Log in

Relevant bibliographies by topics / AFRL / Journal articles

To see the other types of publications on this topic, follow the link: AFRL.

Journal articles on the topic 'AFRL'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'AFRL.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Cantey, J. Robert, R. K. Blake, J. R. Williford, and Steve L. Moseley. "Characterization of the Escherichia coliAF/R1 Pilus Operon: Novel Genes Necessary for Transcriptional Regulation and for Pilus-Mediated Adherence." Infection and Immunity 67, no. 5 (May 1, 1999): 2292–98. http://dx.doi.org/10.1128/iai.67.5.2292-2298.1999.

Full text

Abstract:

ABSTRACT We isolated the genetic determinant of AF/R1 pilus production in attaching/effacing Escherichia coli RDEC-1 and identified seven genes required for pilus expression and function. DNA sequence analysis of the structural subunit gene afrA corrected an error in the published sequence and extended homology with the F18 pilus subunit of pig edema E. coli strains. AfrB and AfrC, encoded downstream from AfrA, were required for pilus expression. AfrB was related to the usher protein PefC of Salmonella typhimurium plasmid-encoded fimbriae, and AfrC was related to PefD, a chaperone protein. AfrD and AfrE, encoded downstream from AfrC, were not necessary for the expression of AF/R1 pili but were required for ileal adherence as assayed by ileal brush border aggregation. Thus, the adhesive subunit of the AF/R1 pilus is distinct from the structural subunit, as is the case for Pap pili and type 1 pili. AfrD was related to FedE of the F18 fimbrial operon of the E. coli strain that causes edema disease in pigs. AfrE was a novel protein. AfrR and AfrS are encoded upstream from AfrA, in the opposite orientation. AfrR is related to the AraC family of transcriptional regulators, and AfrR and AfrS interact to function in a novel mode of transcriptional activation of afrA. AF/R1 pili mediate the adherence to Peyer’s patch M cells, ileal mucosa, and colonic mucosa in a rabbit model of diarrhea caused by enteropathogenic E. coli. Our observations will facilitate the further study of the phenomena of M-cell adherence.

APA, Harvard, Vancouver, ISO, and other styles

2

Davis, T. M., and B. J. Tomlinson. "AFRL cryogenic technology development programs." IEEE Aerospace and Electronic Systems Magazine 23, no. 3 (March 2008): 18–27. http://dx.doi.org/10.1109/maes.2008.4476101.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Chong, K. H., A. R. H. Rigit, R. Baini, S. F. Saleh, and A. A. R. Awangku Yussuf. "Operational Parameters Assessment of a Biomass-To-Fuel Gas Converter." Journal of Civil Engineering, Science and Technology 5, no. 1 (April 1, 2014): 1–6. http://dx.doi.org/10.33736/jcest.125.2014.

Full text

Abstract:

This study presents the assessment on the existing mini-sized biomass-to-fuel gas (B2F) converter. Operational parameters, such as composition of after filtered residual liquid (AFRL), composition of raw combustible fuel gases produced using wood chips and coal as feedstock, and nearby incremental levels of carbon monoxide and suspended particulate during operation, are determined. Analysis results of the raw (unburnt) combustible fuel gases from low grade Balingian-Mukah coal and wood chips found that there were approximately 23-29% gasoline constituents; 15-30% diesel constituents; 1-16% CO2; 10-13% O2, CO, SO, NO and H2O; 46-71% combustible gases. It was observed that the phenol contained in the AFRL recorded approximately 5,310 mg/L. Moreover, by-products, such as 1.5% tars and 13% AFRL, were produced. The result shows that a B2F converter is suitable to harvest the combustible gases that can be used as fuel for internal combustion engines. However, the amount of organics indicated that the AFRL should not be discharged directly into watercourses without pre-treatment.

APA, Harvard, Vancouver, ISO, and other styles

4

Cox, Marie E., Edwin J. Schwalbach, Ben J. Blaiszik, and Michael A. Groeber. "AFRL Additive Manufacturing Modeling Challenge Series: Overview." Integrating Materials and Manufacturing Innovation 10, no. 2 (June 2021): 125–28. http://dx.doi.org/10.1007/s40192-021-00215-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Mitta, D. A., L. Quill, B. L. Masquelier, and P. A. Pohle. "Integrating a Systems Analysis Approach within Aircraft Maintenance Environments." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 42, no. 18 (October 1998): 1326–30. http://dx.doi.org/10.1177/154193129804201811.

Full text

Abstract:

The Crew Survivability and Logistics Division of the Air Force Research Laboratory (AFRL/HES) is currently directing a program of research focused on enhancing the task environment for programmed depot maintenance (PDM) technicians. One issue being addressed by the Integrated Technical Information for the Air Logistics Centers (ITI-ALC) program is the appropriate insertion of advanced technologies into the PDM task environment. One challenge facing AFRL/HES was to identify those PDM functions for which the insertion of ITI-ALC technologies would be most beneficial. This paper describes how the application of a traditional human factors-based systems analysis led to the identification of these functions.

