Synthesis of Hydrophobic, Crosslinkable Resins.

DTIC Science & Technology

1984-12-01

insoluble products, in reactions analogous to the preparation of polyimides from polyamic acids . Examples fron7 the recent literature are provided by the...Vilsmeyer formylation,using a secondary amine with formic acid and phosphorous oxychloride [471. d. Probably the most convenient method utilises...such as styrene react with Lewis acids and so the scope for Friedel Crafts reactions is limited. Stilbene and its derivatives may be employed in such

Lithium perchlorate-nitromethane-promoted alkylation of anilines with arylmethanols.

PubMed

Zhou, Jun; Mao, Hai-Feng; Wang, Lu; Zou, Jian-Ping; Zhang, Wei

2011-11-01

A new application of lithium perchlorate-nitromethane (LPNM) for the formation of aromatic C-N and C-C bonds is introduced. LPNM-promoted reactions of anilines with diarylmethanols selectively generate N-alkylated anilines or mono and double Friedel-Crafts alkylation products under different conditions by changing the reaction time, reaction temperature, and the ratio of the reactants. This method does not require the use of transition metal catalysts to prepare alkylated aniline derivatives.

Divergent chemo-, regio-, and diastereoselective normal electron-demand Povarov-type reactions with α-oxo-ketene dienophiles.

PubMed

Galvez, Jaime; Castillo, Juan-Carlos; Quiroga, Jairo; Rajzmann, Michel; Rodriguez, Jean; Coquerel, Yoann

2014-08-15

The reactions between electron-rich 2-aza-dienes and α-oxo-ketenes derived from the Wolff rearrangement of 2-diazocycloalkane-1,3-diones chemo- and regioselectively produced spiro hydropyrid-4-ones with good to excellent diastereoselectivities. These reactions are likely to proceed via a domino Wolff/Friedel-Crafts/intramolecular Mannich process. Prolonged domino sequences also allowed the expeditious preparation of a series of pyrazolopyridine and pyridopyrimidine heterocycles.

Efficient synthesis of isochromanones and isoquinolines via Yb(OTf)3-catalyzed tandem oxirane/aziridine ring opening/Friedel-Crafts cyclization.

PubMed

Wei, Lai; Zhang, Junliang

2012-03-07

The first example of Yb(OTf)(3)-catalyzed tandem ring opening/Friedel-Crafts cyclization of oxiranyl and aziridinyl ketones via selective C-C bond cleavage under mild conditions was developed. Isochromanones and isoquinolines are formed in reasonable yields, which often serve as building blocks for complex chemical synthesis. This journal is © The Royal Society of Chemistry 2012

Portable Electrochemical Oxygen Concentrator for Battlefield Combat Casualty Care.

DTIC Science & Technology

1998-03-01

Spectrometry \\\\ B. Results 12 I. Catalyst Screening 12 a. Au/C and polymeric catalysts 12 b. Oxygen Reduction Catalyzed by Polyamino Phenazine ...be appended to the phenazine ring at the Friedel-Crafts alkylation step at the 4 5 or 7 positions. This specific synthetic pathway leads to an all...by Friedel-Crafts alkylation following reduction of the nitro groups with the amino group at the 2-position of the phenazine ring directing

Synthesis and Characterization of 9-Hydroxyphenalenone Using 2D NMR Techniques

ERIC Educational Resources Information Center

Caes, Benjamin; Jensen, Dell, Jr.

2008-01-01

9-Hydroxyphenalenone is a planar multicyclic [beta]-keto-enol, which is synthesized via a Friedel-Crafts acylation followed by acid-catalyzed intramolecular Michael addition with the loss of a phenyl group in a one-pot reaction during a four-hour lab period. Tautomerization of the [beta]-keto-enol results in C[subscript 2v] symmetry on the NMR…

A novel mesoporous sulfated zirconium solid acid catalyst for Friedel-Crafts benzylation reaction

NASA Astrophysics Data System (ADS)

Miao, Zhichao; Zhou, Jin; Zhao, Jinping; Liu, Dandan; Bi, Xu; Chou, Lingjun; Zhuo, Shuping

2017-07-01

In this paper, a novel mesoporous sulfated zirconium (M-ZrO2/SO42-) has been gotten by one-pot evaporation-induced self-assembly (one-pot EISA) strategy. The SXRD, N2-physisorption and TEM characterization techniques indicated that M-ZrO2/SO42- possessed distinct mesostructure with big specific surface area (133.5 m2 g-1), large pore volume (0.18 cm3 g-1) and narrow pore size distribution (4.90 nm). Moreover, the existing states and the influence in mesostructure of introduced S species were detailedly investigated by the XRD, N2-physisorption, TEM, TG-DSC, FT-IR and XPS techniques and the results showed that the S species, which existed as the type of SO42-, improved the textural properties of prepared materials. In addition, the NH3-TPD and IR spectra of adsorbed pyridine indicated the existence of strong Brønsted and Lewis acid sites in M-ZrO2/SO42- even evacuated at 400 °C. Furthermore, the M-ZrO2/SO42- was used as a promise solid acid catalyst and displayed excellent catalytic performance and reusability in Friedel-Crafts benzylation reaction.

Synthesis and Electronic Properties of Fluoreno[2,1-a]fluorenedione and Fluoreno[1,2-a]fluorenedione.

PubMed

Hacker, Allison S; Pavano, Mauricio; Wood, James E; Immoos, Chad E; Hashimoto, Hannah; Genis, Sam P; Frantz, Derik K

2018-01-05

The [2,1-a]- and [1,2-a]-isomers of fluorenofluorenedione have been synthesized via intramolecular Friedel-Crafts acylations. DFT calculations indicate that the [1,2-a]-isomer adopts a twisted, helical C 2 -symmetric structure and that its protonated form is the thermodynamic product of the Friedel-Crafts acylation in hot sulfuric acid. Absorption spectroscopy and cyclic voltammetry measurements provide experimental estimations of frontier molecular orbital energy levels, which are reported and discussed.

Salen- Zr(IV) complex grafted into amine-tagged MIL-101(Cr) as a robust multifunctional catalyst for biodiesel production and organic transformation reactions

NASA Astrophysics Data System (ADS)

Hassan, Hassan M. A.; Betiha, Mohamed A.; Mohamed, Shaimaa K.; El-Sharkawy, E. A.; Ahmed, Emad A.

2017-08-01

The synthesis of metal-organic frameworks (MOFs), porous coordination polymers with functional groups has received immense interest due to the functional groups can offer desirable properties and allow post-synthetic modification. Herein, for the first time, Zr(IV)-Sal Schiff base complex incorporated into amino-functionalized MIL-101(Cr) framework by salicylaldehyde condensing to amino group, and coordinating Zr(IV) ion have been successfully synthesized. The worthiness of the synthesized material as a catalyst has been examined for the esterification of oleic acid (free fatty acid) with methanol producing biodiesel (methyl oleate), Knoveonagel condensation reaction of aldehydes and Friedel-Crafts acylation of anisole. Our findings demonstrated that Salen-Zr(IV) grafted to framework of NH2-MIL-101(Cr) as a solid acid catalyst exhibited distinct catalytic performance for the production of biodiesel by esterification of oleic acid with methanol, Knoveonagel condensation and Friedel-Crafts acylation. These could be attributed to high surface area which allow high distribution of Zr(IV) species lead to a sufficient contact with the reactants species. Furthermore, the catalyst showed excellent recycling efficiency due to the strong interaction between the Zr(IV) ions and chelating groups in the NH2-MIL-101(Cr)-Sal.

Utilization of acidic α-amino acids as acyl donors: an effective stereo-controllable synthesis of aryl-keto α-amino acids and their derivatives.

PubMed

Wang, Lei; Murai, Yuta; Yoshida, Takuma; Okamoto, Masashi; Tachrim, Zetryana Puteri; Hashidoko, Yasuyuki; Hashimoto, Makoto

2014-05-16

Aryl-keto-containing α-amino acids are of great importance in organic chemistry and biochemistry. They are valuable intermediates for the construction of hydroxyl α-amino acids, nonproteinogenic α-amino acids, as well as other biofunctional components. Friedel-Crafts acylation is an effective method to prepare aryl-keto derivatives. In this review, we summarize the preparation of aryl-keto containing α-amino acids by Friedel-Crafts acylation using acidic α-amino acids as acyl-donors and Lewis acids or Brönsted acids as catalysts.

Enantioselective Synthesis of 2-Amino-1,1-diarylalkanes Bearing a Carbocyclic Ring Substituted Indole through Asymmetric Catalytic Reaction of Hydroxyindoles with Nitroalkenes.

PubMed

Vila, Carlos; Rostoll-Berenguer, Jaume; Sánchez-García, Rubén; Blay, Gonzalo; Fernández, Isabel; Muñoz, M Carmen; Pedro, José R

2018-06-07

An asymmetric catalytic reaction of hydroxyindoles with nitroalkenes leading to the Friedel-Crafts alkylation in the carbocyclic ring of indole is presented. The method is based on the activating/directing effects of the hydroxy group situated in the carbocyclic ring of the indole providing nitroalkylated indoles functionalizated at the C-4, C-5, and C-7 positions with high yield, regio-, and enantioselectivity. The optically enriched nitroalkanes were transformed efficiently in optically enriched 2-amino-1,1-diarylalkanes bearing a carbocyclic ring substituted indole.

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

Zhang, Jinshui; Qiao, Zhenan -An; Mahurin, Shannon Mark

A soft chemistry synthetic strategy based on a Friedel Crafts alkylation reaction is developed for the textural engineering of phenolic resin (PR) with a robust mesoporous framework to avoid serious framework shrinkage and maximize retention of organic functional moieties. By taking advantage of the structural benefits of molecular bridges, the resultant sample maintains a bimodal micro-mesoporous architecture with well-preserved organic functional groups, which is effective for carbon capture. Furthermore, this soft chemistry synthetic protocol can be further extended to nanotexture other aromatic-based polymers with robust frameworks.

A new hypercrosslinked supermicroporous polymer, with scope for sulfonation, and its catalytic potential for the efficient synthesis of biodiesel at room temperature.

PubMed

Bhunia, Subhajit; Banerjee, Biplab; Bhaumik, Asim

2015-03-25

We have designed a new hypercrosslinked supermicroporous polymer (HMP-1) with a BET surface area of 913 m(2) g(-1) by FeCl3 via a catalyzed Friedel-Crafts alkylation reaction between carbazole and α,α'-dibromo-p-xylene. Upon sulfonation HMP-1 yielded a very efficient solid acid catalyst for the production of biodiesels via esterification/transesterification of free fatty acids (FFA)/esters at room temperature.

Hypercrosslinked phenolic polymers with well developed mesoporous frameworks

DOE PAGES

Zhang, Jinshui; Qiao, Zhenan -An; Mahurin, Shannon Mark; ...

2015-02-12

A soft chemistry synthetic strategy based on a Friedel Crafts alkylation reaction is developed for the textural engineering of phenolic resin (PR) with a robust mesoporous framework to avoid serious framework shrinkage and maximize retention of organic functional moieties. By taking advantage of the structural benefits of molecular bridges, the resultant sample maintains a bimodal micro-mesoporous architecture with well-preserved organic functional groups, which is effective for carbon capture. Furthermore, this soft chemistry synthetic protocol can be further extended to nanotexture other aromatic-based polymers with robust frameworks.

Synthesis of some N-substituted indole derivatives and their biological activities.

PubMed

el-Diwani, H; Nakkady, S S; Hishmat, O H; el-Shabrawy, O A; Mahmoud, S S

1992-03-01

Acylation of 2,3-diphenyl-5-methoxy-indole using ethyl chloroformate or chloroacetyl chloride in dimethylformamide and sodium hydride yielded the N-substituted derivatives 1 and 2, respectively. While Friedel-Crafts acylation using chloroacetyl chloride afforded di-4,6-chloroacetyl derivative 3, the reaction of the N-chloroacetyl derivative 2 with amines, hydrazines, urea, semicarbazide hydrochloride, thiophenol, benzimidazole-2-thiol, thiosemicarbazide, 2-mercaptoethanol and thioglycolic acid was studied. Several of the compounds were tested for their effect on arterial blood pressure, antiinflammatory and ulcerogenic activities.

Lignin-based microporous materials as selective adsorbents for carbon dioxide separation.

PubMed

Meng, Qing Bo; Weber, Jens

2014-12-01

Suitable solid adsorbents are demanded for carbon capture and storage (CCS) processes. In this work, a novel microporous polymer is developed by hypercrosslinking of organosolv lignin, which is a renewable resource. Reaction with formaldehyde dimethyl acetal (FDA) via Friedel-Crafts reaction gives microporous networks, with moderate capacity of carbon dioxide but excellent selectivity towards CO2 /N2 mixture as predicted on the basis of ideal adsorption-solution theory (IAST). Pyrolysis of pure organosolv lignin results in microporous carbon powders, while pyrolysis of hypercrosslinked organosolv lignin yields shape-persistent materials with increased CO2 capacity while maintaining very good selectivity. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Recent advances in heterobimetallic catalysis across a "transition metal-tin" motif.

PubMed

Das, Debjit; Mohapatra, Swapna Sarita; Roy, Sujit

2015-06-07

Heterobimetallic catalysts, bearing a metal-metal bond between a transition metal (TM) and a tin atom, are very promising due to their ability in mediating a wide variety of organic transformations. Indeed the utilization of such catalysts is a challenging and evolving area in the field of homogeneous catalysis. Catalysis across a 'TM-Sn' motif is an emerging area in the broader domain of multimetallic catalysis. The present review apprises the chemists' community of the past, present and future scope of this versatile catalytic motif. The TM-Sn catalyzed reactions presented include, among others, Friedel-Crafts alkylation, carbonylation, polymerization, cyclization, olefin metathesis, Heck coupling, hydroarylation Michael addition and tandem coupling. The mechanistic aspects of the reactions have been highlighted as well.

Synthesis of 2'-deoxy-2'-[.sup.18F]fluoro-5-methyl-1-B-D-arabinofuranosyluracil (.sup.18F-FMAU)

DOEpatents

Li, Zibo; Cai, Hancheng; Conti, Peter S

2014-12-16

The present invention relates to methods of synthesizing .sup.18F-FMAU. In particular, .sup.18F-FMAU is synthesized using one-pot reaction conditions in the presence of Friedel-Crafts catalysts. The one-pot reaction conditions are incorporated into a fully automated cGMP-compliant radiosynthesis module, which results in a reduction in synthesis time and simplifies reaction conditions. The one-pot reaction conditions are also suitable for the production of 5-substituted thymidine or cytidine analogs. The products from the one-pot reaction (e.g. the labeled thymidine or cytidine analogs) can be used as probes for imaging tumor proliferative activity. More specifically, these [.sup.18F]-labeled thymidine or cytidine analogs can be used as a PET tracer for certain medical conditions, including, but not limited to, cancer disease, autoimmunity inflammation, and bone marrow transplant.

Friedel-Crafts Acylation: An Experiment Incorporating Spectroscopic Structure Determination.

ERIC Educational Resources Information Center

Schatz, Paul F.

1979-01-01

Describes a laboratory experiment which demonstrates manipulation of highly reactive chemicals, use of a gas trap, and simple and reduced pressure distillation. Student must characterize starting material and product with nuclear magnetic resonance and infrared spectroscopy. (Author/SA)

C-H carbonylation: In situ acyl triflates ace it

NASA Astrophysics Data System (ADS)

Lee, Yong Ho; Morandi, Bill

2018-02-01

A simple palladium catalyst has mediated the facile formation of aroyl triflates -- an extremely reactive class of electrophiles. These intermediates, generated in situ, enable the Friedel-Crafts acylation of traditionally unreactive arenes, addressing a significant gap in C-H carbonylation methodology.

Direct transformation of silyl enol ethers into functionalized allenes.

PubMed

Langer, P; Döring, M; Seyferth, D; Görls, H

2001-02-02

The first elimination reactions of silyl enol ethers to lithiated allenes are reported. These reactions allow a direct transformation of readily available silyl enol ethers into functionalized allenes. The action of three to four equivalents of lithium diisopropylamide (LDA) on silyl enol ethers results in the formation of lithiated allenes by initial allylic lithiation, subsequent elimination of a lithium silanolate, and finally, lithiation of the allene thus formed. Starting with amide-derived silyl imino ethers, lithiated ketenimines are obtained. A variety of reactions of the lithiated allenes with electrophiles (chlorosilanes, trimethylchlorostannane, dimethyl sulfate and ethanol) were carried out. Elimination of silanolate is observed only for substrates that contain the hindered SiMe2tBu or Si(iPr)3 moiety, but not for the SiMe3 group. The reaction of 1,1-dilithio-3,3-diphenylallene with ketones provides a convenient access to novel 1,1-di(hydroxymethyl)allenes which undergo a domino Nazarov-Friedel-Crafts reaction upon treatment with p-toluenesulfonic acid.

New indole, aminoindole and pyranoindole derivatives with anti-inflammatory activity.

PubMed

Nakkady, S S; Fathy, M M; Hishmat, O H; Mahmond, S S; Ebeid, M Y

2000-01-01

6-Methoxy-1-methyl-2,3-diphenyl indol-5-carboxaldehyde (2) was demethylated to give the 6-hydroxy derivative (3) which was cyclized to the pyrano[3,2-f]indole derivatives (4a-d) by the action of ethyl acetoacetate, diethyl malonate, malononitrile, ethyl cyanoacetate. When 4c was boiled in acetic acid, it gave 4d. Reduction of 4c by sodium borohydride yielded the orthoaminonitrile (5). Friedel Craft's acetylation of 1b yielded the 5-acetyl derivative (6), which reacted with hydrazine hydrate, o-toluidine and o-aminophenol to afford (7a-c). Demethylation of (1b) yielded the hydroxyl derivative (8), which differs from compound (9) obtained by demethylation of 6-methoxy-2,3-diphenyl-indole (1a). Friedel Craft's acetylation of 9 gave the 7-acetyl compound (10) which yielded the hydrazone (11). The reaction of primary aromatic amines, (i.e. p-nitroaniline, p-anisidine and p-bromo aniline) with 6-methoxy-1-methyl-2,3-diphenyl-indol-5-carboxaldehyde (2) gave the Schiff bases (12a-c). The latter compounds were reduced by sodium borohydride to yield the corresponding Mannich bases (13a-c). Treatment of 12a-c with thioglycolic acid led to the thiazolidin-4-one-derivatives (14a-c). When (12a-c) reacted with cyanoacetamide, the amino group was replaced by the active methylene to form the cyano compound (15). The structure was confirmed by reacting the carboxaldehyde (2) with cyanoacetamide to yield (15). Pharmacological screening was has been carried out to test the anti-inflammatory activity, ulcerogenecity, effect on the isolated rabbit intestine and the antispasmodic activity.

A general approach to intermolecular carbonylation of arene C-H bonds to ketones through catalytic aroyl triflate formation

NASA Astrophysics Data System (ADS)

Garrison Kinney, R.; Tjutrins, Jevgenijs; Torres, Gerardo M.; Liu, Nina Jiabao; Kulkarni, Omkar; Arndtsen, Bruce A.

2018-02-01

The development of metal-catalysed methods to functionalize inert C-H bonds has become a dominant research theme in the past decade as an approach to efficient synthesis. However, the incorporation of carbon monoxide into such reactions to form valuable ketones has to date proved a challenge, despite its potential as a straightforward and green alternative to Friedel-Crafts reactions. Here we describe a new approach to palladium-catalysed C-H bond functionalization in which carbon monoxide is used to drive the generation of high-energy electrophiles. This offers a method to couple the useful features of metal-catalysed C-H functionalization (stable and available reagents) and electrophilic acylations (broad scope and selectivity), and synthesize ketones simply from aryl iodides, CO and arenes. Notably, the reaction proceeds in an intermolecular fashion, without directing groups and at very low palladium-catalyst loadings. Mechanistic studies show that the reaction proceeds through the catalytic build-up of potent aroyl triflate electrophiles.

Rapid Catalyst Screening by a Continuous-Flow Microreactor Interfaced with Ultra High Pressure Liquid Chromatography

PubMed Central

Fang, Hui; Xiao, Qing; Wu, Fanghui; Floreancig, Paul E.; Weber, Stephen G.

2010-01-01

A high-throughput screening system for homogeneous catalyst discovery has been developed by integrating a continuous-flow capillary-based microreactor with ultra-high pressure liquid chromatography (UHPLC) for fast online analysis. Reactions are conducted in distinct and stable zones in a flow stream that allows for time and temperature regulation. UHPLC detection at high temperature allows high throughput online determination of substrate, product, and byproduct concentrations. We evaluated the efficacies of a series of soluble acid catalysts for an intramolecular Friedel-Crafts addition into an acyliminium ion intermediate within one day and with minimal material investment. The effects of catalyst loading, reaction time, and reaction temperature were also screened. This system exhibited high reproducibility for high-throughput catalyst screening and allowed several acid catalysts for the reaction to be identified. Major side products from the reactions were determined through off-line mass spectrometric detection. Er(OTf)3, the catalyst that showed optimal efficiency in the screening, was shown to be effective at promoting the cyclization reaction on a preparative scale. PMID:20666502

Stereoselective syntheses of four diastereomers of 3,9,12-trihydroxycalamenene via a benzobicyclo[3.3.1] intermediate.

PubMed

Sun, Yongquan; Yu, Binxun; Wang, Xiaolei; Tang, Shibing; She, Xuegong; Pan, Xinfu

2010-06-18

The highly stereoselective syntheses of four diastereomers of natural 3,9,12-trihydroxycalamenene are described. The syntheses highlight the utility of an unusual framework of benzobicyclo[3.3.1] lactones, which were accomplished via an intramolecular Friedel-Crafts-type Michael addition of alpha,beta-unsaturated lactones.

A Mechanistic Investigation of the Gold(III)-Catalyzed Hydrofurylation of C-C Multiple Bonds.

PubMed

Hossein Bagi, Amin; Khaledi, Yousef; Ghari, Hossein; Arndt, Sebastian; Hashmi, A Stephen K; Yates, Brian F; Ariafard, Alireza

2016-11-09

The gold-catalyzed direct functionalization of aromatic C-H bonds has attracted interest for constructing organic compounds which have application in pharmaceuticals, agrochemicals, and other important fields. In the literature, two major mechanisms have been proposed for these catalytic reactions: inner-sphere syn-addition and outer-sphere anti-addition (Friedel-Crafts-type mechanism). In this article, the AuCl 3 -catalyzed hydrofurylation of allenyl ketone, vinyl ketone, ketone, and alcohol substrates is investigated with the aid of density functional theory calculations, and it is found that the corresponding functionalizations are best rationalized in terms of a novel mechanism called "concerted electrophilic ipso-substitution" (CEIS) in which the gold(III)-furyl σ-bond produced by furan auration acts as a nucleophile and attacks the protonated substrate via an outer-sphere mechanism. This unprecedented mechanism needs to be considered as an alternative plausible pathway for gold(III)-catalyzed arene functionalization reactions in future studies.

Friedel-Crafts Crosslinked Highly Sulfonated Polyether Ether Ketone (SPEEK) Membranes for a Vanadium/Air Redox Flow Battery.

PubMed

Merle, Géraldine; Ioana, Filipoi Carmen; Demco, Dan Eugen; Saakes, Michel; Hosseiny, Seyed Schwan

2013-12-30

Highly conductive and low vanadium permeable crosslinked sulfonated poly(ether ether ketone) (cSPEEK) membranes were prepared by electrophilic aromatic substitution for a Vanadium/Air Redox Flow Battery (Vanadium/Air-RFB) application. Membranes were synthesized from ethanol solution and crosslinked under different temperatures with 1,4-benzenedimethanol and ZnCl2 via the Friedel-Crafts crosslinking route. The crosslinking mechanism under different temperatures indicated two crosslinking pathways: (a) crosslinking on the sulfonic acid groups; and (b) crosslinking on the backbone. It was observed that membranes crosslinked at a temperature of 150 °C lead to low proton conductive membranes, whereas an increase in crosslinking temperature and time would lead to high proton conductive membranes. High temperature crosslinking also resulted in an increase in anisotropy and water diffusion. Furthermore, the membranes were investigated for a Vanadium/Air Redox Flow Battery application. Membranes crosslinked at 200 °C for 30 min with a molar ratio between 2:1 (mol repeat unit:mol benzenedimethanol) showed a proton conductivity of 27.9 mS/cm and a 100 times lower VO2+ crossover compared to Nafion.

Synthetic study toward ecteinascidin 743: concise construction of the diazabicyclo[3.3.1]nonane skeleton and assembly of the pentacyclic core.

PubMed

Enomoto, Taro; Yasui, Yoshizumi; Takemoto, Yoshiji

2010-07-16

Synthesis of the pentacyclic core of ecteinascidin 743 is described. This synthesis features concise construction of the diazabicyclo[3.3.1]nonane skeleton using gold(I)-catalyzed one-pot keto amide formation, acid-promoted enamide formation, and oxidative Friedel-Crafts cyclization as the key steps.

Monodisperse microbeads of hypercrosslinked polystyrene for liquid and supercritical fluid chromatography

NASA Astrophysics Data System (ADS)

Tsyurupa, M. P.; Blinnikova, Z. K.; Il'in, M. M.; Davankov, V. A.; Parenago, O. O.; Pokrovskii, O. I.; Usovich, O. I.

2015-11-01

Monodisperse styrene-divinylbenzene (1 wt %) copolymer microbeads are obtained via the elaborate method of high-productivity precipitation polymerization. The crosslinking of this copolymer with chloromethyl methyl ether in the presence of Friedel-Crafts catalyst yields porous hypercrosslinked polymers with degrees of crosslinking that range from 200 to 500%. Microbead sorbents are shown to be suited for selective stationary phases for high-performance liquid chromatography and supercritical fluid chromatography.

Easy access to fully functionalized chiral tetrahydro-β-carboline alkaloids.

PubMed

Arai, Takayoshi; Wasai, Makiko; Yokoyama, Naota

2011-04-15

A four-step synthetic route to fully substituted chiral tetrahydro-β-carbolines (THBCs) is described. Starting from the (R,S,S)-Friedel-Crafts/Henry adduct obtained from three-component coupling of an indole, nitroalkene, and aldehyde catalyzed by imidazoline-aminophenol-CuOTf, the (1S,3S,4R)-THBCs were readily synthesized in a three-step operation including reduction of the nitro-functionality and Pictet-Spengler cyclization.

Research to Significantly Enhance Composite Survivability at 550 F in Oxidative Environments

NASA Technical Reports Server (NTRS)

Byrd, Jim; Guinn, LaToya; Tilley, Kendra; Carson, Laura; Carty, Antoine; Meador, Michael (Technical Monitor)

2001-01-01

Prairie View A&M University using the NASA FAR grant has embarked on several paths to accomplish the initial goals of: (1) synthesizing three ring aromatic diamines to be used as monomers in the synthesis of polyamide resins; and (2) study hydrothermal aging behaviors and glass transition changes of composites synthesized at NASA Glenn Research Center. In establishing the synthesis of the three ring aromatic diamine, it has become necessary to conduct preliminary synthesis to include the nitration of diphenylmethane. The concentration and temperature were altered to assess the effect of purity of isomeric product distribution in such electrophilic aromatic substitution reaction. Products were analyzed using H and C-NMR, Thin Layer Chromatography, High Pressure Liquid Chromatography and GC-Mass Spectrometry (in progress). Results indicate that by varying the concentration of the reaction, a mixture of products can be obtained. Other electrophilic aromatic substitution reactions are also in progress such as Friedel-Craft acylation reaction using diphenylmethane with 4-nitrobenzoyl chloride to afford other diamine products. Furthermore, PVAMU has nearly completed the hydrothermal studies to assess the oxidative stability of DSP443B and DSP442A panels formulated at NASA Glenn Research Center.

Triphenylphosphine-based functional porous polymer as an efficient heterogeneous catalyst for the synthesis of cyclic carbonates from CO2

NASA Astrophysics Data System (ADS)

Wu, Siduo; Teng, Chao; Cai, Sheng; Jiang, Biwang; Wang, Yong; Meng, Hong; Tao, Huchun

2017-11-01

A novel triphenylphosphine-based porous polymer (TPDB) with a high Brunauer-Emmett-Teller (BET) surface area was synthesized through Friedel-Crafts alkylation of triphenylphosphine and α-dibromo- p-xylene. Then, the functional hydroxyl groups were successfully grafted onto the polymer framework by post modification of TPDB with 3-bromo-1-propanol (BP) and triethanolamine (TEA). The resulting sample TPDB-BP-TEA was characterized by various techniques such as FT-IR, TG, SEM, EDS mapping, ICP-MS, and N2 adsorption-desorption. This new polymer was tested as the catalyst in the solvent-free cycloaddition reaction of CO2 with epoxides, which exhibited excellent performance, with high yield, selectivity, and stable recyclability for several catalytic cycles. The comparison experiment results demonstrate that the bromide ions and hydroxyl groups, as well as high surface area, are key factors in improving the catalytic activity of this new catalyst.

Synthesis of permethyldodecaborate and paramagnetic dodecaborate salt

DOEpatents

Hawthorne, M. Frederick; Peymann, Toralf

2002-01-01

The dodecamethyl closo-borane dianion [closo-B.sub.12 (CH.sub.3).sub.12 ].sup.2- and anion [closo-B.sub.12 (CH.sub.3).sub.12 ].sup.- were synthesized and characterized. Dodecamethyl-closo dodecaborate (2-) was produced from [closo-B.sub.12 H.sub.12 ].sup.2-, using trimethylaluminum, and methyl iodide and modified Friedel-Crafts reaction conditions. The anion was produced from the dianion by chemical oxidation using ceric (4) ammonium nitrate in acetonitrile. The anion and dianion were both characterized by .sup.1 H and .sup.11 B NMR spectroscopy, high-resolution fast atom bombardment (FAB) mass spectrometry, cyclic voltammetry, and single-crystal X-ray diffraction. The "camouflaged" polyhedral borane anion [closo-B.sub.12 (CH.sub.3).sub.12 ].sup.2-, can be used as a precursor to materials that offer a broad spectrum of novel applications ranging from drug applications and supramolecular chemistry to use as a weakly-coordinating dianion.

Key factor affecting the structural and textural properties of ZSM-5/MCM-41 composite

NASA Astrophysics Data System (ADS)

Boukoussa, Bouhadjar; Aouad, Nafissa; Hamacha, Rachida; Bengueddach, Abdelkader

2015-03-01

ZSM-5/MCM-41 micro/mesoporous composite materials were synthesized by the hydrothermal technique with alkali-treated ZSM-5 zeolite as source of silica and aluminum and characterized by various physico-chemical techniques such as X-ray diffraction (XRD), nitrogen sorption at 77 K, transmission electronic microscopy (TEM), FTIR spectroscopy and NH3 temperature programmed desorption (TPD) techniques. The effect of concentration of CTAB in the synthesis of these solids has been investigated, the mesopore volume, surface area and surface acidity decrease with increasing the concentration of CTAB. Increasing the CTAB concentration causes the recrystallization of zeolite ZSM-5 and it disadvantage the formation of mesoporous materials MCM-41. The catalytic activity of ZSM-5/MCM-41 materials has been evaluated in the Friedel-Crafts acylation of anisole with benzoyl chloride as alkylating agent. The results revealed the reaction to be influenced by surface area, pore volume and surface acidity.

Synthesis of Benzofuran-2-One Derivatives and Evaluation of Their Antioxidant Capacity by Comparing DPPH Assay and Cyclic Voltammetry.

PubMed

Miceli, Martina; Roma, Elia; Rosa, Paolo; Feroci, Marta; Loreto, M Antonietta; Tofani, Daniela; Gasperi, Tecla

2018-03-21

The present work aimed to synthesise promising antioxidant compounds as a valuable alternative to the currently expensive and easily degradable molecules that are employed as stabilizers in industrial preparation. Taking into account our experience concerning domino Friedel-Crafts/lactonization reactions, we successfully improved and extended the previously reported methodology toward the synthesis of 3,3-disubstituted-3 H -benzofuran-2-one derivatives 9 - 20 starting from polyphenols 1 - 6 as substrates and either diethylketomalonate ( 7 ) or 3,3,3-trifluoromethyl pyruvate ( 8 ) as electrophilic counterpart. The antioxidant capacity of the most stable compounds ( 9 - 11 and 15 - 20 ) was evaluated by both DPPH assay and Cyclic Voltammetry analyses performed in alcoholic media (methanol) as well as in aprotic solvent (acetonitrile). By comparing the recorded experimental data, a remarkable activity can be attributed to few of the tested lactones.

The structure of dimethylallyl tryptophan synthase reveals a common architecture of aromatic prenyltransferases in fungi and bacteria

PubMed Central

Metzger, Ute; Schall, Christoph; Zocher, Georg; Unsöld, Inge; Stec, Edyta; Li, Shu-Ming; Heide, Lutz; Stehle, Thilo

2009-01-01

Ergot alkaloids are toxins and important pharmaceuticals that are produced biotechnologically on an industrial scale. The first committed step of ergot alkaloid biosynthesis is catalyzed by dimethylallyl tryptophan synthase (DMATS; EC 2.5.1.34). Orthologs of DMATS are found in many fungal genomes. We report here the x-ray structure of DMATS, determined at a resolution of 1.76 Å. A complex of DMATS from Aspergillus fumigatus with its aromatic substrate L-tryptophan and with an analogue of its isoprenoid substrate dimethylallyl diphosphate reveals the structural basis of this enzyme-catalyzed Friedel-Crafts reaction, which shows strict regiospecificity for position 4 of the indole nucleus of tryptophan as well as unusual independence of the presence of Mg2+ ions. The 3D structure of DMATS belongs to a rare β/α barrel fold, called prenyltransferase barrel, that was recently discovered in a small group of bacterial enzymes with no sequence similarity to DMATS. These bacterial enzymes catalyze the prenylation of aromatic substrates in the biosynthesis of secondary metabolites (i.e., a reaction similar to that of DMATS). PMID:19706516

Synthesis of marmycin A and investigation into its cellular activity

NASA Astrophysics Data System (ADS)

Cañeque, Tatiana; Gomes, Filipe; Mai, Trang Thi; Maestri, Giovanni; Malacria, Max; Rodriguez, Raphaël

2015-09-01

Anthracyclines such as doxorubicin are used extensively in the treatment of cancers. Anthraquinone-related angucyclines also exhibit antiproliferative properties and have been proposed to operate via similar mechanisms, including direct genome targeting. Here, we report the chemical synthesis of marmycin A and the study of its cellular activity. The aromatic core was constructed by means of a one-pot multistep reaction comprising a regioselective Diels-Alder cycloaddition, and the complex sugar backbone was introduced through a copper-catalysed Ullmann cross-coupling, followed by a challenging Friedel-Crafts cyclization. Remarkably, fluorescence microscopy revealed that marmycin A does not target the nucleus but instead accumulates in lysosomes, thereby promoting cell death independently of genome targeting. Furthermore, a synthetic dimer of marmycin A and the lysosome-targeting agent artesunate exhibited a synergistic activity against the invasive MDA-MB-231 cancer cell line. These findings shed light on the elusive pathways through which anthraquinone derivatives act in cells, pointing towards unanticipated biological and therapeutic applications.

High fluorescence emission of carboxylic acid functionalized polystyrene/BaTiO{sub 3} nanocomposites and rare earth metal complexes: Preparation and characterization

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

Cao, X. T.; Showkat, A. M.; Wang, Z.

2015-03-30

Noble fluorescence nanocomposite compound based on barium titanate nanoparticles (BTO), polystyrene (PSt), and terbium ion (Tb{sup 3+}) was synthesized by a combination of surface-initiated reversible addition-fragmentation chain transfer (RAFT) polymerization, Friedel-Crafts alkylation reaction and coordinate chemistry. Initially, a modification of surface of BTO was conducted by an exchange process with S-benzyl S’-trimethoxysilylpropyltrithiocarbonate to create macro-initiator for polymerization of styrene. Subsequently, aryl carboxylic acid functionalized polystyrene grafted barium titanate (BTO-g-PSt-COOH) was generated by substitution reaction between 4-(Chloromethyl) benzoic acid and PSt chains. The coordination of the nanohybrids with Tb{sup 3+} ions afforded fluorescent Tb{sup 3+} tagged aryl carboxylic acid functionalized polystyrenemore » grafted barium titanate (BTO-g-PSt-Tb{sup 3+}) complexes. Structure, morphology, and fluorescence properties of nanohybrid complexes were investigated by respective physical and spectral studies. FT-IR and SEM analyses confirmed the formation of BTO-g-PSt-Tb{sup 3+}nanohybrids. Furthermore, TGA profiles demonstrated the grafting of aryl carboxylic acid functionalized polystyrene on BTO surface. Optical properties of BTO-g-PSt-Tb{sup 3+} complexes were investigated by fluorescence spectroscopy.« less

Thermally Induced Denitrogenative Annulation for the Synthesis of Dihydroquinolinimines and Chroman-4-imines.

PubMed

Chou, Chih-Hung; Chen, Ying-Yu; Rajagopal, Basker; Tu, Hsiu-Chung; Chen, Kuan-Lin; Wang, Sheng-Fu; Liang, Chien-Fu; Tyan, Yu-Chang; Lin, Po-Chiao

2016-03-04

A rapid growth in synthetic methods for the preparation of diverse organic molecules using N-sulfonyl-1,2,3-triazoles is of great interest in organic synthesis. Transition metals are generally used to activate the α-imino diazo intermediates. Metal-free methods have not been studied in detail, but can be a good complement to transition metal catalysis in the mild reaction conditions. We herein report a novel method for the preparation of 2,3-dihydroquinolin-4-imine and chroman-4-imine analogs from their corresponding N-sulfonyl-1,2,3-triazoles in the absence of metal catalysts. To achieve intramolecular annulation, the introduction of an electron-donating group is required at the meta position of N-sulfonyl-1,2,3-triazole methyl anilines. The inclusion of tailored substituents on the aniline moieties and nitrogen atoms enhances the nucleophilicity of the phenyl π-electrons, thus allowing them to undergo a Friedel-Crafts-type reaction with the highly electrophilic ketenimines. This metal-free method was carefully optimized to generate a variety of dihydroquinolin-4-imines and chroman-4-imines in moderate-to-good yields. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Synthesis of three bromophenols from red algae as PTP1B inhibitors

NASA Astrophysics Data System (ADS)

Guo, Shuju; Li, Jing; Li, Ting; Shi, Dayong; Han, Lijun

2011-01-01

Bromophenols are a set of natural products widely distributed in seaweed, most of which exhibit interesting and useful biological activities. To develop a reliable and efficient synthetic route to these natural bromophenols, three of them, 3,4-dibromo-5-(2'-bromo-3',4'-dihydroxy-6'-methoxymethyl-benzyl)-benzene-1,2-diol (compound 9), 3,4-dibromo-5-(2'-bromo-6'-ethoxy methyl-3',4'-dihydroxybenzyl)-benzene-1,2-diol (compound 10), and 3-bromo-4-(3'-bromo-4',5'-dihydroxy benzyl)-5-(ethoxymethyl)-benzene-1,2-diol (compound 14), isolated from red marine algae, have been synthesized in eight steps with an overall yield of 14.4%, 14.4%, and 18.2% respectively, via a practical approach employing bromination, Wolff-Kishner-Huang reduction and a Friedel-Crafts reaction as key steps. The protein tyrosine phosphatase 1B (PTP1B) inhibitory activities of the synthetic compounds were evaluated by the colorimetric assay. The results show that these compounds are moderate PTP1B inhibitors. The synthesis of these bromophenol derivatives makes in vivo studies of their structure-activity relationships and inhibition activity against PTP1B possible.

