appeal/Petition. (e) Notification. (1) Within 15 days of receiving notice that the...) Both parties shall furnish to the administrative judge copies of all materials that they wish to be...

49 CFR 179.300-6 - Thickness of plates.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW) § 179.300-6 Thickness of plates. (a) For class DOT...

49 CFR 176.400 - Stowage of Division 1.5, Class 4 (flammable solids) and Class 5 (oxidizers and organic peroxides...

Code of Federal Regulations, 2010 CFR

2010-10-01

... reasonably practicable and be stowed away from all sources of heat and ignition. (b) Division 5.2 (organic peroxide) material must be stowed away from living quarters or access to them. Division 5.2 (organic...

49 CFR 176.800 - General stowage requirements.

Code of Federal Regulations, 2014 CFR

2014-10-01

... protection extending to the sides of the carboy box. This protective construction must be strong enough to permit stacking one on top of the other. (d) A Class 8 (corrosive material) material may not be stowed...

Astronomy in Indian Schools

NASA Astrophysics Data System (ADS)

Bhatia, V. B.

Tradition of astronomy in India goes back to ancient times. Many festivals and rituals are associated with astronomical phenomena. Indian children start learning rudiments of astronomy from primary classes. But primary teachers are not equipped to handle this subject so not much learning actually takes place. The first serious interface with astronomy occurs when children reach class X when they are 15 years old. Till last year astronomy was there in class XII also but it has now been dropped. This is a serious setback for the study of astronomy. In class X astronomy forms part of general science. Since children at this stage are not proficient in physics and mathematics the subject remains descriptive though there are useful activities for children to do. However the teachers are not equipped to handle this subject and there is no help in the form of visual material. So the subject remains neglected. The Indian astronomical community can help by training teachers and providing visual material. It must also urge authorities to reintroduce astronomy in class XII if astronomy is to flourish in India. Moreover India needs to network with developing countries share experiences with them and evolve a strategy that promotes astronomy.

78 FR 14702 - Hazardous Materials: Miscellaneous Petitions for Rulemaking (RRR)

Federal Register 2010, 2011, 2012, 2013, 2014

2013-03-07

... Standard Specification for Polyethylene Plastics Molding and Extrusion Materials to provide a range of acceptable resin tolerances in the plastic drum and IBC material; Allow smokeless powder classed as a... incorporate by reference ASTM Standard 04976-06 without stating that plastic drums and IBCs made from...

Porous Networks Through Colloidal Templates

NASA Astrophysics Data System (ADS)

Li, Qin; Retsch, Markus; Wang, Jianjun; Knoll, Wolfgang; Jonas, Ulrich

Porous networks represent a class of materials with interconnected voids with specific properties concerning adsorption, mass and heat transport, and spatial confinement, which lead to a wide range of applications ranging from oil recovery and water purification to tissue engineering. Porous networks with well-defined, highly ordered structure and periodicities around the wavelength of light can furthermore show very sophisticated optical properties. Such networks can be fabricated from a very large range of materials by infiltration of a sacrificial colloidal crystal template and subsequent removal of the template. The preparation procedures reported in the literature are discussed in this review and the resulting porous networks are presented with respect to the underlying material class. Furthermore, methods for hierarchical superstructure formation and functionalization of the network walls are discussed.

Influence of weight and type of planting material on fruit quality and its heterogeneity in pineapple [Ananas comosus (L.) Merrill].

PubMed

Fassinou Hotegni, V Nicodème; Lommen, Willemien J M; Agbossou, Euloge K; Struik, Paul C