APA, Harvard, Vancouver, ISO, and other styles

6

Hoffmann, Ryan, Dale Ferguson, James Patton, Adrian T. Wheelock, Jason A. Young, Mark W. Crofton, John L. Prebola, et al. "AFRL Round-Robin Test Results on Plasma Propagation Velocity." IEEE Transactions on Plasma Science 43, no. 9 (September 2015): 3006–13. http://dx.doi.org/10.1109/tps.2015.2465865.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Jenkins, Joseph C., Paul R. Havig, and Eric E. Geiselman. "Development of the Non-Distributed Flight Reference Off-Boresight Helmet-Mounted Display Symbology." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 46, no. 24 (September 2002): 1964–68. http://dx.doi.org/10.1177/154193120204602406.

Full text

Abstract:

The U.S. Air Force Research Laboratory (AFRL) is developing helmet-mounted display (HMD) symbology to support its acquisition development programs that in turn transition the latest advances in crew systems to the operational user. This HMD symbology is being designed to provide aircrew with the ability to maintain spatial orientation and awareness of aircraft state while performing off-boresight tasks across day, night, and all-weather conditions. Requirements dictate that the HMD symbology must perform at least as well as the existing head-up display symbology for off-boresight piloting tasks, as well as target acquisition and designation across air-to-air and air-to-ground missions. This paper summarizes the research conducted by AFRL investigating the non-distributed flight reference (NDFR) HMD symbology. The research describes the necessity of having off-boresight symbology on the HMD, how the NDFR symbology has been evaluated and designed to date, and most importantly, the benefit to the pilot when using off-boresight symbology compared to using the HUD alone.

APA, Harvard, Vancouver, ISO, and other styles

8

Clark, Natalie. "A “Silicon Eye” Using Mems Micromirrors." MRS Bulletin 26, no. 4 (April 2001): 320–24. http://dx.doi.org/10.1557/mrs2001.71.

Full text

Abstract:

The U.S. Air Force Research Laboratory's (AFRL) aggressive pursuit of reducing the size and weight of satellite systems for advanced space missions is providing a vital thrust to the development of “systemson-a-chip.” Adaptive optics technologies offer tremendous potential in reducing the weight and cost of space-based optical systems.

APA, Harvard, Vancouver, ISO, and other styles

9

Turinetti, J. R., W. T. Kemp, and J. R. Chavez. "Spectrum determination and modification of the AFRL Co-60 cell." IEEE Transactions on Nuclear Science 45, no. 6 (1998): 2720–26. http://dx.doi.org/10.1109/23.736520.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Mowla, Nishat I., Nguyen H. Tran, Inshil Doh, and Kijoon Chae. "AFRL: Adaptive federated reinforcement learning for intelligent jamming defense in FANET." Journal of Communications and Networks 22, no. 3 (June 2020): 244–58. http://dx.doi.org/10.1109/jcn.2020.000015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Kegley, L. E., J. Garrett, S. Minden, and J. Fraley. "High Temperature (225 °C) SiC – Based Wireless Power Demonstrator." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2015, HiTEN (January 1, 2015): 000251–54. http://dx.doi.org/10.4071/hiten-session7-paper7_3.

Full text

Abstract:

A high temperature, SiC-based wireless power demonstrator has been demonstrated by APEI engineers under Air Force Research Lab (AFRL) funding. The system consists of high temperature (> 225 °C) assembly processes and materials, including the ceramic substrate, die attach, and components. The wireless power transfer is demonstrated at different distances with respect to temperature. This system has significant implications for extreme environment applications which would benefit from condition-based monitoring.

APA, Harvard, Vancouver, ISO, and other styles

12

Cole Harmon, Ronda, Maryann Hospelhorn, Esti Gutierrez, Camille Velarde, Matthew Fetrow, and Vanessa Svihla. "Mission to Mars Amidst a Pandemic." International Journal of Designs for Learning 12, no. 1 (April 12, 2021): 158–70. http://dx.doi.org/10.14434/ijdl.v12i1.31295.

Full text

Abstract:

For years, the Air Force Research Laboratory (AFRL) in New Mexico has led an outreach effort called Mission to Mars to engage fifth grade students in applying science and mathematics concepts related to building a colony on Mars. Many organizations across the US canceled similar events due to the novel coronavirus (COVID-19) pandemic. This design case details the original program and the pivot made to continue the program. We share successes—including reaching more rural learners—insights, and challenges, and how these have shaped a more inclusive vision for future programs.

APA, Harvard, Vancouver, ISO, and other styles

13

Schwalbach, Edwin J., Michael G. Chapman, and Michael A. Groeber. "AFRL Additive Manufacturing Modeling Series: Challenge 2, Microscale Process-to-Structure Data Description." Integrating Materials and Manufacturing Innovation 10, no. 3 (June 25, 2021): 319–37. http://dx.doi.org/10.1007/s40192-021-00220-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Banaszak, David, Dansen Brown, and David Laird. "Antonomous Environmental Definition of C-130 Flap Well Skin Panel." Journal of the IEST 48, no. 1 (September 1, 2005): 50–61. http://dx.doi.org/10.17764/jiet.48.1.pw070l022uu28503.