Synthesis and characterization of maleimide-functionalized polystyrene-SiO2/TiO2 hybrid nanocomposites by sol-gel process

NASA Astrophysics Data System (ADS)

Ramesh, Sivalingam; Sivasamy, Arumugam; Kim, Joo-Hyung

2012-06-01

Maleimide-functionalized polystyrene (PSMA-SiO2/TiO2) hybrid nanocomposites were prepared by sol-gel reaction starting from tratraethoxysilane (TEOS) and titanium isopropoxide in the solution of polystyrene maleimide in 1,4-dioxane. The hybrid films were obtained by the hydrolysis and polycondensation of TEOS and titanium isopropoxide in maleimide-functionalized polystyrene solution followed by the Michael addition reaction. The transparency of polymer (PSMA-SiO2/TiO2) hybrid was prepared from polystyrene titanium isopropoxide using the γ-aminopropyltriethoxy silane as crosslinking agent by in situ sol-gel process via covalent bonding between the organic-inorganic hybrid nanocomposites. The maleimide-functionalized polystyrene was synthesized by Friedel-Crafts reaction from N-choloromethyl maleimide. The FTIR spectroscopy data conformed the occurrence of Michael addition reaction between the pendant maleimide moieties of the styrene and γ-aminopropyltriethoxysilane. The chemical structure and morphology of PSMA-SiO2/TiO2 hybrid nanocomposites were characterized by FTIR, nuclear magnetic resonance (NMR), 13 C NMR, SEM, XRD, and TEM analyses. The results also indicate that the inorganic particles are much smaller in the ternary systems than in the binary systems; the shape of the inorganic particles and compatibility for maleimide-functionalized polystrene and inorganic moieties are varied with the ratio of the inorganic moieties in the hybrids. Furthermore, TGA and DSC results indicate that the thermal stability of maleimide-functionalized polystyrene was enhanced through the incorporation of the inorganic moieties in the hybrid materials.

Synthesis and biological evaluation of chalcone derivatives (mini review).

PubMed

Bukhari, Syed Nasir Abbas; Jasamai, Malina; Jantan, Ibrahim

2012-11-01

Chalcones are the principal precursors for the biosynthesis of flavonoids and isoflavonoids. A three carbon α, β-unsaturated carbonyl system constitutes chalcones. Chalcones are the condensation products of aromatic aldehyde with acetophenones in attendance of catalyst. They go through an assortment of chemical reactions and are found advantageous in synthesis of pyrazoline, isoxazole and a variety of heterocyclic compounds. In synthesizing a range of therapeutic compounds, chalcones impart key role. They have showed worth mentioning therapeutic efficacy for the treatment of various diseases. Chalcone based derivatives have gained heed since they own simple structures, and diverse pharmacological actions. A lot of methods and schemes have been reported for the synthesis of these compounds. Amongst all, Aldol condensation and Claisen-Schmidt condensation still grasp high up position. Other distinguished techniques include Suzuki reaction, Witting reaction, Friedel-Crafts acylation with cinnamoyl chloride, Photo-Fries rearrangement of phenyl cinnamates etc. These inventive techniques utilize various catalysts and reagents including SOCl(2) natural phosphate, lithium nitrate, amino grafted zeolites, zinc oxide, water, Na(2)CO(3), PEG400, silicasulfuric acid, ZrCl(4) and ionic liquid etc. The development of better techniques for the synthesis of α, β- unsaturated carbonyl compounds is still in high demand. In brief, we have explained the methods and catalysts used in the synthesis of chalcones along with their biological activities in a review form to provide information for the development of new-fangled processes targeting better yield, less reaction time and least side effects with utmost pharmacological properties.

"Just as the Structural Formula Does": Names, Diagrams, and the Structure of Organic Chemistry at the 1892 Geneva Nomenclature Congress.

PubMed

Hepler-Smith, Evan

2015-02-01

At the Geneva Nomenclature Congress of 1892, some of the foremost organic chemists of the late nineteenth century crafted a novel relationship between chemical substances, chemical diagrams, and chemical names that has shaped practices of chemical representation ever since. During the 1880s, the French chemist Charles Friedel organised the nomenclature reform effort that culminated in the Geneva Congress; in the disorderly nomenclature of German synthetic chemistry, Friedel saw an opportunity to advance French national interests and his own pedagogical goals. Friedel and a group of close colleagues reconceived nomenclature as a unified field, in which all chemical names ought to relate clearly to one another and to the structure of the compounds they represented. The German chemist Adolf von Baeyer went a step farther, arguing for names that precisely and uniquely corresponded to the structural formula of each compound, tailored for use in chemical dictionaries and handbooks. Baeyer's vision prevailed at the Geneva Congress, which consequently codified rules for rigorously mapping structural formulas into names, resulting in names that faithfully represented the features of these diagrams but not always the chemical behaviour of the compounds themselves. This approach ultimately limited both the number of chemical compounds that the Geneva rules were able to encompass and the breadth of their application. However, the relationship between diagram and name established at the Geneva Congress became the foundation not only of subsequent systems of chemical nomenclature but of methods of organising information that have supported the modern chemical sciences.

Removal of arsenic from water by Friedel's salt (FS: 3CaO·Al2O3·CaCl2·10H2O).

PubMed

Zhang, Danni; Jia, Yongfeng; Ma, Jiayu; Li, Zhibao

2011-11-15

Low levels of arsenic can be effectively removed from water by adsorption onto various materials and searching for low-cost, high-efficiency new adsorbents has been a hot topic in recent years. In the present study, the performance of Friedel's salt (FS: 3CaO·Al(2)O(3)·CaCl(2)·10H(2)O), a layered double hydroxide (LDHs), as an adsorbent for arsenic removal from aqueous solution was investigated. Friedel's salt was synthesized at lower temperature (50°C) compared to traditional autoclave methods by reaction of calcium chloride with sodium aluminate. Kinetic study revealed that adsorption of arsenate by Friedel's salt was fast in the first 12h and equilibrium was achieved within 48 h. The adsorption kinetics are well described by second-order Lageren equation. The adsorption capacity of the synthesized sorbent for arsenate at pH 4 and 7 calculated from Langmuir adsorption isotherms was 11.85 and 7.80 mg/g, respectively. Phosphate and silicate markedly decreased the removal of arsenate, especially at higher pH, but sulfate was found to suppress arsenate adsorption at lower pH and the adverse effect was disappeared at pH ≥ 6. Common metal cations (Ca(2+), Mg(2+)) enhanced arsenate adsorption. The results suggest that Friedel's salt is a potential cost-effective adsorbent for arsenate removal in water treatment. Copyright © 2011 Elsevier B.V. All rights reserved.

Facile Synthesis of a Pentiptycene-Based Highly Microporous Organic Polymer for Gas Storage and Water Treatment.

PubMed

Luo, Shuangjiang; Zhang, Qinnan; Zhang, Yizhou; Weaver, Kevin P; Phillip, William A; Guo, Ruilan

2018-05-02

Rigid H-shaped pentiptycene units, with an intrinsic hierarchical structure, were employed to fabricate a highly microporous organic polymer sorbent via Friedel-Crafts reaction/polymerization. The obtained microporous polymer exhibits good thermal stability, a high Brunauer-Emmett-Teller surface area of 1604 m 2 g -1 , outstanding CO 2 , H 2 , and CH 4 storage capacities, as well as good adsorption selectivities for the separation of CO 2 /N 2 and CO 2 /CH 4 gas pairs. The CO 2 uptake values reached as high as 5.00 mmol g -1 (1.0 bar and 273 K), which, along with high adsorption selectivity values (e.g., 47.1 for CO 2 /N 2 ), make the pentiptycene-based microporous organic polymer (PMOP) a promising sorbent material for carbon capture from flue gas and natural gas purification. Moreover, the PMOP material displayed superior absorption capacities for organic solvents and dyes. For example, the maximum adsorption capacities for methylene blue and Congo red were 394 and 932 mg g -1 , respectively, promoting the potential of the PMOP as an excellent sorbent for environmental remediation and water treatment.

Adsorption characteristics of (-)-epigallocatechin gallate and caffeine in the extract of waste tea on macroporous adsorption resins functionalized with chloromethyl, amino, and phenylamino groups.

PubMed

Liu, Yongfeng; Bai, Qingqing; Lou, Song; Di, Duolong; Li, Jintian; Guo, Mei

2012-02-15

According to the Friedel-Crafts and amination reaction, a series of macroporous adsorption resins (MARs) with novel structures were synthesized and identified by the Brunauer-Emmett-Teller (BET) method and Fourier transform infrared (FTIR) spectra, and corresponding adsorption behaviors for (-)-epigallocatechin gallate (EGCG) and caffeine (CAF) extracted from waste tea were systemically investigated. Based on evaluation of adsorption kinetics, the kinetic data were well fitted by pseudo-second-order kinetics. Langmuir, Freundlich, Temkin-Pyzhev, and Dubinin-Radushkevich isotherms were selected to illustrate the adsorption process of EGCG and CAF on the MARs. Thermodynamic parameters were adopted to explain in-depth information of inherent energetic changes associated with the adsorption process. The effect of temperature on EGCG and CAF adsorption by D101-3 was further expounded. Van der Waals force, hydrogen bonding, and electrostatic interaction were the main driving forces for the adsorption of EGCG and CAF on the MARs. This study might provide a scientific reference point to aid the industrial large-scale separation and enrichment of EGCG from the extracts of waste tea using modified MARs.

Stability of nicotinate and dodecyl sulfate in a Lewis acidic ionic liquid for aluminum electroplating and characterization of their degradation products.

PubMed

Kosmus, Patrick; Steiner, Oliver; Goessler, Walter; Gollas, Bernhard; Fauler, Gisela

2016-04-01

Plating bath additives are essential for optimization of the morphology of electroplated layers. The ionic liquid 1-ethyl-3-methylimidazolium (EMIM) chloride plus 1.5 mol equivalents of AlCl3 has great potential for electroplating of aluminum. In this study, the chemical and electrochemical stability of the additives EMIM-nicotinate and sodium dodecyl sulfate and their effect on the stability of EMIM was investigated and analyzed. Nicotinate and its electrochemical decomposition product β-picoline could be detected and we show with a single HPLC-UV-MS method that EMIM is not affected by the decomposition of this additive. An adapted standard HPLC-UV-MS method together with GC-MS and ion chromatography was used to analyze the decomposition products of SDS and possible realkylation products of EMIM. Several volatile medium and short chain-length alkanes as well as sulfate ions have been found as decomposition products of SDS. Alkenium ions formed as intermediates during the decomposition of SDS realkylate EMIM to produce mono- up to pentasubstituted alkyl-imidazoles. A reaction pathway involving Wagner-Meerwein rearrangements and Friedel-Crafts alkylations has been suggested to account for the formation of the detected products. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Coupling of carboxylic groups onto the surface of polystyrene parts during fused filament fabrication

NASA Astrophysics Data System (ADS)

Nagel, Jürgen; Zimmermann, Philipp; Schubert, Oliver; Simon, Frank; Schlenstedt, Kornelia

2017-11-01

A method for the fabrication of polystyrene parts, modified with carboxylic groups during Fused Filament Fabrication (FFF), is being introduced. This method is based on the application of a thin layer of a reactive polymer carrying carboxylic groups on a substrate surface. A polystyrene film is printed on top of this layer. During contact between the hot melt and the reactive layer, a Friedel-Crafts type acylation using a green catalyst takes place, which attaches the reactive polymer to the polystyrene surface. The modified surface is homogeneous, hydrophilic and able to bind copper ions. The method could be used to fabricate unique parts of polystyrene with tailored surface functionalisation. It could be applied for laboratory use, e.g. for the manufacture of lab-on-a-chip devices.

Tunable Oleo-Furan Surfactants by Acylation of Renewable Furans

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

Park, Dae Sung; Joseph, Kristeen E.; Koehle, Maura

2016-11-23

An important advance in fluid surface control was the amphiphilic surfactant comprised of coupled molecular structures (i.e. hydrophilic and hydrophobic) to reduce surface tension between two distinct fluid phases. However, implementation of simple surfactants has been hindered by the broad range of applications in water containing alkaline earth metals (i.e. hard water), which disrupt surfactant function and require extensive use of undesirable and expensive chelating additives. Here we show that sugar-derived furans can be linked with triglyceride-derived fatty acid chains via Friedel-Crafts acylation within single layer (SPP) zeolite catalysts. These alkylfuran surfactants independently suppress the effects of hard water whilemore » simultaneously permitting broad tunability of size, structure, and function, which can be optimized for superior capability for forming micelles and solubilizing in water.« less

Easy synthesis of hierarchical carbon spheres with superior capacitive performance in supercapacitors.

PubMed

Huang, Xinhua; Kim, Seok; Heo, Min Seon; Kim, Ji Eun; Suh, Hongsuk; Kim, Il

2013-10-01

An easy template-free approach to the fabrication of pure carbon microspheres has been achieved via direct pyrolysis of as-prepared polyaromatic hydrocarbons including polynaphthalene and polypyrene. The polyaromatics were synthesized from aromatic hydrocarbons (AHCs) using anhydrous zinc chloride as the Friedel-Crafts catalyst and chloromethyl methyl ether as a cross-linker. The experimental results show that the methylene bridges between phenyl rings generate a hierarchical porous polyaromatic precursor to form three-dimensionally (3D) interconnected micro-, meso-, and macroporous networks during carbonization. These hierarchical porous carbon aggregates of spherical carbon spheres exhibit faster ion transport/diffusion behavior and increased surface area usage in electric double-layer capacitors. Furthermore, micropores are present in the 3D interconnected network inside the cross-linked AHC-based carbon microspheres, thus imparting an exceptionally large, electrochemically accessible surface area for charge accumulation.

Putting corannulene in its place. Reactivity studies comparing corannulene with other aromatic hydrocarbons.

PubMed

George, Stephen R D; Frith, Thomas D H; Thomas, Donald S; Harper, Jason B

2015-09-14

A series of aromatic hydrocarbons were investigated so as to compare the reactivity of corannulene with planar aromatic hydrocarbons. Corannulene was found to be more reactive than benzene, naphthalene and triphenylene to Friedel-Crafts acylation whilst electrophilic aromatic bromination was also used to confirm that triphenylene was less reactive than corannulene and that pyrene, perylene and acenaphthene were more so. The stabilisation of a neighbouring carbocation by the various aromatic systems was investigated through consideration of the rates of methanolysis of a series of benzylic alcohols. The reactivity series was found to parallel that observed for the electrophilic aromatic substitutions and both series are supported by computational studies. As such, a reactivity scale was devised that showed that corannulene was less reactive than would be expected for an aromatic planar species of similar pi electron count.

Microporous Organic Polymers Based on Hyper-Crosslinked Coal Tar: Preparation and Application for Gas Adsorption.

PubMed

Gao, Hui; Ding, Lei; Bai, Hua; Li, Lei

2017-02-08

Hyper-crosslinked polymers (HCPs) are promising materials for gas capture and storage, but high cost and complicated preparation limit their practical application. In this paper, a new type of HCPs (CTHPs) was synthesized through a one-step mild Friedel-Crafts reaction with low-cost coal tar as the starting material. Chloroform was utilized as both solvent and crosslinker to generate a three-dimensional crosslinked network with abundant micropores. The maximum BET surface area of the prepared CTHPs could reach up to 929 m 2  g -1 . Owing to the high affinity between the heteroatoms on the coal-tar building blocks and the CO 2 molecules, the adsorption capacity of CTHPs towards CO 2 reached up to 14.2 wt % (1.0 bar, 273 K) with a high selectivity (CO 2 /N 2 =32.3). Furthermore, the obtained CTHPs could adsorb 1.27 wt % H 2 at 1.0 bar and 77.3 K, and also showed capacity for the capture of high organic vapors at room temperature. In comparison with other reported porous organic polymers, CTHPs have the advantages of low-cost, easy preparation, and high gas-adsorption performance, making them suitable for mass production and practical use in the future. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Menadione.

PubMed

Hassan, Ghada S

2013-01-01

This chapter includes the aspects of Menadione (vitamin K). The drug is synthesized by the use of itaconic acid obtained through Friedel-Craft condensation or by direct oxidation of the 2-methyl-1,4-naphthquinone. Vitamin K generally maintains healthy blood clotting and prevents excessive bleeding and hemorrhage, it is also important for maintaining healthy bone structure and for carbohydrate storage in the body. In addition, it is given to newborn babies born in hospitals to prevent the development of life-threatening bleeding caused by low prothrombin levels. The chapter discusses the drug metabolism and pharmacokinetics and presents various method of analysis of this drug such as compendial tests, electrochemical analysis, spectroscopic analysis, and chromatographic techniques of separation. It also discusses its physical properties such as solubility characteristics, X-ray powder diffraction pattern, and thermal methods of analysis. The chapter is concluded with a discussion on its biological properties such as activity, toxicity, and safety. Copyright © 2013 Elsevier Inc. All rights reserved.

Synthesis, anticancer activity, and iron affinity of the Actinoplanes metabolite 7,8-dihydroxy-1-methylnaphtho[2,3-c]furan-4,9-dione.

PubMed

Breyer, Sandra; Effenberger-Neidnicht, Katharina; Knauer, Sebastian; Schobert, Rainer

2011-02-01

The first synthesis of 7,8-dihydroxy-1-methylnaphtho[2,3-c]furan-4,9-dione (1), an isofuranonaphthoquinone produced by an Actinoplanes strain is described. Lactone ring opening of 6-methylfuro[3,4-c]furan-1(3H)-one (4) with ortho-lithiated veratrole (3), oxidation of product alcohol 5, and Friedel-Crafts acylation of the resulting aroylcarboxylic acid 7 afforded the mono methyl ether 2 of the target compound. The latter was obtained by demethylation of 2 with BBr(3) in 14% overall yield. While mono ether 2 was distinctly more cytotoxic than catechol 1 against a panel of five cancer cell lines, only the latter showed a siderophore-like binding affinity for Fe(III) with a complex dissociation constant K(D) of approximately 10(-29) M(3) (pM = 25.9). Copyright © 2010 Elsevier Ltd. All rights reserved.

Symmetrical and unsymmetrical pincer complexes with group 10 metals: synthesis via aryl C-H activation and some catalytic applications.

PubMed

Niu, Jun-Long; Hao, Xin-Qi; Gong, Jun-Fang; Song, Mao-Ping

2011-05-21

Aryl-based pincer metal complexes with anionic terdentate ligands have been widely applied in organic synthesis, organometallic catalysis and other related areas. Synthetically, the most simple and convenient method for the construction of these complexes is the direct metal-induced C(aryl)-H bond activation, which can be fulfilled by choosing the appropriate functional donor groups in the two side arms of the aryl-based pincer preligands. In this perspective, we wish to summarize some results achieved by our group in this context. Successful examples include symmetrical chiral bis(imidazoline) NCN pincer complexes with Ni(II), Pd(II) and Pt(II), bis(phosphinite) and bis(phosphoramidite) PCP pincer Pd(II) complexes, unsymmetrical (pyrazolyl)phosphinite, (amino)phosphinite and (imino)phosphinite PCN pincer Pd(II) complexes, chiral (imidazolinyl)phosphinite and (imidazolinyl)phosphoramidite PCN pincer complexes with Ni(II) and Pd(II) as well as unsymmetrical (oxazolinyl)amine and (oxazolinyl)pyrazole NCN' pincer Pd(II) complexes. Among them, the P-donor containing complexes are efficiently synthesized by the "one-pot phosphorylation/metalation" method. The obtained symmetrical and unsymmetrical pincer complexes have been used as catalysts in Suzuki-Miyaura reaction (Pd), asymmetric Friedel-Crafts alkylation of indole with trans-β-nitrostyrene (Pt) as well as in asymmetric allylation of aldehyde and sulfonimine (Pd). In the Suzuki couplings conducted at 40-50 °C, some unsymmetrical Pd complexes exhibit much higher activity than the related symmetrical ones which can be attributed to their faster release of active Pd(0) species resulting from the hemilabile coordination of the ligands. Literature results on the synthesis of some related pincer complexes as well as their activities in the above catalytic reactions are also presented.

Stabilization of chromium-bearing electroplating sludge with MSWI fly ash-based Friedel matrices.

PubMed

Qian, Guangren; Yang, Xiaoyan; Dong, Shixiang; Zhou, Jizhi; Sun, Ying; Xu, Yunfeng; Liu, Qiang

2009-06-15

This work investigated the feasibility and effectiveness of MSWI fly ash-based Friedel matrices on stabilizing/solidifying industrial chromium-bearing electroplating sludge using MSWI fly ash as the main raw material with a small addition of active aluminum. The compressive strength, leaching behavior and chemical speciation of heavy metals and hydration phases of matrices were characterized by TCLP, XRD, FTIR and other experimental methods. The results revealed that MSWI fly ash-based Friedel matrices could effectively stabilize chromium-bearing electroplating sludge, the formed ettringite and Friedel phases played a significant role in the fixation of heavy metals in electroplating sludge. The co-disposal of chromium-bearing electroplating sludge and MSWI fly ash-based Friedel matrices with a small addition of active aluminum is promising to be an effective way of stabilizing chromium-bearing electroplating sludge.

Detecting Friedel oscillations in ultracold Fermi gases

NASA Astrophysics Data System (ADS)

Riechers, Keno; Hueck, Klaus; Luick, Niclas; Lompe, Thomas; Moritz, Henning

2017-09-01

Investigating Friedel oscillations in ultracold gases would complement the studies performed on solid state samples with scanning-tunneling microscopes. In atomic quantum gases interactions and external potentials can be tuned freely and the inherently slower dynamics allow to access non-equilibrium dynamics following a potential or interaction quench. Here, we examine how Friedel oscillations can be observed in current ultracold gas experiments under realistic conditions. To this aim we numerically calculate the amplitude of the Friedel oscillations which are induced by a potential barrier in a 1D Fermi gas and compare it to the expected atomic and photonic shot noise in a density measurement. We find that to detect Friedel oscillations the signal from several thousand one-dimensional systems has to be averaged. However, as up to 100 parallel one-dimensional systems can be prepared in a single run with present experiments, averaging over about 100 images is sufficient.

Hydroquinone and Quinone-Grafted Porous Carbons for Highly Selective CO2 Capture from Flue Gases and Natural Gas Upgrading.

PubMed

Wang, Jun; Krishna, Rajamani; Yang, Jiangfeng; Deng, Shuguang

2015-08-04

Hydroquinone and quinone functional groups were grafted onto a hierarchical porous carbon framework via the Friedel-Crafts reaction to develop more efficient adsorbents for the selective capture and removal of carbon dioxide from flue gases and natural gas. The oxygen-doped porous carbons were characterized with scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, Fourier transform infrared spectroscopy, and Raman spectroscopy. CO2, CH4, and N2 adsorption isotherms were measured and correlated with the Langmuir model. An ideal adsorbed solution theory (IAST) selectivity for the CO2/N2 separation of 26.5 (298 K, 1 atm) was obtained on the hydroquinone-grafted carbon, which is 58.7% higher than that of the pristine porous carbon, and a CO2/CH4 selectivity value of 4.6 (298 K, 1 atm) was obtained on the quinone-grafted carbon (OAC-2), which represents a 28.4% improvement over the pristine porous carbon. The highest CO2 adsorption capacity on the oxygen-doped carbon adsorbents is 3.46 mmol g(-1) at 298 K and 1 atm. In addition, transient breakthrough simulations for CO2/CH4/N2 mixture separation were conducted to demonstrate the good separation performance of the oxygen-doped carbons in fixed bed adsorbers. Combining excellent adsorption separation properties and low heats of adsorption, the oxygen-doped carbons developed in this work appear to be very promising for flue gas treatment and natural gas upgrading.

Fe(OTf)3-catalysed Friedel–Crafts reaction of benzenoid arenes with α,β-unsaturated carbonyl compounds: easy access to 1,1-diarylalkanes

PubMed Central

Bhattacharya, Aditya; Shukla, Pushpendra Mani

2017-01-01

A simple and efficient method for the synthesis of 1,1-diarylalkanes via the Friedel–Crafts-type alkylation reaction of electron-rich arenes with cinnamic acid ester derivatives or chalcones is reported. Iron triflate has been found to be the best catalyst for the Friedel–Crafts-type alkylation reaction with α,β-unsaturated carbonyl compounds. This reaction afforded β,β-diaryl carbonyl compounds in good yields (65–93%) and with excellent regioselectivities. Remarkably, this method is also compatible with a variety of indoles to provide 3-indolyl-aryl carbonyl compounds in excellent yields. Great efforts have been made to deduce a plausible reaction mechanism based on isotopic labelling experiments. PMID:29134078

One-pot synthesis of MWW zeolite nanosheets using a rationally designed organic structure-directing agent

DOE PAGES

Luo, Helen Y.; Michaelis, Vladimir K.; Hodges, Sydney; ...

2015-07-22

A new material MIT-1 comprised of delaminated MWW zeolite nanosheets is synthesized in one-pot using a rationally designed organic structure-directing agent (OSDA). The OSDA is comprised of a hydrophilic head segment that resembles the OSDA used to synthesize the zeolite precursor MCM22(P), a hydrophobic tail segment that resembles the swelling agent used to swell MCM22(P), and a di-quaternary ammonium linker that connects both segments. MIT-1 features high crystallinity and surface areas exceeding 500 m 2g -1, and can be synthesized over a wide synthesis window that includes Si/Al ratios ranging from 13 to 67. Characterization data reveal high mesoporosity andmore » acid strength with no detectable amorphous silica phases. In conclusion, compared to MCM-22 and MCM-56, MIT-1 shows a three-fold increase in catalytic activity for the Friedel-Crafts alkylation of benzene with benzyl alcohol.« less

Disorder effect on the Friedel oscillations in a one-dimensional Mott insulator

NASA Astrophysics Data System (ADS)

Weiss, Y.; Goldstein, M.; Berkovits, R.

2007-07-01

The Friedel oscillations resulting from coupling a quantum dot to one edge of a disordered one-dimensional wire in the Mott insulator regime are calculated numerically using the density matrix renormalization group method. By investigating the influence of a constant weak disorder on the Friedel oscillations decay we find that the effect of disorder is reduced by increasing the interaction strength. This behavior is opposite to the recently reported influence of disorder in the Anderson insulator regime.

The azomethine ylide route to amine C-H functionalization: redox-versions of classic reactions and a pathway to new transformations.

PubMed

Seidel, Daniel

2015-02-17

Conspectus Redox-neutral methods for the functionalization of amine α-C-H bonds are inherently efficient because they avoid external oxidants and reductants and often do not generate unwanted byproducts. However, most of the current methods for amine α-C-H bond functionalization are oxidative in nature. While the most efficient variants utilize atmospheric oxygen as the terminal oxidant, many such transformations require the use of expensive or toxic oxidants, often coupled with the need for transition metal catalysts. Redox-neutral amine α-functionalizations that involve intramolecular hydride transfer steps provide viable alternatives to certain oxidative reactions. These processes have been known for some time and are particularly well suited for tertiary amine substrates. A mechanistically distinct strategy for secondary amines has emerged only recently, despite sharing common features with a range of classic organic transformations. Among those are such widely used reactions as the Strecker, Mannich, Pictet-Spengler, and Kabachnik-Fields reactions, Friedel-Crafts alkylations, and iminium alkynylations. In these classic processes, condensation of a secondary amine with an aldehyde (or a ketone) typically leads to the formation of an intermediate iminium ion, which is subsequently attacked by a nucleophile. The corresponding redox-versions of these transformations utilize identical starting materials but incorporate an isomerization step that enables α-C-H bond functionalization. Intramolecular versions of these reactions include redox-neutral amine α-amination, α-oxygenation, and α-sulfenylation. In all cases, a reductive N-alkylation is effectively combined with an oxidative α-functionalization, generating water as the only byproduct. Reactions are promoted by simple carboxylic acids and in some cases require no additives. Azomethine ylides, dipolar species whose usage is predominantly in [3 + 2] cycloadditions and other pericyclic processes, have been identified as common intermediates. Extension of this chemistry to amine α,β-difunctionalization has been shown to be possible by way of converting the intermediate azomethine ylides into transient enamines. This Account details the evolution of this general strategy and the progress made to date. Further included is a discussion of related decarboxylative reactions and transformations that result in the redox-neutral aromatization of (partially) saturated cyclic amines. These processes also involve azomethine ylides, reactive intermediates that appear to be far more prevalent in condensation chemistry of amines and carbonyl compounds than previously considered. In contrast, as exemplified by some redox transformations that have been studied in greater detail, iminium ions are not necessarily involved in all amine/aldehyde condensation reactions.

Role of calcium on chloride binding in hydrated Portland cement–metakaolin–limestone blends

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

Shi, Zhenguo; Geiker, Mette Rica; De Weerdt, Klaartje

Chloride binding is investigated for Portland cement–metakaolin–limestone pastes exposed to CaCl{sub 2} and NaCl solutions. The phase assemblages and the amount of Friedel's salt are evaluated using TGA, XRD and thermodynamic modeling. A larger amount of Friedel's salt is observed in the metakaolin blends compared to the pure Portland cement. A higher total chloride binding is observed for the pastes exposed to the CaCl{sub 2} solution relative to those in the NaCl solution. This is reflected by the fact that calcium increases the quantity of Friedel's salt in the metakaolin blends by promoting the transformation of strätlingite and/or monocarbonate tomore » Friedel's salt. Calcium increases also the amount of chloride in the diffuse layer of the C-S-H for the pure cement. A linear correlation between the total bound chloride and the uptake of calcium from the CaCl{sub 2} solution is obtained and found to be independent on the type of cement blend.« less

Impact of Friedel oscillations on vapor-liquid equilibria and supercritical properties in two and three dimensions

NASA Astrophysics Data System (ADS)

Desgranges, Caroline; Huber, Landon; Delhommelle, Jerome

2016-07-01

We determine the impact of the Friedel oscillations on the phase behavior, critical properties, and thermodynamic contours in films [two dimensions (2 D )] and bulk phases [three dimensions (3 D )]. Using expanded Wang-Landau simulations, we calculate the grand-canonical partition function and, in turn, the thermodynamic properties of systems modeled with a linear combination of the Lennard-Jones and Dzugutov potentials, weighted by a parameter X (0

A review of new developments in the Friedel–Crafts alkylation – From green chemistry to asymmetric catalysis

PubMed Central

2010-01-01

Summary The development of efficient Friedel–Crafts alkylations of arenes and heteroarenes using only catalytic amounts of a Lewis acid has gained much attention over the last decade. The new catalytic approaches described in this review are favoured over classical Friedel–Crafts conditions as benzyl-, propargyl- and allyl alcohols, or styrenes, can be used instead of toxic benzyl halides. Additionally, only low catalyst loadings are needed to provide a wide range of products. Following a short introduction about the origin and classical definition of the Friedel–Crafts reaction, the review will describe the different environmentally benign substrates which can be applied today as an approach towards greener processes. Additionally, the first diastereoselective and enantioselective Friedel–Crafts-type alkylations will be highlighted. PMID:20485588

Combinatorial synthesis and in vitro evaluation of a biaryl hydroxyketone library as antivirulence agents against MRSA.

PubMed

Yu, Guanping; Kuo, David; Shoham, Menachem; Viswanathan, Rajesh

2014-02-10

Antibiotic resistance coupled with decreased development of new antibiotics necessitates the search for novel antibacterial agents. Antivirulence agents offer an alternative to conventional antibiotics. In this work, we report on a family of small-molecule antivirulence agents against methicillin-resistant Staphylococcus aureus (MRSA), the most widespread bacterial pathogen. Structure-activity relationship studies led to the development of a concise synthesis of a 148-member biarylhydroxyketone library. An acylation bond-forming process afforded resorcinols (1) and aryloxy acetonitriles (2) as synthons. A Lewis-acid-activated Friedel-Crafts' acylation step involving a nitrile functionality of 2 by ZnCl2, followed by nucleophilic attack by 1 was executed to obtain biaryl hydroxyketones in excellent yields. A large number of products crystallized. This strategy affords a range of biarylhydroxyketones in a single step. This is the first collective synthetic study documenting access to this class of compounds through a single synthetic operation. In vitro efficacy of compounds in this library was evaluated by a rabbit erythrocyte hemolysis assay. The most efficacious compound, 4f-12, inhibits hemolysis by 98.1 ± 0.1% compared to control in the absence of the compound.

Electrophilic Cleavage and Functionalization of Polyisobutylenes Bearing Unsaturations in the Backbone and Synthesis of Polymers for this Process

NASA Astrophysics Data System (ADS)

Campbell, Christopher Garrett

Polyisobutylene is a polymer of high commercial and academic interest due to its low cost of synthesis, high gas barrier properties, and high chemical and oxidative stability. Polyisobutylene (PIB) can only be synthesized by the cationic polymerization of isobutylene (IB). Commercial processes are currently only capable of producing monofunctional PIB or copolymers thereof. The living cationic polymerization of isobutylene is capable of producing difunctional telechelic PIB, but at the expense of difficultly or expensively synthesized initiators. Thus there exists a need for new synthetic routes for multifunctional PIBs, which can be adopted on a commercial scale. In the first project, we demonstrated a new reaction, which is a subset of the Friedel Crafts alkylation reaction, in which the alkylating carbocation undergoes a cleavage reaction prior to reaction with the aromatic substrate. This reaction was discovered by the observation that when a PIB containing a large amount of coupled fraction was subjected to a mixture of protic and Lewis acids (HCl/TiCl4) in the presence of an alkoxybenzene compound, the coupled fraction was quantitatively converted to its constituent monofunctional chains, which became functionalized by the alkoxybenzene. In the second project, a commercial polymer, poly(isobutylene- co-isoprene) (butyl rubber) was used as a substrate upon which the aforementioned electrophilic cleavage and functionalization reaction was performed. The goal of this project was to degrade a high molecular weight, main-chain olefin-containing copolymer of isobutylene into low molecular weight difunctional telechelic polyisobutylenes. This general process, though not necessarily proceeding by the aforementioned novel chemical reaction, has been described in the literature as "constructive degradation." Though we were unable to synthesize truly telechelic polyisobutylenes by this method, we were able to demonstrate this method as a viable route to low molecular weight multifunctional PIBs. In the third project, we attempted to synthesize a random copolymer, previously reported by Kennedy et al., of isobutylene and 2,4-dimethyl-1,3-pentadiene (DMPD). The interest in this copolymer was based on its structural similarity to the coupled PIB mentioned in the first project. However, we found that these two monomers are not well suited to the creation of random copolymers due to a large difference in reactivity ratios. The project presented in this chapter was then redirected toward the structural characterization of the products of attempted copolymerization and of the homo-polymerization of DMPD. In the fourth project, we investigated the copolymer of isobutylene and beta-pinene as a substrate for the aforementioned cleavage/functionalization reaction. We were able to synthesize high molecular weight copolymers of these two monomers via slurry polymerization catalyzed by either TiCl4 or ethylaluminum dichloride (EADC), and though the degradation and functionalization kinetics were much slower than for butyl rubber, we did observe a drastic decrease in molecular weight accompanied by functionalization of the polymer, thus proving this chemistry is applicable to copolymers of isobutylene other than butyl rubber.

Mechanistic insights on the cycloisomerization of polyunsaturated precursors catalyzed by platinum and gold complexes.

PubMed

Soriano, Elena; Marco-Contelles, José

2009-08-18

Organometallic chemistry provides powerful tools for the stereocontrolled synthesis of heterocycles and carbocycles. The electrophilic transition metals Pt(II) and Au(I, III) are efficient catalysts in these transitions and promote a variety of organic transformations of unsaturated precursors. These reactions produce functionalized cyclic and acyclic scaffolds for the synthesis of natural and non-natural products efficiently, under mild conditions, and with excellent chemoselectivity. Because these transformations are strongly substrate-dependent, they are versatile and may yield diverse molecular scaffolds. Therefore, synthetic chemists need a mechanistic interpretation to optimize this reaction process and design a new generation of catalysts. However, so far, no intermediate species has been isolated or characterized, so the formulated mechanistic hypotheses have been primarily based on labeling studies or trapping reactions. Recently, theoretical DFT studies have become a useful tool in our research, giving us insights into the key intermediates and into a variety of plausible reaction pathways. In this Account, we present a comprehensive mechanistic overview of transformations promoted by Pt and Au in a non-nucleophilic medium based on quantum-mechanical studies. The calculations are consistent with the experimental observations and provide fundamental insights into the versatility of these reaction processes. The reactivity of these metals results from their peculiar Lewis acid properties: the alkynophilic character of these soft metals and the pi-acid activation of unsaturated groups promotes the intra- or intermolecular attack of a nucleophile. 1,n-Enynes (n = 3-8) are particularly important precursors, and their transformation may yield a variety of cycloadducts depending on the molecular structure. However, the calculations suggest that these different cyclizations would have closely related reaction mechanisms, and we propose a unified mechanistic picture. The intramolecular nucleophilic attack of the double bond on the activated alkyne takes place by an endo-dig or exo-dig pathway to afford a cyclopropyl-metallocarbenoid. Through divergent routes, the cyclopropyl intermediate formed by exo-cyclopropanation could yield the metathesis adduct or bicyclic compounds. The endo-cyclization may be followed by a [1,2]-migration of the propargyl moiety to the internal acetylenic position to afford bicyclic [n.1.0] derivatives. This reaction mechanism is applicable for functional groups ranging from H to carboxylate propargyl substituents (Rautenstrauch reaction). In intramolecular reactions in which a shorter enyne bears a propargyl ester or in intermolecular reactions of an ester with an alkene, the ester preferentially attacks the activated alkyne because of enthalpic (ring strain) and entropic effects. Our calculations can predict the correct stereochemical outcome, which may aid the rational design of further stereoselective syntheses. The alkynes activated by electrophilic species can also react with other nucleophiles, such as aromatic rings. The calculations account for the high endo-selectivity observed and suggest that this transformation takes place through a Friedel-Crafts-type alkenylation mechanism, where the endo-dig cyclization promoted by PtCl(2) may involve a cyclopropylmetallacarbene as intermediate before the formation of the expected Wheland-type intermediate. These comparisons of the computational approach with experiment demonstrate the value of theory in the development of a solid mechanistic understanding of these reaction processes.

2-Methyltetrahydro-3-benzazepin-1-ols - The missing link in SAR of GluN2B selective NMDA receptor antagonists.

PubMed

Dey, Sougata; Schepmann, Dirk; Wünsch, Bernhard

2018-01-15

The NMDA receptor containing GluN2B subunits represents a promising target for the development of drugs for the treatment of various neurological disorders including neurodegenerative diseases. In order to study the role of CH 3 and OH moieties trisubstituted tetrahydro-3-benzazepines 4 were designed as missing link between tetra- and disubstituted 3-benzazepines 2 and 5. The synthesis of 4 comprises eight reaction steps starting from alanine. The intramolecular Friedel-Crafts acylation to obtain the ketone 12 and the base-catalyzed elimination of trifluoromethanesulfinate (CF 3 SO 2 - ) followed by NaBH 4 reduction represent the key steps. The GluN2B affinity of the cis-configured 3-benzazepin-1-ol cis-4a with a 4-phenylbutyl side chain (K i  = 252 nM) is considerably lower than the GluN2B affinity of (R,R)-2 (K i  = 17 nM) indicating the importance of the phenolic OH moiety for the interaction with the receptor protein. Introduction of an additional CH 3 moiety in 2-position led to a slight decrease of GluN2B affinity as can be seen by comparing the affinity data of cis-4a and 5. The homologous phenylpentyl derivative cis-4b shows the highest GluN2B affinity (K i  = 56 nM) of this series of compounds. According to docking studies cis-4a adopts the same binding mode as the cocrystallized ligand ifenprodil-keto 1A and 5 at the interface of the GluN2B and GluN1a subunits. The same crucial H-bonds are formed between the C(O)NH 2 moiety of Gln110 within the GluN2B subunit and the protonated amino moiety and the OH moiety of (R,R)-cis-4a. Copyright © 2017 Elsevier Ltd. All rights reserved.

Discovery and Characterization of a Group of Fungal Polycyclic Polyketide Prenyltransferases

PubMed Central

Chooi, Yit-Heng; Wang, Peng; Fang, Jinxu; Li, Yanran; Wu, Katherine; Wang, Pin; Tang, Yi

2014-01-01

The prenyltransferase (PTase) gene vrtC was proposed to be involved in viridicatumtoxin (1) biosynthesis in Penicillium aethiopicum. Targeted gene deletion and reconstitution of recombinant VrtC activity in vitro established that VrtC is a geranyl transferase that catalyzes a regiospecific Friedel-Crafts alkylation of the naphthacenedione carboxamide intermediate 2 at carbon 6 with geranyl diphosphate (GPP). VrtC can function in the absence of divalent ions and can utilize similar naphthacenedione substrates, such as the acetyl-primed TAN-1612 (4). Genome mining using the VrtC protein sequence leads to the identification of a homologous group of PTase genes in the genomes of human and animal-associated fungi. Three enzymes encoded by this new subgroup of PTase genes from Neosartorya fischeri, Microsporum canis and Trichophyton tonsurans were shown to be able to catalyze transfer of dimethylallyl to several tetracyclic naphthacenedione substrates in vitro. In total, seven C5- or C10-prenylated naphthacenedione compounds were generated. The regioselectivity of these new polycyclic PTases (pcPTases) was confirmed by characterization of product 9 obtained from biotransformation of 4 in Escherichia coli expressing the N. fischeri pcPTase gene. The discovery of this new subgroup of PTases extends our enzymatic tools for modifying polycyclic compounds and enables genome mining of new prenylated polyketides. PMID:22590971

Thermo- and pH-responsive polymer brushes-grafted gigaporous polystyrene microspheres as a high-speed protein chromatography matrix.