2014-01-01

Cultural practices can affect the quality of pineapple fruits and its variation. The objectives of this study were to investigate (a) effects of weight class and type of planting material on fruit quality, heterogeneity in quality and proportion and yield of fruits meeting European export standards, and (b) the improvement in quality, proportion and yield of fruits meeting export standards when flowering was induced at optimum time. Experiments were conducted in Benin with cvs Sugarloaf (a Perola type) and Smooth Cayenne. In cv. Sugarloaf, experimental factors were weight class of planting material (light, mixed, heavy) and time of flowering induction (farmers', optimum) (Experiment 1). In cv. Smooth Cayenne an additional experimental factor was the type of planting material (hapas, ground suckers, a mixture of the two) (Experiment 2). Fruits from heavy planting material had higher infructescence and fruit weights, longer infructescences, shorter crowns, and smaller crown: infructescence length than fruits from light planting material. The type of planting material in Experiment 2 did not significantly affect fruit quality except crown length: fruits from hapas had shorter crowns than those from ground suckers. Crops from heavy planting material had a higher proportion and yield of fruits meeting export standards than those from other weight classes in Experiment 1 only; also the type of planting material in Experiment 2 did not affect these variates. Heterogeneity in fruit quality was usually not reduced by selecting only light or heavy planting material instead of mixing weights; incidentally the coefficient of variation was significantly reduced in fruits from heavy slips only. Heterogeneity was also not reduced by not mixing hapas and ground suckers. Flowering induction at optimum time increased the proportion and yield of fruits meeting export standards in fruits from light and mixed slip weights and in those from the mixture of heavy hapas plus ground suckers.

Influence of weight and type of planting material on fruit quality and its heterogeneity in pineapple [Ananas comosus (L.) Merrill

PubMed Central

Fassinou Hotegni, V. Nicodème; Lommen, Willemien J. M.; Agbossou, Euloge K.; Struik, Paul C.

2015-01-01

Cultural practices can affect the quality of pineapple fruits and its variation. The objectives of this study were to investigate (a) effects of weight class and type of planting material on fruit quality, heterogeneity in quality and proportion and yield of fruits meeting European export standards, and (b) the improvement in quality, proportion and yield of fruits meeting export standards when flowering was induced at optimum time. Experiments were conducted in Benin with cvs Sugarloaf (a Perola type) and Smooth Cayenne. In cv. Sugarloaf, experimental factors were weight class of planting material (light, mixed, heavy) and time of flowering induction (farmers', optimum) (Experiment 1). In cv. Smooth Cayenne an additional experimental factor was the type of planting material (hapas, ground suckers, a mixture of the two) (Experiment 2). Fruits from heavy planting material had higher infructescence and fruit weights, longer infructescences, shorter crowns, and smaller crown: infructescence length than fruits from light planting material. The type of planting material in Experiment 2 did not significantly affect fruit quality except crown length: fruits from hapas had shorter crowns than those from ground suckers. Crops from heavy planting material had a higher proportion and yield of fruits meeting export standards than those from other weight classes in Experiment 1 only; also the type of planting material in Experiment 2 did not affect these variates. Heterogeneity in fruit quality was usually not reduced by selecting only light or heavy planting material instead of mixing weights; incidentally the coefficient of variation was significantly reduced in fruits from heavy slips only. Heterogeneity was also not reduced by not mixing hapas and ground suckers. Flowering induction at optimum time increased the proportion and yield of fruits meeting export standards in fruits from light and mixed slip weights and in those from the mixture of heavy hapas plus ground suckers. PMID:25653659

Rational design of new electrolyte materials for electrochemical double layer capacitors

NASA Astrophysics Data System (ADS)

Schütter, Christoph; Husch, Tamara; Viswanathan, Venkatasubramanian; Passerini, Stefano; Balducci, Andrea; Korth, Martin

2016-09-01

The development of new electrolytes is a centerpiece of many strategies to improve electrochemical double layer capacitor (EDLC) devices. We present here a computational screening-based rational design approach to find new electrolyte materials. As an example application, the known chemical space of almost 70 million compounds is investigated in search of electrochemically more stable solvents. Cyano esters are identified as especially promising new compound class. Theoretical predictions are validated with subsequent experimental studies on a selected case. These studies show that based on theoretical predictions only, a previously untested, but very well performing compound class was identified. We thus find that our rational design strategy is indeed able to successfully identify completely new materials with substantially improved properties.

49 CFR 179.300-8 - Tank heads.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW) § 179.300-8 Tank heads. (a) Class DOT-110A tanks shall...

49 CFR 179.300-8 - Tank heads.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Transportation Other Regulations Relating to Transportation (Continued) PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) SPECIFICATIONS FOR TANK CARS Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW) § 179.300-8 Tank heads. (a) Class DOT-110A tanks shall...

Boxing It Up-a Cross-curricular Approach.