Full text

Abstract:

Air Force C-130 aircraft require numerous aluminum doubler repairs on the wing flap skin aft of the right-hand outboard engine. These repairs are costly and require riveting. Rivets often provide new areas of stress concentration, which causes new cracks to develop elsewhere. Boeing and the Air Force Research Laboratory (AFRL) are measuring the thermal and strain environment behind the right-hand outboard engine of a North Carolina Air National Guard (NCANG) operational C-130 aircraft (TN 93-1456) for use in design of a damped repair patch to prevent the growth of cracks in skin under the wing flap panel. During June 2003. AFRL engineers and technicians acquired data using an autonomous damage dosimeter during five operational C-130 flights. The damage dosimeter measures structural strains and temperatures on in-service aircraft to diagnose structural conditions that are difficult to analyze, such as acoustics and high cycle fatigue (HCF). The first flight was from Charlotte, North Carolina to Warner Robins Air Force Base (AFB), Georgia and returned to Charlotte. The last four flights were assault flights where the C-130 simulated cargo drops. Pilots logged the altitude and indicated airspeed, engine speed, and flap positions for the first four flights. Flap position settings were compared with dosimeter temperature and root mean square (rms) strain measurements. This paper presents typical third octave plots showing engine speed vibratory frequencies, rms time histories (TH), and correlation data for a flight. This paper also presents typical limited data in TH, probability density function (PDF), power spectral density (PSD), and rain flow formats.

APA, Harvard, Vancouver, ISO, and other styles

15

Nordeen, Craig A., and Lee S. Langston. "There's a New Cycle in Town." Mechanical Engineering 140, no. 07 (July 1, 2018): 36–41. http://dx.doi.org/10.1115/1.2018-jul-2.

Full text

Abstract:

The promises of increased efficiency, simplicity, and high power density are driving the current research focus on rotating detonation engines (RDEs). An engine that uses detonation rather than deflagration could have some key advantages. If harnessed in a gas turbine or rocket, detonation could reduce the need for some expensive hardware, lighten engine weight and increase power output and efficiency. Today, variants of the RDE as a combustor for gas turbines, rockets, and scramjets are being explored at the Air Force Research Laboratory (AFRL), Naval Research Laboratory, Naval Postgraduate School, and the Department of Energy. Similar work is being conducted in several other countries. This study provides a deeper look into RDEs.

APA, Harvard, Vancouver, ISO, and other styles

16

Yuan, Zheng, Robert Crouch, Jeff Wollschlager, Amir Shojaei, and Jacob Fish. "Assessment of Altair Multiscale Designer for damage tolerant design principles (DTDP) of advanced composite aircraft structures." Journal of Composite Materials 51, no. 10 (June 6, 2016): 1379–91. http://dx.doi.org/10.1177/0021998316651707.

Full text

Abstract:

A multiscale design software (Multiscale Designer), developed by Altair, has been studied for its suitability in analysis of advanced composite aircraft structures made of polymer matrix composites. The extensive experimental data provided by the Air Force Research Laboratory (AFRL) have been utilized to characterize the linear, non-linear, monotonic, and cyclic loading properties of micro-constituents comprising the PMC system. The characterized properties have been then utilized to predict progressive damage, residual strength, and damage mechanisms in notched and unnotched plates subjected to tensile and compressive loading. The validation program consisted of two phases: (i) the blind prediction phase and (ii) the recalibration phase. While simulation results in the blind prediction phase were reasonably good, considerable improvement has been observed in the recalibration phase.

APA, Harvard, Vancouver, ISO, and other styles

17

Perry, Chris, John Buhrman, Casey Pirnstill, and John McIntire. "ATD Biodynamics During Lateral Impact for USAF Neck Injury Criteria." Safety 5, no. 4 (October 22, 2019): 71. http://dx.doi.org/10.3390/safety5040071.

Full text

Abstract:

Research was conducted involving a series of lateral impact tests on a horizontal sled facility by scientists at the Air Force Research Laboratory (AFRL). The purpose of the research was to conduct an assessment of the biodynamic response of an anthropomorphic test device (ATD) to support the development of AFRL neck injury criteria. Impacts were completed using a 50th male Hybrid III aerospace ATD due to this ATD being used by the USAF to qualify and evaluate ejection systems. A test matrix was developed to assess ATD response as a function of various seat configurations which were an approximation of the seat configurations used by the Medical College of Wisconsin (MCW) for previously conducted lateral impact tests of PMHS subjects (post-mortem human subjects). The specially fabricated seat configurations were a rigid seat fixture with a 5-point harness and a padded rigid seat with a 3-point harness. The input acceleration pulses were trapezoidal in shape and varied in peak magnitude from 8.5 to 17 G. The rigid and padded seat configurations both generated fairly linear ATD responses across the input acceleration range. The ATD’s response with the padded seat and the 3-point restraint was greater than the ATD’s response with the rigid seat and the 5-point restraint with the upper neck. The My torque showed the greatest increase from the rigid seat configuration to the padded seat configuration. This highlights the importance of a proper restraint and the importance of controlling the motion of the torso since it could reduce the loads and torques of the unrestrained head and neck, resulting in a lower probability of injury. The lateral impact program with the ATD provided critical impact data to fill data gaps that support the development of the ATD-to-human transfer functions for AFRL’s Multi-Axial Neck Injury Criteria (MANIC) for lateral impact or MANICy calculation. The program also highlighted gaps in human and PMHS head response data in identical lateral impact configurations that would not only improve the current MANICy transfer function but would allow the investigation of the efficacy of using the 6F-MANICy to replace the current MANICy.