PubMed

Qu, Jian-Bo; Xu, Yu-Liang; Liu, Jun-Yi; Zeng, Jing-Bin; Chen, Yan-Li; Zhou, Wei-Qing; Liu, Jian-Guo

2016-04-08

Dual thermo- and pH-responsive chromatography has been proposed using poly(N-isopropylacrylamide-co-butyl methacrylate-co-N,N-dimethylaminopropyl acrylamide) (P(NIPAM-co-BMA-co-DMAPAAM)) brushes grafted gigaporous polystyrene microspheres (GPM) as matrix. Atom transfer radical polymerization (ATRP) initiator was first coupled onto GPM through Friedel-Crafts acylation with 2-bromoisobutyryl bromide. The dual-responsive polymer brushes were then grafted onto GPM via surface-initiated ATRP. The surface composition, gigaporous structure, protein adsorption and dual-responsive chromatographic properties of the matrix (GPM-P(NIPAM-co-BMA-co-DMAPAAM) were characterized in detail. Results showed that GPM were successfully grafted with thermoresponsive cationic polymer brushes and that the gigaporous structure was well maintained. A column packed with GPM-P(NIPAM-co-BMA-co-DMAPAAM presented low backpressure, good permeability and appreciable thermo-responsibility. By changing pH of the mobile phase and temperature of the column in turn, the column can separate three model proteins at the mobile phase velocity up to 2528cmh(-1). A separation mechanism of this matrix was also proposed. All results indicate that the dual thermo- and pH-responsive chromatography matrix has great potentials in 'green' high-speed protein chromatography. Copyright © 2016 Elsevier B.V. All rights reserved.

Knitting aromatic polymers for efficient solid-phase microextraction of trace organic pollutants.

PubMed

Liu, Shuqin; Hu, Qingkun; Zheng, Juan; Xie, Lijun; Wei, Songbo; Jiang, Ruifen; Zhu, Fang; Liu, Yuan; Ouyang, Gangfeng

2016-06-10

A series of knitting aromatic polymers (KAPs) were successfully synthesized using a simple one-step Friedel-Crafts alkylation of aromatic monomers and were characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). Then, as-synthesized KAPs with large surface areas, unique pore structures and high thermal stability were prepared as solid-phase microextraction (SPME) coatings that exhibited good extraction abilities for a series of benzene compounds (i.e., benzene, toluene, ethylbenzene and m-xylene, which are referred to as BTEX) and polycyclic aromatic hydrocarbons (PAHs). Under the optimized conditions, the methodologies established for the determination of BTEX and PAHs using the KAPs-triPB and KAPs-B coatings, respectively, possessed wide linear ranges, low limits of detection (LODs, 0.10-1.13ngL(-1) for BTEX and 0.05-0.49ngL(-1) for PAHs) and good reproducibility. Finally, the proposed methods were successfully applied to the determination of BTEX and PAHs in environmental water samples, and satisfactory recoveries (93.6-124.2% for BTEX and 77.2-113.3% for PAHs) were achieved. This study provides a benchmark for exploiting novel microporous organic polymers (MOPs) for SPME applications. Copyright © 2016 Elsevier B.V. All rights reserved.

Influence of Chloride-Ion Adsorption Agent on Chloride Ions in Concrete and Mortar.

PubMed

Peng, Gai-Fei; Feng, Nai-Qian; Song, Qi-Ming

2014-04-30

The influence of a chloride-ion adsorption agent (Cl agent in short), composed of zeolite, calcium aluminate hydrate and calcium nitrite, on the ingress of chloride ions into concrete and mortar has been experimentally studied. The permeability of concrete was measured, and the chloride ion content in mortar was tested. The experimental results reveal that the Cl agent could adsorb chloride ions effectively, which had penetrated into concrete and mortar. When the Cl agent was used at a dosage of 6% by mass of cementitious materials in mortar, the resistance to the penetration of chloride ions could be improved greatly, which was more pronounced when a combination of the Cl agent and fly ash or slag was employed. Such an effect is not the result of the low permeability of the mortar, but might be a result of the interaction between the Cl agent and the chloride ions penetrated into the mortar. There are two possible mechanisms for the interaction between the Cl agent and chloride ion ingress. One is the reaction between calcium aluminate hydrate in the Cl agent and chloride ions to form Friedel's salt, and the other one is that calcium aluminate hydrate reacts with calcium nitrite to form AFm during the early-age hydration of mortar and later the NO₂ - in AFm is replaced by chloride ions, which then penetrate into the mortar, also forming Friedel's salt. More research is needed to confirm the mechanisms.

Soda Bottle Boating.

ERIC Educational Resources Information Center

Martin, William

1991-01-01

Describes an activity that allows students to design and build a craft whose propulsion is derived entirely by the carbon dioxide produced in the chemical reaction between baking soda and vinegar. (ZWH)

Direct electron transfer of glucose oxidase and dual hydrogen peroxide and glucose detection based on water-dispersible carbon nanotubes derivative.

PubMed

Chen, Hsiao-Chien; Tu, Yi-Ming; Hou, Chung-Che; Lin, Yu-Chen; Chen, Ching-Hsiang; Yang, Kuang-Hsuan

2015-03-31

A water-dispersible multi-walled carbon nanotubes (MWCNTs) derivative, MWCNTs-1-one-dihydroxypyridine (MWCNTs-Py) was synthesis via Friedel-Crafts chemical acylation. Raman spectra demonstrated the conjugated level of MWCNTs-Py was retained after this chemical modification. MWCNTs-Py showed dual hydrogen peroxide (H2O2) and glucose detections without mutual interference by adjusting pH value. It was sensitive to H2O2 in acidic solution and displayed the high performances of sensitivity, linear range, response time and stability; meanwhile it did not respond to H2O2 in neutral solution. In addition, this positively charged MWCNTs-Py could adsorb glucose oxidase (GOD) by electrostatic attraction. MWCNTs-Py-GOD/GC electrode showed the direct electron transfer (DET) of GOD with a pair of well-defined redox peaks, attesting the bioactivity of GOD was retained due to the non-destroyed immobilization. The high surface coverage of active GOD (3.5×10(-9) mol cm(-2)) resulted in exhibiting a good electrocatalytic activity toward glucose. This glucose sensor showed high sensitivity (68.1 μA mM(-1) cm(-2)) in a linear range from 3 μM to 7 mM in neutral buffer solution. The proposed sensor could distinguish H2O2 and glucose, thus owning high selectivity and reliability. Copyright © 2015. Published by Elsevier B.V.

A sensitive and selective magnetic graphene composite-modified polycrystalline-silicon nanowire field-effect transistor for bladder cancer diagnosis.

PubMed

Chen, Hsiao-Chien; Chen, Yi-Ting; Tsai, Rung-Ywan; Chen, Min-Cheng; Chen, Shi-Liang; Xiao, Min-Cong; Chen, Chien-Lun; Hua, Mu-Yi

2015-04-15

In this study, we describe the urinary quantification of apolipoprotein A II protein (APOA2 protein), a biomarker for the diagnosis of bladder cancer, using an n-type polycrystalline silicon nanowire field-effect transistor (poly-SiNW-FET). The modification of poly-SiNW-FET by magnetic graphene with long-chain acid groups (MGLA) synthesized via Friedel-Crafts acylation was compared with that obtained using short-chain acid groups (MGSA). Compared with MGSA, the MGLA showed a higher immobilization degree and bioactivity to the anti-APOA2 antibody (Ab) due to its lower steric hindrance. In addition, the magnetic properties enabled rapid separation and purification during Ab immobilization, ultimately preserving its bioactivity. The Ab-MGLA/poly-SiNW-FET exhibited a linear dependence of relative response to the logarithmical concentration in a range between 19.5pgmL(-1) and 1.95µgmL(-1), with a limit of detection (LOD) of 6.7pgmL(-1). An additional washing step before measurement aimed at excluding the interfering biocomponents ensured the reliability of the assay. We conclude that our biosensor efficiently distinguishes mean values of urinary APOA2 protein concentrations between patients with bladder cancer (29-344ngmL(-1)) and those with hernia (0.425-9.47ngmL(-1)). Copyright © 2014 Elsevier B.V. All rights reserved.

Dislocations and other topological oddities

NASA Astrophysics Data System (ADS)

Pieranski, Pawel

2016-03-01

We will show that the book Dislocations by Jacques Friedel, published half a century ago, can still be recommended, in agreement with the author's intention, as a textbook ;for research students at University and for students at engineering schools as well as for research engineers;. Indeed, today dislocations are known to occur not only in solid crystals but also in many other systems discovered more recently such as colloidal crystals or liquid crystals having periodic structures. Moreover, the concept of dislocations is an excellent starting point for lectures on topological defects occurring in systems equipped with order parameters resulting from broken symmetries: disclinations in nematic or hexatic liquid crystals, dispirations in chiral smectics or disorientations in lyotropic liquid crystals. The discussion of dislocations in Blue Phases will give us an opportunity to call on mind Sir Charles Frank, friend of Jacques Friedel since his Bristol years, who called these ephemeral mesophases ;topological oddities;. Being made of networks of disclinations, Blue Phases are similar to Twist Grain Boundary (TGB) smectic phases, which are made of networks of screw dislocations and whose existence was predicted by de Gennes in 1972 on the basis of the analogy between smectics and superconductors. We will stress that the book by Jacques Friedel contains seeds of this analogy.

CRAFT (complete reduction to amplitude frequency table)--robust and time-efficient Bayesian approach for quantitative mixture analysis by NMR.

PubMed

Krishnamurthy, Krish

2013-12-01

The intrinsic quantitative nature of NMR is increasingly exploited in areas ranging from complex mixture analysis (as in metabolomics and reaction monitoring) to quality assurance/control. Complex NMR spectra are more common than not, and therefore, extraction of quantitative information generally involves significant prior knowledge and/or operator interaction to characterize resonances of interest. Moreover, in most NMR-based metabolomic experiments, the signals from metabolites are normally present as a mixture of overlapping resonances, making quantification difficult. Time-domain Bayesian approaches have been reported to be better than conventional frequency-domain analysis at identifying subtle changes in signal amplitude. We discuss an approach that exploits Bayesian analysis to achieve a complete reduction to amplitude frequency table (CRAFT) in an automated and time-efficient fashion - thus converting the time-domain FID to a frequency-amplitude table. CRAFT uses a two-step approach to FID analysis. First, the FID is digitally filtered and downsampled to several sub FIDs, and secondly, these sub FIDs are then modeled as sums of decaying sinusoids using the Bayesian approach. CRAFT tables can be used for further data mining of quantitative information using fingerprint chemical shifts of compounds of interest and/or statistical analysis of modulation of chemical quantity in a biological study (metabolomics) or process study (reaction monitoring) or quality assurance/control. The basic principles behind this approach as well as results to evaluate the effectiveness of this approach in mixture analysis are presented. Copyright © 2013 John Wiley & Sons, Ltd.

Steering Asymmetric Lewis Acid Catalysis Exclusively with Octahedral Metal-Centered Chirality.

PubMed

Zhang, Lilu; Meggers, Eric

2017-02-21

Catalysts for asymmetric synthesis must be chiral. Metal-based asymmetric catalysts are typically constructed by assembling chiral ligands around a central metal. In this Account, a new class of effective chiral Lewis acid catalysts is introduced in which the octahedral metal center constitutes the exclusive source of chirality. Specifically, the here discussed class of catalysts are composed of configurationally stable, chiral-at-metal Λ-configured (left-handed propeller) or Δ-configured (right-handed propeller) iridium(III) or rhodium(III) complexes containing two bidentate cyclometalating 5-tert-butyl-2-phenylbenzoxazole (dubbed IrO and RhO) or 5-tert-butyl-2-phenylbenzothiazole (dubbed IrS and RhS) ligands in addition to two exchange-labile acetonitriles. They are synthetically accessible in an enantiomerically pure fashion through a convenient auxiliary-mediated synthesis. Such catalysts are of interest due to their intrinsic structural simplicity (only achiral ligands) and the prospect of an especially effective asymmetric induction due to the intimate contact between the chiral metal center and the metal-coordinated substrates or reagents. With respect to chiral Lewis acid catalysis, the bis-cyclometalated iridium and rhodium complexes provide excellent catalytic activities and asymmetric inductions for a variety of reactions including Michael additions, Friedel-Crafts reactions, cycloadditions, α-aminations, α-fluorinations, Mannich reactions, and a cross-dehydrogenative coupling. Mechanistically, substrates such as 2-acyl imidazoles are usually activated by two-point binding. Exceptions exist as for example for an efficient iridium-catalyzed enantioselective transfer hydrogenation of arylketones with ammonium formate, which putatively proceeds through an iridium-hydride intermediate. The bis-cyclometalated iridium complexes catalyze visible-light-induced asymmetric reactions by intertwining asymmetric catalysis and photoredox catalysis in a unique fashion. This has been applied to the visible-light-induced α-alkylation of 2-acyl imidazoles (and in some instances 2-acylpyridines) with acceptor-substituted benzyl, phenacyl, trifluoromethyl, perfluoroalkyl, and trichloromethyl groups, in addition to photoinduced oxidative α-aminoalkylations and a photoinduced stereocontrolled radical-radical coupling, each employing a single iridium complex. In all photoinduced reaction schemes, the iridium complex serves as a chiral Lewis acid catalyst and at the same time as precursor of in situ assembled photoactive species. The nature of these photoactive intermediates then determines their photochemical properties and thereby the course of the asymmetric photoredox reactions. The bis-cyclometalated rhodium complexes are also very useful for asymmetric photoredox catalysis. Less efficient photochemical properties are compensated with a more rapid ligand exchange kinetics, which permits higher turnover frequencies of the catalytic cycle. This has been applied to a visible-light-induced enantioselective radical α-amination of 2-acyl imidazoles. In this reaction, an intermediate rhodium enolate is supposed to function as a photoactivatable smart initiator to initiate and reinitiate an efficient radical chain process. If a more efficient photoactivation is required, a rhodium-based Lewis acid can be complemented with a photoredox cocatalyst, and this has been applied to efficient catalytic asymmetric alkyl radical additions to acceptor-substituted alkenes. We believe that this class of chiral-only-at-metal Lewis acid catalysts will be of significant value in the field of asymmetric synthesis, in particular in combination with visible-light-induced redox chemistry, which has already resulted in novel strategies for asymmetric synthesis of chiral molecules. Hopefully, this work will also pave the way for the development of other asymmetric catalysts featuring exclusively octahedral centrochirality.

Mechanism-based site-directed mutagenesis to shift the optimum pH of the phenylalanine ammonia-lyase from Rhodotorula glutinis JN-1.

PubMed

Zhu, Longbao; Zhou, Li; Cui, Wenjing; Liu, Zhongmei; Zhou, Zhemin

2014-09-01

Phenylalanine ammonia-lyase ( Rg PAL) from Rhodotorula glutinis JN-1 stereoselectively catalyzes the conversion of the l-phenylalanine into trans -cinnamic acid and ammonia, and was used in chiral resolution of dl-phenylalanine to produce the d-phenylalanine under acidic condition. However, the optimum pH of Rg PAL is 9 and the Rg PAL exhibits low catalytic efficiency at acidic side. Therefore, a mutant Rg PAL with a lower optimum pH is expected. Based on catalytic mechanism and structure analysis, we constructed a mutant Rg PAL-Q137E by site-directed mutagenesis, and found that this mutant had an extended optimum pH 7-9 with activity of 1.8-fold higher than that of the wild type at pH 7. As revealed by Friedel-Crafts-type mechanism of Rg PAL, the improvement of the Rg PAL-Q137E might be due to the negative charge of Glu137 which could stabilize the intermediate transition states through electrostatic interaction. The Rg PAL-Q137E mutant was used to resolve the racemic dl-phenylalanine, and the conversion rate and the ee D value of d-phenylalanine using Rg PAL-Q137E at pH 7 were increased by 29% and 48%, and achieved 93% and 86%, respectively. This work provides an effective strategy to shift the optimum pH which is favorable to further applications of Rg PAL.

Controllable synthesis of SnO2@carbon hollow sphere based on bi-functional metallo-organic molecule for high-performance anode in Li-ion batteries

NASA Astrophysics Data System (ADS)

Zhang, Haiyan; Li, Liuqing; Li, Zhaopeng; Zhong, Weihao; Liao, Haiyang; Li, Zhenghui

2018-06-01

Constructing hollow structure and nano-sized SnO2 particles are two normal strategies to improve lithium storage performance of SnO2-based electrode. But it is still challengeable to fabricate ultrasmall SnO2 embedded in carbon hollow sphere in a controllable way. Herein, we have synthesized a kind of SnO2@carbon hollow sphere via a confined Friedel-Crafts crosslinking of a novel metal-organic compound (triphenyltin chloride, named Sn-Ph) on the surface of SiO2 template. The as-prepared SnO2@carbon hollow sphere has 10 nm-sized SnO2 particles embedded in amorphous carbon wall. Furthermore, 100, 200 and 400 nm-sized SnO2@carbon hollow spheres can be obtained by regulating the size of SiO2 template. When they are applied in lithium-ion batteries, the carbon structure can act as barriers to protect SnO2 particles from pulverization, and hollow core stores electrolyte and very small SnO2 particles of 10 nm shorten the diffusion distance of lithium ions. Thus, SnO2@carbon hollow sphere presents superior electrochemical performance. The first discharge and charge capacities reach 1378.5 and 507.3 mAh g-1 respectively, and 100 cycles later, its capacity remains 501.2 mAh g-1, indicating a capacity retention of 98.8% (C100th/C2nd).

Dynamical Friedel oscillations of a Fermi sea

NASA Astrophysics Data System (ADS)

Zhang, J. M.; Liu, Y.

2018-02-01

We study the scenario of quenching an interaction-free Fermi sea on a one-dimensional lattice ring by suddenly changing the potential of a site. From the point-of-view of the conventional Friedel oscillation, which is a static or equilibrium problem, it is of interest what temporal and spatial oscillations the local sudden quench will induce. Numerically, the primary observation is that for a generic site, the local particle density switches between two plateaus periodically in time. Making use of the proximity of the realistic model to an exactly solvable model and employing the Abel regularization to assign a definite value to a divergent series, we obtain an analytical formula for the heights of the plateaus, which turns out to be very accurate for sites not too close to the quench site. The unexpect relevance and the incredible accuracy of the Abel regularization are yet to be understood. Eventually, when the contribution of the defect mode is also taken into account, the plateaus for those sites close to or on the quench site can also be accurately predicted. We have also studied the infinite lattice case. In this case, ensuing the quench, the out-going wave fronts leave behind a stable density oscillation pattern. Because of some interesting single-particle property, this dynamically generated Friedel oscillation differs from its conventional static counterpart only by the defect mode.

Real-Time Lunar Prospector Data Visualization Using Web-Based Java

NASA Technical Reports Server (NTRS)

Deardorff, D. Glenn; Green, Bryan D.; Gerald-Yamasaki, Michael (Technical Monitor)

1998-01-01

The Lunar Prospector was co-developed by NASA Ames Research Center and Lockheed Martin, and was launched on January 6th, 1998. Its mission is to search for water ice and various elements in the Moon's surface, map its magnetic and gravity fields, and detect volcanic activity. For the first time, the World Wide Web is being used to graphically display near-real-time data from a planetary exploration mission to the global public. Science data from the craft's instruments, as well as engineering data for the spacecraft subsystems, are continuously displayed in time-varying XY plots. The craft's current location is displayed relative to the whole Moon, and as an off-craft observer would see in the reference frame of the craft, with the lunar terrain scrolling underneath. These features are implemented as Java applets. Analyzed data (element and mass distribution) is presented as 3D lunar maps using VRML and Javascript. During the development phase, implementations of the Java Virtual Machine were just beginning to mature enough to adequately accommodate our target featureset; incomplete and varying implementations were the biggest bottleneck to our ideal of ubiquitous browser access. Bottlenecks notwithstanding, the reaction from the Internet community was overwhelmingly enthusiastic.

Toward Green Acylation of (Hetero)arenes: Palladium-Catalyzed Carbonylation of Olefins to Ketones

PubMed Central

2017-01-01

Green Friedel–Crafts acylation reactions belong to the most desired transformations in organic chemistry. The resulting ketones constitute important intermediates, building blocks, and functional molecules in organic synthesis as well as for the chemical industry. Over the past 60 years, advances in this topic have focused on how to make this reaction more economically and environmentally friendly by using green acylating conditions, such as stoichiometric acylations and catalytic homogeneous and heterogeneous acylations. However, currently well-established methodologies for their synthesis either produce significant amounts of waste or proceed under harsh conditions, limiting applications. Here, we present a new protocol for the straightforward and selective introduction of acyl groups into (hetero)arenes without directing groups by using available olefins with inexpensive CO. In the presence of commercial palladium catalysts, inter- and intramolecular carbonylative C–H functionalizations take place with good regio- and chemoselectivity. Compared to classical Friedel–Crafts chemistry, this novel methodology proceeds under mild reaction conditions. The general applicability of this methodology is demonstrated by the direct carbonylation of industrial feedstocks (ethylene and diisobutene) as well as of natural products (eugenol and safrole). Furthermore, synthetic applications to drug molecules are showcased. PMID:29392174

Intercalated layered clay composites and their applications

NASA Astrophysics Data System (ADS)

Phukan, Anjali

Supported inorganic reagents are rapidly emerging as new and environmentally acceptable reagents and catalysts. The smectite group of layered clay minerals, such as, Montmorillonite, provides promising character for adsorption, catalytic activity, supports etc. for their large surface area, swelling behavior and ion exchange properties. Aromatic compounds intercalated in layered clays are useful in optical molecular devices. Clay is a unique material for adsorption of heavy metals and various toxic substances. Clay surfaces are known to be catalytically active due to their surface acidity. Acid activated clays possess much improved surface areas and acidities and have higher pore volumes so that can absorb large molecules in the pores. The exchangeable cations in clay minerals play a key role in controlling surface acidity and catalytic activity. Recently, optically active metal-complex-Montmorillonite composites are reported to be active in antiracemization purposes. In view of the above, a research work, relating to the preparation of different modified clay composites and their catalytic applications were carried out. The different aspects and results of the present work have been reported in four major chapters. Chapter I: This is an introductory chapter, which contains a review of the literature regarding clay-based materials. Clay minerals are phyllosilicates with layer structure. Montmorillonite, a member of smectite group of clay, is 2:1 phyllosilicate, where a layer is composed of an octahedral sheet sandwiched by two tetrahedral sheets. Such clay shows cation exchange capacity (CEC) and is expressed in milli-equivalents per 100 gm of dry clay. Clays can be modified by interaction with metal ion, metal complexes, metal cluster and organic cations for various applications. Clays are also modified by treating with acid followed by impregnation with metal salts or ions. Montmorillonite can intercalate suitable metal complexes in excess of CEC to form double or pseudo-trilayer composites. Metal ion and metal ion metal salts intercalated on Montmorillonite are efficient catalysts for Friedel-Crafts (FC) reactions, such as benzylation of benzene, synthesis of Raspberry ketone [4-(4'-hydroxyphenyl)butan-2-one] etc. Montmorillonite clay can be used as a good support for controlled release of pesticides and medicinal drugs, adsorbent for cationic dyes, toxic substances and heavy metals effective adsorbent for radioactive and toxic industrial wastes,...

Casimir forces between defects in one-dimensional quantum liquids

NASA Astrophysics Data System (ADS)

Recati, A.; Fuchs, J. N.; Peça, C. S.; Zwerger, W.

2005-08-01

We discuss the effective interactions between two localized perturbations in one-dimensional quantum liquids. For noninteracting fermions, the interactions exhibit Friedel oscillations, giving rise to a Ruderman-Kittel-Kasuya-Yosida-type interaction familiar from impurity spins in metals. In the interacting case, at low energies, a Luttinger-liquid description applies. In the case of repulsive fermions, the Friedel oscillations of the interacting system are replaced, at long distances, by a universal Casimir-type interaction which depends only on the sound velocity and decays inversely with the separation. The Casimir-type interaction between localized perturbations embedded in a fermionic environment gives rise to a long-range coupling between quantum dots in ultracold Fermi gases, opening an alternative to couple qubits with neutral atoms. We also briefly discuss the case of bosonic quantum liquids in which the interaction between weak impurities turns out to be short ranged, decaying exponentially on the scale of the healing length.

Modification of the G-phonon mode of graphene by nitrogen doping

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

Lukashev, Pavel V., E-mail: pavel.lukashev@uni.edu; Hurley, Noah; Zhao, Liuyan

2016-01-25

The effect of nitrogen doping on the phonon spectra of graphene is analyzed. In particular, we employ first-principles calculations and scanning Raman analysis to investigate the dependence of phonon frequencies in graphene on the concentration of nitrogen dopants. We demonstrate that the G phonon frequency shows oscillatory behavior as a function of nitrogen concentration. We analyze different mechanisms which could potentially be responsible for this behavior, such as Friedel charge oscillations around the localized nitrogen impurity atom, the bond length change between nitrogen impurity and its nearest neighbor carbon atoms, and the long-range interactions of the nitrogen point defects. Wemore » show that the bond length change and the long range interaction of point defects are possible mechanisms responsible for the oscillatory behavior of the G frequency as a function of nitrogen concentration. At the same time, Friedel charge oscillations are unlikely to contribute to this behavior.« less

Balanced improvement of high performance concrete material properties with modified graphite nanomaterials

NASA Astrophysics Data System (ADS)

Peyvandi, Amirpasha

Graphite nanomaterials offer distinct features for effective reinforcement of cementitious matrices in the pre-crack and post-crack ranges of behavior. Thoroughly dispersed and well-bonded nanomaterials provide for effective control of the size and propagation of defects (microcracks) in matrix, and also act as closely spaced barriers against diffusion of moisture and aggressive solutions into concrete. Modified graphite nanomaterials can play multi-faceted roles towards enhancing the mechanical, physical and functional attributes of concrete materials. Graphite nanoplatelets (GP) and carbon nanofibers (CNF) were chosen for use in cementitious materials. Experimental results highlighted the balanced gains in diverse engineering properties of high-performance concrete realized by introduction of graphite nanomaterials. Nuclear Magnetic Resonance (NMR) spectroscopy was used in order to gain further insight into the effects of nanomaterials on the hydration process and structure of cement hydrates. NMR exploits the magnetic properties of certain atomic nuclei, and the sensitivity of these properties to local environments to generate data which enables determination of the internal structure, reaction state, and chemical environment of molecules and bulk materials. 27 Al and 29Si NMR spectroscopy techniques were employed in order to evaluate the effects of graphite nanoplatelets on the structure of cement hydrates, and their resistance to alkali-silica reaction (ASR), chloride ion diffusion, and sulfate attack. Results of 29Si NMR spectroscopy indicated that the percent condensation of C-S-H in cementitious paste was lowered in the presence of nanoplatelets at the same age. The extent of chloride diffusion was assessed indirectly by detecting Friedel's salt as a reaction product of chloride ions with aluminum-bearing cement hydrates. Graphite nanoplatelets were found to significantly reduce the concentration of Friedel's salt at different depths after various periods of exposure to chloride solutions, pointing at the benefits of nanoplatelets towards enhancement of concrete resistance to chloride ion diffusion. It was also found that the intensity of Thaumasite, a key species marking sulfate attack on cement hydrates, was lowered with the addition of graphite nanoplatelets in concrete exposed to sulfate solutions. Experimental evaluations were conducted on scaled-up production of concrete nanocomposite in precast concrete plants. Full-scale reinforced concrete pipes and beams were produced using concrete nanocomposites. Durability and structural tests indicated that the use of graphite nanoplatelets, alone or in combination with synthetic (PVA) fibers, produced significant gains in the durability characteristics, and also benefited the structural performance of precast reinforced concrete products. The material and scaled-up structural investigations conducted in the project concluded that lower-cost graphite nanomaterials (e.g., graphite nanoplatelets) offer significant potentials as multi-functional additives capable of enhancing the barrier, durability and mechanical performance of concrete materials. The benefits of graphite nanomaterials tend to be more pronounced in higher-performance concrete materials.

Edge-Functionalization of Pyrene as a Miniature Graphene via Friedel–Crafts Acylation Reaction in Poly(Phosphoric Acid)

PubMed Central

2010-01-01

The feasibility of edge-functionalization of graphite was tested via the model reaction between pyrene and 4-(2,4,6-trimethylphenyloxy)benzamide (TMPBA) in poly(phosphoric acid) (PPA)/phosphorous pentoxide (P2O5) medium. The functionalization was confirmed by various characterization techniques. On the basis of the model study, the reaction condition could be extended to the edge-functionalization of graphite with TMPBA. Preliminary results showed that the resultant TMPBA-grafted graphite (graphite-g-TMPBA) was found to be readily dispersible in N-methyl-2-pyrrolidone (NMP) and can be used as a precursor for edge-functionalized graphene (EFG). PMID:21076664

Deuterium-tritium pulse propulsion with hydrogen as propellant and the entire space-craft as a gigavolt capacitor for ignition

NASA Astrophysics Data System (ADS)

Winterberg, F.

2013-08-01

A deuterium-tritium (DT) nuclear pulse propulsion concept for fast interplanetary transport is proposed utilizing almost all the energy for thrust and without the need for a large radiator: By letting the thermonuclear micro-explosion take place in the center of a liquid hydrogen sphere with the radius of the sphere large enough to slow down and absorb the neutrons of the DT fusion reaction, heating the hydrogen to a fully ionized plasma at a temperature of ∼105 K. By using the entire spacecraft as a magnetically insulated gigavolt capacitor, igniting the DT micro-explosion with an intense GeV ion beam discharging the gigavolt capacitor, possible if the space craft has the topology of a torus.

Efficient CO 2 capture by a task-specific porous organic polymer bifunctionalized with carbazole and triazine groups

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

Zhu, Xiang; Mahurin, Shannon M.; An, Shu-Hao

2014-05-02

We synthesized a porous triazine and carbazole bifunctionalized task-specific polymer using a facile Friedel–Crafts reaction. We found that the resultant porous framework exhibited excellent CO 2 uptake (18.0 wt%, 273 K and 1 bar) and good adsorption selectivity for CO 2 over N 2.

Friedel's salt formation in sulfoaluminate cements: A combined XRD and {sup 27}Al MAS NMR study

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

Paul, G.; Boccaleri, E., E-mail: enrico.boccaleri@mfn.unipmn.it; Buzzi, L.

Four different binders based on calcium sulfoaluminate cements have been submitted to accelerated chlorination through ionic exchange on hydrated pastes, in order to investigate their ability to chemically bind chloride ions that might reduce chloride penetration. The composition of hydrated cements before and after the treatment was evaluated by means of an X-Ray Diffraction–{sup 27}Al Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy combined study, allowing to take into account even partially amorphous phases and to make quantitative assumption on the relative abundance of the different aluminium-containing phases. It was found that low SO{sub 3} Sulfoaluminate–Portland ternary systems are the mostmore » effective in binding chloride ions and the active role played by different members of the AFm family in chloride uptake was confirmed. Moreover, a peculiar behavior related to the formation of Friedel's salt in different pH conditions was also established for the different cements.« less

Strong Quantum Size Effects in Pb(111) Thin Films Mediated by Anomalous Friedel Oscillations

NASA Astrophysics Data System (ADS)

Jia, Yu; Wu, Biao; Li, Chong; Einstein, T. L.; Weitering, H. H.; Zhang, Zhenyu

2010-08-01

Using first-principles calculations within density functional theory, we study Friedel oscillations (FOs) in the electron density at different metal surfaces and their influence on the lattice relaxation and stability of ultrathin metal films. We show that the FOs at the Pb(111) surface decay as 1/x with the distance x from the surface, different from the conventional 1/x2 power law at other metal surfaces. The underlying physical reason for this striking difference is tied to the strong nesting of the two different Fermi sheets along the Pb(111) direction. The interference of the strong FOs emanating from the two surfaces of a Pb(111) film, in turn, not only results in superoscillatory interlayer relaxations around the center of the film, but also determines its stability in the quantum regime. As a simple and generic picture, the present findings also explain why quantum size effects are exceptionally robust in Pb(111) films.

Molecular characterization and phylogenetic analysis of two novel regio-specific flavonoid prenyltransferases from Morus alba and Cudrania tricuspidata.

PubMed

Wang, Ruishan; Chen, Ridao; Li, Jianhua; Liu, Xiao; Xie, Kebo; Chen, Dawei; Yin, Yunze; Tao, Xiaoyu; Xie, Dan; Zou, Jianhua; Yang, Lin; Dai, Jungui

2014-12-26

Prenylated flavonoids are attractive specialized metabolites with a wide range of biological activities and are distributed in several plant families. The prenylation catalyzed by prenyltransferases represents a Friedel-Crafts alkylation of the flavonoid skeleton in the biosynthesis of natural prenylated flavonoids and contributes to the structural diversity and biological activities of these compounds. To date, all identified plant flavonoid prenyltransferases (FPTs) have been identified in Leguminosae. In the present study two new FPTs, Morus alba isoliquiritigenin 3'-dimethylallyltransferase (MaIDT) and Cudrania tricuspidata isoliquiritigenin 3'-dimethylallyltransferase (CtIDT), were identified from moraceous plants M. alba and C. tricuspidata, respectively. MaIDT and CtIDT shared low levels of homology with the leguminous FPTs. MaIDT and CtIDT are predicted to be membrane-bound proteins with predicted transit peptides, seven transmembrane regions, and conserved functional domains that are similar to other homogentisate prenyltransferases. Recombinant MaIDT and CtIDT were able to regioselectively introduce dimethylallyl diphosphate into the A ring of three flavonoids with different skeleton types (chalcones, isoflavones, and flavones). Phylogenetic analysis revealed that MaIDT and CtIDT are distantly related to their homologs in Leguminosae, which suggests that FPTs in Moraceae and Leguminosae might have evolved independently. MaIDT and CtIDT represent the first two non-Leguminosae FPTs to be identified in plants and could thus lead to the identification of additional evolutionarily varied FPTs in other non-Leguminosae plants and could elucidate the biosyntheses of prenylated flavonoids in various plants. Furthermore, MaIDT and CtIDT might be used for regiospecific prenylation of flavonoids to produce bioactive compounds for potential therapeutic applications due to their high efficiency and catalytic promiscuity. © 2014 by The American Society for Biochemistry and Molecular Biology, Inc.

Molecular Characterization and Phylogenetic Analysis of Two Novel Regio-specific Flavonoid Prenyltransferases from Morus alba and Cudrania tricuspidata*

PubMed Central

Wang, Ruishan; Chen, Ridao; Li, Jianhua; Liu, Xiao; Xie, Kebo; Chen, Dawei; Yin, Yunze; Tao, Xiaoyu; Xie, Dan; Zou, Jianhua; Yang, Lin; Dai, Jungui

2014-01-01

Prenylated flavonoids are attractive specialized metabolites with a wide range of biological activities and are distributed in several plant families. The prenylation catalyzed by prenyltransferases represents a Friedel-Crafts alkylation of the flavonoid skeleton in the biosynthesis of natural prenylated flavonoids and contributes to the structural diversity and biological activities of these compounds. To date, all identified plant flavonoid prenyltransferases (FPTs) have been identified in Leguminosae. In the present study two new FPTs, Morus alba isoliquiritigenin 3′-dimethylallyltransferase (MaIDT) and Cudrania tricuspidata isoliquiritigenin 3′-dimethylallyltransferase (CtIDT), were identified from moraceous plants M. alba and C. tricuspidata, respectively. MaIDT and CtIDT shared low levels of homology with the leguminous FPTs. MaIDT and CtIDT are predicted to be membrane-bound proteins with predicted transit peptides, seven transmembrane regions, and conserved functional domains that are similar to other homogentisate prenyltransferases. Recombinant MaIDT and CtIDT were able to regioselectively introduce dimethylallyl diphosphate into the A ring of three flavonoids with different skeleton types (chalcones, isoflavones, and flavones). Phylogenetic analysis revealed that MaIDT and CtIDT are distantly related to their homologs in Leguminosae, which suggests that FPTs in Moraceae and Leguminosae might have evolved independently. MaIDT and CtIDT represent the first two non-Leguminosae FPTs to be identified in plants and could thus lead to the identification of additional evolutionarily varied FPTs in other non-Leguminosae plants and could elucidate the biosyntheses of prenylated flavonoids in various plants. Furthermore, MaIDT and CtIDT might be used for regiospecific prenylation of flavonoids to produce bioactive compounds for potential therapeutic applications due to their high efficiency and catalytic promiscuity. PMID:25361766

The meaning of craft: craft makers' descriptions of craft as an occupation.

PubMed

Pöllänen, Sinikka

2013-05-01

The aim of this study is to examine how craft makers describe the meaning of craft as an activity in relation to their well-being. The study is based on an analysis of the written narratives of 92 textile craft makers aged 16 to 84. Based on the results, the well-being enhancing nature of craft as a meaningful occupation for those interested in crafting is evident. The significance of craft making as an occupation is described by the following three themes: (a) "the meaning and value of crafts", (b) "the feelings experienced during craft activity", and (c) "the holisticity and intentionality of craft-making". As an activity and a metaphor, craft making helped the participants to adjust to life situations. Elements of craft that enhance well-being can be traced to both the artefacts and the sense of achievement gained in producing them. The effects of craft include personal growth, development of physical and cognitive skills, control of one's body, thoughts, and feelings, as well as cultural and social awareness. The results indicate that the participants noticed the significance of craft as an agony- and stress-reducing and mind-calming activity. Holistic craft and ordinary craft played different roles in maintaining well-being.

NEUTRON RADIOGRAPHY MEASUREMENT OF SALT SOLUTION ABSORPTION IN MORTAR.

PubMed

Lucero, Catherine L; Spragg, Robert P; Bentz, Dale P; Hussey, Daniel S; Jacobson, David L; Weiss, W Jason

2017-01-01

Some concrete pavements in the US have recently exhibited premature joint deterioration. It is hypothesized that one component of this damage can be attributed to a reaction that occurs when salt-laden water is absorbed in the concrete and reacts with the matrix. This study examines the absorption of CaCl 2 solution in mortar via neutron imaging. Mortar specimens were prepared with water to cement ratios, ( w/c ), of 0.36, 0.42 and 0.50 by mass and exposed to chloride solutions with concentrations ranging from 0 % to 29.8 % by mass. Depth of fluid penetration and moisture content along the specimen length were determined for 96 h after exposure. At high salt concentration (29.8 %), the sorption rate decreased by over 80 % in all samples. Along with changes in surface tension and viscosity, CaCl 2 reacts with the cement paste to produce products (Friedel's salt, Kuzel's salt, or calcium oxychloride) that block pores and reduce absorption.

Employees’ Perceived Opportunities to Craft and In-Role Performance: The Mediating Role of Job Crafting and Work Engagement

PubMed Central

van Wingerden, Jessica; Poell, Rob F.

2017-01-01

The present study was designed to gain knowledge of the relationship between employees’ perceived opportunities to craft, their actual job crafting behavior and, in line with JD-R theory, subsequently their work engagement and performance. Although scholars have suggested that employees’ perceived opportunities to craft their job may predict their actual job crafting behavior, which may have consequences for their well-being and performance, no study has examined the relationships between these variables. We collected data among a heterogeneous group of Dutch employees (N = 2090). Participants of the study reported their perceived opportunities to craft, job crafting behavior, work engagement and performance. Results indicated that individuals who experience a high level of opportunities to craft reported higher levels of job crafting behavior. In turn, perceived opportunities to craft and job crafting behavior related to higher levels of work engagement and subsequently performance. We discuss the implications of these findings for theory and practice. PMID:29118729

Employees' Perceived Opportunities to Craft and In-Role Performance: The Mediating Role of Job Crafting and Work Engagement.