ERIC Educational Resources Information Center

Till, Wesley

1996-01-01

Reports on a class project that examined the manufacture of boxes and packaging to teach about design and technology. The class discovered basic manufacturing techniques by examining and disassembling cereal boxes. Field trips to stores provided more examples. Appraises the children's final projects and discusses acquiring materials. (MJP)

Evaluation of esthetic parameters of resin-modified glass-ionomer materials and a polyacid-modified resin composite in Class V cervical lesions.

PubMed

Gladys, S; Van Meerbeek, B; Lambrechts, P; Vanherle, G

1999-09-01

The purpose of this study was to compare the esthetics of 3 resin-modified glass-ionomer materials and 1 polyacid-modified resin composite to the esthetics of a conventional glass-ionomer control material. One hundred eighty-seven Class V cervical restorations were observed clinically over 18 months. The esthetic index system that was used evaluated color match, translucency or opacity, and surface roughness. The tested materials behaved very dissimilarly and inconsistently. In general, the esthetic results of the resin-modified glass-ionomer materials and the polyacid-modified resin composite were far from optimal. The esthetic appearance of restorations seriously deteriorated during clinical service, mainly because of discoloration of margins, changes in translucency and opacity, and rapidly appearing roughness or dullness on the surface. Both the resin-modified glass-ionomer materials and the polyacid-modified resin composite evaluated in this study performed better esthetically than did the conventional glass-ionomer material. Indications for these combination materials are limited to areas where esthetics is not a primary concern but where their ease of application may guarantee a more durable functional result.

Analysis of Teaching Materials Developed by Prospective Mathematics Teachers and Their Views on Material Development

ERIC Educational Resources Information Center

Koparan, Timur

2017-01-01

This study aimed at exploring the quality of teaching materials developed by prospective mathematics teachers and their viewpoints on developing teaching materials. It was carried out with 170 prospective teachers from 4 classes in the Fall Semester of 2014-2015 Academic Year. During the first 8 weeks of the 14-week-long study, the theoretical…

Developing Teaching Materials Using Comic Media to Enhance Students’ Mathematical Communication

NASA Astrophysics Data System (ADS)

Yulian, V. N.

2018-04-01

Teaching materials are a set of materials that are arranged systematically written or not, to create an environment or atmosphere that allows students to learn. The purpose of this study is to provide an overview of how the development of teaching materials using comic media that enhance mathematical communication, as well as feasible and effective teaching materials developed. Research method used in this research is Research and Development. In the sense of research contains about how to develop teaching materials through several stages such as validation by experts, as well as revisions. Sources of data used in this study were students and teachers SMK Bandung Barat. The results showed that the teaching materials developed feasible and effective use for students of class X SMK Bandung Barat. Teaching materials received a proper assessment of the experts after going through several stages of revision, in addition to the effective teaching materials used by students seen from the liveliness and the value of classical completeness that reaches more 85% of students. Based on the result of the research, it can be concluded that the developed teaching material gets the proper judgment from the expert, and effectively used in the learning by the students of X-1 Pharmacy class with the classical completeness reach 86% and the student activity is 91,4%.

Updating Classifications of Ceramic Dental Materials: A Guide to Material Selection.

PubMed

McLaren, Edward A; Figueira, Johan

2015-06-01

The indications for and composition of today's dental ceramic materials serve as the basis for determining the appropriate class of ceramics to use for a given case. By understanding the classifications, composition, and characteristics of the latest all-ceramic materials, which are presented in this article in order of most to least conservative, dentists and laboratory technicians can best determine the ideal material for a particular treatment.

EVALUATION OF BACTERIOLOGICAL INDICATORS OF BIOSOLIDS DISINFECTION

EPA Science Inventory

Under the current regulations (CFR 503), Class B biosolids may be land applied with certain site restrictions. One method for achieving Class B status is to raise the pH of the sludge to >12 for a minimum of 2 hours with an alkaline material (normally lime). Alternately, a Clas...

An analysis of the alcohol curriculum used in the driver education program of the Fairfax Alcohol Safety Action project.

DOT National Transportation Integrated Search

1974-01-01

In this study, ten classes of driver education students from two Fairfax County high schools received materials from a new alcohol curriculum in conjunction with regular driver education training. Eight classes of students from two other Fairfax Coun...

Revolution.

ERIC Educational Resources Information Center

Garrahy, Dennis J.