APA, Harvard, Vancouver, ISO, and other styles

18

Shea, B., Q. Sun-Paduano, D. F. Bliss, M. C. Callahan, and C. Sung. "Characterization of Gan/Sapphire Interface and the Buffer Layer by TEM/AFM." Microscopy and Microanalysis 7, S2 (August 2001): 330–31. http://dx.doi.org/10.1017/s1431927600027720.

Full text

Abstract:

Interest in wide band gap III-V nitride semiconductor devices is increasing for optoelectronic and microelectronic device applications. to ensure the highest quality, TEM analysis can characterize the substrate and buffer layer interface. Measurements taken by TEM reveal the density of dislocations/cm2 and the orientation of Burger's vectors. This information allows for changes to be made in deposition rates, temperatures, gas flow rates, and other parameters during the processing.The GaN/sapphire samples grown at AFRL were produced in two consecutive steps, first to provide a thin buffer layer, and the other to grow a lum thick epitaxial film. Both growth steps were prepared using metallic organic chemical vapor deposition (MOCVD) in a vertical reactor. Buffer layers were prepared using a range of temperatures from 525 to 535°C and with a range of flow rates and pressures in order to optimize the nucleation conditions for the epitaxial films.

APA, Harvard, Vancouver, ISO, and other styles

19

Kancler, David E., Megan E. Gorman, Mary McWesler, Scott Bachmann, Darryl Stimson, Christopher Curtis, Capt Christian Randall, and Capt Brian Tidball. "Application of Cognitive Task Analysis in User Requirements Definition and Prototype Design." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 49, no. 23 (September 2005): 2045–49. http://dx.doi.org/10.1177/154193120504902310.

Full text

Abstract:

The Aircraft Maintenance Intuitive Troubleshooting (AMIT) project is a three-year Air Force Research Laboratory (AFRL) effort headed by the Logistics Readiness Branch, Warfighter Readiness Research Division, Human Effectiveness Directorate (HEAL) through NCI Information Systems, Inc, with the support of the University of Dayton Research Institute (UDRI). AMIT's goal is to support aircraft maintenance technicians by providing the right information, appropriate to their experience level, so they will more efficiently and effectively complete their task. Multiple data collection strategies were adopted, including an extensive literature review, a series of process interviews, and a progression of CTA interviews. The CTA effort was designed to capture where the process is inadequate or breaks down. Areas of the maintenance process identified as most challenging includes debrief, problem duplication, and troubleshooting. Resulting design recommendations include Graphical System Representations, electronic technical orders, electronic wiring diagrams, access to other information sources, and application of case based reasoning.

APA, Harvard, Vancouver, ISO, and other styles

20

Piazza, Luann, William R. Ragland, Katie E. G. Thorp, and Marc C. Martin. "The Scanning Electron Microscopy Educators Program - A Unique Educational Outreach Program at Wright-Patterson Air Force Base, Ohio." Microscopy and Microanalysis 6, S2 (August 2000): 1154–55. http://dx.doi.org/10.1017/s1431927600038265.

Full text

Abstract:

Wright-Patterson Air Force Base (near Dayton, OH) continues to offer a unique educational outreach program, Scanning Electron Microscopy EDucatorS (SEMEDS; pronounced sem-eds). This ten year old motivational science program provides an opportunity for students and educators to visit the Materials and Manufacturing Directorate's research laboratories, where scanning electron microscopes (SEMs) are used by scientists and engineers working in diverse areas of materials research.As a favorite motivational science program, SEMEDS serves surrounding communities by bringing students and educators on-site to Wright-Patterson Air Force Base's Air Force Research Laboratory (AFRL) to operate state-of-the-art SEMs in a real life research laboratory setting. The special features of this program include: exposure to a world-class facility, introductions to the elite researchers who work there, and an opportunity for students to operate the same equipment used by the facility researchers.SEMEDS is an after school program intended for middle school and high school students.

APA, Harvard, Vancouver, ISO, and other styles

21

Piazza, Luann, William R. Ragland, Katie E. G. Thorp, and Marc C. Martin. "The Tech Trek - Mobile Research Laboratory Enhances Educational Outreach Efforts at Wright-Patterson Air Force Base, Ohio." Microscopy and Microanalysis 6, S2 (August 2000): 1158–59. http://dx.doi.org/10.1017/s1431927600038289.