PubMed

van Wingerden, Jessica; Poell, Rob F

2017-01-01

The present study was designed to gain knowledge of the relationship between employees' perceived opportunities to craft, their actual job crafting behavior and, in line with JD-R theory, subsequently their work engagement and performance. Although scholars have suggested that employees' perceived opportunities to craft their job may predict their actual job crafting behavior, which may have consequences for their well-being and performance, no study has examined the relationships between these variables. We collected data among a heterogeneous group of Dutch employees ( N = 2090). Participants of the study reported their perceived opportunities to craft, job crafting behavior, work engagement and performance. Results indicated that individuals who experience a high level of opportunities to craft reported higher levels of job crafting behavior. In turn, perceived opportunities to craft and job crafting behavior related to higher levels of work engagement and subsequently performance. We discuss the implications of these findings for theory and practice.

Online Career and Technical Education in the Community College

ERIC Educational Resources Information Center

Garza Mitchell, Regina L.

2017-01-01

Very little empirical research has been conducted about online career and technical education (CTE). Despite the continuing enrollment growth in online education (Lokken, 2016) and the national emphasis on CTE as a means of boosting the economy (D'Amico, Morgan, Katsinas, & Friedel, 2014), relatively little is understood about the scope and…

75 FR 60861 - Qualification of Drivers; Exemption Renewals; Vision

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-01

..., Riche Ford, Kelly L. Foster, Kevin J. Friedel, Donald W. Garner, Paul W. Goebel, Jr., Ronnie L. Hanback... J. Lewis, Velmer L. McClelland, Larry McCoy, Sr., Robert W. McMillian, Danny W. Nuckles, Richard A..., Robert M. Stewart, John L. Stone, Nils S. Thornberg, Daniel W. Toppings, Kenneth E. Valentine...

Center for Space and Earth Science

Science.gov Websites

Search Site submit Los Alamos National LaboratoryCenter for Space and Earth Science Part of the Partnerships NSEC » CSES Center for Space and Earth Science High quality, cutting-edge science in the areas of astrophysics, space physics, solid planetary geoscience, and Earth systems Contact Director Reiner Friedel (505

Theory of Friedel oscillations in monolayer graphene and group-VI dichalcogenides in a magnetic field

NASA Astrophysics Data System (ADS)

Rusin, Tomasz M.; Zawadzki, Wlodek

2018-05-01

Friedel oscillations (FO) of electron density caused by a deltalike neutral impurity in two-dimensional (2D) systems in a magnetic field are calculated. Three 2D cases are considered: free electron gas, monolayer graphene, and group-VI dichalcogenides. An exact form of the renormalized Green's function is used in the calculations, as obtained by a summation of the infinite Dyson series and regularization procedure. Final results are valid for large ranges of potential strengths V0, electron densities ne, magnetic fields B , and distances from the impurity r . Realistic models for the impurities are used. The first FO of induced density in WS2 are described by the relation Δ n (r ) ∝sin(2 π r /TFO) /r2 , where TFO∝1 /√{EF} . For weak impurity potentials, the amplitudes of FO are proportional to V0. For attractive potentials and high fields, the total electron density remains positive for all r . On the other hand, for low fields, repulsive potentials and small r , the total electron density may become negative, so that many-body effects should be taken into account.

Systems Analysis of Amphibious Landing Craft: Comparisons of Revised Designs of Advanced Landing Craft.

DTIC Science & Technology

AALC(AMPHIBIOUS ASSAULT LANDING CRAFT), AMPHIBIOUS ASSAULT LANDING CRAFT, DEBARKING, GAMUT MODEL, GENERAL PURPOSE SIMULATION SYSTEM, GPSS(GENERAL PURPOSE SIMULATION SYSTEM), IBM 360 COMPUTERS, LANDING CRAFT MIXES.

Contextualising Craft: Pedagogical Models for Craft Education

ERIC Educational Resources Information Center

Pollanen, Sinikka

2009-01-01

Craft education in Finland is, in many aspects, in a state of change. This concerns the independent position of craft as a school subject, the content of the compulsory craft courses containing textiles and technical work, the implementation of the new concept of a holistic craft process in the National Core Curriculum and so on. This bears…

Crafts and Craft Education as Expressions of Cultural Heritage: Individual Experiences and Collective Values among an International Group of Women University Students

ERIC Educational Resources Information Center

Kokko, Sirpa; Dillon, Patrick

2011-01-01

This paper explores relationships between crafts, craft education and cultural heritage as reflected in the individual experiences and collective values of fifteen female university students of different nationalities. The students (all trainee teachers) were following a course in crafts and craft education as part of an International Study…

Wireless Sensor Buoys for Perimeter Security of Military Vessels and Seabases

DTIC Science & Technology

2015-12-01

however, additional sensors utilizing modern technology and a self -forming, as well as self - healing , network could further diminish attacks against...Space SSDF Ship’s Self -Defense Force UAV Unmanned Aerial Vehicle UGS Unattended Ground Sensor USB Universal Serial Bus USMC United States Marine...conditions may delay their reaction resulting in the attacking surface craft entering into a critically close position. The Ship’s Self -Defense

Spacecraft capture and docking system

NASA Technical Reports Server (NTRS)

Kong, Kinyuen (Inventor); Rafeek, Shaheed (Inventor); Myrick, Thomas (Inventor)

2001-01-01

A system for capturing and docking an active craft to a passive craft has a first docking assembly on the active craft with a first contact member and a spike projecting outwardly, a second docking assembly on the passive craft having a second contact member and a flexible net deployed over a target area with an open mesh for capturing the end of the spike of the active craft, and a motorized net drive for reeling in the net and active craft to mate with the passive craft's docking assembly. The spike has extendable tabs to allow it to become engaged with the net. The net's center is coupled to a net spool for reeling in. An alignment funnel has inclined walls to guide the net and captured spike towards the net spool. The passive craft's docking assembly includes circumferentially spaced preload wedges which are driven to lock the wedges against the contact member of the active craft. The active craft's docking assembly includes a rotary table and drive for rotating it to a predetermined angular alignment position, and mating connectors are then engaged with each other. The system may be used for docking spacecraft in zero or low-gravity environments, as well as for docking underwater vehicles, docking of ancillary craft to a mother craft in subsonic flight, in-flight refueling systems, etc.

46 CFR 117.150 - Survival craft embarkation arrangements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Survival craft embarkation arrangements. 117.150 Section... EQUIPMENT AND ARRANGEMENTS Survival Craft Arrangements and Equipment § 117.150 Survival craft embarkation... apparatus when either— (1) The embarkation station for the survival craft is on a deck more than 4.5 meters...

46 CFR 199.201 - Survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Survival craft. 199.201 Section 199.201 Shipping COAST... craft. (a) Each survival craft must be approved and equipped as follows: (1) Each lifeboat must be... addition to the survival craft required in paragraph (b)(1) of this section, additional liferafts must be...

46 CFR 108.540 - Survival craft muster and embarkation arrangements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Survival craft muster and embarkation arrangements. 108... OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.540 Survival craft muster and... craft muster station and embarkation station for a survival craft which is boarded before it is launched...

46 CFR 117.204 - Survival craft-vessels operating on coastwise routes.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Survival craft-vessels operating on coastwise routes... PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Number and Type of Survival Craft § 117.204 Survival craft... allowed, the following survival craft requirements apply when not engaged in an overnight voyage: (1...

Sounding Equipment Studies,

DTIC Science & Technology

1967-11-06

considered: 1. Single sounding head per craft r2. Multiple sounding heads per craft (paravanes I; or bar) 3. Mother craft-manned daughter boats 4... Mother craft-unmanned daughter boats S.... 5. Craft refueling at mother ship 6. Craft refueling (and crew change) by logistics boat. 4 - śI 7. Various...sensor costs, then are simply C = KmCs L/Ls msnh sn (27)i n where L = Useful life of sensorsn KM = 1.0 plus fraction of cost allocated to repair

46 CFR 117.130 - Stowage of survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Stowage of survival craft. 117.130 Section 117.130... AND ARRANGEMENTS Survival Craft Arrangements and Equipment § 117.130 Stowage of survival craft. (a) Each survival craft must be: (1) Secured to the vessel by a painter with a float-free link permanently...

46 CFR 199.130 - Stowage of survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Stowage of survival craft. 199.130 Section 199.130... craft. (a) General. Each survival craft must be stowed— (1) As close to the accommodation and service spaces as possible; (2) So that neither the survival craft nor its stowage arrangements will interfere...

46 CFR 117.206 - Survival craft-vessels operating on Great Lakes routes.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Survival craft-vessels operating on Great Lakes routes... PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Number and Type of Survival Craft § 117.206 Survival craft... vessel certificated to operate on a Great Lakes route must be provided with the survival craft required...

46 CFR 180.130 - Stowage of survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Stowage of survival craft. 180.130 Section 180.130... TONS) LIFESAVING EQUIPMENT AND ARRANGEMENTS Survival Craft Arrangements and Equipment § 180.130 Stowage of survival craft. (a) Each survival craft must be: (1) Secured to the vessel by a painter with a...

Analysis on online word-of-mouth of customer satisfaction in cultural and creative industries of Taiwan: using crafts as an example

NASA Astrophysics Data System (ADS)

Tsai, Li-Fen; Shaw, Jing-Chi; Wang, Pei-Wen; Shih, Meng-Long; Yang, Min-Chieh

2011-10-01

This study aims to analyze customers' online word-of-mouth for crafts in Cultural and Creative Industries of Taiwan, and extracts articles from Yahoo and Wretch Blogs by the online writing mining technique. The research scope is from Jan. 1, 2008 to Dec. 31, 2010. The subjects include 2457 valid articles on customers' online word-of-mouth regarding the craft industry of Taiwan. Findings demonstrate that, regarding online word-of-mouth, the most important word-of-mouth items of ceramics, stone craft, wood craft manufacturing, and metal craft is decoration and display of surroundings; while brand is valued in glass craft; and the most important item for consumers of paper craft is cultural characteristics of handicrafts.

Approximate solution for the electronic density profile at the surface of jellium

NASA Astrophysics Data System (ADS)

Schmickler, Wolfgang; Henderson, Douglas

1984-09-01

A simple family of trial functions for the electronic density at the surface of jellium, which accounts for Friedel oscillations and incorporates the Budd-Vannimenus theorem, is proposed. The free parameters are determined by energy minimization. Model calculations give good results for the work function and for the induced surface charge in the presence of an external field.

46 CFR 28.310 - Launching of survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 1 2010-10-01 2010-10-01 false Launching of survival craft. 28.310 Section 28.310... Operate With More Than 16 Individuals on Board § 28.310 Launching of survival craft. A gate or other... each survival craft which weighs more than 110 pounds (489 Newtons), to allow the survival craft to be...

47 CFR 80.223 - Special requirements for survival craft stations.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 5 2010-10-01 2010-10-01 false Special requirements for survival craft... requirements for survival craft stations. (a) Survival craft stations capable of transmitting on: (1) 2182 kHz... operate with A3E or A3N emission. (b) Survival craft stations must be able to receive the frequency and...

46 CFR 117.205 - Survival craft-vessels operating on limited coastwise routes.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Survival craft-vessels operating on limited coastwise... PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Number and Type of Survival Craft § 117.205 Survival craft... the survival craft required by §§ 117.204 (a) through (d) of this part, as applicable. (b) Each vessel...

Friedel oscillation near a van Hove singularity in two-dimensional Dirac materials

NASA Astrophysics Data System (ADS)

Lu, Chi-Ken

2016-02-01

We consider Friedel oscillation in the two-dimensional Dirac materials when the Fermi level is near the van Hove singularity. Twisted graphene bilayer and the surface state of topological crystalline insulator are the representative materials which show low-energy saddle points that are feasible to probe by gating. We approximate the Fermi surface near saddle point with a hyperbola and calculate the static Lindhard response function. Employing a theorem of Lighthill, the induced charge density δ n due to an impurity is obtained and the algebraic decay of δ n is determined by the singularity of the static response function. Although a hyperbolic Fermi surface is rather different from a circular one, the static Lindhard response function in the present case shows a singularity similar with the response function associated with circular Fermi surface, which leads to the δ n\\propto {{R}-2} at large distance R. The dependences of charge density on the Fermi energy are different. Consequently, it is possible to observe in twisted graphene bilayer the evolution that δ n\\propto {{R}-3} near Dirac point changes to δ n\\propto {{R}-2} above the saddle point. Measurements using scanning tunnelling microscopy around the impurity sites could verify the prediction.

Crafting in context: Exploring when job crafting is dysfunctional for performance effectiveness.

PubMed

Dierdorff, Erich C; Jensen, Jaclyn M

2018-05-01

Job crafting theory purports that the consequences of revising one's work role can be simultaneously beneficial and detrimental. Previous research, however, has almost exclusively emphasized the beneficial outcomes of job crafting. In the current study, we proposed dysfunctional consequences of crafting for performance-related outcomes in the form of a U-shaped relationship between job crafting and performance effectiveness (managerial ratings of job proficiency and peer ratings of citizenship behavior). We further predicted that elements of the task context (autonomy and ambiguity) and the social context (interdependence and social support) moderate these curvilinear relationships. Consistent with previous research, job crafting displayed positive and linear effects on work-related attitudes (job satisfaction and affective commitment). Consistent with our predictions, moderate levels of crafting were associated with dysfunctional performance-related outcomes and features of work context either exacerbated or dissipated these dysfunctional consequences of job crafting for individuals. (PsycINFO Database Record (c) 2018 APA, all rights reserved).

The meanings of craft to an occupational therapist.

PubMed

Harris, Emma

2008-06-01

Craft was the first therapeutic occupation of occupational therapy. Since the early days of the profession, the value of craft in practice is a topic that has been discussed with fluctuating interest. Recent discussions by occupational therapists have reinforced that although craft is relevant to occupational therapy, there are uncertainties about its place in contemporary practice. Presently, scholars have identified that occupation is both the center of human experience and the core of our profession. Therefore, this study aimed to begin to clarify the meaning of craft to practice today by gaining a deep understanding of the meanings that one occupational therapist attributes to craft. Using narrative inquiry, data were gathered through a conversation held between the research participant and myself. A reflexive journal was also kept to support this data gathering process. Narrative analysis enabled intimate engagement with the data and the emergence of themes and sub-themes. The findings, in the form of an interpretive story, suggest first, that craft-making has therapeutic value; second, that reasoning about the therapeutic use of craft is similar to reasoning about other therapeutic activities; and third, that personal experience with craft-making can influence the selection of craft as therapeutic media. From this study, further research into the impact personal and professional experiences can have on choice of therapeutic media and an analysis of the sociopolitical context of the meanings that occupational therapists attribute to craft-making is suggested.

33 CFR 149.310 - What are the muster and embarkation requirements for survival craft?

Code of Federal Regulations, 2010 CFR

2010-07-01

... embarkation requirements for survival craft? 149.310 Section 149.310 Navigation and Navigable Waters COAST... and embarkation requirements for survival craft? Muster and embarkation arrangements for survival craft must comply with 46 CFR 108.540. ...

25 CFR 309.1 - How do the regulations in this part carry out the Indian Arts and Crafts Act of 1990?

Code of Federal Regulations, 2011 CFR

2011-04-01

... Arts and Crafts Act of 1990? 309.1 Section 309.1 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.1 How do the regulations in this part carry out the Indian Arts and Crafts Act of 1990? These regulations define the nature and Indian origin...

25 CFR 309.9 - When can non-Indians make and sell products in the style of Indian arts and crafts?

Code of Federal Regulations, 2011 CFR

2011-04-01

... of Indian arts and crafts? 309.9 Section 309.9 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.9 When can non-Indians make and sell products in the style of Indian arts and crafts? A non-Indian can make and sell products in the style of...

25 CFR 309.9 - When can non-Indians make and sell products in the style of Indian arts and crafts?

Code of Federal Regulations, 2010 CFR

2010-04-01

... of Indian arts and crafts? 309.9 Section 309.9 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.9 When can non-Indians make and sell products in the style of Indian arts and crafts? A non-Indian can make and sell products in the style of...

25 CFR 309.1 - How do the regulations in this part carry out the Indian Arts and Crafts Act of 1990?

Code of Federal Regulations, 2010 CFR

2010-04-01

... Arts and Crafts Act of 1990? 309.1 Section 309.1 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.1 How do the regulations in this part carry out the Indian Arts and Crafts Act of 1990? These regulations define the nature and Indian origin...

Computer Technology-Integrated Projects Should not Supplant Craft Projects in Science Education

NASA Astrophysics Data System (ADS)

Klopp, Tabatha J.; Rule, Audrey C.; Suchsland Schneider, Jean; Boody, Robert M.

2014-03-01

The current emphasis on computer technology integration and narrowing of the curriculum has displaced arts and crafts. However, the hands-on, concrete nature of craft work in science modeling enables students to understand difficult concepts and to be engaged and motivated while learning spatial, logical, and sequential thinking skills. Analogy use is also helpful in understanding unfamiliar, complex science concepts. This study of 28 academically advanced elementary to middle-school students examined student work and perceptions during a science unit focused on four fossil organisms: crinoid, brachiopod, horn coral and trilobite. The study compared: (1) analogy-focused instruction to independent Internet research and (2) computer technology-rich products to crafts-based products. Findings indicate student products were more creative after analogy-based instruction and when made using technology. However, students expressed a strong desire to engage in additional craft work after making craft products and enjoyed making crafts more after analogy-focused instruction. Additionally, more science content was found in the craft products than the technology-rich products. Students expressed a particular liking for two of the fossil organisms because they had been modeled with crafts. The authors recommend that room should be retained for crafts in the science curriculum to model science concepts.

47 CFR 80.271 - Technical requirements for portable survival craft radiotelephone transceivers.

Code of Federal Regulations, 2010 CFR

2010-10-01

... craft radiotelephone transceivers. 80.271 Section 80.271 Telecommunication FEDERAL COMMUNICATIONS... Authorization for Compulsory Ships § 80.271 Technical requirements for portable survival craft radiotelephone transceivers. (a) Portable survival craft radiotelephone transceivers must comply with the following: (1) The...

Major Naval Operations

DTIC Science & Technology

2008-09-01

ing craft, while four combat craft (two tor- pedo craft and two light patrol craft) were captured in Port of Adabia. 5. Hartmut Zehrer, ed., Der...Collaborative planning is made possible by information technologies that allow the real-time exchange of information by voice and video . It greatly

Craft vs. industrial: Habits, attitudes and motivations towards beer consumption in Mexico.

PubMed

Gómez-Corona, Carlos; Escalona-Buendía, Héctor B; García, Mauricio; Chollet, Sylvie; Valentin, Dominique

2016-01-01

Food choices tend to be stable over time; they do not change fast, since consumers tend to act like creatures of habits. However, food habits can evolve, like currently the craft beer category. A change of habits involves a change of perception towards a product. Therefore, what is changing in the perception of beer? Two studies were conducted to address this question. First study was preliminary and aimed at exploring beer consumption habits in Mexico and a better understanding of craft beer representation among beer users. A questionnaire was administrated to 207 consumers in Mexico City during a beer festival. Results showed that respondents could be classified in: industrial beer (41.1%), occasional industrial (24.1%), and craft beer (34.8%) consumers. Craft cluster included mostly 25-35 years old men with high-income level. Among the craft beers cited by respondents from this cluster some are industrial, suggesting that the concept of craft beer might not be well defined, or defined in ideological terms. The second and main study was conducted using consumer ethnographies to understand the motivations and benefits of craft beer consumption. Opposite to industrial, craft beer emerges as an experience-based and symbolic product rather than a utilitarian one. The main motivation for drinking craft beer seems to be the quest of authenticity. Respondents' motivations to drink craft beer are generated by three important factors: desire for more knowledge, new taste experiences, and move away from the mainstream beer consumption. Craft consumers do not drink the product for its functional attributes, they consume it for what it means and as a consequence they build an identity, perceived as more authentic and unique, in comparison to the mainstream industrial beer consumption in Mexico. Copyright © 2015 Elsevier Ltd. All rights reserved.

Lewis Acid Pairs for the Activation of Biomass-derived Oxygenates in Aqueous Media

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

Roman, Yuriy

2015-09-14

The objective of this project is to understand the mechanistic aspects behind the cooperative activation of oxygenates by catalytic pairs in aqueous media. Specifically, we will investigate how the reactivity of a solid Lewis acid can be modulated by pairing the active site with other catalytic sites at the molecular level, with the ultimate goal of enhancing activation of targeted functional groups. Although unusual catalytic properties have been attributed to the cooperative effects promoted by such catalytic pairs, virtually no studies exist detailing the use heterogeneous water-tolerant Lewis pairs. A main goal of this work is to devise rational pathwaysmore » for the synthesis of porous heterogeneous catalysts featuring isolated Lewis pairs that are active in the transformation of biomass-derived oxygenates in the presence of bulk water. Achieving this technical goal will require closely linking advanced synthesis techniques; detailed kinetic and mechanistic investigations; strict thermodynamic arguments; and comprehensive characterization studies of both materials and reaction intermediates. For the last performance period (2014-2015), two technical aims were pursued: 1) C-C coupling using Lewis acid and base pairs in Lewis acidic zeolites. Tin-, zirconium-, and hafnium containing zeolites (e.g., Sn-, Zr-, and Hf-Beta) are versatile solid Lewis acids that selectively activate carbonyl functional groups. In this aim, we demonstrate that these zeolites catalyze the cross-aldol condensation of aromatic aldehydes with acetone under mild reaction conditions with near quantitative yields. NMR studies with isotopically labeled molecules confirm that acid-base pairs in the Si-O-M framework ensemble promote soft enolization through α-proton abstraction. The Lewis acidic zeolites maintain activity in the presence of water and, unlike traditional base catalysts, in acidic solutions. 2) One-pot synthesis of MWW zeolite nanosheets for activation of bulky substrates. Through post-synthetic modifications, layered zeolite precursors can be transformed into 2-dimensional (2D), zeolites with open architectures. These novel hierarchical microporous/mesoporous materials with exposed active sites can facilitate the conversion of bulky substrates while maintaining higher stability than amorphous mesoporous materials. However, post-synthetic exfoliation techniques are energy intensive, multi-step and require highly alkaline conditions that result in low silica yields and a partially amorphous product. In this aim, we demonstrate an effective one-pot synthesis method to generate exfoliated single-unit-cell thick MWW nanosheets. The new material, named MIT-1, is synthesized using a rationally-designed OSDA and results in a material with high crystallinity, surface area, and acidity that does not require post-synthetic treatments other than calcination. A parametric study of Al, Na, and water content reveals that MIT-1 crystallizes over a wide synthetic window. Characterization data show that MIT-1 has high mesoporosity with an external surface area exceeding 500 m2g-1 and a high external acid site density of 21 x 10-5 mol g-1. Catalytic tests demonstrate that MIT-1 has three-fold higher catalytic activity for the Friedel-Crafts alkylation of benzene with benzyl alcohol as compared to that of other 3D MWW topology zeolites.« less

46 CFR 180.150 - Survival craft embarkation arrangements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Survival craft embarkation arrangements. 180.150 Section... (UNDER 100 GROSS TONS) LIFESAVING EQUIPMENT AND ARRANGEMENTS Survival Craft Arrangements and Equipment § 180.150 Survival craft embarkation arrangements. (a) A launching appliance approved under approval...

Job Crafting, Employee Well-being, and Quality of Care.

PubMed

Yepes-Baldó, Montserrat; Romeo, Marina; Westerberg, Kristina; Nordin, Maria

2018-01-01

The main objective is to study the effects of job crafting activities of elder care and nursing home employees on their perceived well-being and quality of care in two European countries, Spain and Sweden. The Job Crafting, the General Health, and the Quality of Care questionnaires were administered to 530 employees. Correlations and hierarchical regression analyses were performed. Results confirm the effects of job crafting on quality of care ( r = .291, p < .01; β = .261, p < .01; Δ R 2 = .065, p < .01) and employees' well-being ( r = .201, p < .01; β = .171, p < .01; Δ R 2 = .028, p < .01). A positive linear relationship was found between job crafting and well-being in Spain and Sweden and with quality of care in Spain. On the contrary, in Sweden, the relationship between job crafting and well-being was not linear. Job crafting contributes significantly to employees' and residents' well-being. Management should promote job crafting to co-create meaningful and productive work. Cultural effects are proposed to explain the differences found.

46 CFR 185.518 - Inflatable survival craft placards.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Inflatable survival craft placards. 185.518 Section 185... 100 GROSS TONS) OPERATIONS Preparations for Emergencies § 185.518 Inflatable survival craft placards. (a) Every vessel equipped with an inflatable survival craft must have approved placards or other...

46 CFR 133.105 - Survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Survival craft. 133.105 Section 133.105 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS LIFESAVING SYSTEMS Requirements for All OSVs § 133.105 Survival craft. (a) Each survival craft must be approved and equipped as...

46 CFR 122.518 - Inflatable survival craft placards.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Inflatable survival craft placards. 122.518 Section 122... Preparations for Emergencies § 122.518 Inflatable survival craft placards. (a) Every vessel equipped with an inflatable survival craft must have approved placards or other cards containing instructions for launching...

46 CFR 199.280 - Survival craft embarkation and launching arrangements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Survival craft embarkation and launching arrangements... Cargo Vessels § 199.280 Survival craft embarkation and launching arrangements. (a) Each lifeboat must be.... (d) All survival craft required for abandonment by the total number of persons on board must be...

46 CFR 133.110 - Survival craft muster and embarkation arrangements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Survival craft muster and embarkation arrangements. 133... VESSELS LIFESAVING SYSTEMS Requirements for All OSVs § 133.110 Survival craft muster and embarkation... lighting supplied from the emergency source of electrical power. (e) Each davit-launched survival craft...

46 CFR 108.525 - Survival craft number and arrangement.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Survival craft number and arrangement. 108.525 Section... UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.525 Survival craft number and arrangement. (a... arrangement of survival craft: (1) Lifeboats with an aggregate capacity to accommodate the total number of...

46 CFR 108.530 - Stowage of survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Stowage of survival craft. 108.530 Section 108.530... AND EQUIPMENT Lifesaving Equipment § 108.530 Stowage of survival craft. (a) General. Each survival craft required to be served by a launching appliance or marine evacuation system must be stowed as...

47 CFR 97.215 - Telecommand of model craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 47 Telecommunication 5 2010-10-01 2010-10-01 false Telecommand of model craft. 97.215 Section 97... AMATEUR RADIO SERVICE Special Operations § 97.215 Telecommand of model craft. An amateur station transmitting signals to control a model craft may be operated as follows: (a) The station identification...

46 CFR 199.245 - Survival craft embarkation and launching arrangements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Survival craft embarkation and launching arrangements... Passenger Vessels § 199.245 Survival craft embarkation and launching arrangements. (a) Each davit-launched liferaft must be arranged to be rapidly boarded by its full complement of persons. (b) All survival craft...

46 CFR 199.261 - Survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Survival craft. 199.261 Section 199.261 Shipping COAST... SYSTEMS FOR CERTAIN INSPECTED VESSELS Additional Requirements for Cargo Vessels § 199.261 Survival craft. (a) Each survival craft must be approved and equipped as follows: (1) Each lifeboat must be a totally...

46 CFR 28.125 - Stowage of survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 1 2010-10-01 2010-10-01 false Stowage of survival craft. 28.125 Section 28.125... FISHING INDUSTRY VESSELS Requirements for All Vessels § 28.125 Stowage of survival craft. (a) Each..., inflatable buoyant apparatus, and any auxiliary craft used in their place, must be kept readily accessible...

33 CFR 401.58 - Pleasure craft scheduling.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Pleasure craft scheduling. 401.58... OF TRANSPORTATION SEAWAY REGULATIONS AND RULES Regulations Seaway Navigation § 401.58 Pleasure craft scheduling. (a) The transit of pleasure craft shall be scheduled by the traffic controller or the officer in...

46 CFR 24.15-5 - Canadian pleasure craft temporarily using navigable waters of the United States.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 1 2010-10-01 2010-10-01 false Canadian pleasure craft temporarily using navigable... SECURITY UNINSPECTED VESSELS GENERAL PROVISIONS Equivalents § 24.15-5 Canadian pleasure craft temporarily using navigable waters of the United States. Uninspected Canadian pleasure craft (uninspected vessels...

29 CFR 1202.8 - Hearings on craft or class.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 29 Labor 4 2010-07-01 2010-07-01 false Hearings on craft or class. 1202.8 Section 1202.8 Labor... craft or class. In the event the contesting parties or organizations are unable to agree on the..., specifying the craft or class of employees eligible to participate in the designation of representatives. ...

33 CFR 150.515 - What are the requirements for weight testing of newly installed or relocated craft?

Code of Federal Regulations, 2010 CFR

2010-07-01

... weight testing of newly installed or relocated craft? 150.515 Section 150.515 Navigation and Navigable... testing of newly installed or relocated craft? (a) The operator must perform installation weight testing... (a) of this section, when survival crafts are relocated to another deepwater port. ...

46 CFR 28.805 - Launching of survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 1 2010-10-01 2010-10-01 false Launching of survival craft. 28.805 Section 28.805... FISHING INDUSTRY VESSELS Aleutian Trade Act Vessels § 28.805 Launching of survival craft. In addition to the survival craft requirements in subpart B, each vessel must have a gate or other opening in the...

46 CFR 133.105 - Survival craft.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 4 2011-10-01 2011-10-01 false Survival craft. 133.105 Section 133.105 Shipping COAST... Requirements for All OSVs § 133.105 Survival craft. (a) Each survival craft must be approved and equipped as... be approved under approval series 160.118 and be equipped as specified in table 133.175 of this part...

46 CFR 133.105 - Survival craft.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Survival craft. 133.105 Section 133.105 Shipping COAST... Requirements for All OSVs § 133.105 Survival craft. (a) Each survival craft must be approved and equipped as... be approved under approval series 160.118 and be equipped as specified in table 133.175 of this part...

46 CFR 133.105 - Survival craft.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Survival craft. 133.105 Section 133.105 Shipping COAST... Requirements for All OSVs § 133.105 Survival craft. (a) Each survival craft must be approved and equipped as... be approved under approval series 160.118 and be equipped as specified in table 133.175 of this part...

Absolutely Write! Teaching the Craft Elements of Writing. Bill Harp Professional Teachers Library.

ERIC Educational Resources Information Center

Thomason, Tommy; York, Carol

This book discusses basic craft elements of writing, illustrates from adult and children's literature what constitutes an engaging passage of description, and then illustrates how that craft can be taught in a workshop environment. In addition, this book includes involvement experiences that help teachers experience these craft elements. After an…

46 CFR 199.220 - Survival craft and rescue boat embarkation arrangements.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Survival craft and rescue boat embarkation arrangements... Passenger Vessels § 199.220 Survival craft and rescue boat embarkation arrangements. (a) Survival craft... rescue boat must be able to be boarded and launched directly from the stowed position with the number of...

46 CFR 199.220 - Survival craft and rescue boat embarkation arrangements.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 7 2012-10-01 2012-10-01 false Survival craft and rescue boat embarkation arrangements... Passenger Vessels § 199.220 Survival craft and rescue boat embarkation arrangements. (a) Survival craft... rescue boat must be able to be boarded and launched directly from the stowed position with the number of...

46 CFR 199.220 - Survival craft and rescue boat embarkation arrangements.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 7 2014-10-01 2014-10-01 false Survival craft and rescue boat embarkation arrangements... Passenger Vessels § 199.220 Survival craft and rescue boat embarkation arrangements. (a) Survival craft... rescue boat must be able to be boarded and launched directly from the stowed position with the number of...

46 CFR 199.220 - Survival craft and rescue boat embarkation arrangements.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 46 Shipping 7 2013-10-01 2013-10-01 false Survival craft and rescue boat embarkation arrangements... Passenger Vessels § 199.220 Survival craft and rescue boat embarkation arrangements. (a) Survival craft... rescue boat must be able to be boarded and launched directly from the stowed position with the number of...

46 CFR 199.220 - Survival craft and rescue boat embarkation arrangements.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 7 2011-10-01 2011-10-01 false Survival craft and rescue boat embarkation arrangements... Passenger Vessels § 199.220 Survival craft and rescue boat embarkation arrangements. (a) Survival craft... rescue boat must be able to be boarded and launched directly from the stowed position with the number of...

Craft Artist Membership Organizations 1978. Report No. 13.

ERIC Educational Resources Information Center

National Endowment for the Arts, Washington, DC. Research Div.

To describe what has been learned about craft membership organizations is the goal of this research report, which utilizes data collected in a nationwide survey of craft organizations. Specific purposes of the study were aimed at developing a better understanding of U.S. craft artists and organizations. Findings indicated that a typical craft…

Development of Interactive Multimedia Courseware (e-CRAFT) for Craft Education

ERIC Educational Resources Information Center

Osman, Salyani; Sahari, Noraidah; Zin, Nor Azan Mat

2012-01-01

The way of teaching and learning traditional crafts have always used traditional apprenticeship learning methods where the expert facilitates transfer of practice skill sets to novices. As a craft has been taught in conventional approach, the students and experts have been facing several problems especially when expert needs to teach a group of…

Heat transfer and pressure drop of condensation of hydrocarbons in tubes

NASA Astrophysics Data System (ADS)

Fries, Simon; Skusa, Severin; Luke, Andrea

2018-03-01

The heat transfer coefficient and pressure drop are investigated for propane. Two different mild steel plain tubes and saturation pressures are considered for varying mass flux and vapour quality. The pressure drop is compared to the Friedel-Correlation with two different approaches to determine the friction factor. The first is calculation as proposed by Friedel and the second is through single phase pressure drop investigations. For lower vapour qualities the experimental results are in better agreement with the approach of the calculated friction factor. For higher vapour qualities the experimental friction factor is more precise. The pressure drop increases for a decreasing tube diameter and saturation pressure. The circumferential temperature profile and heat transfer coefficients are shown for a constant vapour quality at varying mass fluxes. The subcooling is highest for the bottom of the tube and lowest for the top. The average subcooling as well as the circumferential deviation decreases for rising mass fluxes. The averaged heat transfer coefficients are compared to the model proposed by Thome and Cavallini. The experimental results are in good agreement with both correlations, however the trend is better described with the correlation from Thome. The experimental heat transfer coefficients are under predicted by Thome and over predicted by Cavallini.

Dark-field phase retrieval under the constraint of the Friedel symmetry in coherent X-ray diffraction imaging.

PubMed

Kobayashi, Amane; Sekiguchi, Yuki; Takayama, Yuki; Oroguchi, Tomotaka; Nakasako, Masayoshi

2014-11-17

Coherent X-ray diffraction imaging (CXDI) is a lensless imaging technique that is suitable for visualizing the structures of non-crystalline particles with micrometer to sub-micrometer dimensions from material science and biology. One of the difficulties inherent to CXDI structural analyses is the reconstruction of electron density maps of specimen particles from diffraction patterns because saturated detector pixels and a beam stopper result in missing data in small-angle regions. To overcome this difficulty, the dark-field phase-retrieval (DFPR) method has been proposed. The DFPR method reconstructs electron density maps from diffraction data, which are modified by multiplying Gaussian masks with an observed diffraction pattern in the high-angle regions. In this paper, we incorporated Friedel centrosymmetry for diffraction patterns into the DFPR method to provide a constraint for the phase-retrieval calculation. A set of model simulations demonstrated that this constraint dramatically improved the probability of reconstructing correct electron density maps from diffraction patterns that were missing data in the small-angle region. In addition, the DFPR method with the constraint was applied successfully to experimentally obtained diffraction patterns with significant quantities of missing data. We also discuss this method's limitations with respect to the level of Poisson noise in X-ray detection.

Taking control: Is job crafting related to the intention to leave surgical training?

PubMed

Dominguez, Luis Carlos; Stassen, Laurents; de Grave, Willem; Sanabria, Alvaro; Alfonso, Edgar; Dolmans, Diana

2018-01-01

The intention to leave surgical training, hereinafter referred as proxy of "attrition," is associated with poor well-being in the workplace. Attrition is suggested to diminish when residents possess job-crafting skills, that is, the ability to redefine their job in meaningful ways and maximize well-being at work by increasing structural and social resources and challenges and decreasing hindering demands. However, the evidence supporting this relationship is scant. This study sought to: 1) investigate to what extent residents possess job-crafting skills and compare residents' levels of job-crafting skills across years of residency training; 2) investigate the relationship between job crafting, well-being as measured by burnout and work-engagement rates, and the intention to leave; and 3) compare the levels of job-crafting skills and well-being between residents with and without serious intentions to leave. This cross sectional study was conducted in fifteen residency programs in Colombia. Surgical residents completed different questionnaires including the Dutch Job Crafting Scale (DJCS), MBI-Human Services Survey (MBI-HSS), Utrecht Work Engagement Scale (UWES-17) and an adapted version of the Nurse Turnover Intention Scale (NTIS). The objectives were addressed by independent analyses of variance (ANOVA), structural equation modeling techniques (SEM) and independent t-tests, respectively. A total of 202 residents participated. Residents generally scored high on their job-crafting skills to increase structural and social resources as well as challenging demands, but were less positive about their skills to reduce hindering demands. No differences across years of training were found. Job crafting correlated positively with work-engagement, which was inversely related to the intention to leave. Conversely, job crafting correlated negatively with burnout, which bore a positive relationship to the intention to leave. Residents with serious intentions to leave exhibited lower levels of most job-crafting skills and work-engagement, compared to those without such intentions. This study adds evidence that attrition is a process mediated by residents' well being at work, which can be molded by their job-crafting endeavors. Future research is needed to evaluate the effectiveness of interventions aimed at cultivating resident's job-crafting abilities in order to reduce attrition.

46 CFR 180.206 - Survival craft-vessels operating on Great Lakes routes.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Survival craft-vessels operating on Great Lakes routes... Craft § 180.206 Survival craft—vessels operating on Great Lakes routes. (a) Except as allowed by... with the survival craft required by § 180.205 (a) through (e), as appropriate. (b) Each vessel...

46 CFR 180.205 - Survival craft-vessels operating on limited coastwise routes.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Survival craft-vessels operating on limited coastwise... Craft § 180.205 Survival craft—vessels operating on limited coastwise routes. (a) Except as allowed by... survival craft required by § 180.204(d). (e) Each vessel certificated to operate on a limited coastwise...

46 CFR 25.25-17 - Survival craft requirements for uninspected passenger vessels of at least 100 gross tons.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 1 2010-10-01 2010-10-01 false Survival craft requirements for uninspected passenger... Survival craft requirements for uninspected passenger vessels of at least 100 gross tons. (a) Each uninspected passenger vessel of at least 100 gross tons must have adequate survival craft with enough capacity...

33 CFR 125.15 - Access to waterfront facilities, and port and harbor areas, including vessels and harbor craft...

Code of Federal Regulations, 2010 CFR

2010-07-01

..., and port and harbor areas, including vessels and harbor craft therein. 125.15 Section 125.15....15 Access to waterfront facilities, and port and harbor areas, including vessels and harbor craft....09 to those waterfront facilities, and port and harbor areas, including vessels and harbor craft...

33 CFR 149.305 - What are the survival craft requirements for temporary personnel?

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false What are the survival craft... EQUIPMENT Lifesaving Equipment Manned Deepwater Port Requirements § 149.305 What are the survival craft... complement exceeds the capacity of the survival craft required under § 149.304 of this subpart, the port must...

33 CFR 149.313 - How must survival craft be arranged?

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false How must survival craft be... Equipment Manned Deepwater Port Requirements § 149.313 How must survival craft be arranged? The operator must arrange survival craft so that they meet the requirements of 46 CFR 108.525 (a) and § 108.530 and...

Learning Crafts as Practices of Masculinity. Finnish Male Trainee Teachers' Reflections and Experiences

ERIC Educational Resources Information Center

Kokko, Sirpa

2012-01-01

Craft education in Finland has long gendered traditions that effect the present situation. The aim of this paper is to analyse the processes of learning the interlinking of crafts and gender. The analysis concentrates on male trainee teachers' experiences of craft education in comprehensive schools in Finland. Data were collected through memory…

46 CFR 133.130 - Stowage of survival craft.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Stowage of survival craft. 133.130 Section 133.130... SYSTEMS Requirements for All OSVs § 133.130 Stowage of survival craft. (a) General. Each survival craft... will not slip off, and meets the requirements of § 133.105(a)(4)(iii). (3) If lifefloats are arranged...

46 CFR 133.130 - Stowage of survival craft.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Stowage of survival craft. 133.130 Section 133.130... SYSTEMS Requirements for All OSVs § 133.130 Stowage of survival craft. (a) General. Each survival craft... will not slip off, and meets the requirements of § 133.105(a)(4)(iii). (3) If lifefloats are arranged...