One of a series of social studies units designed to develop the reading and writing skills of low achievers, this student activity book focuses on the theme of revolution. The unit can be used for high school classes, individual study in alternative and continuing high schools, and adult education classes. Following an introduction, material is…

Career Exploration Curriculum Guide. (Prototype).

ERIC Educational Resources Information Center

Great Falls Public Schools, MT.

Materials contained in this curriculum guide include daily lesson plan outlines for an eighteen-week Experience Based Career Education (EBCE) class. Learning experiences are suggested to meet the following major objectives of the class: (1) Develop students' understanding of the role of work in society and the multiple aspects of their career…

Diversified Cooperative Training. A Bibliography.

ERIC Educational Resources Information Center

Florida State Univ., Tallahassee. Center for Instructional Development and Services.

This bibliography describes 52 materials available for use in cooperative education classes and career and guidance counseling. The materials include books, pamphlets, and brochures, films, curriculum guides, study guides, and workbooks. A few are suited for use with special needs students. Materials for inclusion in the bibliography were located…

Home and Family Management. A Bibliography.

ERIC Educational Resources Information Center

Florida State Univ., Tallahassee. Center for Instructional Development and Services.

This bibliography describes 133 materials available for use in home economics classes. The materials include books, pamphlets and brochures, films curriculum guides, study guides, and workbooks. A few are suited for use with special needs students. Materials for inclusion in the bibliography were located through the Florida Educational Information…

An Evaluation of an Inquiry-Based Computer-Assisted Learning Environment.

ERIC Educational Resources Information Center

Maor, Dorit; Fraser, Barry

1994-01-01

This study focused on students' development of inquiry skills in a computerized learning environment. Seven Year-11 classes (n=120) interacted with a computerized database, "Birds of Antarctica," and curriculum materials while the teacher used an inquiry approach to learning. Students perceived their classes as more investigative and…

New class of thermosetting plastics has improved strength, thermal and chemical stability

NASA Technical Reports Server (NTRS)

Burns, E. A.; Dubrow, B.; Lubowitz, H. R.

1967-01-01

New class of thermosetting plastics has high hydrocarbon content, high stiffness, thermal stability, humidity resistance, and workability in the precured state. It is designated cyclized polydiene urethane, and is applicable as matrices to prepare chemically stable ablative materials for rocket nose cones of nozzles.

Digital Ink: In-Class Annotation of PowerPoint Lectures

ERIC Educational Resources Information Center

Johnson, Anne E.

2008-01-01

Digital ink is a tool that, in conjunction with Microsoft PowerPoint software, allows real-time freehand annotation of presentations. Annotation of slides during class encourages student engagement with the material and problems under discussion. Digital ink annotation is a technique suitable for teaching across many disciplines, but is especially…

49 CFR 176.100 - Permit for Divisions 1.1 and 1.2 (explosive) materials.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 49 Transportation 2 2010-10-01 2010-10-01 false Permit for Divisions 1.1 and 1.2 (explosive... CARRIAGE BY VESSEL Detailed Requirements for Class 1 (Explosive) Materials § 176.100 Permit for Divisions 1.1 and 1.2 (explosive) materials. Before Divisions 1.1 and 1.2 (explosive) materials may be...

49 CFR 176.100 - Permit for Divisions 1.1 and 1.2 (explosive) materials.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 2 2011-10-01 2011-10-01 false Permit for Divisions 1.1 and 1.2 (explosive... CARRIAGE BY VESSEL Detailed Requirements for Class 1 (Explosive) Materials § 176.100 Permit for Divisions 1.1 and 1.2 (explosive) materials. Before Divisions 1.1 and 1.2 (explosive) materials may be...

Implementation of InTeGrate Modules into Introductory Courses in the El Paso Higher Education Community

NASA Astrophysics Data System (ADS)

Doser, D. I.; Villalobos, J. I.; Henry, I. E.