Full text

Abstract:

Wright-Patterson Air Force Base (near Dayton, OH) continues to expand their local community educational outreach programs with the new mobile science research laboratory, Tech Trek - Mobile Research Laboratory. Tech Trek serves surrounding communities using a 40-foot customized Blue Bird bus equipped with an R.J. Lee Instruments Limited portable scanning electron microscope (SEM). The microscope is on loan from the Materials and Manufacturing Directorate of the Air Force Research Laboratory (AFRL) at Wright-Patterson Air Force Base.The purpose of the Tech Trek program is to stimulate school science programs by making state-of-the-art, usually cost-prohibitive scientific equipment and experienced support staff accessible to schools. The program is focussed on providing opportunities for students currently in the grades six through twelve, our future scientists and engineers, to interact with role models in science and technology while being engaged in interesting scientific research. Using this mobile format combination classroom and laboratory,

APA, Harvard, Vancouver, ISO, and other styles

22

Chapman, Michael G., Megna N. Shah, Sean P. Donegan, J. Michael Scott, Paul A. Shade, David Menasche, and Michael D. Uchic. "AFRL Additive Manufacturing Modeling Series: Challenge 4, 3D Reconstruction of an IN625 High-Energy Diffraction Microscopy Sample Using Multi-modal Serial Sectioning." Integrating Materials and Manufacturing Innovation 10, no. 2 (June 2021): 129–41. http://dx.doi.org/10.1007/s40192-021-00212-9.

Full text

Abstract:

AbstractHigh-energy diffraction microscopy (HEDM) in-situ mechanical testing experiments offer unique insight into the evolving deformation state within polycrystalline materials. These experiments rely on a sophisticated analysis of the diffraction data to instantiate a 3D reconstruction of grains and other microstructural features associated with the test volume. For microstructures of engineering alloys that are highly twinned and contain numerous features around the estimated spatial resolution of HEDM reconstructions, the accuracy of the reconstructed microstructure is not known. In this study, we address this uncertainty by characterizing the same HEDM sample volume using destructive serial sectioning (SS) that has higher spatial resolution. The SS experiment was performed on an Inconel 625 alloy sample that had undergone HEDM in-situ mechanical testing to a small amount of plastic strain (~ 0.7%), which was part of the Air Force Research Laboratory Additive Manufacturing (AM) Modeling Series. A custom-built automated multi-modal SS system was used to characterize the entire test volume, with a spatial resolution of approximately 1 µm. Epi-illumination optical microscopy images, backscattered electron images, and electron backscattered diffraction maps were collected on every section. All three data modes were utilized and custom data fusion protocols were developed for 3D reconstruction of the test volume. The grain data were homogenized and downsampled to 2 µm as input for Challenge 4 of the AM Modeling Series, which is available at the Materials Data Facility repository.

APA, Harvard, Vancouver, ISO, and other styles

23

Menasche, David B., William D. Musinski, Mark Obstalecki, Megna N. Shah, Sean P. Donegan, Joel V. Bernier, Peter Kenesei, Jun-Sang Park, and Paul A. Shade. "AFRL Additive Manufacturing Modeling Series: Challenge 4, In Situ Mechanical Test of an IN625 Sample with Concurrent High-Energy Diffraction Microscopy Characterization." Integrating Materials and Manufacturing Innovation 10, no. 3 (June 9, 2021): 338–47. http://dx.doi.org/10.1007/s40192-021-00218-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Chehroudi, Bruce. "Recent Experimental Efforts on High-Pressure Supercritical Injection for Liquid Rockets and Their Implications." International Journal of Aerospace Engineering 2012 (2012): 1–31. http://dx.doi.org/10.1155/2012/121802.

Full text

Abstract:

Pressure and temperature of the liquid rocket thrust chambers into which propellants are injected have been in an ascending trajectory to gain higher specific impulse. It is quite possible then that the thermodynamic condition into which liquid propellants are injected reaches or surpasses the critical point of one or more of the injected fluids. For example, in cryogenic hydrogen/oxygen liquid rocket engines, such as Space Shuttle Main Engine (SSME) or Vulcain (Ariane 5), the injected liquid oxygen finds itself in a supercritical condition. Very little detailed information was available on the behavior of liquid jets under such a harsh environment nearly two decades ago. The author had the opportunity to be intimately involved in the evolutionary understanding of injection processes at the Air Force Research Laboratory (AFRL), spanning sub- to supercritical conditions during this period. The information included here attempts to present a coherent summary of experimental achievements pertinent to liquid rockets, focusing only on the injection of nonreacting cryogenic liquids into a high-pressure environment surpassing the critical point of at least one of the propellants. Moreover, some implications of the results acquired under such an environment are offered in the context of the liquid rocket combustion instability problem.

APA, Harvard, Vancouver, ISO, and other styles

25

Nur, Muhammad, M. Fadjar Rahardjo, Charles P. H. Simanjuntak, Djumanto Djumanto, and Krismono Krismono. "Morphometric and meristic characteristics of an endemic Lagusia micracanthus Bleeker, 1860 in the rivers of Maros and Wallanae Cenrana Watersheds." Jurnal Iktiologi Indonesia 20, no. 2 (June 1, 2020): 189. http://dx.doi.org/10.32491/jii.v20i2.524.