Malleable Thought: The Role of Craft Thinking in Practice-Led Graphic Design

ERIC Educational Resources Information Center

Ings, Welby

2015-01-01

This article considers the potential of craft processes as creative engagements in graphic design research. It initially discusses the uneasy history of craft within the discipline, then draws upon case studies undertaken by three established designers who, in their postgraduate theses, engaged with craft as a process of thinking. In doing so, the…

46 CFR 111.75-16 - Lighting of survival craft and rescue boats.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Lighting of survival craft and rescue boats. 111.75-16... craft and rescue boats. (a) During preparation, launching, and recovery, each survival craft and rescue boat, its launching appliance, and the area of water into which it is to be launched or recovered must...

46 CFR 111.75-16 - Lighting of survival craft and rescue boats.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 4 2011-10-01 2011-10-01 false Lighting of survival craft and rescue boats. 111.75-16... craft and rescue boats. (a) During preparation, launching, and recovery, each survival craft and rescue boat, its launching appliance, and the area of water into which it is to be launched or recovered must...

46 CFR 111.75-16 - Lighting of survival craft and rescue boats.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Lighting of survival craft and rescue boats. 111.75-16... craft and rescue boats. (a) During preparation, launching, and recovery, each survival craft and rescue boat, its launching appliance, and the area of water into which it is to be launched or recovered must...

46 CFR 111.75-16 - Lighting of survival craft and rescue boats.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Lighting of survival craft and rescue boats. 111.75-16... craft and rescue boats. (a) During preparation, launching, and recovery, each survival craft and rescue boat, its launching appliance, and the area of water into which it is to be launched or recovered must...

33 CFR 84.24 - High-speed craft.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false High-speed craft. 84.24 Section... RULES ANNEX I: POSITIONING AND TECHNICAL DETAILS OF LIGHTS AND SHAPES § 84.24 High-speed craft. (a) The masthead light of high-speed craft with a length to breadth ratio of less than 3.0 may be placed at a...

33 CFR 84.24 - High-speed craft.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false High-speed craft. 84.24 Section... RULES ANNEX I: POSITIONING AND TECHNICAL DETAILS OF LIGHTS AND SHAPES § 84.24 High-speed craft. (a) The masthead light of high-speed craft with a length to breadth ratio of less than 3.0 may be placed at a...

Multi-agent autonomous system and method

NASA Technical Reports Server (NTRS)

Fink, Wolfgang (Inventor); Dohm, James (Inventor); Tarbell, Mark A. (Inventor)

2010-01-01

A method of controlling a plurality of crafts in an operational area includes providing a command system, a first craft in the operational area coupled to the command system, and a second craft in the operational area coupled to the command system. The method further includes determining a first desired destination and a first trajectory to the first desired destination, sending a first command from the command system to the first craft to move a first distance along the first trajectory, and moving the first craft according to the first command. A second desired destination and a second trajectory to the second desired destination are determined and a second command is sent from the command system to the second craft to move a second distance along the second trajectory.

High Job Demands, Still Engaged and Not Burned Out? The Role of Job Crafting.

PubMed

Hakanen, Jari J; Seppälä, Piia; Peeters, Maria C W

2017-08-01

Traditionally, employee well-being has been considered as resulting from decent working conditions arranged by the organization. Much less is known about whether employees themselves can make self-initiated changes to their work, i.e., craft their jobs, in order to stay well, even in highly demanding work situations. The aim of this study was to use the job demands-resources (JD-R model) to investigate whether job crafting buffers the negative impacts of four types of job demands (workload, emotional dissonance, work contents, and physical demands) on burnout and work engagement. A questionnaire study was designed to examine the buffering role of job crafting among 470 Finnish dentists. All in all, 11 out of 16 possible interaction effects of job demands and job crafting on employee well-being were significant. Job crafting particularly buffered the negative effects of job demands on burnout (7/8 significant interactions) and to a somewhat lesser extent also on work engagement (4/8 significant interactions). Applying job crafting techniques appeared to be particularly effective in mitigating the negative effects of quantitative workload (4/4 significant interactions). By demonstrating that job crafting can also buffer the negative impacts of high job demands on employee well-being, this study contributed to the JD-R model as it suggests that job crafting may even be possible under high work demands, and not only in resourceful jobs, as most previous studies have indicated. In addition to the top-down initiatives for improving employee well-being, bottom-up approaches such as job crafting may also be efficient in preventing burnout and enhancing work engagement.

Self-crafting vegetable snacks: testing the IKEA-effect in children.

PubMed

Raghoebar, Sanne; van Kleef, Ellen; de Vet, Emely

2017-01-01

The purpose of this paper is to test whether the IKEA-effect (Norton et al. , 2012) - better liking for self-crafted products than for identical products crafted by others - can be exploited to increase liking and consumption of vegetable snacks in children. A between-subjects experiment was conducted at an after school care facility. In total, 86 children aged four to six either crafted a peacock with vegetables or with non-food objects following an example. After the task, children ate snack vegetables ad libitum, and rated their liking for the vegetables and pride in crafting the peacock. No significant main effect of the vegetable snack creation on consumption and liking was observed. Also, perceived pride did not mediate the effect of self-crafting vegetable snacks on consumption of and liking for vegetables. Vegetable consumption did not differ between children who were either simply exposed to vegetable snacks while crafting or those who were crafting the vegetable snacks themselves. The equal consumption might suggest that this is caused by simple exposure, but more research is needed comparing self-crafting and exposure to a condition where there is no initial exposure to vegetables. Although the IKEA-effect has been demonstrated in adults, this is one of the first studies evaluating the IKEA-effect in children and as a means to increase liking for a generally disliked product in this target group, i.e. vegetables. The IKEA-effect could not be replicated under these more stringent conditions, where the experimental set-up enabled disentangling exposure and crafting effects.

Teaching Quantum Mechanics with qCraft: qCraft in Action

NASA Astrophysics Data System (ADS)

Chatwin-Davies, Aidan; Kubica, Aleksander; Michalakis, Spyridon

In this second talk, we delve further into qCraft, which is an extension, or ``mod,'' of the popular video game Minecraft. We explain how quantum-mechanical phenomena-such as superposition, observer-dependency, and entanglement-are implemented in qCraft. We finish with a short demo and share our experiences with its use in primary school and high school classrooms.

26 CFR 1.861-16 - Income from certain craft first leased after December 28, 1980.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 26 Internal Revenue 9 2010-04-01 2010-04-01 false Income from certain craft first leased after... the United States § 1.861-16 Income from certain craft first leased after December 28, 1980. (a) General rule. If a taxpayer— (1) Owns a qualified craft (as defined in paragraph (b) of this section). (2...

25 CFR 309.10 - What are some sample categories and examples of Indian products?

Code of Federal Regulations, 2011 CFR

2011-04-01

... products? 309.10 Section 309.10 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.10 What are some sample categories and examples of Indian.... Additionally, although the Indian Arts and Crafts Act of 1990 and the Indian Arts and Crafts Enforcement Act of...

46 CFR 133.150 - Survival craft launching and recovery arrangements: General.

Code of Federal Regulations, 2010 CFR

2010-10-01

... craft that can be boarded from a position on deck less than 4.5 meters (14.75 feet) above the waterline...); (2) Those survival craft that can be boarded from a position on deck less than 4.5 meters (14.75 feet... gravity or stored mechanical power, independent of the OSV's power supplies, to launch the survival craft...

46 CFR 133.150 - Survival craft launching and recovery arrangements: General.

Code of Federal Regulations, 2011 CFR

2011-10-01

... craft that can be boarded from a position on deck less than 4.5 meters (14.75 feet) above the waterline...); (2) Those survival craft that can be boarded from a position on deck less than 4.5 meters (14.75 feet... gravity or stored mechanical power, independent of the OSV's power supplies, to launch the survival craft...

33 CFR 150.503 - What are the time interval requirements for maintenance on survival craft falls?

Code of Federal Regulations, 2010 CFR

2010-07-01

... requirements for maintenance on survival craft falls? 150.503 Section 150.503 Navigation and Navigable Waters... maintenance on survival craft falls? (a) Each fall used in a launching device for survival craft or rescue boats must be turned end-for-end at intervals of not more than 30 months. (b) Each fall must be replaced...

33 CFR 150.503 - What are the time interval requirements for maintenance on survival craft falls?

Code of Federal Regulations, 2013 CFR

2013-07-01

... requirements for maintenance on survival craft falls? 150.503 Section 150.503 Navigation and Navigable Waters... maintenance on survival craft falls? (a) Each fall used in a launching device for survival craft or rescue boats must be turned end-for-end at intervals of not more than 30 months. (b) Each fall must be replaced...

33 CFR 150.503 - What are the time interval requirements for maintenance on survival craft falls?

Code of Federal Regulations, 2011 CFR

2011-07-01

... requirements for maintenance on survival craft falls? 150.503 Section 150.503 Navigation and Navigable Waters... maintenance on survival craft falls? (a) Each fall used in a launching device for survival craft or rescue boats must be turned end-for-end at intervals of not more than 30 months. (b) Each fall must be replaced...

33 CFR 150.503 - What are the time interval requirements for maintenance on survival craft falls?

Code of Federal Regulations, 2012 CFR

2012-07-01

... requirements for maintenance on survival craft falls? 150.503 Section 150.503 Navigation and Navigable Waters... maintenance on survival craft falls? (a) Each fall used in a launching device for survival craft or rescue boats must be turned end-for-end at intervals of not more than 30 months. (b) Each fall must be replaced...

33 CFR 150.503 - What are the time interval requirements for maintenance on survival craft falls?

Code of Federal Regulations, 2014 CFR

2014-07-01

... requirements for maintenance on survival craft falls? 150.503 Section 150.503 Navigation and Navigable Waters... maintenance on survival craft falls? (a) Each fall used in a launching device for survival craft or rescue boats must be turned end-for-end at intervals of not more than 30 months. (b) Each fall must be replaced...

25 CFR 309.10 - What are some sample categories and examples of Indian products?

Code of Federal Regulations, 2010 CFR

2010-04-01

... products? 309.10 Section 309.10 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.10 What are some sample categories and examples of Indian.... Additionally, although the Indian Arts and Crafts Act of 1990 and the Indian Arts and Crafts Enforcement Act of...

32 CFR 700.406 - Naval Vessel Register, classification of naval craft, and status of ships and service craft.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 32 National Defense 5 2011-07-01 2011-07-01 false Naval Vessel Register, classification of naval... STATES NAVY REGULATIONS AND OFFICIAL RECORDS The Chief of Naval Operations § 700.406 Naval Vessel Register, classification of naval craft, and status of ships and service craft. (a) The Chief of Naval...

32 CFR 700.406 - Naval Vessel Register, classification of naval craft, and status of ships and service craft.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 32 National Defense 5 2010-07-01 2010-07-01 false Naval Vessel Register, classification of naval... STATES NAVY REGULATIONS AND OFFICIAL RECORDS The Chief of Naval Operations § 700.406 Naval Vessel Register, classification of naval craft, and status of ships and service craft. (a) The Chief of Naval...

Taking control: Is job crafting related to the intention to leave surgical training?

PubMed Central

Stassen, Laurents; de Grave, Willem; Sanabria, Alvaro; Alfonso, Edgar; Dolmans, Diana

2018-01-01

Objective The intention to leave surgical training, hereinafter referred as proxy of “attrition,” is associated with poor well-being in the workplace. Attrition is suggested to diminish when residents possess job-crafting skills, that is, the ability to redefine their job in meaningful ways and maximize well-being at work by increasing structural and social resources and challenges and decreasing hindering demands. However, the evidence supporting this relationship is scant. This study sought to: 1) investigate to what extent residents possess job-crafting skills and compare residents’ levels of job-crafting skills across years of residency training; 2) investigate the relationship between job crafting, well-being as measured by burnout and work-engagement rates, and the intention to leave; and 3) compare the levels of job-crafting skills and well-being between residents with and without serious intentions to leave. Methods This cross sectional study was conducted in fifteen residency programs in Colombia. Surgical residents completed different questionnaires including the Dutch Job Crafting Scale (DJCS), MBI-Human Services Survey (MBI-HSS), Utrecht Work Engagement Scale (UWES-17) and an adapted version of the Nurse Turnover Intention Scale (NTIS). The objectives were addressed by independent analyses of variance (ANOVA), structural equation modeling techniques (SEM) and independent t-tests, respectively. Results A total of 202 residents participated. Residents generally scored high on their job-crafting skills to increase structural and social resources as well as challenging demands, but were less positive about their skills to reduce hindering demands. No differences across years of training were found. Job crafting correlated positively with work-engagement, which was inversely related to the intention to leave. Conversely, job crafting correlated negatively with burnout, which bore a positive relationship to the intention to leave. Residents with serious intentions to leave exhibited lower levels of most job-crafting skills and work-engagement, compared to those without such intentions. Conclusions This study adds evidence that attrition is a process mediated by residents’ well being at work, which can be molded by their job-crafting endeavors. Future research is needed to evaluate the effectiveness of interventions aimed at cultivating resident’s job-crafting abilities in order to reduce attrition. PMID:29856750

25 CFR 309.24 - How will statements about Indian origin of art or craft products be interpreted?

Code of Federal Regulations, 2011 CFR

2011-04-01

... 25 Indians 2 2011-04-01 2011-04-01 false How will statements about Indian origin of art or craft products be interpreted? 309.24 Section 309.24 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.24 How will statements about Indian origin of...

Standardized Laboratory Test Requirements for Hardening Equipment to Withstand Wave Impact Shock in Small High Speed Craft

DTIC Science & Technology

2017-02-06

and methodology for transitioning craft acceleration data to laboratory shock test requirements are summarized and example requirements for...engineering rationale, assumptions, and methodology for transitioning craft acceleration data to laboratory shock test requirements are summarized and... Methodologies for Small High-Speed Craft Structure, Equipment, Shock Isolation Seats, and Human Performance At-Sea, 10 th Symposium on High

25 CFR 309.24 - How will statements about Indian origin of art or craft products be interpreted?

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 2 2010-04-01 2010-04-01 false How will statements about Indian origin of art or craft products be interpreted? 309.24 Section 309.24 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.24 How will statements about Indian origin of...

33 CFR 149.304 - What type and how many survival craft and rescue boats must a manned deepwater port have?

Code of Federal Regulations, 2012 CFR

2012-07-01

... craft and rescue boats must a manned deepwater port have? 149.304 Section 149.304 Navigation and... What type and how many survival craft and rescue boats must a manned deepwater port have? (a) Except as... of survival craft and the number of rescue boats indicated for the deepwater port in paragraphs (a)(1...

33 CFR 149.304 - What type and how many survival craft and rescue boats must a manned deepwater port have?

Code of Federal Regulations, 2013 CFR

2013-07-01

... craft and rescue boats must a manned deepwater port have? 149.304 Section 149.304 Navigation and... What type and how many survival craft and rescue boats must a manned deepwater port have? (a) Except as... survival craft and the number of rescue boats indicated for the deepwater port in paragraphs (a)(1) through...

33 CFR 149.304 - What type and how many survival craft and rescue boats must a manned deepwater port have?

Code of Federal Regulations, 2014 CFR

2014-07-01

... craft and rescue boats must a manned deepwater port have? 149.304 Section 149.304 Navigation and... What type and how many survival craft and rescue boats must a manned deepwater port have? (a) Except as... survival craft and the number of rescue boats indicated for the deepwater port in paragraphs (a)(1) through...

33 CFR 149.304 - What type and how many survival craft and rescue boats must a manned deepwater port have?

Code of Federal Regulations, 2011 CFR

2011-07-01

... craft and rescue boats must a manned deepwater port have? 149.304 Section 149.304 Navigation and... What type and how many survival craft and rescue boats must a manned deepwater port have? (a) Except as... of survival craft and the number of rescue boats indicated for the deepwater port in paragraphs (a)(1...

When craft and science collide: Improving therapeutic practices through evidence-based innovations.

PubMed

Justice, Laura M

2010-04-01

Evidence-based practice (EBP) is a model of clinical decision-making that is increasingly being advocated for use in the field of speech-language pathology. With the increased emphasis on scientific evidence as a form of knowledge important to EBP, clinicians may wonder whether their craft-based knowledge (i.e., knowledge derived from theory and practice), remains a legitimate form of knowledge for use in clinician decisions. This article describes forms of knowledge that may be used to address clinical questions, to include both craft and science. Additionally, the steps used when engaging in EBP are described so that clinicians understand when and how craft comes into play. The major premise addressed within this article is that craft is a legitimate form of knowledge and that engagement in EBP requires one to employ craft-based knowledge.

Developing Community Reinforcement and Family Training (CRAFT) for Parents of Treatment-Resistant Adolescents.

PubMed

Kirby, Kimberly C; Versek, Brian; Kerwin, MaryLouise E; Meyers, Kathleen; Benishek, Lois A; Bresani, Elena; Washio, Yukiko; Arria, Amelia; Meyers, Robert J

2015-05-04

We describe a project focused on training parents to facilitate their treatment-resistant adolescent's treatment entry and to manage their child after entry into community-based treatment. Controlled studies show that Community Reinforcement and Family Training (CRAFT) is a unilateral treatment that fosters treatment entry of adults; however, there are no controlled trials for parents with a substance-abusing child. We examined the behavioral parent training literature to guide us in tailoring CRAFT for parents of adolescents. We discuss adaptations to CRAFT, outcomes and experiences gained from a brief pilot of the revised CRAFT program, and the future directions of this work.

Dataset on Investigating the role of onsite learning in the optimisation of craft gang's productivity in the construction industry.

PubMed

Ugulu, Rex Asibuodu; Allen, Stephen

2017-12-01

The data presented in this article is an original data on "Investigating the role of onsite learning in the optimisation of craft gang's productivity in the construction industry". This article describes the constraints influencing craft gang's productivity and the influence of onsite learning on the blockwork craft gang's productivity. It also presented the method of data collection, using a semi-structured interview and an observation method to collect data from construction organisations. We provided statistics on the top most important constraints affecting the craft gang's productivity using 3-D Bar charts. In addition, we computed the correlation coefficients and the regression model on the influence of onsite learning on craft gang's productivity using the man-hour as the dependent variable. The relationship between blockwork inputs and cycle numbers was determined at 5% significance level. Finally, we presented data information on the application of the learning curve theory using the unit straight-line model equations and computed the learning rate of the observed craft gang's blockwork repetitive work.

Mothers' negative evaluations of their children's performances enhance boys' memories for crafts.

PubMed

Dunsmore, Julie C; Halberstadt, Amy G; Robinson, Megan L

2004-12-01

The authors predicted that mothers' evaluative comments would affect their preschool-aged children's learning during a craft-making activity. Each mother (N = 67) taught her child 6 crafts in a playroom in a university setting. Three weeks later, the child returned to the playroom to redo the crafts. Evaluators tested the children's memories of the procedures for completing the crafts. The authors used videotapes of the mothers' teaching to code for statements that positively evaluated their children's performances (praise) or that negatively evaluated their children's performances (criticism). Maternal praise did not affect children's memories. Maternal criticism did not affect their daughters' memories. However, sons were more likely to more accurately redo craft steps for which their mothers had made at least 1 comment criticizing their performances. The authors proposed that emotional arousal was a reason for girls' and boys' differential responses to maternal criticism.

Computational Workbench for Multibody Dynamics

NASA Technical Reports Server (NTRS)

Edmonds, Karina

2007-01-01

PyCraft is a computer program that provides an interactive, workbenchlike computing environment for developing and testing algorithms for multibody dynamics. Examples of multibody dynamic systems amenable to analysis with the help of PyCraft include land vehicles, spacecraft, robots, and molecular models. PyCraft is based on the Spatial-Operator- Algebra (SOA) formulation for multibody dynamics. The SOA operators enable construction of simple and compact representations of complex multibody dynamical equations. Within the Py-Craft computational workbench, users can, essentially, use the high-level SOA operator notation to represent the variety of dynamical quantities and algorithms and to perform computations interactively. PyCraft provides a Python-language interface to underlying C++ code. Working with SOA concepts, a user can create and manipulate Python-level operator classes in order to implement and evaluate new dynamical quantities and algorithms. During use of PyCraft, virtually all SOA-based algorithms are available for computational experiments.

46 CFR 108.540 - Survival craft muster and embarkation arrangements.

Code of Federal Regulations, 2014 CFR

2014-10-01

... OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.540 Survival craft muster and... over the edge of the deck; and (2) Safely disembarked after a drill in the case of a survival craft not...

46 CFR 108.540 - Survival craft muster and embarkation arrangements.

Code of Federal Regulations, 2011 CFR

2011-10-01

... OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.540 Survival craft muster and... over the edge of the deck; and (2) Safely disembarked after a drill in the case of a survival craft not...

46 CFR 108.540 - Survival craft muster and embarkation arrangements.

Code of Federal Regulations, 2012 CFR

2012-10-01

... OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.540 Survival craft muster and... over the edge of the deck; and (2) Safely disembarked after a drill in the case of a survival craft not...

1. View of west front and south side of Craft ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

1. View of west front and south side of Craft Farm, House, facing northeast. North Brown Road in foreground and mature hardwood tree on left. - Craft Farm, House, 1912 North Brown Road, Lawrenceville, Gwinnett County, GA

Probabilistic Deviation Detection and Optimal Thresholds

DTIC Science & Technology

2014-01-01

27 List of Figures Figure 1: A screenshot of the StarCraft Brood War videogame ...War videogame StarCraft is used as the domain for the case-based planning research conducted in the DEEP project. StarCraft was selected for a number

Analyzing components of Community Reinforcement and Family Training (CRAFT): Is treatment entry training sufficient?

PubMed

Kirby, Kimberly C; Benishek, Lois A; Kerwin, MaryLouise E; Dugosh, Karen L; Carpenedo, Carolyn M; Bresani, Elena; Haugh, James A; Washio, Yukiko; Meyers, Robert J

2017-11-01

Community Reinforcement and Family Training (CRAFT) assists family members with a treatment-resistant loved one. The most consistent outcome of CRAFT is increased treatment entry of the identified treatment-resistant person (IP). This led us to question whether all 6 components of CRAFT are necessary. In a randomized clinical trial, 115 concerned significant others (CSOs) of an IP received 12-14 sessions of the full CRAFT intervention, 4-6 sessions focused on Treatment Entry Training (TEnT), or 12-14 sessions of Al-Anon/Nar-Anon Facilitation (ANF). We monitored treatment entry, attendance, and substance use of the IP and the CSO's mood and functioning. Data were collected at baseline and 4, 6, and 9 months after the baseline. We found significant reductions in time to treatment entry (χ(2)2 = 8.89, p = .01) and greater treatment entry rates for CRAFT (62%; odds ratio [OR] = 2.7, 95% confidence interval [CI] = 1.1-6.9) and TEnT (63%; OR = 2.9, 95% CI = 1.2-7.5) compared with ANF (37%), but CRAFT and TEnT did not differ significantly from each other (OR = 1.1, 95% CI = 0.4-2.7). No between-group differences in IP drug use were reported by CSOs, but days of drug use decreased over time for all groups (F(3, 277) = 13.47, p < .0001). Similarly, CSO mood and functioning did not differ between the 3 conditions but improved over time (p < .0001 for all significant measures). We replicated the results of previous trials demonstrating that CRAFT produces greater treatment entry rates than ANF and found similar treatment entry rates for CRAFT and TEnT. This suggests that treatment entry training is sufficient for producing the best established outcome of CRAFT. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

Job crafting among health care professionals: The role of work engagement.

PubMed

Bakker, Arnold B

2018-04-01

The aim of this study was to examine the impact of job crafting on the quality of the work environment of health care professionals. Job crafting refers to proactive behavior aimed at optimizing the fit between person and job. Using job demands-resources theory, we hypothesized that job crafting would be positively related to job resources and person-organisation fit, and negatively to hindrance demands. Furthermore, we hypothesized that these relationships would be qualified by work engagement. A total of 5,272 health care professionals from one of 35 different organisations filled out an electronic questionnaire (response is 55%). Regression analyses were used to test hypotheses. Consistent with hypotheses, job crafting in the form of increasing job resources was positively related to opportunities for development, performance feedback and P-O fit; and negatively related to hindrance job demands - particularly when work engagement was high. The combination of job crafting and work engagement is important for the realization of a resourceful work environment and fit between person and organisation. Interventions aimed at fostering job crafting should be tailored to the motivation of health care professionals. © 2017 John Wiley & Sons Ltd.

Arts and Crafts Centers

DTIC Science & Technology

1976-08-01

This guide contains design criteria for Army Arts and Crafts Centers which are in some Instances referred to as Skill Development Centers. The term...useful in planning improvements or in better utilizing existing Arts and Crafts Centers or other suitable facilities. d. This guide is directed

Manned and Unmanned Aircraft Effectiveness in Fast Attack Craft / Fast Inshore Attack Craft ASUW Kill Chain Execution

DTIC Science & Technology

2016-09-01

par. 4) Based on a RED projected size of 22.16 m, a sample calculation for the unadjusted single shot probability of kill for HELLFIRE missiles is...framework based on intelligent objects (SIMIO) environment to model a fast attack craft/fast inshore attack craft anti-surface warfare expanded kill chain...concept of operation efficiency. Based on the operational environment, low cost and less capable unmanned aircraft provide an alternative to the

Evolutionary Perspectives on Genetic and Environmental Risk Factors for Psychiatric Disorders.

PubMed

Keller, Matthew C

2018-05-07

Evolutionary medicine uses evolutionary theory to help elucidate why humans are vulnerable to disease and disorders. I discuss two different types of evolutionary explanations that have been used to help understand human psychiatric disorders. First, a consistent finding is that psychiatric disorders are moderately to highly heritable, and many, such as schizophrenia, are also highly disabling and appear to decrease Darwinian fitness. Models used in evolutionary genetics to understand why genetic variation exists in fitness-related traits can be used to understand why risk alleles for psychiatric disorders persist in the population. The usual explanation for species-typical adaptations-natural selection-is less useful for understanding individual differences in genetic risk to disorders. Rather, two other types of models, mutation-selection-drift and balancing selection, offer frameworks for understanding why genetic variation in risk to psychiatric (and other) disorders exists, and each makes predictions that are now testable using whole-genome data. Second, species-typical capacities to mount reactions to negative events are likely to have been crafted by natural selection to minimize fitness loss. The pain reaction to tissue damage is almost certainly such an example, but it has been argued that the capacity to experience depressive symptoms such as sadness, anhedonia, crying, and fatigue in the face of adverse life situations may have been crafted by natural selection as well. I review the rationale and strength of evidence for this hypothesis. Evolutionary hypotheses of psychiatric disorders are important not only for offering explanations for why psychiatric disorders exist, but also for generating new, testable hypotheses and understanding how best to design studies and analyze data.

Output Devices, Computation, and the Future of Mathematical Crafts.

ERIC Educational Resources Information Center

Eisenberg, Michael

2002-01-01

The advent of powerful, affordable output devices offers the potential for a vastly expanded landscape of computationally-enriched mathematical craft activities in education. Craft activities have both intellectual and emotional affordances that are relatively lacking in "traditional" computer-based education. Describes three software applications…

Empowering leadership and job crafting: The role of employee optimism.

PubMed

Thun, Sylvi; Bakker, Arnold B

2018-06-08

The objective of this study was to test the relationship between empowering leadership and job crafting and to examine the moderating role of optimism as a personal resource. We hypothesized that the association between empowering leadership and job crafting would be stronger for employees with high (vs. low) levels of optimism. A total of 331 Norwegian workers from a variety of occupations participated in our study. Results of structural equation modelling analysis generally supported our hypotheses. Empowering leadership was positively related to 3 of the 4 job crafting strategies investigated (increasing structural job resources, increasing social job resources, and increasing challenging job demands; but not reducing hindrance job demands). Moreover, as hypothesized, optimism strengthened the empowering leadership-job crafting relationship for increasing structural resources and increasing challenging demands. The results suggest that empowering leadership is an important antecedent of job crafting strategies, except for reducing hindrance demands. The implications of these findings are discussed. Copyright © 2018 John Wiley & Sons, Ltd.

Multi-agent autonomous system

NASA Technical Reports Server (NTRS)

Fink, Wolfgang (Inventor); Dohm, James (Inventor); Tarbell, Mark A. (Inventor)

2010-01-01

A multi-agent autonomous system for exploration of hazardous or inaccessible locations. The multi-agent autonomous system includes simple surface-based agents or craft controlled by an airborne tracking and command system. The airborne tracking and command system includes an instrument suite used to image an operational area and any craft deployed within the operational area. The image data is used to identify the craft, targets for exploration, and obstacles in the operational area. The tracking and command system determines paths for the surface-based craft using the identified targets and obstacles and commands the craft using simple movement commands to move through the operational area to the targets while avoiding the obstacles. Each craft includes its own instrument suite to collect information about the operational area that is transmitted back to the tracking and command system. The tracking and command system may be further coupled to a satellite system to provide additional image information about the operational area and provide operational and location commands to the tracking and command system.

Magnon Dirac materials

NASA Astrophysics Data System (ADS)

Fransson, J.; Black-Schaffer, A. M.; Balatsky, A. V.

2016-08-01

We demonstrate how a Dirac-like magnon spectrum is generated for localized magnetic moments forming a two-dimensional honeycomb lattice. The Dirac crossing point is proven to be robust against magnon-magnon interactions, as these only shift the spectrum. Local defects induce impurity resonances near the Dirac point, as well as magnon Friedel oscillations. The energy of the Dirac point is controlled by the exchange coupling, and thus a two-dimensional array of magnetic dots is an experimentally feasible realization of Dirac magnons with tunable dispersion.

46 CFR 108.550 - Survival craft launching and recovery arrangements: General.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Survival craft launching and recovery arrangements: General. 108.550 Section 108.550 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.550 Survival craft...

46 CFR 108.525 - Survival craft number and arrangement.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Survival craft number and arrangement. 108.525 Section 108.525 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.525 Survival craft number and arrangement. (a...

46 CFR 108.530 - Stowage of survival craft.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 4 2011-10-01 2011-10-01 false Stowage of survival craft. 108.530 Section 108.530 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.530 Stowage of survival craft. (a) General. Each survival...

46 CFR 108.575 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Survival craft and rescue boat equipment. 108.575 Section 108.575 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.575 Survival craft and rescue boat equipment...

46 CFR 108.550 - Survival craft launching and recovery arrangements: General.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Survival craft launching and recovery arrangements: General. 108.550 Section 108.550 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.550 Survival craft...

46 CFR 108.575 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Survival craft and rescue boat equipment. 108.575 Section 108.575 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.575 Survival craft and rescue boat equipment...

46 CFR 108.525 - Survival craft number and arrangement.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 4 2011-10-01 2011-10-01 false Survival craft number and arrangement. 108.525 Section 108.525 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.525 Survival craft number and arrangement. (a...

46 CFR 108.575 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 4 2011-10-01 2011-10-01 false Survival craft and rescue boat equipment. 108.575 Section 108.575 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.575 Survival craft and rescue boat equipment...

46 CFR 108.530 - Stowage of survival craft.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Stowage of survival craft. 108.530 Section 108.530 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.530 Stowage of survival craft. (a) General. Each survival...

46 CFR 108.530 - Stowage of survival craft.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Stowage of survival craft. 108.530 Section 108.530 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.530 Stowage of survival craft. (a) General. Each survival...

46 CFR 108.525 - Survival craft number and arrangement.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Survival craft number and arrangement. 108.525 Section 108.525 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.525 Survival craft number and arrangement. (a...

46 CFR 28.130 - Survival craft equipment.

Code of Federal Regulations, 2014 CFR

2014-10-01

... survival craft equipment must be of good quality, effective for the purpose it is intended to serve, and... “Limited Service”); or (3) SOLAS A Pack (formerly “Ocean Service”). (c) Each life float and buoyant... survival craft other than inflatable liferafts, life floats, inflatable buoyant apparatus, or buoyant...

46 CFR 28.130 - Survival craft equipment.

Code of Federal Regulations, 2012 CFR

2012-10-01

... survival craft equipment must be of good quality, effective for the purpose it is intended to serve, and... “Limited Service”); or (3) SOLAS A Pack (formerly “Ocean Service”). (c) Each life float and buoyant... survival craft other than inflatable liferafts, life floats, inflatable buoyant apparatus, or buoyant...

46 CFR 180.175 - Survival craft equipment.

Code of Federal Regulations, 2013 CFR

2013-10-01

... Survival craft equipment. (a) General. Each item of survival craft equipment must be of good quality, and... on its container: (1) Safety of Life at Sea (SOLAS) B Pack; or (2) SOLAS A Pack. (c) Inflatable...'s approved servicing manual. (d) Life floats. Each life float must be fitted with a lifeline...

46 CFR 180.175 - Survival craft equipment.

Code of Federal Regulations, 2011 CFR

2011-10-01

... Survival craft equipment. (a) General. Each item of survival craft equipment must be of good quality, and... on its container: (1) Safety of Life at Sea (SOLAS) B Pack; or (2) SOLAS A Pack. (c) Inflatable...'s approved servicing manual. (d) Life floats. Each life float must be fitted with a lifeline...

46 CFR 180.175 - Survival craft equipment.

Code of Federal Regulations, 2010 CFR

2010-10-01

... Survival craft equipment. (a) General. Each item of survival craft equipment must be of good quality, and... on its container: (1) Safety of Life at Sea (SOLAS) B Pack; or (2) SOLAS A Pack. (c) Inflatable...'s approved servicing manual. (d) Life floats. Each life float must be fitted with a lifeline...

46 CFR 28.130 - Survival craft equipment.

Code of Federal Regulations, 2010 CFR

2010-10-01

... survival craft equipment must be of good quality, effective for the purpose it is intended to serve, and... “Limited Service”); or (3) SOLAS A Pack (formerly “Ocean Service”). (c) Each life float and buoyant... survival craft other than inflatable liferafts, life floats, inflatable buoyant apparatus, or buoyant...

46 CFR 180.175 - Survival craft equipment.

Code of Federal Regulations, 2012 CFR

2012-10-01

... Survival craft equipment. (a) General. Each item of survival craft equipment must be of good quality, and... on its container: (1) Safety of Life at Sea (SOLAS) B Pack; or (2) SOLAS A Pack. (c) Inflatable...'s approved servicing manual. (d) Life floats. Each life float must be fitted with a lifeline...

46 CFR 180.175 - Survival craft equipment.

Code of Federal Regulations, 2014 CFR

2014-10-01

... Survival craft equipment. (a) General. Each item of survival craft equipment must be of good quality, and... on its container: (1) Safety of Life at Sea (SOLAS) B Pack; or (2) SOLAS A Pack. (c) Inflatable...'s approved servicing manual. (d) Life floats. Each life float must be fitted with a lifeline...

46 CFR 28.130 - Survival craft equipment.

Code of Federal Regulations, 2013 CFR

2013-10-01

... survival craft equipment must be of good quality, effective for the purpose it is intended to serve, and... “Limited Service”); or (3) SOLAS A Pack (formerly “Ocean Service”). (c) Each life float and buoyant... survival craft other than inflatable liferafts, life floats, inflatable buoyant apparatus, or buoyant...

46 CFR 28.130 - Survival craft equipment.

Code of Federal Regulations, 2011 CFR

2011-10-01

... survival craft equipment must be of good quality, effective for the purpose it is intended to serve, and... “Limited Service”); or (3) SOLAS A Pack (formerly “Ocean Service”). (c) Each life float and buoyant... survival craft other than inflatable liferafts, life floats, inflatable buoyant apparatus, or buoyant...

Digitizing Craft: Creative Writing Studies and New Media--A Proposal

ERIC Educational Resources Information Center

Koehler, Adam

2013-01-01

This article identifies and examines a digital arm of creative writing studies and organizes that proposal into four categories through which to theorize the "craft" of creative production, each borrowed from Tim Mayers's "(Re)Writing Craft: Composition, Creative Writing, and the Future of English Studies": process, genre, author, and…

46 CFR 180.204 - Survival craft-vessels operating on coastwise routes.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Survival craft-vessels operating on coastwise routes. 180.204 Section 180.204 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL... Craft § 180.204 Survival craft—vessels operating on coastwise routes. (a) Except as allowed by paragraph...

25 CFR 141.27 - Trade in imitation Indian crafts prohibited.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 1 2010-04-01 2010-04-01 false Trade in imitation Indian crafts prohibited. 141.27 Section 141.27 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR FINANCIAL ACTIVITIES BUSINESS... Indian crafts prohibited. No person may introduce or possess for disposition or sale within the exterior...

25 CFR 309.26 - What penalties apply?

Code of Federal Regulations, 2011 CFR

2011-04-01

... 25 Indians 2 2011-04-01 2011-04-01 false What penalties apply? 309.26 Section 309.26 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS..., or the product of a particular Indian or Indian tribe or Indian arts and crafts organization...

46 CFR 133.110 - Survival craft muster and embarkation arrangements.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Survival craft muster and embarkation arrangements. 133.110 Section 133.110 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS LIFESAVING SYSTEMS Requirements for All OSVs § 133.110 Survival craft muster and embarkation...

46 CFR 133.110 - Survival craft muster and embarkation arrangements.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Survival craft muster and embarkation arrangements. 133.110 Section 133.110 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS LIFESAVING SYSTEMS Requirements for All OSVs § 133.110 Survival craft muster and embarkation...

46 CFR 109.323 - Manning of survival craft and supervision.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Manning of survival craft and supervision. 109.323 Section 109.323 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS OPERATIONS Operation and Stowage of Safety Equipment § 109.323 Manning of survival craft and...

46 CFR 109.323 - Manning of survival craft and supervision.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Manning of survival craft and supervision. 109.323 Section 109.323 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS OPERATIONS Operation and Stowage of Safety Equipment § 109.323 Manning of survival craft and...

46 CFR 199.100 - Manning of survival craft and supervision.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 7 2011-10-01 2011-10-01 false Manning of survival craft and supervision. 199.100 Section 199.100 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LIFESAVING APPLIANCES....100 Manning of survival craft and supervision. (a) There must be a sufficient number of trained...

46 CFR 199.100 - Manning of survival craft and supervision.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 46 Shipping 7 2013-10-01 2013-10-01 false Manning of survival craft and supervision. 199.100 Section 199.100 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LIFESAVING APPLIANCES....100 Manning of survival craft and supervision. (a) There must be a sufficient number of trained...

46 CFR 109.323 - Manning of survival craft and supervision.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 46 Shipping 4 2013-10-01 2013-10-01 false Manning of survival craft and supervision. 109.323 Section 109.323 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS OPERATIONS Operation and Stowage of Safety Equipment § 109.323 Manning of survival craft and...

46 CFR 199.100 - Manning of survival craft and supervision.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 7 2012-10-01 2012-10-01 false Manning of survival craft and supervision. 199.100 Section 199.100 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LIFESAVING APPLIANCES....100 Manning of survival craft and supervision. (a) There must be a sufficient number of trained...

46 CFR 109.323 - Manning of survival craft and supervision.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 4 2011-10-01 2011-10-01 false Manning of survival craft and supervision. 109.323 Section 109.323 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS OPERATIONS Operation and Stowage of Safety Equipment § 109.323 Manning of survival craft and...

46 CFR 199.100 - Manning of survival craft and supervision.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 7 2014-10-01 2014-10-01 false Manning of survival craft and supervision. 199.100 Section 199.100 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LIFESAVING APPLIANCES....100 Manning of survival craft and supervision. (a) There must be a sufficient number of trained...

25 CFR 309.26 - What penalties apply?

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 2 2010-04-01 2010-04-01 false What penalties apply? 309.26 Section 309.26 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS..., or the product of a particular Indian or Indian tribe or Indian arts and crafts organization...

THE CRAFT PROJECT--INSTRUCTIONAL TIME IN READING RESEARCH.

ERIC Educational Resources Information Center

HARRIS, ALBERT J.; SERWER, BLANCHE L.

THE FIRST YEAR OF A 3-YEAR PROJECT ENTITLED "COMPARING READING APPROACHES IN FIRST GRADE TEACHING WITH DISADVANTAGED CHILDREN" (CRAFT) IS REPORTED. CRAFT COMPARES A SKILLS-CENTERED APPROACH WITH A LANGUAGE-EXPERIENCE APPROACH TO TEACHING READING. VARIATIONS OF THE SKILLS-CENTERED APPROACH ARE THE BASAL READER METHOD AND THE PHONOVISUAL…

77 FR 55139 - Safety Zone; Chicago Red Bull Flugtag, Lake Michigan, Chicago, IL

Federal Register 2010, 2011, 2012, 2013, 2014

2012-09-07

... associated with an acrobatic event involving human-powered craft, which are discussed further below. Under 5..., which will involve personally-crafted flying machines with human occupants falling from a raised... include drifting debris, collisions between spectators, falling water craft and their human occupants, and...