2014-12-01

InTeGrate (Interdisciplinary Teaching about Earth for a Sustainable Future) has developed teaching modules that focus on Earth sustainability and Earth-centered societal issues. We have begun to implement modules on climate change, earth materials and freshwater into introductory geology and environmental science courses taught at the University of Texas at El Paso (UTEP), El Paso Community College (EPCC) and local early college high schools (ECHS) for classes of 20 to 220 students. Our eventual goal is to insure students taking introductory classes at any institution will be exposed to comparable content and be similarly prepared for advanced courses. Our initial results suggest that the modules' use of case studies and analysis of authentic data sets are very appealing to our student body (over 70% Hispanic). Since many students do not speak English at home, they were challenged by vocabulary presented in some modules. Modules containing glossaries and extensive background material (such as concept maps and annotated figures) proved very helpful to these students. The use of pre-activity quizzes insured that the students had mastered basic concepts needed for in-class activities. Modifications required to teach these modules in larger classes included condensing materials and reducing the amount of color figures to save paper and printer costs, streamlining dissemination/collection of in-class group assignments, and adapting assignments such as jigsaws and gallery walks to the confines of a large lecture hall with fixed seating. Student reflections indicated students were able to make connections to societal issues and retain these ideas through the end of the courses.

Predicting New Materials for Hydrogen Storage Application

PubMed Central

Vajeeston, Ponniah; Ravindran, Ponniah; Fjellvåg, Helmer

2009-01-01

Knowledge about the ground-state crystal structure is a prerequisite for the rational understanding of solid-state properties of new materials. To act as an efficient energy carrier, hydrogen should be absorbed and desorbed in materials easily and in high quantities. Owing to the complexity in structural arrangements and difficulties involved in establishing hydrogen positions by x-ray diffraction methods, the structural information of hydrides are very limited compared to other classes of materials (like oxides, intermetallics, etc.). This can be overcome by conducting computational simulations combined with selected experimental study which can save environment, money, and man power. The predicting capability of first-principles density functional theory (DFT) is already well recognized and in many cases structural and thermodynamic properties of single/multi component system are predicted. This review will focus on possible new classes of materials those have high hydrogen content, demonstrate the ability of DFT to predict crystal structure, and search for potential meta-stable phases. Stabilization of such meta-stable phases is also discussed.

Proton exchange membrane materials for the advancement of direct methanol fuel-cell technology

DOEpatents

Cornelius, Christopher J [Albuquerque, NM

2006-04-04

A new class of hybrid organic-inorganic materials, and methods of synthesis, that can be used as a proton exchange membrane in a direct methanol fuel cell. In contrast with Nafion.RTM. PEM materials, which have random sulfonation, the new class of materials have ordered sulfonation achieved through self-assembly of alternating polyimide segments of different molecular weights comprising, for example, highly sulfonated hydrophilic PDA-DASA polyimide segment alternating with an unsulfonated hydrophobic 6FDA-DAS polyimide segment. An inorganic phase, e.g., 0.5 5 wt % TEOS, can be incorporated in the sulfonated polyimide copolymer to further improve its properties. The new materials exhibit reduced swelling when exposed to water, increased thermal stability, and decreased O.sub.2 and H.sub.2 gas permeability, while retaining proton conductivities similar to Nafion.RTM.. These improved properties may allow direct methanol fuel cells to operate at higher temperatures and with higher efficiencies due to reduced methanol crossover.

The Flipped Classroom in World History

ERIC Educational Resources Information Center

Gaughan, Judy E.

2014-01-01

The flipped Classroom is one in which lectures are presented as homework outside of class in online videos so that class time is reserved for engaging directly with the materials. This technique offers more personalized guidance and interaction with students, instead of lecturing. In this article, Judy Gaughan details her journey through choosing…

The Jukes-Cantor Model of Molecular Evolution

ERIC Educational Resources Information Center

Erickson, Keith

2010-01-01

The material in this module introduces students to some of the mathematical tools used to examine molecular evolution. This topic is standard fare in many mathematical biology or bioinformatics classes, but could also be suitable for classes in linear algebra or probability. While coursework in matrix algebra, Markov processes, Monte Carlo…

Best Practices for Launching a Flipped Classroom

ERIC Educational Resources Information Center

Hall, Ashley A.; DuFrene, Debbie D.