Full text

Abstract:

Pirik (Lagusia micracanthus Bleeker, 1860) is one of endemic fishes in Sulawesi. Morphometric and meristic information of Pirik population in various habitats are unknown. The present study aimed to determine the morphometric and meristic variation of Pirik in Maros and Wallanae Cenrana watersheds. Sampling collection was carried out monthly from May 2018 to April 2019 in the Maros watershed, namely Pattunuang River (M1), Bantimurung River (M2), Pucak River (M3); and in Wallanae Cenrana watershed particularly in Camba River (W1), Sanrego River (W2), and Ompo River (W3). Morphometric measurements consisted of 31 characters and meristic measurements consisted of 10 characters. Morphometric data was standardized by dividing all morphometric characters by standard length (SL). Analysis of variance (ANOVA) and discriminant analysis (Discriminant Function Analysis) were applied for data analysis. The results showed that the Pirik taken from rivers in the Maros and Wallanae Cenrana watershed are two different population groups. There are 12 distinguishing morphometric features for Pirik of the Maros and Wallanae Cenrana watershed, i.e. TL (total length), SL (standard length), BDdSA (body depth-dorsal fin origin), HL (head length), Jlup (upper-jaw length), PAfL (pre-anal fin length), ABL (Anal fin base length), PelRL (pelvic ray length), AFRL (anal fin ray length), CPL (caudal peduncle length), CLLup (upper caudal lobe length) and CLLmid (mid-caudal length). There is no significant difference of meristic characters of Pirik obtained from the Maros and Wallanae Cenraa watersheds.

APA, Harvard, Vancouver, ISO, and other styles

26

Hudson, Jeffrey A., Aernout Oudenhuijzen, and Gregory F. Zehner. "Digital Human Modelling Systems: A Procedure for Verification and Validation Using the F-16 Crew Station." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 44, no. 38 (July 2000): 723–26. http://dx.doi.org/10.1177/154193120004403810.

Full text

Abstract:

Digital Human Modelling Systems (HMS's) are considered a basic element in the cockpit design process. Their bio-fidelity has yet to be fully demonstrated, however. Currently, a joint project, undertaken by the Air Force Research Lab (AFRL/HECP) and the Netherlands (TNO HFRI), is addressing this issue. This effort will help improve methods for controlling and assuring anthropometric accommodation of crew systems in military aircraft. A verification and validation procedure is being developed as a part of this project and has been implemented for several commercially available HMS's. The two phases of the procedure are: 1. Anthropometric Verification: Quantify and compare a set of anthropometric values measured on 8 test subjects with the same set measured on their corresponding digital manikins (their human models), and 2. F-16 Cockpit Validation: Quantify and compare field test results (involving reaches, clearance, vision) of the same 8 test subjects in an F-16 cockpit, to the digital test results obtained with the HMS's using digital models of the subjects placed in an F-16 CAD drawing. The digital tests are conducted without knowledge of the field data results. The ultimate goal of this project is to set the standard for verification and validation of Human Modelling Systems to ensure their bio-fidelity. A complete discussion of the methods is provided below. The results, however, were not available at the time this manuscript was submitted, but will be covered in the oral presentation.

APA, Harvard, Vancouver, ISO, and other styles

27

Cocke, Carter K., Anthony D. Rollett, Ricardo A. Lebensohn, and Ashley D. Spear. "The AFRL Additive Manufacturing Modeling Challenge: Predicting Micromechanical Fields in AM IN625 Using an FFT-Based Method with Direct Input from a 3D Microstructural Image." Integrating Materials and Manufacturing Innovation 10, no. 2 (May 17, 2021): 157–76. http://dx.doi.org/10.1007/s40192-021-00211-w.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Fang, Eugene, Xiaodong Cui, and Jim Lua. "A continuum damage and discrete crack-based approach for fatigue response and residual strength prediction of notched laminated composites." Journal of Composite Materials 51, no. 15 (June 2017): 2203–25. http://dx.doi.org/10.1177/0021998317705975.

Full text

Abstract:

This paper presents a combined continuum damage and discrete crack (CDDC) modelling approach for fatigue damage characterization and post-fatigue residual strength prediction of laminated composite components with a hole. In order to capture both the fatigue cycle-driven material degradation and discrete damage-induced stress concentration and redistribution, an overlapped element approach is developed based on a combined user-defined material (UMAT) and user-defined element (UEL). An Abaqus element coupled with UMAT for fatigue damage characterization is used to detect the location of failure initiation, while the discrete crack network-based (DCN) UEL is applied to insert a crack without remeshing. The intensified stress field induced by the newly inserted matrix crack is used for the evaluation of failure initiation and stiffness degradation. The UMAT for the fatigue analysis has incorporated the stress-cycle ( S-N) curves for the damage evolution characterization associated with matrix and fiber based on the tested S-N curves for plies at their different orientations. A continuum damage mechanics (CDM) approach is used for the fatigue-driven delamination initiation and propagation by insertion of a finite thickness interface layer at each ply interface. Both the blind and recalibrated predictions are performed for specimens of three different layups under the Air Force Tech Scout 1 program. The predicted fatigue failure progression and the stiffness against cycle curves are compared with the test data provided by the Air Force Research Lab (AFRL). In addition, post-fatigue residual strength predictions are performed for these notched specimens under tension and compression.