Craft Training in Russia: Theory and Practice of Development

ERIC Educational Resources Information Center

Romantsev, Gennadij M.; Efanov, Andrei V.; Moiseev, Andrei V.; Bychkova, Ekaterina Yu.; Karpova, Natalia P.; Tidemann, Bruno

2016-01-01

The relevance of the research topic is substantiated by the social commitment to the establishment of a system of craft training focused on training personnel for craft enterprises. The purpose of the article is to provide theoretical and methodological substantiation of the necessity to provide organizational and pedagogical foundations for the…

33 CFR 146.120 - Manning of survival craft.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Manning of survival craft. 146.120 Section 146.120 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES OPERATIONS Manned OCS Facilities § 146.120 Manning of survival craft. The owner, the owner's agent, or the...

46 CFR 199.100 - Manning of survival craft and supervision.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Manning of survival craft and supervision. 199.100 Section 199.100 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) LIFESAVING APPLIANCES AND ARRANGEMENTS LIFESAVING SYSTEMS FOR CERTAIN INSPECTED VESSELS Requirements for All Vessels § 199.100 Manning of survival craft and supervision. (a...

46 CFR 108.520 - Type of survival craft.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Type of survival craft. 108.520 Section 108.520 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.520 Type of survival craft. (a) Each lifeboat must be a fire-protected...

46 CFR 108.520 - Type of survival craft.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Type of survival craft. 108.520 Section 108.520 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.520 Type of survival craft. (a) Each lifeboat must be a fire-protected...

46 CFR 108.520 - Type of survival craft.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 4 2011-10-01 2011-10-01 false Type of survival craft. 108.520 Section 108.520 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.520 Type of survival craft. (a) Each lifeboat must be a fire-protected...

The comparative risk assessment framework and tools (CRAFT)

Treesearch

Southern Research Station USDA Forest Service

2010-01-01

To help address these challenges, the USDA Forest Service’s Eastern Forest Environmental Threat Assessment Center (EFETAC) and the University of North Carolina Asheville’s National Environmental Modeling and Analysis Center (NEMAC) designed a planning framework, called the Comparative Risk Assessment Framework and Tools (CRAFT). CRAFT is...

Computer Technology-Integrated Projects Should Not Supplant Craft Projects in Science Education

ERIC Educational Resources Information Center

Klopp, Tabatha J.; Rule, Audrey C.; Schneider, Jean Suchsland; Boody, Robert M.

2014-01-01

The current emphasis on computer technology integration and narrowing of the curriculum has displaced arts and crafts. However, the hands-on, concrete nature of craft work in science modeling enables students to understand difficult concepts and to be engaged and motivated while learning spatial, logical, and sequential thinking skills. Analogy…

76 FR 38153 - California State Nonroad Engine Pollution Control Standards; Commercial Harbor Craft Regulations...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-29

... propulsion and auxiliary engines on new and in-use commercial harbor crafts, with some exceptions.\\6...- 0002. For new harbor crafts, each propulsion and auxiliary diesel engine on the vessel is required to... federal Tier 4 certified propulsion engine. \\8\\ BACT is the diesel emission control strategy (DECS...

Reclaiming the Art of Teaching

ERIC Educational Resources Information Center

Lupton, Mandy

2013-01-01

This paper explores the art and craft of teaching in higher education. It presents a model of the relationship between art and craft drawn from the author's theoretical and empirical work, and provides examples from the higher education context to illustrate the model. It discusses the characteristics of teaching as art and craft and…

46 CFR 108.520 - Type of survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Type of survival craft. 108.520 Section 108.520 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.520 Type of survival craft. (a) Each lifeboat must be a fire-protected...

46 CFR 180.208 - Survival craft-vessels operating on rivers routes.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 7 2010-10-01 2010-10-01 false Survival craft-vessels operating on rivers routes. 180... VESSELS (UNDER 100 GROSS TONS) LIFESAVING EQUIPMENT AND ARRANGEMENTS Number and Type of Survival Craft § 180.208 Survival craft—vessels operating on rivers routes. (a) Except as allowed by paragraphs (c), (d...

25 CFR 309.27 - How are complaints filed?

Code of Federal Regulations, 2011 CFR

2011-04-01

... 25 Indians 2 2011-04-01 2011-04-01 false How are complaints filed? 309.27 Section 309.27 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS... writing and addressed to the Director, Indian Arts and Crafts Board, Room 4004-MIB, U.S. Department of the...

33 CFR 100.916 - Chris Craft Silver Cup Races, Algonac, MI.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Chris Craft Silver Cup Races, Algonac, MI. 100.916 Section 100.916 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.916 Chris Craft Silver Cup...

33 CFR 100.916 - Chris Craft Silver Cup Races, Algonac, MI.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Chris Craft Silver Cup Races, Algonac, MI. 100.916 Section 100.916 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY REGATTAS AND MARINE PARADES SAFETY OF LIFE ON NAVIGABLE WATERS § 100.916 Chris Craft Silver Cup...

25 CFR 308.3 - Conditions of eligibility to attach certificates.

Code of Federal Regulations, 2010 CFR

2010-04-01

... Section 308.3 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR REGULATIONS FOR USE OF CERTIFICATES OF THE INDIAN ARTS AND CRAFTS BOARD TO BE ATTACHED TO THEIR TRADE-MARKS BY INDIAN ENTERPRISES... such products as meet the standards of quality prescribed by the Indian Arts and Crafts Board at the...

A Community of Practice: Crafts Persons' Learning in Old Bedford Village

ERIC Educational Resources Information Center

Fickes, Patricia D.

2012-01-01

Community of practice provided the theoretical frame to study the Old Bedford Village crafts persons as they reproduced lifestyles of a Southern Alleghenies rural village from 200 to 300 years ago in early America. This study sought the "how" and "why" Old Bedford Village crafts persons engaged in learning processes as…

32 CFR 700.872 - Ships and craft in drydock.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 32 National Defense 5 2011-07-01 2011-07-01 false Ships and craft in drydock. 700.872 Section 700... Special Circumstances/ships in Naval Stations and Shipyards § 700.872 Ships and craft in drydock. (a) The commanding officer of a ship in drydock shall be responsible for effecting adequate closure, during such...

Fait A La Main: A Source Book of Louisiana Crafts.

ERIC Educational Resources Information Center

Bergeron, Maida, Ed.

The Louisiana Crafts Program is an economic development program that strives to stimulate several markets for Louisiana craftsmen. This publication is a directory of juried Louisiana craftsmen of various types; it is intended as a source book for anyone interested in handmade crafts. It is divided into two sections: "Folk Craftsmen" and…

46 CFR 108.553 - Survival craft launching and recovery arrangements using falls and a winch.

Code of Federal Regulations, 2013 CFR

2013-10-01

... falls and a winch. 108.553 Section 108.553 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY... craft launching and recovery arrangements using falls and a winch. Survival craft launching and recovery...) Each fall wire must be of rotation-resistant and corrosion-resistant steel wire rope. (b) The breaking...

32 CFR 700.872 - Ships and craft in drydock.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 32 National Defense 5 2013-07-01 2013-07-01 false Ships and craft in drydock. 700.872 Section 700... Special Circumstances/ships in Naval Stations and Shipyards § 700.872 Ships and craft in drydock. (a) The commanding officer of a ship in drydock shall be responsible for effecting adequate closure, during such...

32 CFR 700.872 - Ships and craft in drydock.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 32 National Defense 5 2012-07-01 2012-07-01 false Ships and craft in drydock. 700.872 Section 700... Special Circumstances/ships in Naval Stations and Shipyards § 700.872 Ships and craft in drydock. (a) The commanding officer of a ship in drydock shall be responsible for effecting adequate closure, during such...

32 CFR 700.872 - Ships and craft in drydock.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 32 National Defense 5 2014-07-01 2014-07-01 false Ships and craft in drydock. 700.872 Section 700... Special Circumstances/ships in Naval Stations and Shipyards § 700.872 Ships and craft in drydock. (a) The commanding officer of a ship in drydock shall be responsible for effecting adequate closure, during such...

Cloth Crafts of India: Cotton and Silk, Trade and History.

ERIC Educational Resources Information Center

Mueller, Peggy; Turkovich, Marilyn

This resource suggests that to study India without experiencing the life of the people as represented through their folk craft traditions would be a hollow venture. History and geography are conveyed in the symbols and figures that decorate Indian crafts. Basic beliefs, ancient symbols, and religious traditions are conveyed in recurring visual…

25 CFR 309.27 - How are complaints filed?

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 2 2010-04-01 2010-04-01 false How are complaints filed? 309.27 Section 309.27 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS... writing and addressed to the Director, Indian Arts and Crafts Board, Room 4004-MIB, U.S. Department of the...

46 CFR 133.175 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 46 Shipping 4 2011-10-01 2011-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by lashings...

46 CFR 108.575 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 46 Shipping 4 2013-10-01 2013-10-01 false Survival craft and rescue boat equipment. 108.575... DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.575 Survival craft and rescue boat equipment. (a) All lifeboat and rescue boat equipment must be as follows: (1) The equipment must be secured...

46 CFR 133.175 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by lashings...

46 CFR 133.175 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by lashings...

46 CFR 133.175 - Survival craft and rescue boat equipment.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 46 Shipping 4 2013-10-01 2013-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by lashings...

Leading to Crafting: The Relation Between Leadership Perception and Nurses' Job Crafting.

PubMed

Esteves, Tiago; Pereira Lopes, Miguel

2017-06-01

Whenever individuals adapt their jobs to make them closer of their personal preferences, they are performing job crafting. This study aims to investigate if the way nurses perceive their leaders' behaviors is related with job crafting development. To do so, a quantitative analysis was conducted among a group of 325 Portuguese nurses. Results indicate that the perception of an empowering leader was found to be strongly related with the increase of challenges in the work environment, and with the development of stronger relations with direct managers and co-workers, which are two job crafting dimensions. The perception of a directive leader was found to be positively related with the avoidance of performing hindering tasks. Strengthening relations with direct managers and co-workers was found to be particularly related to leadership perception. Theoretical and practical implications are discussed.

Application of CRAFT (complete reduction to amplitude frequency table) in nonuniformly sampled (NUS) 2D NMR data processing.

PubMed

Krishnamurthy, Krish; Hari, Natarajan

2017-09-15

The recently published CRAFT (complete reduction to amplitude frequency table) technique converts the raw FID data (i.e., time domain data) into a table of frequencies, amplitudes, decay rate constants, and phases. It offers an alternate approach to decimate time-domain data, with minimal preprocessing step. It has been shown that application of CRAFT technique to process the t 1 dimension of the 2D data significantly improved the detectable resolution by its ability to analyze without the use of ubiquitous apodization of extensively zero-filled data. It was noted earlier that CRAFT did not resolve sinusoids that were not already resolvable in time-domain (i.e., t 1 max dependent resolution). We present a combined NUS-IST-CRAFT approach wherein the NUS acquisition technique (sparse sampling technique) increases the intrinsic resolution in time-domain (by increasing t 1 max), IST fills the gap in the sparse sampling, and CRAFT processing extracts the information without loss due to any severe apodization. NUS and CRAFT are thus complementary techniques to improve intrinsic and usable resolution. We show that significant improvement can be achieved with this combination over conventional NUS-IST processing. With reasonable sensitivity, the models can be extended to significantly higher t 1 max to generate an indirect-DEPT spectrum that rivals the direct observe counterpart. Copyright © 2017 John Wiley & Sons, Ltd.

46 CFR 109.323 - Manning of survival craft and supervision.

Code of Federal Regulations, 2010 CFR

2010-10-01

... 46 Shipping 4 2010-10-01 2010-10-01 false Manning of survival craft and supervision. 109.323 Section 109.323 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS OPERATIONS Operation and Stowage of Safety Equipment § 109.323 Manning of survival craft and supervision. (a) There must be a sufficient...

Industrial Education. Mini-Course Cluster: Home Maintenance, Industrial Crafts, Photography. [Grade 9].

ERIC Educational Resources Information Center

Parma City School District, OH.

Part of a series of curriculum guides dealing with industrial education in junior high schools, this guide provides three units to be used in a one semester course in grade 9 on the subjects of industrial crafts, home maintenance, and photography. Among the industrial crafts included are leathercraft, plexiglass, decoupage, woodcraft, whittling,…

Searching the Soul: Veterans and Their Arts and Crafts

ERIC Educational Resources Information Center

Hasio, Cindy

2011-01-01

For military veterans suffering from the long-term trauma of warfare, arts and crafts become much more than the fabrication of relics; they can literally save the spirit. Dialogue and interaction between the veterans, volunteers, and staff are crucial to the success of veterans' arts and crafts program. The purpose of this research was threefold.…

77 FR 20526 - Airworthiness Directives; 328 Support Services GmbH Airplanes

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-05

... directive (AD) for all 328 Support Services GmbH (Type Certificate previously held by AvCraft Aerospace GmbH... GmbH (Type Certificate Previously Held by AvCraft Aerospace GmbH; Fairchild Dornier GmbH; Dornier... applies to 328 Support Services GmbH (Type Certificate previously held by AvCraft Aerospace GmbH...

Craft Lessons: Teaching Writing K-8. Second Edition

ERIC Educational Resources Information Center

Fletcher, Ralph; Portalupi, JoAnn

2007-01-01

Since its publication in 1998 Craft Lessons has become a mainstay of writing teachers, both new and experienced. Practical lessons--each printed on one page--and the instructional language geared to three grade-level groupings: K-2, 3-4, and 5-8 are contained in this book. In the decade since Craft Lessons' publication the world has changed in…

"Miss! I'm Done!" Finishing Craft Assignments as a Situated Activity System in Preschool

ERIC Educational Resources Information Center

Deunk, Marjolein; Berenst, Jan; de Glopper, Kees

2010-01-01

We describe the Situated Activity System of finishing craft assignments in preschool: the specific, routinized way that child and teacher jointly close the child's craft assignment, employing a specific discourse pattern. We analyzed the interactions of 14 Dutch children between 2.1 and 3.10 years old while they were finishing their craft…

In Search of Craft

ERIC Educational Resources Information Center

Schwalbe, Michael

2010-01-01

In the spring of 2009, this author asked the director of North Carolina State's Crafts Center to help him find people who might be willing to participate in a project about skill. Bill Wallace, an occasional teacher at the Crafts Center, was one of the people recommended to him. Bill Wallace is a man who can look at a tree and instinctively know…

The Hipster Librarian's Guide to Teen Craft Projects

ERIC Educational Resources Information Center

Coleman, Tina; Llanes, Peggie

2008-01-01

It's not your grandmother's crafting projects! Instead, hip librarians as well as their teen patrons can engage in the hottest new DIY way of life, recycling everything from discarded books to Altoids tins. Getting hands-on and making the coolest crafts can be a way to encourage teens' individuality and growing sense of self. Whether projects are…

The Role of Craft Industry in Germany's Social Market Economy. Social Report.

ERIC Educational Resources Information Center

Schroder, Karsten

1992-01-01

Social market economy success in the Federal Republic of Germany is due to free competition, enterprise in the business community, and employees' social security. Craft industries play a major role in Germany's market economy. The craft industry is second only to the manufacturing industry, comprising 23 percent of German firms. There are seven…

25 CFR 309.19 - What are examples of pottery and ceramics that are Indian products?

Code of Federal Regulations, 2011 CFR

2011-04-01

... products? 309.19 Section 309.19 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.19 What are examples of pottery and ceramics that are Indian products? (a) Pottery, ceramics, and related arts and crafts items made or significantly decorated by an...

25 CFR 307.3 - Granting of licenses, contract, and bond requirements.

Code of Federal Regulations, 2010 CFR

2010-04-01

.... 307.3 Section 307.3 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO ALL-WOOL... acceptable to the Indian Arts and Crafts Board providing for the use of such certificates in conformity with... the Indian Arts and Crafts Board, in the amount of $500, conditioned upon faithful performance of such...

Design and Craft Education in Iceland, Pedagogical Background and Development: A Literature Review

ERIC Educational Resources Information Center

Olafsson, Brynjar; Thorsteinsson, Gisli

2009-01-01

Sloyd pedagogy was introduced towards the close of the 18th century to Icelandic educators. Subsequently craft was established as a specific subject aimed at general education. In the beginning craft was called "school industry," to distinguish it from "home industry" whose aim was to help homes to be self-sufficient for…

Students' Attitudes towards Craft and Technology in Iceland and Finland

ERIC Educational Resources Information Center

Thorsteinsson, Gísli; Ólafsson, Brynjar; Autio, Ossi

2012-01-01

Craft education in both Finland and Iceland originated over 140 years ago and was influenced by the Scandinavian Sloyd pedagogy. Since then, the subject has moved away from craft and towards technology, with the aim being to increase students' technological abilities. In the beginning, the subject largely focused on the students copying artefacts,…

Crash Test Kids: Stealth Learning at Its Best

ERIC Educational Resources Information Center

Marshall, Kirk

2011-01-01

Building a human-powered flying craft can be much more complicated than one would first imagine. There are no "premade" plans available for this type of craft. In addition, the crafts needed to be built with some "style," or in other words, they should represent something other than a flying machine. The concept of launching a…

46 CFR 117.208 - Survival craft-vessels operating on rivers routes.

Code of Federal Regulations, 2010 CFR

2010-10-01

... certificated to operate on a rivers route in cold water must be provided with life floats of an aggregate... vessel certificated to operate on a rivers route in warm water is not required to carry survival craft... carry survival craft. (d) For a vessel certificated to operate on a rivers route in shallow water where...

The Blacksmith Craft Program at the BOCES Environmental Education Center at Brookville.

ERIC Educational Resources Information Center

Skliar, Norman

The purpose of this booklet is to introduce teachers and students to the Blacksmith's Shop, one of the many craft programs available for student participation at the Brookville Homestead site developed to recreate life as it was in the early days of Long Island's settlement. Active participation in the blacksmithing craft activity is designed to…

Development and Validation of the Job Crafting Scale

ERIC Educational Resources Information Center

Tims, Maria; Bakker, Arnold B.; Derks, Daantje

2012-01-01

We developed and validated a scale to measure job crafting behavior in three separate studies conducted in The Netherlands (total N=1181). Job crafting is defined as the self-initiated changes that employees make in their own job demands and job resources to attain and/or optimize their personal (work) goals. In Study 1 and 2 the Dutch job…

Creating Chicago History: Making Outreach Craft Activities Meaningful

ERIC Educational Resources Information Center

Karp, Madeline

2012-01-01

When it comes to having a traveling outreach activity for a museum, a craft can seem like the perfect solution. It can seemingly be all things at once--educational, quick and fun. But, if poorly constructed, crafts can also have serious fallbacks. Using the Chicago History Museum and the Millennium Park Family Fun Festival as a case study, this…

46 CFR 199.153 - Survival craft launching and recovery arrangements using falls and a winch.

Code of Federal Regulations, 2013 CFR

2013-10-01

... falls and a winch. 199.153 Section 199.153 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY... Requirements for All Vessels § 199.153 Survival craft launching and recovery arrangements using falls and a... appliances for free-fall launching arrangements, from a position within the survival craft. (b) Each fall...

46 CFR 199.153 - Survival craft launching and recovery arrangements using falls and a winch.

Code of Federal Regulations, 2014 CFR

2014-10-01

... falls and a winch. 199.153 Section 199.153 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY... Requirements for All Vessels § 199.153 Survival craft launching and recovery arrangements using falls and a... appliances for free-fall launching arrangements, from a position within the survival craft. (b) Each fall...

46 CFR 199.153 - Survival craft launching and recovery arrangements using falls and a winch.

Code of Federal Regulations, 2012 CFR

2012-10-01

... falls and a winch. 199.153 Section 199.153 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY... Requirements for All Vessels § 199.153 Survival craft launching and recovery arrangements using falls and a... appliances for free-fall launching arrangements, from a position within the survival craft. (b) Each fall...

Across the Learning Divide: Adults Learning in the Arts and Crafts.

ERIC Educational Resources Information Center

Carlton, Shiela; Sargant, Naomi

Learning about the arts and crafts gives individuals the means to examine themselves and their relationship with the world around them, whether through being an appreciative audience or their own creative practice. The arts and crafts are themselves industries creating jobs both in arts forms and in their support. People want and are entitled to…

25 CFR 309.2 - What are the key definitions for purposes of the Act?

Code of Federal Regulations, 2011 CFR

2011-04-01

... “made by an Indian” means that an Indian has provided the artistic or craft work labor necessary to implement an artistic design through a substantial transformation of materials to produce the art or craft... Indian artistic or craft work labor; (v) Industrial products, which for this purpose are defined as goods...

25 CFR 141.27 - Trade in imitation Indian crafts prohibited.

Code of Federal Regulations, 2013 CFR

2013-04-01

... 25 Indians 1 2013-04-01 2013-04-01 false Trade in imitation Indian crafts prohibited. 141.27 Section 141.27 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR FINANCIAL ACTIVITIES BUSINESS PRACTICES ON THE NAVAJO, HOPI AND ZUNI RESERVATIONS General Business Practices § 141.27 Trade in imitation Indian crafts prohibited. No person may...

25 CFR 309.2 - What are the key definitions for purposes of the Act?

Code of Federal Regulations, 2010 CFR

2010-04-01

....2 Section 309.2 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.2 What are the key definitions for purposes of the Act? (a) Indian...-member Indian artisan. (c) Indian arts and crafts organization means any legally established arts and...

25 CFR 309.19 - What are examples of pottery and ceramics that are Indian products?

Code of Federal Regulations, 2010 CFR

2010-04-01

... products? 309.19 Section 309.19 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.19 What are examples of pottery and ceramics that are Indian products? (a) Pottery, ceramics, and related arts and crafts items made or significantly decorated by an...

46 CFR 12.603 - Requirements to qualify for an STCW endorsement as able seafarer-deck.

Code of Federal Regulations, 2014 CFR

2014-10-01

... satisfactorily completed approved training in— (i) Proficiency in survival craft and rescue boats other than fast rescue boats (PSC); or (ii) Proficiency in survival craft and rescue boats, other than lifeboats or fast... completed approved training in— (i) Proficiency in survival craft and rescue boats, other than fast rescue...

77 FR 12163 - Airworthiness Directives; 328 Support Services GmbH (Type Certificate Previously Held by AvCraft...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-29

... Airworthiness Directives; 328 Support Services GmbH (Type Certificate Previously Held by AvCraft Aerospace GmbH; Fairchild Dornier GmbH; Dornier Luftfahrt GmbH) Airplanes AGENCY: Federal Aviation Administration (FAA... directive (AD) for all 328 Support Services GmbH (Type Certificate Previously Held by AvCraft Aerospace GmbH...

76 FR 42031 - Airworthiness Directives; 328 Support Services GmbH (Type Certificate Previously Held by AvCraft...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-07-18

... Airworthiness Directives; 328 Support Services GmbH (Type Certificate Previously Held by AvCraft Aerospace GmbH; Fairchild Dornier GmbH; Dornier Luftfahrt GmbH) Model 328-100 and -300 Airplanes AGENCY: Federal Aviation... 328 Support Services GmbH (Type Certificate Previously Held by AvCraft Aerospace GmbH; Fairchild...

78 FR 52872 - Airworthiness Directives; 328 Support Services GmbH (Type Certificate Previously Held by AvCraft...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-27

... Services GmbH (Type Certificate Previously Held by AvCraft Aerospace GmbH; Fairchild Dornier GmbH; Dornier Luftfahrt GmbH) Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed... certain 328 Support Services GmbH (Type Certificate Previously Held by AvCraft Aerospace GmbH; Fairchild...

Learning Practices of Femininity through Gendered Craft Education in Finland

ERIC Educational Resources Information Center

Kokko, Sirpa

2009-01-01

This paper discusses the processes and practices that link crafts and gender in the upbringing and education of girls. The paper is based on a study conducted among female primary school trainee teachers in Finland. The data are comprised of their experiences with crafts as schoolgirls. The methods of the study were memory work and writing of…

The Intelligence of the Hands: Studying the Origin of Pedagogical Craft Education

ERIC Educational Resources Information Center

Olafsson, Brynjar; Thorsteinsson, Gisli

2012-01-01

Pedagogical craft was established in the Scandinavia around 1950 under the name Sloyd. The ideology was developed by European educators from 16th and 17th century. Sloyd aimed to educate children holistically via a carefully structured system for teaching craft. The child became the centre of the educational activities and the development of the…

Effects of a job crafting intervention program on work engagement among Japanese employees: a pretest-posttest study.

PubMed

Sakuraya, Asuka; Shimazu, Akihito; Imamura, Kotaro; Namba, Katsuyuki; Kawakami, Norito

2016-10-24

Job crafting, an employee-initiated job design/redesign, has become important for employees' well-being such as work engagement. This study examined the effectiveness of a newly developed job crafting intervention program on work engagement (as primary outcome), as well as job crafting and psychological distress (as secondary outcomes), using a pretest-posttest study design among Japanese employees. Participants were managers of a private company and a private psychiatric hospital in Japan. The job crafting intervention program consisted of two 120-min sessions with a two-week interval between them. Outcomes were assessed at baseline (Time 1), post-intervention (Time 2), and a one-month follow-up (Time 3). The mixed growth model analyses were conducted using time (Time 1, Time 2, and Time 3) as an indicator of intervention effect. Effect sizes were calculated using Cohen's d. The program showed a significant positive effect on work engagement (t = 2.20, p = 0.03) in the mixed growth model analyses, but with only small effect sizes (Cohen's d = 0.33 at Time 2 and 0.26 at Time 3). The program also significantly improved job crafting (t = 2.36, p = 0.02: Cohen's d = 0.36 at Time 2 and 0.47 at Time 3) and reduced psychological distress (t = -2.06, p = 0.04: Cohen's d = -0.15 at Time 2 and -0.31 at Time 3). The study indicated that the newly developed job crafting intervention program was effective in increasing work engagement, as well as in improving job crafting and decreasing psychological distress, among Japanese managers. UMIN Clinical Trials Registry UMIN000024062 . Retrospectively registered 15 September 2016.

A randomized pilot clinical trial to evaluate the efficacy of Community Reinforcement and Family Training for Treatment Retention (CRAFT-T) for improving outcomes for patients completing opioid detoxification.

PubMed

Brigham, Gregory S; Slesnick, Natasha; Winhusen, Theresa M; Lewis, Daniel F; Guo, Xiamei; Somoza, Eugene

2014-05-01

Detoxification with psychosocial counseling remains a standard opioid-use disorder treatment practice but is associated with poor outcomes. This study tested the efficacy of a newly developed psychosocial intervention, Community Reinforcement Approach and Family Training for Treatment Retention (CRAFT-T), relative to psychosocial treatment as usual (TAU), for improving treatment outcomes. A randomized, 14-week trial with follow-up visits at 6 and 9 months post-randomization conducted at two substance use disorder (SUD) treatment programs. Opioid-dependent adults (i.e., identified patient - IP) enrolled in a residential buprenorphine-detoxification program and their identified concerned significant other (CSO) was randomized to CRAFT-T (n=28 dyads) or TAU (n=24 dyads). CRAFT-T consisted of two sessions with the IP and CSO together and 10 with the CSO alone, over 14 weeks. TAU for the CSOs was primarily educational and referral to self-help. All IPs received treatment as usually provided by the SUD program in which they were enrolled. The primary outcome was time to first IP drop from treatment lasting 30 days or more. Opioid and other drug use were key secondary outcomes. CRAFT-T resulted in a moderate but non-significant effect on treatment retention (p=0.058, hazard ratio=0.57). When the CSO was parental family, CRAFT-T had a large and significant effect on treatment retention (p<0.01, hazard ratio=.040). CRAFT-T had a significant positive effect on IP opioid and other drug use (p<0.0001). CRAFT-T is a promising treatment for opioid use disorder but replication is needed to confirm these results. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

Different types of employee well-being across time and their relationships with job crafting.

PubMed

Hakanen, Jari J; Peeters, Maria C W; Schaufeli, Wilmar B

2018-04-01

We used and integrated the circumplex model of affect (Russell, 1980) and the conservation of resources theory (Hobfoll, 1998) to hypothesize how various types of employee well-being, which can be differentiated on theoretical grounds (i.e., work engagement, job satisfaction, burnout, and workaholism), may differently predict various job crafting behaviors (i.e., increasing structural and social resources and challenging demands, and decreasing hindering demands) and each other over time. At Time 1, we measured employee well-being, and 4 years later at Time 2, job crafting and well-being, using a large sample of Finnish dentists (N = 1,877). The results of structural equation modeling showed that (a) work engagement positively predicted both types of increasing resources and challenging demands and negatively predicted decreasing hindering demands; (b) workaholism positively predicted increasing structural resources and challenging demands; (c) burnout positively predicted decreasing hindering demands and negatively predicted increasing structural resources, whereas (d) job satisfaction did not relate to job crafting over time; and (e) work engagement positively influenced job satisfaction and negatively influenced burnout, whereas (f) workaholism predicted burnout after controlling for baseline levels. Thus, work engagement was a stronger predictor of future job crafting and other types of employee well-being than job satisfaction. Although workaholism was positively associated with job crafting, it also predicted burnout. We conclude that the relationship between job crafting and employee well-being may be more complex than assumed, because the way in which employees will craft their jobs in the future seems to depend on how they currently feel. (PsycINFO Database Record (c) 2018 APA, all rights reserved).

BioCraft: Using Gamification to Stimulate Students' Motivation and Acquisition of Scientific Terms in a Bilingual Classroom

NASA Astrophysics Data System (ADS)

Turner, Kent Alan

Gamification is the act of introducing game elements in any aspect of life. In this case, it is a classroom. The operating model of BioCraft was a role-playing game that reinforced deaf students' use of new vocabulary in a gamified environment. BioCraft addressed the problem of deaf students acquiring scientific terms and using these scientific terms bilingually in academic language. BioCraft also established a student-centered learning atmosphere that promoted intersubjectivity, appropriation, and self-determination. In BioCraft, students became avatars of new organisms living on a new planet who needed to learn about living systems, adaptations, and genetics in order to survive. The results of the operating model suggested that gamification had an effect on deaf students' motivation and frequency of using new scientific terms with minimal persuasion from the teacher.

Construction and Validation of the Perceived Opportunity to Craft Scale.

PubMed

van Wingerden, Jessica; Niks, Irene M W

2017-01-01

We developed and validated a scale to measure employees' perceived opportunity to craft (POC) in two separate studies conducted in the Netherlands (total N = 2329). POC is defined as employees' perception of their opportunity to craft their job. In Study 1, the perceived opportunity to craft scale (POCS) was developed and tested for its factor structure and reliability in an explorative way. Study 2 consisted of confirmatory analyses of the factor structure and reliability of the scale as well as examination of the discriminant and criterion-related validity of the POCS. The results indicated that the scale consists of one dimension and could be reliably measured with five items. Evidence was found for the discriminant validity of the POCS. The scale also showed criterion-related validity when correlated with job crafting (+), job resources (autonomy +; opportunities for professional development +), work engagement (+), and the inactive construct cynicism (-). We discuss the implications of these findings for theory and practice.

Combating Terrorism Technical Support Office. 2008 Review

DTIC Science & Technology

2009-01-15

threat object displayed at the operator control unit of the robotic platform. Remote Utility Conversion Kit The Remote Utility Conversion Kit (RUCK) is a...three- dimensional and isometric simulations and games. Develop crowd models, adversarial behavior models, network-based simulations, mini-simulations...Craft-Littoral The modular unmanned surface craft-littoral ( MUSCL ) is a spin- off of EOD/LIC’s Unmanned Reconnaissance Observation Craft, developed

Arts and Crafts of the Mississippi Hills. ESEA, Title IV-C, 1982-83.

ERIC Educational Resources Information Center

Eaton, Barbara; Weatherford, Martha

An overview is presented of a 1982-83 Elementary and Secondary Education Act (ESEA), Title IV-C project, designed for 50 talented high school art students, to preserve the arts and crafts in the Mississippi hills area and to enrich existing arts and crafts curriculum. Steps are listed for implementing such a program, a simple program budget is…

The Development of Indian and Eskimo Art and Crafts in the Far North.

ERIC Educational Resources Information Center

Phillips, R. A. J.; And Others

The focus of the conference, "The Development of Indian and Eskimo Art and Crafts in the Far North," was the creation of a market for reputable Indian and Eskimo art work on an economically sound basis which would benefit both the native artists and the Canadian economy. Two governmental reports, "Northern Arts and Crafts" and…

Report: The New Brunswick Indian Arts and Crafts Association Workshop for Board Members. No. 165.

ERIC Educational Resources Information Center

Goddu, Roland; Nicholas, Darryl

This is a report on a training session conducted for the board members of the New Brunswick Indian Arts and Crafts Association with the aim of outlining purposes of the Association, and assisting in drawing up plans for a formal administrative structure among arts and crafts organizations. An administrative manual containing terms of reference…

Craft-Art as a Basis for Human Activity

ERIC Educational Resources Information Center

Karppinen, Seija

2008-01-01

This article based on my doctoral thesis examines the Basic Arts Education system in Finland, focusing on Basic Crafts Education and its description through action concepts. The main task of the study was to create a concept model. In the first part of the study a concept map was created from the practice of Basic Crafts Education. The aim of the…

Crafts Development and Marketing Manual. Appropriate Technologies for Development. Peace Corps Information Collection & Exchange Manual Series No. M-24.

ERIC Educational Resources Information Center

Ramsay, Caroline C.; And Others

This manual was developed to help Peace Corps volunteers assist local craftspeople in developing nations in initiating and operating small businesses to produce and market their products. The manual is organized in eight chapters that cover the following topics: the crafts environment, common problems and solutions for a crafts business,…

46 CFR 12.615 - Requirements to qualify for an STCW endorsement in proficiency in survival craft and rescue boats...

Code of Federal Regulations, 2014 CFR

2014-10-01

... proficiency in survival craft and rescue boats other than lifeboats and fast rescue boats-limited (PSC-limited... lifeboats and fast rescue boats-limited (PSC-limited). (a) To qualify for an STCW endorsement in proficiency in survival craft and rescue boats other than lifeboats and fast rescue boats-limited (PSC-limited...

Becoming Animated When Teaching Physics, Crafts and Drama Together: A Multidisciplinary Course for Student-Teachers

ERIC Educational Resources Information Center

Kallunki, Veera; Karppinen, Seija; Komulainen, Kauko

2017-01-01

This article examines a physics course for pre-service primary teachers in which physics, crafts and drama were taught together by connecting the standpoints of crafts and drama. The study was carried out by three university educators from these disciplines during an advanced optional course for student-teachers at the University of Helsinki in…

Validation of the Japanese version of the job crafting scale.

PubMed

Eguchi, Hisashi; Shimazu, Akihito; Bakker, Arnold B; Tims, Maria; Kamiyama, Kimika; Hara, Yujiro; Namba, Katsuyuki; Inoue, Akiomi; Ono, Masakatsu; Kawakami, Norito

2016-06-16

The aim of this study was to validate the Japanese version of the job crafting scale (JCS-J). JCS measures four independent job crafting dimensions, namely increasing structural job resources, decreasing hindering job demands, increasing social job resources, and increasing challenging job demands. The translated and back-translated JCS-J questionnaires were administered online to 972 employees of a Japanese manufacturing company. The data were then divided into independent explorative and confirmative samples. Exploratory and confirmatory factor analyses were performed to evaluate the factorial validity of JCS-J. The relationship with potential consequences of job crafting (e.g., job demands, job resources, and psychological well-being) was investigated to evaluate construct validity. Internal consistency was examined to evaluate the reliability of the four JCSs. An exploratory factor analysis extracted a five-factor solution. Decreasing hindering job demands was further split into two separate dimensions supporting a five- rather than four-factor structure. A series of confirmatory factor analyses revealed that the modified five-factor model that allows covariance between items fits the data best. Construct validity was generally supported by the expected correlations of each job crafting dimension with each corresponding job resource (+), job demand (+), and psychological well-being (+). Cronbach's α coefficient was sufficient for each of the four dimensions of job crafting (α ranged between 0.76 and 0.90). This study confirmed that JCS-J is an adequate measure of job crafting that can be used in the Japanese context.

Purpose and pleasure in late life: Conceptualising older women's participation in art and craft activities.

PubMed

Liddle, Jeannine L M; Parkinson, Lynne; Sibbritt, David W

2013-12-01

The fourth age, as the last stage of life, represents a final challenge to find personal meaning in the face of changing capacities, illness and disability. Participation in valued activities is important for sustaining interest in life and has been associated with enhanced health and well-being. Art and craft activities are a popular form of participation amongst women in late life with growing international interest in the potential for these types of activities to maintain health and well-being and address problems of social isolation. Drawing on open text comments from 114 women enrolled in the Australian Longitudinal Study on Women's Health and in-depth interviews with 23 women all aged in their eighties, this paper explores the nature of older women's participation in art and craft activities and conceptualises links between participation in these activities and health and well-being in late life. Participation in art and craft activities is complex and dynamic, comprising cognitive and physical processes infused with emotion and occurs in the context of social relationships, physical spaces, physical ailments and beliefs about the value of the activities. By participating in art and craft activities, older women find purpose in their lives, contributing to their subjective well-being whilst helping and being appreciated by others. They develop a self view as enabled and as such take on new art and craft challenges, continue to learn and develop as art and craft makers and remain open to new possibilities. © 2013.

Validation of the Japanese version of the job crafting scale

PubMed Central

Eguchi, Hisashi; Shimazu, Akihito; Bakker, Arnold B.; Tims, Maria; Kamiyama, Kimika; Hara, Yujiro; Namba, Katsuyuki; Inoue, Akiomi; Ono, Masakatsu; Kawakami, Norito

2016-01-01

Objectives: The aim of this study was to validate the Japanese version of the job crafting scale (JCS-J). JCS measures four independent job crafting dimensions, namely increasing structural job resources, decreasing hindering job demands, increasing social job resources, and increasing challenging job demands. Methods: The translated and back-translated JCS-J questionnaires were administered online to 972 employees of a Japanese manufacturing company. The data were then divided into independent explorative and confirmative samples. Exploratory and confirmatory factor analyses were performed to evaluate the factorial validity of JCS-J. The relationship with potential consequences of job crafting (e.g., job demands, job resources, and psychological well-being) was investigated to evaluate construct validity. Internal consistency was examined to evaluate the reliability of the four JCSs. Results: An exploratory factor analysis extracted a five-factor solution. Decreasing hindering job demands was further split into two separate dimensions supporting a five- rather than four-factor structure. A series of confirmatory factor analyses revealed that the modified five-factor model that allows covariance between items fits the data best. Construct validity was generally supported by the expected correlations of each job crafting dimension with each corresponding job resource (+), job demand (+), and psychological well-being (+). Cronbach's α coefficient was sufficient for each of the four dimensions of job crafting (α ranged between 0.76 and 0.90). Conclusions: This study confirmed that JCS-J is an adequate measure of job crafting that can be used in the Japanese context. PMID:27108643

Sequential Diels–Alder/[3,3]-sigmatropic rearrangement reactions of β-nitrostyrene with 3-methyl-1,3-pentadiene

PubMed Central

Pipic, Alma; Zeller, Matthias; Tsetsakos, Panagiota

2013-01-01

Summary The tin(IV)-catalyzed reaction of β-nitrostyrene with (E)-3-methyl-1,3-pentadiene in toluene afforded two major nitronic ester cycloadducts in 27% and 29% yield that arise from the reaction at the less substituted diene double bond. Also present were four cycloadducts from the reaction at the higher substituted diene double bond, two of which were the formal cycloadducts of (Z)-3-methyl-1,3-pentadiene. A Friedel–Crafts alkylation product from the reaction of the diene, β-nitrostyrene, and toluene was also obtained in 10% yield. The tin(IV)-catalyzed reaction of β-nitrostyrene with (Z)-3-methyl-1,3-pentadiene in dichloromethane afforded four nitronic ester cycloadducts all derived from the reaction at the higher substituted double bond. One cycloadduct was isolated in 45% yield and two others are formal adducts of the E-isomer of the diene. The product formation in these reactions is consistent with a stepwise mechanism involving a zwitterionic intermediate. The initially isolated nitronic ester cycloadducts underwent tin(IV)-catalyzed interconversion, presumably via zwitterion intermediates. Cycloadducts derived from the reaction at the less substituted double bond of (E)-3-methyl-1,3-pentadiene underwent a [3,3]-sigmatropic rearrangement on heating to afford 4-nitrocyclohexenes. Cycloadducts derived from the reaction at the higher substituted diene double bond of either diene failed to undergo a thermal rearrangement. Rates and success of the rearrangement are consistent with a concerted mechanism possessing a dipolar transition state. An initial assessment of substituent effects on the rearrangement process is presented. PMID:24204426

Morphological, spectroscopic and thermal studies of samarium chloride coordinated single crystal grown by slow evaporation method

NASA Astrophysics Data System (ADS)

Slathia, Goldy; Raina, Bindu; Gupta, Rashmi; Bamzai, K. K.