2016-01-01

Popularity is growing for flipped classroom instruction, which replaces lectures with out-of-class delivery of streaming video, reading materials, online chats, and other modalities. Face-to-face class time is spent on instructor-student and student-student interaction, including small group problem solving and discussion. Classroom flipping has…

Simulations and experiments on gas adsorption in novel microporous polymers

NASA Astrophysics Data System (ADS)

Larsen, Gregory Steven

Microporous materials represent a fascinating class of materials with a broad range of applications. The work presented here focuses on the use of a novel class of microporous material known as polymers of intrinsic micrioporosity, or PIMs, for use in gas separation and storage technologies. The aim of this research is to develop a detailed understanding of the relationship between the monomeric structure and the adsorptive performance of PIMs. First, a generalizable structure generation technique was developed such that simulation samples of PIM-1 recreated experimental densities, scattering, surface areas, pore size distributions, and adsorption isotherms. After validation, the simulations were applied as virtual experiments on several new PIMs with the intent to screen their capabilities as adsorbent materials and elucidate design principles for linear PIMs. The simulations are useful in understanding the unique properties such as pore size distribution and scattering observed experimentally.

Modelling sodium cobaltate by mapping onto magnetic Ising model

NASA Astrophysics Data System (ADS)

Gemperline, Patrick; Morris, David Jonathan Pryce

Fast Ion conductors are a class of crystals that are frequently used as battery materials, especially in smart phones, laptops, and other portable devices. Sodium Cobalt Oxide, NaxCoO2, falls into this class of crystals, but is unique because it possesses the ability to act as a thermoelectric material and a superconductor at different concentrations of Na+. The crystal lattice is mapped onto an Ising Magnetic Spin model and a Monte-Carol Simulation is used to find the most energetically favorable configuration of spins. This spin configuration is mapped back to the crystal lattice resulting in the most stable crystal structure of Sodium Cobalt Oxide at various concentrations. Knowing the atomic structures of the crystals will aid in the research of the materials capabilities and the possible uses of the material commercially. Ohio Supercomputer Center. 1987. Ohio Supercomputer Center. Columbus OH: Ohio Supercomputer Center. and the John Hauck Foundation.

System Architecture of Explorer Class Spaceborne Telescopes: A look at Optimization of Cost, Testability, Risk and Operational Duty Cycle from the Perspective of Primary Mirror Material Selection

NASA Astrophysics Data System (ADS)

Hull, Anthony B.; Westerhoff, Thomas

2015-01-01

Management of cost and risk have become the key enabling elements for compelling science to be done within Explorer or M-Class Missions. We trace how optimal primary mirror selection may be co-optimized with orbit selection. And then trace the cost and risk implications of selecting a low diffusivity low thermal expansion material for low and medium earth orbits, vs. high diffusivity high thermal expansion materials for the same orbits. We will discuss that ZERODUR®, a material that has been in space for over 30 years, is now available as highly lightweighted open-back mirrors, and the attributes of these mirrors in spaceborne optical telescope assemblies. Lightweight ZERODUR® solutions are practical from mirrors < 0.3m in diameter to >4m in diameter. An example of a 1.2m lightweight ZERODUR® mirror will be discussed.

Dental Students' Study Habits in Flipped/Blended Classrooms and Their Association with Active Learning Practices.

PubMed

Gadbury-Amyot, Cynthia C; Redford, Gloria J; Bohaty, Brenda S

2017-12-01

In recognition of the importance for dental education programs to take a student-centered approach in which students are encouraged to take responsibility for their learning, a pediatric dentistry course redesign aimed at promoting greater active and self-directed learning was implemented at one U.S. dental school. The aim of this study was to examine the association between the students' self-reported study habits and active learning practices necessary for meaningful learning in the flipped/blended classroom. A convenience sample of two classes of second-year dental students in spring 2014 (SP14, n=106) and spring 2015 (SP15, n=106) was invited to participate in the study. Of the SP14 students, 84 participated, for a response rate of 79%; of the SP15 students, 94 participated, for a response rate of 87%. Students' self-reported responses to questions about study strategies with the prerecorded lecture materials and assigned reading materials were examined. Non-parametric analyses resulted in a cohort effect, so data are reported by class. In the SP15 class, 72% reported watching all/more than half of the prerecorded lectures versus 62% of the SP14 class, with a majority watching more than one lecture per week. In the SP15 cohort, 68% used active learning strategies when watching the lectures versus 58.3% of the SP14 cohort. The time of day preferred by the majority of both cohorts for interacting with course materials was 7-11 pm. Both SP14 and SP15 students reported being unlikely to read assigned materials prior to coming to class. Overall, the course redesign appeared to engage students in self-directed active learning. However, the degree to which active learning practices were taking place to achieve meaningful learning was questionable given students' self-reported study strategies. More work is needed to examine strategies for promoting study practices that will lead to meaningful learning.