2018-05-01

The synthesis of samarium chloride coordinated single crystal was carried out at room temperature by slow evaporation method. The crystal possesses a well defined hexagonal morphology with six symmetrically equivalent growth sectors separated by growth boundaries. The theoretical morphology has been established by structural approach using Bravaise-Friedele-Donnaye-Harker (BFDH) law. Fourier transform infra red spectroscopy was carried in order to study the geometry and structure of the crystal. The detailed thermogravimetric analysis elucidates the thermal stability of the complex.

Statistical correlations in an ideal gas of particles obeying fractional exclusion statistics.

PubMed

Pellegrino, F M D; Angilella, G G N; March, N H; Pucci, R

2007-12-01

After a brief discussion of the concepts of fractional exchange and fractional exclusion statistics, we report partly analytical and partly numerical results on thermodynamic properties of assemblies of particles obeying fractional exclusion statistics. The effect of dimensionality is one focal point, the ratio mu/k_(B)T of chemical potential to thermal energy being obtained numerically as a function of a scaled particle density. Pair correlation functions are also presented as a function of the statistical parameter, with Friedel oscillations developing close to the fermion limit, for sufficiently large density.

25 CFR 309.25 - How can an individual be certified as an Indian artisan?

Code of Federal Regulations, 2011 CFR

2011-04-01

...? 309.25 Section 309.25 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.25 How can an individual be certified as an Indian artisan? (a) In... provided in section 107 of the Indian Arts and Crafts Act of 1990, Public Law 101-644, a tribe may not...

33 CFR 149.304 - What type and how many survival craft and rescue boats must a manned deepwater port have?

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false What type and how many survival craft and rescue boats must a manned deepwater port have? 149.304 Section 149.304 Navigation and... What type and how many survival craft and rescue boats must a manned deepwater port have? (a) Except as...

25 CFR 309.25 - How can an individual be certified as an Indian artisan?

Code of Federal Regulations, 2010 CFR

2010-04-01

...? 309.25 Section 309.25 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR PROTECTION OF INDIAN ARTS AND CRAFTS PRODUCTS § 309.25 How can an individual be certified as an Indian artisan? (a) In... provided in section 107 of the Indian Arts and Crafts Act of 1990, Public Law 101-644, a tribe may not...

Cooking and Hammering: Primary School Pupils' Concepts of Their Craft Skills

ERIC Educational Resources Information Center

Müürsepp, Mare; Kikkull, Andry

2014-01-01

The aim of the study is to clear the significance of craft skills for the pupils in age nine and twelve years. More than 200 pupils were asked to define, what are the most important skills for the pupils of their age. The results bring out that category of the skills related to craft subject is of the most presented categories in pupils' self…

33 CFR 149.303 - What survival craft and rescue boats may be used on a manned deepwater port?

Code of Federal Regulations, 2010 CFR

2010-07-01

... boats may be used on a manned deepwater port? 149.303 Section 149.303 Navigation and Navigable Waters... craft and rescue boats may be used on a manned deepwater port? (a) Each survival craft on a manned... subpart; or (2) A liferaft meeting the requirements of § 149.308 of this subpart. (b) Each rescue boat on...

33 CFR 149.303 - What survival craft and rescue boats may be used on a manned deepwater port?

Code of Federal Regulations, 2011 CFR

2011-07-01

... boats may be used on a manned deepwater port? 149.303 Section 149.303 Navigation and Navigable Waters... craft and rescue boats may be used on a manned deepwater port? (a) Each survival craft on a manned... subpart; or (2) A liferaft meeting the requirements of § 149.308 of this subpart. (b) Each rescue boat on...

33 CFR 149.303 - What survival craft and rescue boats may be used on a manned deepwater port?

Code of Federal Regulations, 2012 CFR

2012-07-01

... boats may be used on a manned deepwater port? 149.303 Section 149.303 Navigation and Navigable Waters... craft and rescue boats may be used on a manned deepwater port? (a) Each survival craft on a manned... subpart; or (2) A liferaft meeting the requirements of § 149.308 of this subpart. (b) Each rescue boat on...

46 CFR 12.613 - Requirements to qualify for an STCW endorsement in proficiency in survival craft and rescue boats...

Code of Federal Regulations, 2014 CFR

2014-10-01

... proficiency in survival craft and rescue boats other than fast rescue boats (PSC). 12.613 Section 12.613... STCW endorsement in proficiency in survival craft and rescue boats other than fast rescue boats (PSC... fast rescue boats (PSC), the applicant must— (1) Be at least 18 years of age; (2) Meet the requirements...

Two-craft Coulomb formation study about circular orbits and libration points

NASA Astrophysics Data System (ADS)

Inampudi, Ravi Kishore

This dissertation investigates the dynamics and control of a two-craft Coulomb formation in circular orbits and at libration points; it addresses relative equilibria, stability and optimal reconfigurations of such formations. The relative equilibria of a two-craft tether formation connected by line-of-sight elastic forces moving in circular orbits and at libration points are investigated. In circular Earth orbits and Earth-Moon libration points, the radial, along-track, and orbit normal great circle equilibria conditions are found. An example of modeling the tether force using Coulomb force is discussed. Furthermore, the non-great-circle equilibria conditions for a two-spacecraft tether structure in circular Earth orbit and at collinear libration points are developed. Then the linearized dynamics and stability analysis of a 2-craft Coulomb formation at Earth-Moon libration points are studied. For orbit-radial equilibrium, Coulomb forces control the relative distance between the two satellites. The gravity gradient torques on the formation due to the two planets help stabilize the formation. Similar analysis is performed for along-track and orbit-normal relative equilibrium configurations. Where necessary, the craft use a hybrid thrusting-electrostatic actuation system. The two-craft dynamics at the libration points provide a general framework with circular Earth orbit dynamics forming a special case. In the presence of differential solar drag perturbations, a Lyapunov feedback controller is designed to stabilize a radial equilibrium, two-craft Coulomb formation at collinear libration points. The second part of the thesis investigates optimal reconfigurations of two-craft Coulomb formations in circular Earth orbits by applying nonlinear optimal control techniques. The objective of these reconfigurations is to maneuver the two-craft formation between two charged equilibria configurations. The reconfiguration of spacecraft is posed as an optimization problem using the calculus of variations approach. The optimality criteria are minimum time, minimum acceleration of the separation distance, minimum Coulomb and electric propulsion fuel usage, and minimum electrical power consumption. The continuous time problem is discretized using a pseudospectral method, and the resulting finite dimensional problem is solved using a sequential quadratic programming algorithm. The software package, DIDO, implements this approach. This second part illustrates how pseudospectral methods significantly simplify the solution-finding process.

Conceptual design of a manned orbital transfer vehicle

NASA Technical Reports Server (NTRS)

Davis, Richard; Duquette, Miles; Fredrick, Rebecca; Schumacher, Daniel; Somers, Schaeffer; Stafira, Stanley; Williams, James; Zelinka, Mark

1988-01-01

With the advent of the manned space station, man now requires a spacecraft based on the space station with the ability to deploy, recover, and repair satellites quickly and economically. Such a craft would prolong and enhance the life and performance of many satellites. A basic design was developed for an orbital tansfer vehicle (OTV). The basic design criteria are discussed. The design of the OTV and systems were researched in the following areas: avionics, crew systems, electrical power systems, environmental control/life support systems, navigation and orbital maneuvers, propulsion systems, reaction control systems (RCS), servicing systems, and structures. The basic concepts in each of the areas are summarized.

Self-reported craft expertise predicts maintenance of spatial ability in old age.

PubMed

Bailey, Shannon K T; Sims, Valerie K

2014-05-01

Three hundred and three female participants between the ages of 18 and 77 reported their experience in crafting (sewing, knitting, and crocheting) and completed a measure of spatial ability: The Paper Folding Test. To investigate the connection between spatial ability performance, age, and craft expertise, an ANOVA was conducted for the Paper Folding Test using two levels of crafting expertise (High and Low) and three age categories (younger adults: 18-39, middle-aged adults: 40-59, and older adults: 60-77). Performance on the spatial ability test declined with age as predicted from previous literature. However, there was a significant Age by Expertise interaction. No difference was found between High and Low craft expertise groups in younger adults (18-39), but there was a growing difference between expertise groups in middle-aged adults (40-59) and older adults (60-77). The results suggest that continued hands-on experience in spatial domains is a predictor of maintenance of spatial ability across the life span.

Produkt, Fenomen, Upplevelse. Proceedings of a Nordic Symposium (Helsinki, Finland, November 7-9, 1996). Research in Sloyd Education and Crafts Science B:3.

ERIC Educational Resources Information Center

Seitamaa-Hakkarainen, Pirita, Ed.; Uotila, Minna, Ed.

This anthology consists of 7 presentations given by invited speakers and 15 essays that show how crafts form both a theoretical and practical discourse that deals with the most varied individual, cultural, and behavioral phenomena. They involve the concept of sloyd, derived from a Swedish word, an umbrella term for making or crafting things by…

Approaches to the Nature of Educational Sloyd and Craft. Sloyd Competence in Nordic Culture. Part III. Research in Sloyd Education and Crafts Science B:2.

ERIC Educational Resources Information Center

Lindfors, Linnea, Ed.; Peltonen, Juhani, Ed.; Porko, Mia, Ed.

These nine articles deal with basic philosophical questions concerned with the general nature of sloyd or with the educational aspect of sloyd. (Sloyd, derived from a Swedish word, is an umbrella term for making or crafting things by hand.) They report research on cultural questions related to goals and contents, ranging from sociocultural…

Alaska birch crafts and gifts: marketing practices and demographics.

Treesearch

Rosemarie Braden; David Nicholls

2004-01-01

Craft and gift producers in Alaska who use birch as a primary species were surveyed via mail, telephone calls, and site visits. Forty-two usable mail surveys were obtained for a response rate of 38.5 percent. Firms were in business an average of 13 years and utilized an average of 4,778 board feet of birch per year to produce a variety of craft items, including turned...

An Enquiry into Primary Student Teachers' Confidence, Feelings and Attitudes towards Teaching Arts and Crafts in Finland and Malta during Initial Teacher Training

ERIC Educational Resources Information Center

Gatt, Isabelle; Karppinen, Seija

2014-01-01

Arts and crafts are connected with a variety of emotions, and the prospect of teaching these subjects could be a source of other emotions, not necessarily positive. This study explores the feelings and attitudes of student teachers towards arts and crafts prior to any training within their degree course and examines any changes that occur…

33 CFR 149.303 - What survival craft and rescue boats may be used on a manned deepwater port?

Code of Federal Regulations, 2013 CFR

2013-07-01

... boats may be used on a manned deepwater port? 149.303 Section 149.303 Navigation and Navigable Waters... craft and rescue boats may be used on a manned deepwater port? (a) Each survival craft on a manned... part; or (2) A liferaft meeting the requirements of § 149.308 of this part. (b) Each rescue boat on a...

33 CFR 149.303 - What survival craft and rescue boats may be used on a manned deepwater port?

Code of Federal Regulations, 2014 CFR

2014-07-01

... boats may be used on a manned deepwater port? 149.303 Section 149.303 Navigation and Navigable Waters... craft and rescue boats may be used on a manned deepwater port? (a) Each survival craft on a manned... part; or (2) A liferaft meeting the requirements of § 149.308 of this part. (b) Each rescue boat on a...

The craft of intensive care medicine.

PubMed

Carmel, Simon

2013-06-01

The practice of medicine is often represented as a dualism: is medicine a 'science' or an 'art'? This dualism has been long-lasting, with evident appeal for the medical profession. It also appears to have been rhetorically powerful, for example in enabling clinicians to resist the encroachment of 'scientific' evidence-based medicine into core areas of medical work such as individual clinical judgement. In this article I want to make the case for a more valid conceptualisation of medical practice: that it is a 'craft' activity. The case I make is founded on a theoretical synthesis of the concept of craft, combined with an analysis of ethnographic observations of routine medical practice in intensive care. For this context the craft aspects of medical work can be seen in how biomedical and other types of knowledge are used in practice, the embodied skills and practical judgement of practitioners and the technological and material environment. These aspects are brought together in two conceptual dimensions for 'craft': first, the application of knowledge; second, interaction with the material world. Some practical and political implications of a 'craft' metaphor for medical practice are noted. © 2013 The Author. Sociology of Health & Illness © 2013 Foundation for the Sociology of Health & Illness/John Wiley & Sons Ltd.

Job crafting, work engagement, and psychological distress among Japanese employees: a cross-sectional study.

PubMed

Sakuraya, Asuka; Shimazu, Akihito; Eguchi, Hisashi; Kamiyama, Kimika; Hara, Yujiro; Namba, Katsuyuki; Kawakami, Norito

2017-01-01

Job crafting, an employee-initiated job design/redesign, has become important for employees' well-being. However, most studies on the relationship between job crafting and employees' well-being have been conducted in western countries; thus, it is unclear whether job crafting can be effectively applied to Asian cultures, such as Japan, which emphasizes group harmony. The aim of this study was to examine the cross-sectional associations of self-reported job crafting with work engagement and psychological distress among employees in Japan. A questionnaire survey through the internet was conducted among all employees of a manufacturing company in Japan. We analyzed the data from 894 respondents, all employees with regular employment. Job crafting, work engagement, and psychological distress were assessed using the Japanese version of the Job Crafting Questionnaire, the Japanese version of the Utrecht Work Engagement Scale (UWES), and the Brief Job Stress Questionnaire (BJSQ), respectively. Hierarchical multiple regression showed that increasing structural job resources, social job resources, and challenging job demands was significantly and positively associated with work engagement ( β  = 0.31, p  < 0.001; β  = 0.14, p  < 0.001; β  = 0.36, p  < 0.001, respectively). For psychological distress, increasing structural job resources was significantly and negatively associated with psychological distress ( β  = -0.15, p  < 0.001). Our study suggests that increasing structural job resources is associated with higher work engagement and lower psychological distress. In addition, increasing social job resources and challenging job demands are also associated with higher work engagement.

Tailoring a family-based alcohol intervention for Aboriginal Australians, and the experiences and perceptions of health care providers trained in its delivery

PubMed Central

2014-01-01

Background Aboriginal Australians experience a disproportionately high burden of alcohol-related harm compared to the general Australian population. Alcohol treatment approaches that simultaneously target individuals and families offer considerable potential to reduce these harms if they can be successfully tailored for routine delivery to Aboriginal Australians. The Community Reinforcement Approach (CRA) and Community Reinforcement and Family Training (CRAFT) are two related interventions that are consistent with Aboriginal Australians’ notions of health and wellbeing. This paper aims to describe the process of tailoring CRA and CRAFT for delivery to Aboriginal Australians, explore the perceptions of health care providers participating in the tailoring process, and their experiences of participating in CRA and CRAFT counsellor certification. Methods Data sources included notes recorded from eight working group meetings with 22 health care providers of a drug and alcohol treatment agency and Aboriginal Community Controlled Health Service (November 2009-February 2013), and transcripts of semi-structured interviews with seven health care providers participating in CRA and CRAFT counsellor certification (May 2012). Qualitative content analysis was used to categorise working group meeting notes and interview transcripts were into key themes. Results Modifying technical language, reducing the number of treatment sessions, and including an option for treatment of clients in groups, were key recommendations by health care providers for improving the feasibility and applicability of delivering CRA and CRAFT to Aboriginal Australians. Health care providers perceived counsellor certification to be beneficial for developing their skills and confidence in delivering CRA and CRAFT, but identified time constraints and competing tasks as key challenges. Conclusions The tailoring process resulted in Aboriginal Australian-specific CRA and CRAFT resources. The process also resulted in the training and certification of health care providers in CRA and CRAFT and the establishment of a local training and certification program. PMID:24708838

Tailoring a family-based alcohol intervention for Aboriginal Australians, and the experiences and perceptions of health care providers trained in its delivery.

PubMed

Calabria, Bianca; Clifford, Anton; Rose, Miranda; Shakeshaft, Anthony P

2014-04-07

Aboriginal Australians experience a disproportionately high burden of alcohol-related harm compared to the general Australian population. Alcohol treatment approaches that simultaneously target individuals and families offer considerable potential to reduce these harms if they can be successfully tailored for routine delivery to Aboriginal Australians. The Community Reinforcement Approach (CRA) and Community Reinforcement and Family Training (CRAFT) are two related interventions that are consistent with Aboriginal Australians' notions of health and wellbeing. This paper aims to describe the process of tailoring CRA and CRAFT for delivery to Aboriginal Australians, explore the perceptions of health care providers participating in the tailoring process, and their experiences of participating in CRA and CRAFT counsellor certification. Data sources included notes recorded from eight working group meetings with 22 health care providers of a drug and alcohol treatment agency and Aboriginal Community Controlled Health Service (November 2009-February 2013), and transcripts of semi-structured interviews with seven health care providers participating in CRA and CRAFT counsellor certification (May 2012). Qualitative content analysis was used to categorise working group meeting notes and interview transcripts were into key themes. Modifying technical language, reducing the number of treatment sessions, and including an option for treatment of clients in groups, were key recommendations by health care providers for improving the feasibility and applicability of delivering CRA and CRAFT to Aboriginal Australians. Health care providers perceived counsellor certification to be beneficial for developing their skills and confidence in delivering CRA and CRAFT, but identified time constraints and competing tasks as key challenges. The tailoring process resulted in Aboriginal Australian-specific CRA and CRAFT resources. The process also resulted in the training and certification of health care providers in CRA and CRAFT and the establishment of a local training and certification program.

Modeling the formation of the quench product in municipal solid waste incineration (MSWI) bottom ash.

PubMed

Inkaew, Kanawut; Saffarzadeh, Amirhomayoun; Shimaoka, Takayuki

2016-06-01

This study investigated changes in bottom ash morphology and mineralogy under lab-scale quenching conditions. The main purpose was to clarify the mechanisms behind the formation of the quench product/layer around bottom ash particles. In the experiments, the unquenched bottom ashes were heated to 300°C for 1h, and were quenched by warm water (65°C) with different simulated conditions. After having filtered and dried, the ashes were analyzed by a combination of methodologies namely, particle size distribution analysis, intact particle and thin-section observation, X-ray diffractometry, and scanning electron microscope with energy dispersive X-ray spectroscopy. The results indicated that after quenching, the morphology and mineralogy of the bottom ash changed significantly. The freshly quenched bottom ash was dominated by a quench product that was characterized by amorphous and microcrystalline calcium-silicate-hydrate (CSH) phases. This product also enclosed tiny minerals, glasses, ceramics, metals, and organic materials. The dominant mineral phases produced by quenching process and detected by XRD were calcite, Friedel's salt, hydrocalumite and portlandite. The formation of quench product was controlled by the fine fraction of the bottom ash (particle size <0.425mm). From the observations, a conceptual model of the ash-water reactions and formation of the quench product in the bottom ash was proposed. Copyright © 2016 Elsevier Ltd. All rights reserved.

Effect of temperature on the durability of class C fly ash belite cement in simulated radioactive liquid waste: synergy of chloride and sulphate ions.

PubMed

Guerrero, A; Goñi, S; Allegro, V R

2009-06-15

The durability of class C fly ash belite cement (FABC-2-W) in simulated radioactive liquid waste (SRLW) rich in a mixed sodium chloride and sulphate solution is presented here. The effect of the temperature and potential synergic effect of chloride and sulfate ions are discussed. This study has been carried out according to the Koch-Steinegger test, at the temperature of 20 degrees C and 40 degrees C during a period of 180 days. The durability has been evaluated by the changes of the flexural strength of mortar, fabricated with this cement, immersed in a simulated radioactive liquid waste rich in sulfate (0.5M), chloride (0.5M) and sodium (1.5M) ions--catalogued like severely aggressive for the traditional Portland cement--and demineralised water, which was used as reference. The reaction mechanism of sulphate, chloride and sodium ions with the mortar was evaluated by scanning electron microscopy (SEM), porosity and pore-size distribution, and X-ray diffraction (XRD). The results showed that the chloride binding and formation of Friedel's salt was inhibited by the presence of sulphate. Sulphate ion reacts preferentially with the calcium aluminate hydrates forming non-expansive ettringite which precipitated inside the pores; the microstructure was refined and the mechanical properties enhanced. This process was faster and more marked at 40 degrees C.

Generic Skills. Secondary School Vocational Model for Craft Trades. Based on Data on the Use of 588 Tool Skills from 1600 Workers and Supervisors in 131 Occupations.

ERIC Educational Resources Information Center

Smith, Arthur De W.

This pamphlet provides a hierarchy of skills, from those most often used in the craft trades to those less frequently used, indicating the extent to which these skills are used by workers in 24 different occupational groups. The pamphlet also provides a secondary school vocational model for craft trades along with lists of the identified skills.…

OPTIC: Orbiting Plutonian Topographic Image Craft Proposal for an Unmanned Mission to Pluto

NASA Technical Reports Server (NTRS)

Kelly, Jonathan E.; Hein, Randall John; Meyer, David Lee; Robinson, David Mark; Endre, Mark James; Summers, Eric W.

1990-01-01

The proposal for an unmanned probe to Pluto is presented and described. The Orbiting Plutonian Topographic Image Craft's (OPTIC's) trip will take twenty years and after its arrival, will begin its data collection which includes image and radar mapping, surface spectral analysis, and magnetospheric studies. This probe's design was developed based on the request for proposal of an unmanned probe to Pluto requirements. The distinct problems which an orbiter causes for each subsystem of the craft are discussed. The final design revolved around two important factors: (1) the ability to collect and return the maximum quantity of information on the Plutonian system; and (2) the weight limitations which the choice of an orbiting craft implied. The velocity requirements of this type of mission severely limited the weight available for mission execution-owing to the large portion of overall weight required as fuel to fly the craft with present technology. The topics covered include: (1) scientific instrumentation; (2) mission management; (3) power and propulsion; (4) attitude and articulation control; (5) structural subsystems; and (6) command, control, and communication.

Productive and counterproductive job crafting: A daily diary study.

PubMed

Demerouti, Evangelia; Bakker, Arnold B; Halbesleben, Jonathon R B

2015-10-01

The present study aims to uncover the way daily job crafting influences daily job performance (i.e., task performance, altruism, and counterproductive work behavior). Job crafting was conceptualized as "seeking resources," "seeking challenges," and "reducing demands" and viewed as strategies individuals use to optimize their job characteristics. We hypothesized that daily job crafting relates to daily job demands and resources (work pressure and autonomy), which consequently relate to daily work engagement and exhaustion and ultimately to job performance. A sample of 95 employees filled in a quantitative diary for 5 consecutive working days (n occasions = 475). We predicted and found that daily seeking resources was positively associated with daily task performance because daily autonomy and work engagement increased. In contrast, daily reducing demands was detrimental for daily task performance and altruism, because employees lower their daily workload and consequently their engagement and exhaustion, respectively. Only daily seeking challenges was positively (rather than negatively) associated with daily counterproductive behavior. We conclude that employee job crafting can have both beneficial and detrimental effects on job performance. (c) 2015 APA, all rights reserved).

Electrostatic energy and screened charge interaction near the surface of metals with different Fermi surface shape

NASA Astrophysics Data System (ADS)

Gabovich, A. M.; Il'chenko, L. G.; Pashitskii, E. A.; Romanov, Yu. A.

1980-04-01

Using the Poisson equation Green function for a self-consistent field in a spatially inhomogeneous system, expressions for the electrostatic energy and screened charge interaction near the surface of a semi-infinite metal and a thin quantizing film are derived. It is shown that the decrease law and Friedel oscillation amplitude of adsorbed atom indirect interaction are determined by the electron spectrum character and the Fermi surface shape. The results obtained enable us to explain, in particular, the submonolayer adsorbed film structure on the W and Mo surfaces.

Surface Phonons and Polaritons.

DTIC Science & Technology

1976-01-01

by M. Balkaneki ( Flammarion Sciences , Paris , 1978) , p. 298 . —-——.——~~~~~~~~‘-,--—-—— - r r ~~~~~~~~~~~~~~ ~~-~r - wwr~~~~~~~~~~~ wr...inivasan, in Lattice Dynamics Edited by K. -~ Balkanski ( Flammarion Sciences , Paris , 1978), p. 305. 46. I. K. Lifshitz and L. U. Rosenzweig , Zh. Ekap...Lattice Dynamics,” Ed. M. Balkanski ( Flammarion Sciences, Paris, 1978), p. 280. 7. L. Dobrzynski and J . Friedel, Surface Sc 12, 469 (1968). 8. L

The Dynairship. [structural design criteria and feasibility analysis of an airplane - airship

NASA Technical Reports Server (NTRS)

Miller, W. M., Jr.

1975-01-01

A feasibility analysis for the construction and use of a combination airplane-airship named 'Dynairship' is undertaken. Payload capacities, fuel consumption, and the structural design of the craft are discussed and compared to a conventional commercial aircraft (a Boeing 747). Cost estimates of construction and operation of the craft are also discussed. The various uses of the craft are examined (i.e, in police work, materials handling, and ocean surveillance), and aerodynamic configurations and photographs are shown.

An overview of the British Aerospace HOTOL transatmospheric vehicle

NASA Technical Reports Server (NTRS)

Mesnard, J.

1986-01-01

British Aerospace's space-going aircraft and economical launcher Hotol, so named for its horizontal take-off and landing ability, is described. The craft uses Rolls Royce's new Swallow engine, the principle behind which is still secret, which burns atmospheric oxygen until it leaves the atmosphere and then switches to liquid oxygen. This lightens the craft's fuel load tremendously, so that it can carry significant payloads and still take off and land like a normal airplane. A typical future mission for the craft is described.

Crafts.

ERIC Educational Resources Information Center

Hansen, Karen

1991-01-01

Presents crafts projects to accompany the discussion of African tribes and their ceremonial items. The article describes how to create a ceremonial mask, ceremonial shield, goodbye cloth, and necklace. Background information is included for each item. (SM)

Mycotoxin profiling of 1000 beer samples with a special focus on craft beer

PubMed Central

van Dam, Ruud; van Doorn, Ronald; Katerere, David; Berthiller, Franz; Haasnoot, Willem; Nielen, Michel W. F.

2017-01-01

Currently beer is booming, mainly due to the steady rise of craft breweries worldwide. Previous surveys for occurrence of mycotoxins in beer, were mainly focussed on industrial produced beer. The present survey reports the presence of mycotoxins in craft beer and how this compares to industrial produced beer. More than 1000 beers were collected from 47 countries, of which 60% were craft beers. A selection of 1000 samples were screened for the presence of aflatoxin B1, ochratoxin A (OTA), zearalenone (ZEN), fumonisins (FBs), T-2 and HT-2 toxins (T-2 and HT-2) and deoxynivalenol (DON) using a mycotoxin 6-plex immunoassay. For confirmatory analysis, a liquid chromatography tandem mass spectrometry (LC-MS/MS) method was developed and applied. The 6-plex screening showed discrepancies with the LC-MS/MS analysis, possibly due to matrix interference and/or the presence of unknown mycotoxin metabolites. The major mycotoxins detected were DON and its plant metabolite deoxynivalenol-3-β-D-glucopyranoside (D3G). The 6-plex immunoassay reported the sum of DON and D3G (DON+D3G) contaminations ranging from 10 to 475 μg/L in 406 beers, of which 73% were craft beers. The popular craft beer style imperial stout, had the highest percentage of samples suspected positive (83%) with 29% of all imperial stout beers having DON+D3G contaminations above 100 μg/L. LC-MS/MS analysis showed that industrial pale lagers from Italy and Spain, predominantly contained FBs (3–69 μg/L). Besides FBs, African traditional beers also contained aflatoxins (0.1–1.2 μg/L). The presence of OTA, T-2, HT-2, ZEN, β-zearalenol, 3/15-acetyl-DON, nivalenol and the conjugated mycotoxin zearalenone 14-sulfate were confirmed in some beers. This study shows that in 27 craft beers, DON+D3G concentrations occurred above (or at) the Tolerable Daily Intake (TDI). Exceeding the TDI, may have a health impact. A better control of brewing malts for craft beer, should be put in place to circumvent this potential problem. PMID:28982162

Mycotoxin profiling of 1000 beer samples with a special focus on craft beer.

PubMed

Peters, Jeroen; van Dam, Ruud; van Doorn, Ronald; Katerere, David; Berthiller, Franz; Haasnoot, Willem; Nielen, Michel W F

2017-01-01

Currently beer is booming, mainly due to the steady rise of craft breweries worldwide. Previous surveys for occurrence of mycotoxins in beer, were mainly focussed on industrial produced beer. The present survey reports the presence of mycotoxins in craft beer and how this compares to industrial produced beer. More than 1000 beers were collected from 47 countries, of which 60% were craft beers. A selection of 1000 samples were screened for the presence of aflatoxin B1, ochratoxin A (OTA), zearalenone (ZEN), fumonisins (FBs), T-2 and HT-2 toxins (T-2 and HT-2) and deoxynivalenol (DON) using a mycotoxin 6-plex immunoassay. For confirmatory analysis, a liquid chromatography tandem mass spectrometry (LC-MS/MS) method was developed and applied. The 6-plex screening showed discrepancies with the LC-MS/MS analysis, possibly due to matrix interference and/or the presence of unknown mycotoxin metabolites. The major mycotoxins detected were DON and its plant metabolite deoxynivalenol-3-β-D-glucopyranoside (D3G). The 6-plex immunoassay reported the sum of DON and D3G (DON+D3G) contaminations ranging from 10 to 475 μg/L in 406 beers, of which 73% were craft beers. The popular craft beer style imperial stout, had the highest percentage of samples suspected positive (83%) with 29% of all imperial stout beers having DON+D3G contaminations above 100 μg/L. LC-MS/MS analysis showed that industrial pale lagers from Italy and Spain, predominantly contained FBs (3-69 μg/L). Besides FBs, African traditional beers also contained aflatoxins (0.1-1.2 μg/L). The presence of OTA, T-2, HT-2, ZEN, β-zearalenol, 3/15-acetyl-DON, nivalenol and the conjugated mycotoxin zearalenone 14-sulfate were confirmed in some beers. This study shows that in 27 craft beers, DON+D3G concentrations occurred above (or at) the Tolerable Daily Intake (TDI). Exceeding the TDI, may have a health impact. A better control of brewing malts for craft beer, should be put in place to circumvent this potential problem.

Arts/Crafts.

ERIC Educational Resources Information Center

Instructor, 1980

1980-01-01

Described are various arts and crafts ideas, mostly with a February theme. Included are: ceramic boxes, valentine ideas, and patriotic projects--symbols of our country, silhouettes of George Washington and Abraham Lincoln, and stars and stripes. (KC)

Nonlinear Analysis of Two-phase Circumferential Motion in the Ablation Circumstance

NASA Astrophysics Data System (ADS)

Xiao-liang, Xu; Hai-ming, Huang; Zi-mao, Zhang

2010-05-01

In aerospace craft reentry and solid rocket propellant nozzle, thermal chemistry ablation is a complex process coupling with convection, heat transfer, mass transfer and chemical reaction. Based on discrete vortex method (DVM), thermal chemical ablation model and particle kinetic model, a computational module dealing with the two-phase circumferential motion in ablation circumstance is designed, the ablation velocity and circumferential field can be thus calculated. The calculated nonlinear time series are analyzed in chaotic identification method: relative chaotic characters such as correlation dimension and the maximum Lyapunov exponent are calculated, fractal dimension of vortex bulbs and particles distributions are also obtained, thus the nonlinear ablation process can be judged as a spatiotemporal chaotic process.

Virtual World Astrosociology

NASA Astrophysics Data System (ADS)

Bainbridge, William Sims

2010-01-01

This essay introduces the opportunity for theory development and even empirical research on some aspects of astrosociology through today's online virtual worlds. The examples covered present life on other planets or in space itself, in a manner that can be experienced by the user and where the user's reactions may simulate to some degree future human behavior in real extraterrestrial environments: Tabula Rasa, Anarchy Online, Entropia Universe, EVE Online, StarCraft and World of Warcraft. Ethnographic exploration of these computerized environments raises many questions about the social science both of space exploration and of direct contact with extraterrestrials. The views expressed in this essay do not necessarily represent the views of the National Science Foundation or the United States.

46 CFR 10.109 - Classification of endorsements.

Code of Federal Regulations, 2014 CFR

2014-10-01

... survival craft and rescue boats other than fast rescue boats (PSC). (16) Proficiency in survival craft and rescue boats other than fast rescue boats—limited (PSC—limited). (17) Proficiency in fast rescue boats...

Experimental Investigation of a Wing-in-Ground Effect Craft

PubMed Central

Tofa, M. Mobassher; Ahmed, Yasser M.; Jamei, Saeed; Priyanto, Agoes; Rahimuddin

2014-01-01

The aerodynamic characteristics of the wing-in-ground effect (WIG) craft model that has a noble configuration of a compound wing was experimentally investigated and Universiti Teknologi Malaysia (UTM) wind tunnel with and without endplates. Lift and drag forces, pitching moment coefficients, and the centre of pressure were measured with respect to the ground clearance and the wing angle of attack. The ground effect and the existence of the endplates increase the wing lift-to-drag ratio at low ground clearance. The results of this research work show new proposed design of the WIG craft with compound wing and endplates, which can clearly increase the aerodynamic efficiency without compromising the longitudinal stability. The use of WIG craft is representing an ambitious technology that will help in reducing time, effort, and money of the conventional marine transportation in the future. PMID:24701170

Experimental investigation of a wing-in-ground effect craft.

PubMed

Tofa, M Mobassher; Maimun, Adi; Ahmed, Yasser M; Jamei, Saeed; Priyanto, Agoes; Rahimuddin

2014-01-01

The aerodynamic characteristics of the wing-in-ground effect (WIG) craft model that has a noble configuration of a compound wing was experimentally investigated and Universiti Teknologi Malaysia (UTM) wind tunnel with and without endplates. Lift and drag forces, pitching moment coefficients, and the centre of pressure were measured with respect to the ground clearance and the wing angle of attack. The ground effect and the existence of the endplates increase the wing lift-to-drag ratio at low ground clearance. The results of this research work show new proposed design of the WIG craft with compound wing and endplates, which can clearly increase the aerodynamic efficiency without compromising the longitudinal stability. The use of WIG craft is representing an ambitious technology that will help in reducing time, effort, and money of the conventional marine transportation in the future.

A Control Law Design Method Facilitating Control Power, Robustness, Agility, and Flying Qualities Tradeoffs: CRAFT

NASA Technical Reports Server (NTRS)

Murphy, Patrick C.; Davidson, John B.

1998-01-01

A multi-input, multi-output control law design methodology, named "CRAFT", is presented. CRAFT stands for the design objectives addressed, namely, Control power, Robustness, Agility, and Flying Qualities Tradeoffs. The methodology makes use of control law design metrics from each of the four design objective areas. It combines eigenspace assignment, which allows for direct specification of eigenvalues and eigenvectors, with a graphical approach for representing the metrics that captures numerous design goals in one composite illustration. Sensitivity of the metrics to eigenspace choice is clearly displayed, enabling the designer to assess the cost of design tradeoffs. This approach enhances the designer's ability to make informed design tradeoffs and to reach effective final designs. An example of the CRAFT methodology applied to an advanced experimental fighter and discussion of associated design issues are provided.

Job crafting in changing organizations: Antecedents and implications for exhaustion and performance.

PubMed

Petrou, Paraskevas; Demerouti, Evangelia; Schaufeli, Wilmar B

2015-10-01

The present study addressed employee job crafting behaviors (i.e., seeking resources, seeking challenges, and reducing demands) in the context of organizational change. We examined predictors of job crafting both at the organizational level (i.e., perceived impact of the implemented changes on the working life of employees) and the individual level (i.e., employee willingness to follow the changes). Job crafting behaviors were expected to predict task performance and exhaustion. Two-wave longitudinal data from 580 police officers undergoing organizational changes were analyzed with structural equation modeling. Findings showed that the degree to which changes influence employees' daily work was linked to reducing demands and exhaustion, whereas employee willingness to change was linked to seeking resources and seeking challenges. Furthermore, while seeking resources and seeking challenges were associated with high task performance and low exhaustion respectively, reducing demands seemed to predict exhaustion positively. Our findings suggest that job crafting can act as a strategy of employees to respond to organizational change. While seeking resources and seeking challenges enhance employee adjustment and should be encouraged by managers, reducing demands seems to have unfavorable implications for employees. (c) 2015 APA, all rights reserved).

Selling an Energy Efficiency Loan Portfolio in Oregon: Resale of the Craft3 loan portfolio to Self-Help Credit Union

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

Thompson, Peter; Borgeson, Merrian; Kramer, Chris

Under the Clean Energy Works (CEW) program, Craft3 developed a loan product that widened access to financing for homeowners, offered long term funding, and collected repayments through the customer?s utility bill. The program?s success led Craft3 to pursue the sale of the loan portfolio to both mitigate its own risks and replenish funds for lending. This sale breaks new ground for energy efficiency finance and is notable as it was completed even with many novel program design elements. It replenished Craft3?s program capital and uncovered some valuable lessons that may facilitate future transactions. However, the lack of data history andmore » the unproven nature of the loan portfolio meant that Craft3 had to limit the risk of losses to Self-Help, the purchaser of the portfolio. It remains to be seen whether this experience will pave the way for more sales of on-bill energy efficiency loan portfolios. This case study illustrates how certain program design decisions can sometimes both facilitate programmatic objectives and possibly present challenges for the sale of a portfolio of energy efficiency loans.« less

Quasiparticle interference in unconventional 2D systems.

PubMed

Chen, Lan; Cheng, Peng; Wu, Kehui

2017-03-15

At present, research of 2D systems mainly focuses on two kinds of materials: graphene-like materials and transition-metal dichalcogenides (TMDs). Both of them host unconventional 2D electronic properties: pseudospin and the associated chirality of electrons in graphene-like materials, and spin-valley-coupled electronic structures in the TMDs. These exotic electronic properties have attracted tremendous interest for possible applications in nanodevices in the future. Investigation on the quasiparticle interference (QPI) in 2D systems is an effective way to uncover these properties. In this review, we will begin with a brief introduction to 2D systems, including their atomic structures and electronic bands. Then, we will discuss the formation of Friedel oscillation due to QPI in constant energy contours of electron bands, and show the basic concept of Fourier-transform scanning tunneling microscopy/spectroscopy (FT-STM/STS), which can resolve Friedel oscillation patterns in real space and consequently obtain the QPI patterns in reciprocal space. In the next two parts, we will summarize some pivotal results in the investigation of QPI in graphene and silicene, in which systems the low-energy quasiparticles are described by the massless Dirac equation. The FT-STM experiments show there are two different interference channels (intervalley and intravalley scattering) and backscattering suppression, which associate with the Dirac cones and the chirality of quasiparticles. The monolayer and bilayer graphene on different substrates (SiC and metal surfaces), and the monolayer and multilayer silicene on a Ag(1 1 1) surface will be addressed. The fifth part will introduce the FT-STM research on QPI in TMDs (monolayer and bilayer of WSe 2 ), which allow us to infer the spin texture of both conduction and valence bands, and present spin-valley coupling by tracking allowed and forbidden scattering channels.

Artesanias Mexico - Americanas. Programa Piloto de Entrenamiento Para El Asociado Bilingue y Bicultural En El Desarrollo del Nino: Guia XIII [Arts and Crafts of Mexico and the Americas. Pilot Program for the Training of Bilingual and Bicultural Teachers for the Cognitive Development of the Child: Guide XIII].