Transfer having a coupling coefficient higher than its active material

NASA Technical Reports Server (NTRS)

Lesieutre, George A. (Inventor); Davis, Christopher L. (Inventor)

2001-01-01

A coupling coefficient is a measure of the effectiveness with which a shape-changing material (or a device employing such a material) converts the energy in an imposed signal to useful mechanical energy. Device coupling coefficients are properties of the device and, although related to the material coupling coefficients, are generally different from them. This invention describes a class of devices wherein the apparent coupling coefficient can, in principle, approach 1.0, corresponding to perfect electromechanical energy conversion. The key feature of this class of devices is the use of destabilizing mechanical pre-loads to counter inherent stiffness. The approach is illustrated for piezoelectric and thermoelectrically actuated devices. The invention provides a way to simultaneously increase both displacement and force, distinguishing it from alternatives such as motion amplification, and allows transducer designers to achieve substantial performance gains for actuator and sensor devices.

Observation of unusual topological surface states in half-Heusler compounds LnPtBi (Ln=Lu, Y)

DOE PAGES

Liu, Z. K.; Yang, L. X.; Wu, S. -C.; ...

2016-09-27

Topological quantum materials represent a new class of matter with both exotic physical phenomena and novel application potentials. Many Heusler compounds, which exhibit rich emergent properties such as unusual magnetism, superconductivity and heavy fermion behaviour, have been predicted to host non-trivial topological electronic structures. The coexistence of topological order and other unusual properties makes Heusler materials ideal platform to search for new topological quantum phases (such as quantum anomalous Hall insulator and topological superconductor). By carrying out angle-resolved photoemission spectroscopy and ab initio calculations on rare-earth half-Heusler compounds LnPtBi (Ln=Lu, Y), we directly observe the unusual topological surface states onmore » these materials, establishing them as first members with non-trivial topological electronic structure in this class of materials. Moreover, as LnPtBi compounds are non-centrosymmetric superconductors, our discovery further highlights them as promising candidates of topological superconductors.« less

Observation of unusual topological surface states in half-Heusler compounds LnPtBi (Ln=Lu, Y)

DOE Office of Scientific and Technical Information (OSTI.GOV)

Liu, Z. K.; Yang, L. X.; Wu, S. -C.

Topological quantum materials represent a new class of matter with both exotic physical phenomena and novel application potentials. Many Heusler compounds, which exhibit rich emergent properties such as unusual magnetism, superconductivity and heavy fermion behaviour, have been predicted to host non-trivial topological electronic structures. The coexistence of topological order and other unusual properties makes Heusler materials ideal platform to search for new topological quantum phases (such as quantum anomalous Hall insulator and topological superconductor). By carrying out angle-resolved photoemission spectroscopy and ab initio calculations on rare-earth half-Heusler compounds LnPtBi (Ln=Lu, Y), we directly observe the unusual topological surface states onmore » these materials, establishing them as first members with non-trivial topological electronic structure in this class of materials. Moreover, as LnPtBi compounds are non-centrosymmetric superconductors, our discovery further highlights them as promising candidates of topological superconductors.« less

Flipped Learning, MOOCs and Learning Analytics: Lessons learnt from a Web Map Design course redesign

NASA Astrophysics Data System (ADS)

Treves, R.

2013-12-01

Five weeks content of a 12 week course in web map design were converted to 'flipped learning': Lecture sessions were replaced by online short video lectures and multiple choice questions to be completed outside class. Class time was taken up with activities and exercises linked to the online learning. Students use of the online content was carefully tracked and detailed student feedback gathered. The response from students was good, 90% of them completed all the out of class activities and their feedback was very positive. The format has the advantage of being easily repurposed as a MOOC or scaled up in other ways. Lessons learnt from the implementation of the materials and the analysis of the VLE logs will be discussed as will ongoing efforts to reuse the materials in a MOOC.

Class C fly ash in pavements.

DOT National Transportation Integrated Search

2010-07-01

Portland cement is the most dominant material used in concrete pavements in the state of Nebraska. In order to improve performance, reduce cost, and advance sustainability, a percentage of the Portland cement is replaced with a recycled material know...