ERIC Educational Resources Information Center

de Celis, Margarita

This Child Development Associate (CDA) training module, the thirteenth in a series of 16, provides creative experiences with arts and crafts for young children. Designed for preschool teachers and paraprofessional trainees, the Spanish text offers a variety of craft activities. A list of materials necessary, step-by-step directions and…

Portability scenarios for intelligent robotic control agent software

NASA Astrophysics Data System (ADS)

Straub, Jeremy

2014-06-01

Portability scenarios are critical in ensuring that a piece of AI control software will run effectively across the collection of craft that it is required to control. This paper presents scenarios for control software that is designed to control multiple craft with heterogeneous movement and functional characteristics. For each prospective target-craft type, its capabilities, mission function, location, communications capabilities and power profile are presented and performance characteristics are reviewed. This work will inform future work related to decision making related to software capabilities, hardware control capabilities and processing requirements.

Control design for future agile fighters

NASA Technical Reports Server (NTRS)

Murphy, Patrick C.; Davidson, John B.

1991-01-01

The CRAFT control design methodology is presented. CRAFT stands for the design objectives addressed, namely, Control power, Robustness, Agility, and Flying Qualities Tradeoffs. The approach combines eigenspace assignment, which allows for direct specification of eigenvalues and eigenvectors, and a graphical approach for representing control design metrics that captures numerous design goals in one composite illustration. The methodology makes use of control design metrics from four design objective areas, namely, control power, robustness, agility, and flying qualities. An example of the CRAFT methodology as well as associated design issues are presented.

Comparison of hand-craft feature based SVM and CNN based deep learning framework for automatic polyp classification.

PubMed

Younghak Shin; Balasingham, Ilangko

2017-07-01

Colonoscopy is a standard method for screening polyps by highly trained physicians. Miss-detected polyps in colonoscopy are potential risk factor for colorectal cancer. In this study, we investigate an automatic polyp classification framework. We aim to compare two different approaches named hand-craft feature method and convolutional neural network (CNN) based deep learning method. Combined shape and color features are used for hand craft feature extraction and support vector machine (SVM) method is adopted for classification. For CNN approach, three convolution and pooling based deep learning framework is used for classification purpose. The proposed framework is evaluated using three public polyp databases. From the experimental results, we have shown that the CNN based deep learning framework shows better classification performance than the hand-craft feature based methods. It achieves over 90% of classification accuracy, sensitivity, specificity and precision.

The Burden of Craft in Arthroscopic Rotator Cuff Repair: Where Have We Been and Where We Are Going.

PubMed

Burkhart, Stephen S

2015-08-01

The rather turbulent history of arthroscopic rotator cuff repair went through stages of innovation, conflict, disruption, assimilation, and transformation that might be anticipated when a new and advanced technology (arthroscopic cuff repair) displaces an entrenched but outdated discipline (open cuff repair). The transition from open to arthroscopic rotator cuff repair has been a major paradigm shift that has greatly benefited patients. However, this technical evolution/revolution has also imposed a higher "burden of craft" on the practitioners of arthroscopic rotator cuff repair. Technological advancements in surgery demand that surgeons accept this burden of craft and master the advanced technology for the benefit of their patients. This article outlines the author's involvement in the development of arthroscopic rotator cuff repair, and it also explores the surgeon's obligation to accept the burden of craft that is imposed by this discipline.

Skilled craftswomen or cheap labour? Craft-based NGO projects as an alternative to female urban migration in northern Thailand.

PubMed

Humphreys, R

1999-07-01

This article presents a craft-based nongovernmental organization (NGO) project designed as an alternative to female urban migration in northern Thailand. ThaiCraft works with over 60 community-based artisan groups including members of minority and refugee groups. Activities include supporting community groups in their move toward self-reliance, coordination of producers' activities for ensuring fair payment, and maximizing marketing opportunities to increase producers' income. One of the project¿s aims is to form dynamic educational partnerships among producers, volunteers, and the public through the provision of training. Still, it is doubtful whether craft-based NGOs and other organizations can constitute a viable long-term alternative to urban migration. No proposed solution can respond to all issues associated with the emigration of rural Thai women for employment; however, the recognition of women's skills and knowledge is of importance to the fight against gender inequality in development.

RCT of a Promising Vocational/Employment Program for High-Risk Juvenile Offenders

PubMed Central

Schaeffer, Cindy M.; Henggeler, Scott W.; Ford, Julian D.; Mann, Marc; Chang, Rocio; Chapman, Jason E.

2013-01-01

Juvenile offenders with substance use problems are at high risk for deleterious long-term outcomes. This study evaluated the capacity of a promising vocational and employment training program in the building sector (i.e., Community Restitution Apprenticeship-Focused Training, CRAFT) to mitigate such outcomes through enhanced employment and education. Participants were 97 high-risk juvenile offenders (mean age = 15.8 years) randomized to CRAFT versus education as usual (EAU) intervention conditions. Multi-method procedures measured employment, education, substance use, mental health, and criminal outcomes through a 30-month post-baseline follow-up. CRAFT was significantly more effective than EAU at increasing rates of youth employment and GED attendance. Intervention effects were not observed, however, for months employed, hours worked, or hourly wage. Measures of youth substance use, mental health symptoms, and criminal activity showed no favorable or iatrogenic effects. The potential of CRAFT was modestly supported, and suggestions were made for future research. PMID:23958035

46 CFR 117.207 - Survival craft-vessels operating on lakes, bays, and sounds routes.

Code of Federal Regulations, 2010 CFR

2010-10-01

... survival craft. (e) For a vessel certificated to operate on a lakes, bays, and sounds route in shallow water where the vessel can not sink deep enough to submerge the topmost passenger deck or where...

Sharing Craft Knowledge: The Soul of Principal Peer Assessment.

ERIC Educational Resources Information Center

Abbott, James E.

1996-01-01

Describes the implementation of a peer assessment process for school principals using a New Skills Profile of essential craft skills: teaching methods, budgetary competence, networking, technological literacy, communication, leadership, conflict resolution, diversity, systems thinking, and Total Quality Management principles. Participating…

Above the cloud computing orbital services distributed data model

NASA Astrophysics Data System (ADS)

Straub, Jeremy

2014-05-01

Technology miniaturization and system architecture advancements have created an opportunity to significantly lower the cost of many types of space missions by sharing capabilities between multiple spacecraft. Historically, most spacecraft have been atomic entities that (aside from their communications with and tasking by ground controllers) operate in isolation. Several notable example exist; however, these are purpose-designed systems that collaborate to perform a single goal. The above the cloud computing (ATCC) concept aims to create ad-hoc collaboration between service provider and consumer craft. Consumer craft can procure processing, data transmission, storage, imaging and other capabilities from provider craft. Because of onboard storage limitations, communications link capability limitations and limited windows of communication, data relevant to or required for various operations may span multiple craft. This paper presents a model for the identification, storage and accessing of this data. This model includes appropriate identification features for this highly distributed environment. It also deals with business model constraints such as data ownership, retention and the rights of the storing craft to access, resell, transmit or discard the data in its possession. The model ensures data integrity and confidentiality (to the extent applicable to a given data item), deals with unique constraints of the orbital environment and tags data with business model (contractual) obligation data.

The development and validation of a job crafting measure for use with blue-collar workers

PubMed Central

Nielsen, Karina; Abildgaard, Johan Simonsen

2012-01-01

Job crafting describes a set of proactive behaviours in which employees may engage to shape their work in order to minimize hindering job demands and maximize resources and challenging demands. Such behaviours may be particularly important among blue-collar workers whose jobs are characterized by poor working conditions and low well-being. We present the development and adaptation of a job crafting measure that may be used among blue-collar workers, based on an existing scale by Tims, Bakker, and Derks (2012) that was not specifically developed for blue-collar workers. We test the validity and reliability of the measure in a longitudinal study based on multiple source information from mail delivery workers in Denmark (N = 362 at Time 1; N = 408 at Time 2). Results indicate the presence of five job crafting dimensions: increasing challenging demands, decreasing social job demands, increasing social job resources, increasing quantitative demands and decreasing hindering job demands. These can be reliably measured with 15 items. The measure shows acceptable discriminant and criterion validity, and test-retest reliability. The findings extend the application of the original questionnaire. They also add to knowledge of the job crafting behaviours in which blue-collar workers engage and link them to well-being outcomes. PMID:23236220

Numerical simulation of water evaporation inside vertical circular tubes

NASA Astrophysics Data System (ADS)

Ocłoń, Paweł; Nowak, Marzena; Majewski, Karol

2013-10-01

In this paper the results of simplified numerical analysis of water evaporation in vertical circular tubes are presented. The heat transfer in fluid domain (water or wet steam) and solid domain (tube wall) is analyzed. For the fluid domain the temperature field is calculated solving energy equation using the Control Volume Method and for the solid domain using the Finite Element Method. The heat transfer between fluid and solid domains is conjugated using the value of heat transfer coefficient from evaporating liquid to the tube wall. It is determined using the analytical Steiner-Taborek correlation. The pressure changes in fluid are computed using Friedel model.

Scanning-tunneling microscope imaging of single-electron solitons in a material with incommensurate charge-density waves.

PubMed

Brazovskii, Serguei; Brun, Christophe; Wang, Zhao-Zhong; Monceau, Pierre

2012-03-02

We report on scanning-tunneling microscopy experiments in a charge-density wave (CDW) system allowing visually capturing and studying in detail the individual solitons corresponding to the self-trapping of just one electron. This "Amplitude Soliton" is marked by vanishing of the CDW amplitude and by the π shift of its phase. It might be the realization of the spinon--the long-sought particle (along with the holon) in the study of science of strongly correlated electronic systems. As a distinct feature we also observe one-dimensional Friedel oscillations superimposed on the CDW which develop independently of solitons.

Thermal Smearing of the Magneto-Kohn Anomaly for Dirac materials and comparison with the Two-dimensional electron Liquid

NASA Astrophysics Data System (ADS)

Dahal, Dipendra; Balassis, Antonios; Gumbs, Godfrey; Glasser, M. L.; graphene projects Collaboration

We compute and compare the effects due to a uniform perpendicular magnetic field and the temperature on the static polarization functions for monolayer graphene (MLG) associated with the Dirac point with that for the two-dimensional electron liquid (2DEL). Previous results for the 2DEL are discussed and we point out a flaw in reported analytic derivation to exhibit the smearing of the Fermi surface for 2DEL. The relevance of our study to the Kohn anomaly in low-dimensional structures and the Friedel oscillations for the screening of the potential for a dilute distribution of impurities is reported.

Thermal smearing and screening in a strong magnetic field for Dirac materials in comparison with the two dimensional electron liquid

NASA Astrophysics Data System (ADS)

Gumbs, Godfrey; Balassis, Antonios; Dahal, Dipendra; Lawrence Glasser, M.

2016-10-01

We compute and compare the effects due to a uniform perpendicular magnetic field as well as temperature on the static polarization functions for monolayer graphene (MLG), associated with the Dirac point, with that for the two-dimensional electron liquid (2DEL) with the use of comprehensive numerical calculations. The relevance of our study to the Friedel oscillations for the screening of the potential for a dilute distribution of impurities is reported too. Our results show substantial differences due to screening for the 2DEL and MLG which have not been given adequate attention previously.

Measurement of scour-depth near bridge piers

USGS Publications Warehouse

Skinner, J.V.

1986-01-01

Because a free-running craft will be undesirably heavy and large, other methods of obtaining scour data are proposed. A tethered craft fitted with a controllable rudder and some methods of measuring scour at a point are presented for future study and development.

Russian Cargo Craft Launches for Journey to International Space Station

NASA Image and Video Library

2017-10-14

The unpiloted Russian ISS Progress 68 cargo craft launched to the International Space Station Oct. 14 from the Baikonur Cosmodrome in Kazakhstan. The Progress carried almost three tons of food, fuel and supplies for the Expedition 53 crew on the station.

ePerformance: Crafting, Rehearsing, and Presenting the ePortfolio Persona

ERIC Educational Resources Information Center

Ramírez, Kimberly

2011-01-01

"ePerformance: Crafting, Rehearsing, and Presenting the ePortfolio Persona" exposes vital intersections between pedagogy and performance to reveal how using ePortfolio encourages not only student-centered learning, but facilitates collaboration through cooperative exchanges. Productive interactivity with audiences who actively influence…

Arctic Craft Demonstration Report

DTIC Science & Technology

2012-11-01

equivalent to a domestic lifeboat.” Figure 1. ARKTOS evacuation craft drawing. The ARKTOS consists of a permanently linked pair of laminated e...glass/ Kevlar -hybrid hulls. On land motive power is provided by a track system, and water jets for propulsion in the water. Each hull is independently

75 FR 50773 - Invocation of Sunken Military Craft Act

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-17

... approximately 2450 ft of water near position: 32-58.0 N 118-10.10 W. This location now serves as the gravesite... under the Sunken Military Craft Act (10 U.S.C. 113 note; Pub. L. 108-375, Sections 1401-1408) (``the Act...

46 CFR 199.180 - Training and drills.

Code of Federal Regulations, 2014 CFR

2014-10-01

... survival craft engine and accessories; (xiii) The recovery of survival craft and rescue boats, including... and operating the lifeboat engine; and (vii) Operating davits used for launching the liferafts. (2) Abandon-ship drills should also include conducting a mock search and rescue of passengers or special...

46 CFR 199.180 - Training and drills.

Code of Federal Regulations, 2012 CFR

2012-10-01

... survival craft engine and accessories; (xiii) The recovery of survival craft and rescue boats, including... and operating the lifeboat engine; and (vii) Operating davits used for launching the liferafts. (2) Abandon-ship drills should also include conducting a mock search and rescue of passengers or special...

46 CFR 199.180 - Training and drills.

Code of Federal Regulations, 2013 CFR

2013-10-01

... survival craft engine and accessories; (xiii) The recovery of survival craft and rescue boats, including... and operating the lifeboat engine; and (vii) Operating davits used for launching the liferafts. (2) Abandon-ship drills should also include conducting a mock search and rescue of passengers or special...

Rationalizing Cooperation: Moroccan Craft, Politics, and Education

ERIC Educational Resources Information Center

Nicholas, Claire

2018-01-01

State attempts to rationalize Moroccan craft education reflect the ambivalent status of traditional knowledge in a modern economy. Female artisans, recently organized as a cooperative, navigate this ambivalence in a weaving "theory" class and in their "occupation" of the cooperative structure itself. During performances of…

46 CFR 199.180 - Training and drills.

Code of Federal Regulations, 2010 CFR

2010-10-01

... survival craft engine and accessories; (xiii) The recovery of survival craft and rescue boats, including... and operating the lifeboat engine; and (vii) Operating davits used for launching the liferafts. (2) Abandon-ship drills should also include conducting a mock search and rescue of passengers or special...

46 CFR 199.180 - Training and drills.

Code of Federal Regulations, 2011 CFR

2011-10-01

... survival craft engine and accessories; (xiii) The recovery of survival craft and rescue boats, including... and operating the lifeboat engine; and (vii) Operating davits used for launching the liferafts. (2) Abandon-ship drills should also include conducting a mock search and rescue of passengers or special...

46 CFR 11.321 - Requirements to qualify for an STCW endorsement as officer in charge of a navigational watch...

Code of Federal Regulations, 2014 CFR

2014-10-01

... subpart. (iii) Proficiency in survival craft and rescue boats other than fast rescue boats (PSC) or proficiency in survival craft and rescue boats other than lifeboats and fast rescue boats (PSC-limited). (iv...

Computational analysis of aerodynamic characteristics for wing in ground effect craft in lateral stability

NASA Astrophysics Data System (ADS)

Amir, M. A. U.; Maimun, A.; Mat, S.; Saad, M. R.

2016-10-01

Wing in-ground effect (WIG) crafts are becoming promising transportation over the last decade. However, stability and control problems faced by the WIG in earlier development are still unresolved. This paper objectively investigates the lateral stability of wing in ground effect craft. The wing encompasses a winglet at the end of the wingtip. Lift, drag and pressure were measured with the respect of the heeling angle of 100, 150 and 200, respectively, with the h/c of 0.3. Initial results from the computational studies show that the ground effect pressure distributions provide a natural righting moment when the WIG craft heels near ground. This initial result provides an insight to understand the current state of knowledge of stability for WIG, particularly on transverse or lateral stability of WIG where it plays important roles in the safety aspect. It is crucial to understand the stability and its component in order to avoid any unforeseen accident. This paper discusses the results obtained from the numerical studies.

Brane Craft

NASA Technical Reports Server (NTRS)

Janson, Siegfried

2017-01-01

A Brane Craft is a membrane spacecraft with solar cells, command and control electronics, communications systems, antennas, propulsion systems, attitude and proximity sensors, and shape control actuators as thin film structures manufactured on 10 micron thick plastic sheets. This revolutionary spacecraft design can have a thickness of tens of microns with a surface area of square meters to maximize area-to-mass ratios for exceptionally low-mass spacecraft. Communications satellites, solar power satellites, solar electric propulsion stages, and solar sails can benefit from Brane Craft design. It also enables new missions that require low-mass spacecraft with exceptionally high delta-V. Active removal of orbital debris from Earth orbit is the target application for this study.

Human-computer interface

DOEpatents

Anderson, Thomas G.

2004-12-21

The present invention provides a method of human-computer interfacing. Force feedback allows intuitive navigation and control near a boundary between regions in a computer-represented space. For example, the method allows a user to interact with a virtual craft, then push through the windshield of the craft to interact with the virtual world surrounding the craft. As another example, the method allows a user to feel transitions between different control domains of a computer representation of a space. The method can provide for force feedback that increases as a user's locus of interaction moves near a boundary, then perceptibly changes (e.g., abruptly drops or changes direction) when the boundary is traversed.

Transformation Craft (T-Craft) Concept Study

DTIC Science & Technology

2007-08-01

turbines (General Electric LM1600, each at 14MW) 3 high temperature superconductor electric generators 2 permanent magnet motors 2 shafts (pumpjets...pump-jet propulsor and permanent magnet motors at the far aft of the ship, the gas turbine generator sets were moved quite far forward (to directly

Science and Sanity in Special Education.

ERIC Educational Resources Information Center

Dammann, James E.; Vaughn, Sharon

2001-01-01

This article describes the usefulness of a scientific approach to improving knowledge and practice in special education. Of four approaches to knowledge (superstition, folklore, craft, and science), craft and science are supported and implications for special education drawn including the need to bridge the gulf between research knowledge and…

Story Telling: Crafting Identities

ERIC Educational Resources Information Center

McMahon, Mary; Watson, Mark

2013-01-01

Career guidance clients are seeking to craft new identities that better position them in their careers. The focus of the present article is on narrative career counselling's potential contribution in providing a meaningful and useful experience for career guidance clients. To illustrate the potential of narrative career counselling, the story…

25 CFR 307.2 - Certificates of genuineness; by whom affixed.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 2 2010-04-01 2010-04-01 false Certificates of genuineness; by whom affixed. 307.2 Section 307.2 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO ALL-WOOL WOVEN... license issued by the Indian Arts and Crafts Board. ...

25 CFR 304.2 - Marking and ownership of dies.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 2 2010-04-01 2010-04-01 false Marking and ownership of dies. 304.2 Section 304.2 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO, PUEBLO, AND HOPI SILVER, USE OF... owned by the Indian Arts and Crafts Board. ...

Reading the Writer's Craft: The Hemingway Short Stories

ERIC Educational Resources Information Center

Garrigues, Lisa

2004-01-01

The high school students who spent five weeks studying the style and craft of Ernest Hemingway experienced the power and plus points of apprenticeships. Several assignments that helped the high school juniors to analyze Hemingway's work on short stories and learn from this master craftsman are presented.

33 CFR 146.120 - Manning of survival craft.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Manning of survival craft. 146.120 Section 146.120 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES OPERATIONS Manned OCS Facilities § 146.120 Manning of survival...

33 CFR 146.120 - Manning of survival craft.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Manning of survival craft. 146.120 Section 146.120 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES OPERATIONS Manned OCS Facilities § 146.120 Manning of survival...

33 CFR 146.120 - Manning of survival craft.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Manning of survival craft. 146.120 Section 146.120 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES OPERATIONS Manned OCS Facilities § 146.120 Manning of survival...

33 CFR 146.120 - Manning of survival craft.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Manning of survival craft. 146.120 Section 146.120 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES OPERATIONS Manned OCS Facilities § 146.120 Manning of survival...

Historic Crafts and Skills. Instructor Manual. Historic Skills Series.

ERIC Educational Resources Information Center

Cooper, Jim

Designed for classroom teachers and youth leaders, this self-contained manual contains classroom tested background information, lesson plans, activities, class exercises, tests, suggested visual aids, and references for teaching basic historic crafts and skills to junior high and senior high school students. An introductory section briefly…

46 CFR 11.317 - Requirements to qualify for an STCW endorsement as master of vessels of less than 500 GT limited...

Code of Federal Regulations, 2014 CFR

2014-10-01

... of this subpart. (iii) Proficiency in survival craft and rescue boats other than fast rescue boats (PSC) or proficiency in survival craft and rescue boats other than lifeboats and fast rescue boats (PSC...

Practical Shipbuilding Standards for Surface Preparation and Coatings

DTIC Science & Technology

1979-07-01

strong solvent and apply over last coat of epoxy within 48 hours. *Minimum Dry Film Thickness 12.0 SAFETY AND POLUTION CONTROL 12.5 Safety solvents shall...Owner Inspec ion (3) QA/QC Dept. Inspectors. (4) Craft Inspectors (5) Craft Supervision Inspection Only (6) QA/QC Dept. Audit Only (7) Are

Crafting an Occupational Identity: Learning the Precepts of Craftsmanship through Apprenticeship

ERIC Educational Resources Information Center

Chan, Selena

2014-01-01

The term craftsmanship is associated with pre-industrial craft work with inferences to skilled artisanal manufacture of bespoke products. Apprenticeship learning is often perceived to be synonymous with learning craftsmanship. How then is the trait of craftsmanship through attainment of specific artisanal approaches conveyed and learnt through…

46 CFR 108.550 - Survival craft launching and recovery arrangements: General.

Code of Federal Regulations, 2013 CFR

2013-10-01

...-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.550 Survival craft...) A launching appliance approved on or before November 10, 2011 under approval series 160.163. (b) All... being launched with their full complement of persons and equipment within 10 minutes from the time the...

Advanced Concepts in Structuring and Utilizing Local Advisory Councils and Craft Committees.

ERIC Educational Resources Information Center

Carroll, Richard E.

Adoption and implementation of advanced concepts in structuring and using a local advisory council and craft committees can result in significantly improved vocational education programs. The organizational structure of a vocational-technical school advisory council should be a vehicle that facilitates accomplishment of its prime function--to…

Creative Arts and Crafts for Children with Visual Handicaps.

ERIC Educational Resources Information Center

Sykes, Kim C.; And Others

This teaching guide gives instructions for 23 creative art or craft projects thought to be appropriate for use with visually handicapped children. Usually included for each project are the educational objective, materials and equipment needed, procedure, possible variations, and photographs. The following types of activity are recommended: tempera…

Declining Student Enrollment: A Case Study Exploring How Three Suburban School Districts Crafted Coherence

ERIC Educational Resources Information Center

Dimmitt, Eric J.

2012-01-01

This qualitative multi-site case study's purpose was to prove that the crafting coherence process was evident when three suburban Midwestern school districts implemented schools' goals while experiencing reductions in instructional programming, staffing, and facilities resources along with school closings due to significant declining student…

Space Craft

ERIC Educational Resources Information Center

Demski, Jennifer

2009-01-01

This article discusses how craft innovative architecture is bringing form to the function of 21st-century learning. It describes the construction of New Tech High at Coppell, in Coppell, Texas, which produces an example of how workplace design principles can be coordinated with modern educational goals. The campus was built on the model of New…

Exploring Visual Arts and Crafts Careers. A Student Guidebook.

ERIC Educational Resources Information Center

Dubman, Shelia; And Others

One of six student guidebooks in a series of 11 arts and humanities career exploration guides for grade 7-12 teachers, counselors, and students, this student book on exploration of visual arts and crafts careers presents information on specific occupations in seven different career areas: Visual communications, product design, environmental…

46 CFR 108.530 - Stowage of survival craft.

Code of Federal Regulations, 2013 CFR

2013-10-01

... craft required to be served by a launching appliance or marine evacuation system must be stowed as.... (5) Each rigid container for an inflatable liferaft to be launched by a launching appliance must be... arranged for float-free launching. The arrangement must ensure that the liferaft or liferafts when released...

Industrial Crafts. A Bilingual Text = Trabajos Manuales Industriales. Un Texto Bilingue.

ERIC Educational Resources Information Center

Los Angeles Unified School District, CA. Div. of Career and Continuing Education.

This bilingual instructional text, one in a series of six texts covering various vocational and technical topics, provides secondary level English and Spanish instruction in industrial crafts. Addressed in the individual units are the following topics: plastics; laminating acrylic plastic; thermoforming plastics; sawing, shaping, and finishing…

25 CFR 308.1 - Penalties.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 2 2010-04-01 2010-04-01 false Penalties. 308.1 Section 308.1 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR REGULATIONS FOR USE OF CERTIFICATES OF THE INDIAN ARTS AND CRAFTS BOARD TO BE ATTACHED TO THEIR TRADE-MARKS BY INDIAN ENTERPRISES CONCERNED WITH THE PRODUCTION AND...

25 CFR 307.13 - Licensee's responsibility.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 2 2010-04-01 2010-04-01 false Licensee's responsibility. 307.13 Section 307.13 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO ALL-WOOL WOVEN FABRICS; USE OF GOVERNMENT... and records of the allocation of such certificates will be maintained by the Indian Arts and Crafts...

25 CFR 307.11 - Certificates fastened to fabrics.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 2 2010-04-01 2010-04-01 false Certificates fastened to fabrics. 307.11 Section 307.11 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO ALL-WOOL WOVEN FABRICS; USE OF... the hand seal press furnished by the Indian Arts and Crafts Board. ...

25 CFR 304.4 - Standards and additional requirements.

Code of Federal Regulations, 2010 CFR

2010-04-01

... 25 Indians 2 2010-04-01 2010-04-01 false Standards and additional requirements. 304.4 Section 304.4 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO, PUEBLO, AND HOPI SILVER... in compliance with the standards set forth by the Indian Arts and Crafts Board, shall bear the...

Ten Questions about the Future of Art and Design Education.

ERIC Educational Resources Information Center

Steers, John

1997-01-01

Asks ten questions about the future of art, crafts, and design education. Focuses on why art, crafts, and design education should be included in the curriculum; how the curriculum should be defined; and how art educators should respond to conflicting calls for cultural relativism and for cultural nationalism. (DSK)

Regional Training Demonstration Project. Final Evaluation Report.

ERIC Educational Resources Information Center

Drewes, Donald W.

A third-party evaluation was conducted of the International Masonry Institute's Regional Training System. Data were collected from the following sources: the enrollment database; surveys of 244 participants (68 prejob apprentices, 8 early leavers, 48 completers, 35 journeyworkers, 23 business agents, 23 craft instructors, 20 cross-craft, and 19…

78 FR 34377 - Trichloroethylene TSCA Chemical Risk Assessment; Notice of Public Meetings and Opportunity to...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-07

... ENVIRONMENTAL PROTECTION AGENCY [EPA-HQ-OPPT-2012-0723; FRL-9389-1] Trichloroethylene TSCA... Trichloroethylene: Degreaser and Arts/Crafts Uses.'' EPA will hold three peer review meetings by web connect and... Risk Assessment for Trichloroethylene: Degreaser and Arts/Crafts Uses.'' Trichloroethylene (TCE) (CASRN...

Hungarian Folk Arts and Crafts. Educational Curriculum Kit 6.

ERIC Educational Resources Information Center

Boros-Kazai, Andrew

This booklet provides a brief introduction to Hungarian arts and crafts. A discussion of the historical development and characteristics of Hungarian folk art supplies the background for a section in which regional styles of Hungarian folk art are described (Transdanubia, the Highlands of northern Hungary, Transylvania, and the Great Hungarian…

33 CFR 110.5 - Casco Bay, Maine.

Code of Federal Regulations, 2010 CFR

2010-07-01

... by yachts and other recreational craft. Fore and aft moorings will be allowed. Temporary floats or... this section is reserved for yachts and other small recreational craft. Fore and aft moorings will be... feet wide, the center line of which follows the natural channel. Note: This area is reserved for yachts...

33 CFR 110.5 - Casco Bay, Maine.

Code of Federal Regulations, 2011 CFR

2011-07-01

... by yachts and other recreational craft. Fore and aft moorings will be allowed. Temporary floats or... this section is reserved for yachts and other small recreational craft. Fore and aft moorings will be... feet wide, the center line of which follows the natural channel. Note: This area is reserved for yachts...

36 CFR 292.45 - Use of motorized and non-motorized rivercraft.

Code of Federal Regulations, 2010 CFR

2010-07-01

... practicable, conflicts between motorized and non-motorized rivercraft users and between both types of...-motorized rivercraft may be permitted subject to restrictions on size, type of craft, numbers, duration... Service where such activity may be permitted subject to restrictions on size, type of craft, numbers...

Arts and Cultural Education at School in Europe: Austria 2007/08

ERIC Educational Resources Information Center

Wimmer, Michael; Schad, Anke; Nagel, Tanja

2008-01-01

This paper focuses on Austria's arts and cultural education. The Austrian arts curriculum is organised as separate subjects. It includes music, visual arts and crafts (divided into two separate subjects: technical crafts and textile arts). The Austrian curriculum refers to "Bildungs- und Lehraufgaben", i.e. educational and teaching…

76 FR 35462 - Proposed Renewal of Information Collection; Source Directory of American Indian and Alaska Native...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-06-17

... Native artists and craftspeople, cooperatives, tribal arts and crafts enterprises, businesses privately... enterprise, or nonprofit organization. operated business. Copy of the business owner's tribal To determine...; Source Directory of American Indian and Alaska Native Owned and Operated Arts and Crafts Businesses...

Forum: Crafting the Introductory Course in Religious Studies

ERIC Educational Resources Information Center

McCutcheon, Russell T.; Hollander, Aaron T.; Durdin, Andrew F.; Gardner, Kelli A.; Miller, Adam T.; Crews, Emily D.

2016-01-01

This series of short essays considers the complex choices and decision-making processes of instructors preparing to teach, and continuing to teach, introductory courses in religious studies. In a paper originally presented in the University of Chicago's "The Craft of Teaching in the Academic Study of Religion" series, Russell McCutcheon…

Secondary School Design: Workshop Crafts.

ERIC Educational Resources Information Center

Department of Education and Science, London (England).

Design features are described for school shop facilities. Some general requirements common to most workshops are discussed; and specific design information is provided for general woodwork, general metalwork, and combined wood and metalwork facilities. The grouping of the workshop crafts and their relation to other parts of the school are also…

Fractional Wigner Crystal in the Helical Luttinger Liquid.

PubMed

Traverso Ziani, N; Crépin, F; Trauzettel, B

2015-11-13

The properties of the strongly interacting edge states of two dimensional topological insulators in the presence of two-particle backscattering are investigated. We find an anomalous behavior of the density-density correlation functions, which show oscillations that are neither of Friedel nor of Wigner type: they, instead, represent a Wigner crystal of fermions of fractional charge e/2, with e the electron charge. By studying the Fermi operator, we demonstrate that the state characterized by such fractional oscillations still bears the signatures of spin-momentum locking. Finally, we compare the spin-spin correlation functions and the density-density correlation functions to argue that the fractional Wigner crystal is characterized by a nontrivial spin texture.

The Power of Poincaré: Elucidating the Hidden Symmetries in Focal Conic Domains

NASA Astrophysics Data System (ADS)

Matsumoto, Elisabetta A.; Alexander, Gareth P.; Chen, Bryan Gin-Ge; Kamien, Randall D.

2011-03-01

Focal conic domains are typically the ``smoking gun'' by which smectic liquid crystalline phases are identified. The geometry of the equally spaced smectic layers is highly generic but, at the same time, difficult to work with. We develop an approach to the study of focal sets in smectics which exploits a hidden Poincaré symmetry revealed only by viewing the smectic layers as projections from one-higher dimension. We use this perspective to shed light upon the concentric cyclides of Dupin and several classic focal conic textures which exhibit a more widespread level of geometric organization as in Friedel's law of corresponding cones, the networks and trellises expounded by Bouligand, or Apollonian packings.

The Art and Craft of Science

ERIC Educational Resources Information Center

Root-Bernstein, Robert; Root-Bernstein, Michele

2013-01-01

Walter Alvarez, a doctor and physiologist of some renown, decided to send his scientifically talented son, Luis, to an arts and crafts school where Luis took industrial drawing and woodworking instead of calculus. Luis Alvarez won the Nobel Prize in physics in 1968. Einstein was certainly not a standout in his mathematics and physics classes. Yet…

46 CFR 108.553 - Survival craft launching and recovery arrangements using falls and a winch.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 4 2012-10-01 2012-10-01 false Survival craft launching and recovery arrangements using falls and a winch. 108.553 Section 108.553 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.553 Survival...

46 CFR 108.553 - Survival craft launching and recovery arrangements using falls and a winch.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 46 Shipping 4 2014-10-01 2014-10-01 false Survival craft launching and recovery arrangements using falls and a winch. 108.553 Section 108.553 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) A-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.553 Survival...

46 CFR 108.540 - Survival craft muster and embarkation arrangements.

Code of Federal Regulations, 2013 CFR

2013-10-01

... OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.540 Survival craft muster and... minutes from the time the instruction to board is given. (e) Each davit-launched and free-fall survival... ladder as follows: (1) Each embarkation ladder must be approved under approval series 160.117 or be a...

46 CFR 108.550 - Survival craft launching and recovery arrangements: General.

Code of Federal Regulations, 2011 CFR

2011-10-01

... must be designed, based on the ultimate strength of the construction material, to be at least 4.5 times...-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.550 Survival craft... approved under approval series 160.132, with a winch approved under approval series 160.115. Each launching...

46 CFR 108.550 - Survival craft launching and recovery arrangements: General.

Code of Federal Regulations, 2010 CFR

2010-10-01

... must be designed, based on the ultimate strength of the construction material, to be at least 4.5 times...-MOBILE OFFSHORE DRILLING UNITS DESIGN AND EQUIPMENT Lifesaving Equipment § 108.550 Survival craft... approved under approval series 160.132, with a winch approved under approval series 160.115. Each launching...

Guidelines for the Administration and Accreditation of the Standardized Craft Training Process. Sixth Edition.

ERIC Educational Resources Information Center

National Center for Construction Education and Research, Gainesville, FL.

This document contains guidelines for the administration and accreditation of the standardized craft training process that was developed by the National Center for Construction Education and Research (NCCER) in partnership with various sectors of the construction and maintenance industries. The following are among the topics discussed in Chapters…

Teaching Writing: Craft, Art, Genre

ERIC Educational Resources Information Center

Claggett, Fran

2005-01-01

In today's educational climate, it is more important than ever that teachers prepare their students to be effective and competent writers who can write for a variety of purposes. How can teachers teach their students the skills they need to be successful while also fostering an appreciation for the process, craft, and art of writing? Drawing from…

46 CFR 117.175 - Survival craft equipment.

Code of Federal Regulations, 2011 CFR

2011-10-01

...) General. Each item of survival craft equipment must be of good quality, and efficient for the purpose it...: (1) Safety of Life at Sea (SOLAS) B Pack; or (2) SOLAS A Pack. (c) Inflatable buoyant apparatus. Each.... (d) Life floats. Each life float must be fitted with a lifeline, pendants, two paddles, a painter...

46 CFR 117.175 - Survival craft equipment.

Code of Federal Regulations, 2014 CFR

2014-10-01

...) General. Each item of survival craft equipment must be of good quality, and efficient for the purpose it...: (1) Safety of Life at Sea (SOLAS) B Pack; or (2) SOLAS A Pack. (c) Inflatable buoyant apparatus. Each.... (d) Life floats. Each life float must be fitted with a lifeline, pendants, two paddles, a painter...

46 CFR 117.175 - Survival craft equipment.

Code of Federal Regulations, 2012 CFR

2012-10-01

...) General. Each item of survival craft equipment must be of good quality, and efficient for the purpose it...: (1) Safety of Life at Sea (SOLAS) B Pack; or (2) SOLAS A Pack. (c) Inflatable buoyant apparatus. Each.... (d) Life floats. Each life float must be fitted with a lifeline, pendants, two paddles, a painter...

46 CFR 117.175 - Survival craft equipment.

Code of Federal Regulations, 2013 CFR

2013-10-01

...) General. Each item of survival craft equipment must be of good quality, and efficient for the purpose it...: (1) Safety of Life at Sea (SOLAS) B Pack; or (2) SOLAS A Pack. (c) Inflatable buoyant apparatus. Each.... (d) Life floats. Each life float must be fitted with a lifeline, pendants, two paddles, a painter...

46 CFR 117.175 - Survival craft equipment.

Code of Federal Regulations, 2010 CFR

2010-10-01

...) General. Each item of survival craft equipment must be of good quality, and efficient for the purpose it...: (1) Safety of Life at Sea (SOLAS) B Pack; or (2) SOLAS A Pack. (c) Inflatable buoyant apparatus. Each.... (d) Life floats. Each life float must be fitted with a lifeline, pendants, two paddles, a painter...

46 CFR 199.230 - Stowage of survival craft.

Code of Federal Regulations, 2010 CFR

2010-10-01

... vessel of 80 meters (262 feet) in length and upwards must be stowed where the after-end of the lifeboat... height of a survival craft must take into account the vessel's escape provisions, the vessel's size, and... as practicable, not exceed 15 meters (49 feet) to the waterline when the vessel is in its lightest...

46 CFR 199.230 - Stowage of survival craft.

Code of Federal Regulations, 2011 CFR

2011-10-01

... vessel of 80 meters (262 feet) in length and upwards must be stowed where the after-end of the lifeboat... height of a survival craft must take into account the vessel's escape provisions, the vessel's size, and... as practicable, not exceed 15 meters (49 feet) to the waterline when the vessel is in its lightest...

77 FR 31642 - Hawker Beech Craft Defense Company, LLC, Also Known As Hawker Beechcraft Corporation, Also Known...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-05-29

... DEPARTMENT OF LABOR Employment and Training Administration [TA-W-74,901] Hawker Beech Craft Defense Company, LLC, Also Known As Hawker Beechcraft Corporation, Also Known As Hawker Beechcraft International SVC, Also Known As Rapid Surplus Parts, Also Known As Hawker Beechcraft Svcs, Also Known As Travel...

Developing Community Reinforcement and Family Training (CRAFT) for Parents of Treatment-Resistant Adolescents

ERIC Educational Resources Information Center

Kirby, Kimberly C.; Versek, Brian; Kerwin, MaryLouise E.; Meyers, Kathleen; Benishek, Lois A.; Bresani, Elena; Washio, Yukiko; Arria, Amelia; Meyers, Robert J.

2015-01-01

We describe a project focused on training parents to facilitate their treatment-resistant adolescent's treatment entry and to manage their child after entry into community-based treatment. Controlled studies show that Community Reinforcement and Family Training (CRAFT) is a unilateral treatment that fosters treatment entry of adults; however,…

Craft Knowledge: Of Disciplinarity in Writing Studies

ERIC Educational Resources Information Center

Johnson, Robert R.

2010-01-01

This article argues that craft knowledge can provide a disciplinary rationale for writing studies. It draws from the ancient concepts of teche, phronesis, and the four causes of making and makes the case for a definition of disciplinary knowledge fitting for writing studies. The article concludes with a conceptual framework that can serve as a…

Arts and Crafts for Use with Mentally Retarded Students.

ERIC Educational Resources Information Center

Child, Toni, Ed.

GRADES OR AGES: Mentally retarded children of any age. SUBJECT MATTER: Arts and crafts. ORGANIZATION AND PHYSICAL APPEARANCE: The guide is divided into sections according to the material to be used. Section headings are: Paper, Fabrics, Wood, Metal, Nature, Miscellaneous, and Painting. Each section is laid out in three parallel columns, one each…

46 CFR 180.202 - Survival craft-vessels operating on oceans routes.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 46 Shipping 7 2012-10-01 2012-10-01 false Survival craft-vessels operating on oceans routes. 180... § 180.202 Survival craft—vessels operating on oceans routes. (a) Each vessel certificated to operate on an oceans route in cold water must either: (1) Be provided with inflatable buoyant apparatus of an...

46 CFR 117.202 - Survival craft-vessels operating on oceans routes.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 46 Shipping 4 2013-10-01 2013-10-01 false Survival craft-vessels operating on oceans routes. 117... operating on oceans routes. (a) Except as allowed by paragraph (b) of this section, each vessel certificated to operate on an oceans route in cold water must be provided with inflatable liferafts of an...