APA, Harvard, Vancouver, ISO, and other styles

29

Gunasekaran, Sidaard, and Aaron Altman. "Far Wake and Its Relation to Aerodynamic Efficiency." Energies 14, no. 12 (June 18, 2021): 3641. http://dx.doi.org/10.3390/en14123641.

Full text

Abstract:

Correlations were found between the aerodynamic efficiency and the mean and fluctuating quantities in the far wake of a wall-to-wall SD7003 model and an AR 4 flat plate. This correlation was described algebraically by modeling the wake signature as a function of wing geometry and initial conditions. The model was benchmarked against experimental results to elicit the wing performance as a function of angle of attack by interrogating the wake. In these algebraic models, the drag coefficient along with other initial conditions of the turbulent generator (either airfoil or wing) were used to reconstruct the Reynolds Stress distribution and the momentum deficit distribution in the turbulent wake. Experiments were undertaken at the United States Air Force Research Labs Horizontal Free Surface Water Tunnel (AFRL/HFWT). These experiments build on previous results obtained at the University of Dayton Low Speed Wind Tunnel (UD-LSWT) on a cylinder, an AR 7 SD7062 wing, and a small remote control twin motor aircraft. The Reynolds stress and the momentum deficit of the turbulent generators were experimentally determined using Particle Image Velocimetry (PIV) with a minimum of 1000 image pairs averaged at each condition. The variation of an empirical factor (γ) used to match the Reynolds stress and momentum deficit distributions showed striking correlation to the variation of drag and aerodynamic efficiency of the turbulent generator. This correlation suggests that the wing performance information is preserved in the free shear layer 10 chord lengths downstream of the trailing edge (TE) of the wing irrespective of the dimensionality of the flow.

APA, Harvard, Vancouver, ISO, and other styles

30

Gao, Kun, Yong Zhang, Shufen Sun, Baocheng Lin, Weidong Liu, Wenqiang Lai, Yihong Wu, et al. "Novel inflammatory markers in the blood of patients with knee synovitis." Journal of International Medical Research 49, no. 7 (July 2021): 030006052110295. http://dx.doi.org/10.1177/03000605211029557.

Full text

Abstract:

Objective Synovitis is a joint disease that seriously affects patient quality of life, but there are currently no diagnostic markers. The albumin to fibrinogen ratio (AFR) and monocyte to lymphocyte ratio (MLR) are non-invasive and cost-effective markers for various systemic inflammatory diseases. However, these markers have not yet been investigated for synovitis. This cross-sectional study evaluated the predictive ability of AFR and MLR in patients with non-specific knee synovitis. Methods One hundred fifty-five patients with knee synovitis and 108 healthy control patients were enrolled. Patient characteristics, blood parameters, AFRs, and MLRs were assessed, and the diagnostic value of these factors was determined. Results Among 125 patients included, patients with synovitis had a lower AFR and higher MLR than control subjects. The diagnostic values of AFR and MLR were 0.86 and 0.84, respectively, and higher compared with other parameters by receiver operating characteristic curve assessments. Additionally, MLR was negatively correlated with AFR. Late-stage patients showed significantly lower AFRs and significantly higher MLRs than early-stage patients. Binary logistic regression analyses indicated that AFR was an independent predictor for synovitis severity. Conclusions The AFR and MLR had high diagnostic value for knee synovitis. The AFR was an independent predictor for synovitis severity.

APA, Harvard, Vancouver, ISO, and other styles

31

Pitanga, Francisco José Gondim, Inês Lessa, Paulo José B. Barbosa, Simone Janete O. Barbosa, Maria Cecília Costa, and Adair da Silva Lopes. "Fatores sociodemográficos associados aos diferentes domínios da atividade física em adultos de etnia negra." Revista Brasileira de Epidemiologia 15, no. 2 (June 2012): 363–75. http://dx.doi.org/10.1590/s1415-790x2012000200014.

Full text

Abstract:

OBJETIVO: Analisar a prevalência e os fatores sociodemográficos associados aos diferentes domínios da atividade física em adultos de etnia negra. MÉTODOS: Estudo transversal com amostra de 2.305 adultos negros de 20 a 96 anos de idade, sendo 902 (39,1%) homens, residentes na cidade de Salvador, BA, Brasil. Foram analisadas as variáveis sociodemográficas sexo, idade, escolaridade, nível socioeconômico (NSE), estado civil, discriminação racial no trabalho/escola (DRTE), em ambientes públicos (DRAPU) e privados (DRAPR) e percepção de policiamento (PPB)/violência no bairro (PVB), além da atividade física total (AFT) e em diferentes domínios: tempo livre (AFTL), trabalho (AFTR), deslocamento (AFDL) e doméstico (AFDM). As associações foram analisadas por meio dos testes qui-quadrado, qui-quadrado de tendência e razão de prevalência (RP). Utilizou-se também regressão logística para estimar a razão de chances (RC) com intervalo de confiança de 95%. RESULTADOS: As proporções de indivíduos ativos foram 39,1% para AFT, 11,2% para AFTL, 9,6% para AFTR, 23,7% para AFDL e 33,7% para AFDM. A AFT associou-se positivamente com escolaridade e inversamente com sexo masculino, idade maior que 60 anos e com não PPB. A AFTL associou-se positivamente com sexo masculino, maior escolaridade e maior NSE. A AFTR associou-se inversamente à idade maior que 60 anos e positivamente com o sexo masculino, maior escolaridade e não PPB. A AFDL associou-se inversamente à idade maior que 60 anos e positivamente ao sexo masculino. A AFDM associou-se inversamente com o sexo masculino, idade maior que 60 anos e não PPB; e positivamente com maior escolaridade e NSE. CONCLUSÕES: Os fatores sociodemográficos, principalmente sexo, idade e escolaridade se mostraram associados aos diferentes domínios da atividade física em adultos de etnia negra.

APA, Harvard, Vancouver, ISO, and other styles

32

Camara, J., A. Yu Antipova, M. A. Bichurina, V. V. Zarubaev, N. Magassouba, and I. N. Lavrentieva. "Implementation of the program of measles elimination in the WHO African region." Russian Journal of Infection and Immunity 9, no. 3-4 (November 15, 2019): 449–56. http://dx.doi.org/10.15789/2220-7619-2019-3-4-449-456.

Full text

Abstract:

The review is devoted to the analysis of the available literature on the elimination of measles. The review focuses on the current measles epidemic situation in the African Region (AFR) and the implementation of the WHO strategic plan for the elimination of measles in AFR by 2020. Measles in the AFR is characterized by a severe course with a high risk of death due to malnutrition, vitamin A deficiency, concomitant bacterial and viral infections, and malaria. In 2015, 105,256 cases of measles were reported in the WHO African Region, most of them among children under 5 years old, 79% of whom were not vaccinated or had unknown vaccine status. Initially, the strategy for implementing the measles elimination program in AFRs was based on a combination of immunization campaigns for children under 14 years of age (coverage of more than 90%) and routine vaccination of at least 90% of children aged 9–15 months. It was recommended to repeat the campaign of mass immunization of children aged 9 months up to 4 years every 3–5 years. The use of this strategy has reduced the number of measles cases by 83–97% during the first year of additional immunization programs. The recommended age of routine measles vaccination in AFRs is 9 months — a strategy to reduce infant mortality, including that due to complications of measles. In 2016, measles vaccination was introduced into the national immunization schedule in all AFR countries, and 24 countries introduced revaccination. Currently, the measles elimination program in a number of AFR countries is based on two-dose immunization (MCV1 and MCV2). The measles prevention program in a number of AFR countries was disrupted due to the Ebola epidemic. There are some common problems in the realization of the program in AFR countries. All AFR countries are committed to the measles elimination program. The review provides information on strategies and successes in overcoming challenges to achieve the goals set for the WHO African Region in the implementation of the programme of measles elimination.

APA, Harvard, Vancouver, ISO, and other styles

33

Zhao, Yi, Kaitai Liang, Bo Yang, and Liqun Chen. "CCA Secure Public Key Encryption against After-the-Fact Leakage without NIZK Proofs." Security and Communication Networks 2019 (October 31, 2019): 1–8. http://dx.doi.org/10.1155/2019/8357241.

Full text

Abstract:

In leakage resilient cryptography, there is a seemingly inherent restraint on the ability of the adversary that it cannot get access to the leakage oracle after the challenge. Recently, a series of works made a breakthrough to consider a postchallenge leakage. They presented achievable public key encryption (PKE) schemes which are semantically secure against after-the-fact leakage in the split-state model. This model puts a more acceptable constraint on adversary’s ability that the adversary cannot query the leakage of secret states as a whole but the functions of several parts separately instead of prechallenge query only. To obtain security against chosen ciphertext attack (CCA) for PKE schemes against after-the-fact leakage attack (AFL), existing works followed the paradigm of “double encryption” which needs noninteractive zero knowledge (NIZK) proofs in the encryption algorithm. We present an alternative way to achieve AFL-CCA security via lossy trapdoor functions (LTFs) without NIZK proofs. First, we formalize the definition of LTFs secure against AFL (AFLR-LTFs) and all-but-one variants (ABO). Then, we show how to realize this primitive in the split-state model. This primitive can be used to construct AFLR-CCA secure PKE scheme in the same way as the method of “CCA from LTFs” in traditional sense.

APA, Harvard, Vancouver, ISO, and other styles

34

Bueno, Denise R., Henrique L. Monteiro, Clara S. C. Rosa, Jamile S. Codogno, Rômulo A. Fernandes, and Maria F. N. Marucci. "Associação entre níveis de atividade física e polifarmácia em pacientes hipertensos." Medicina (Ribeirao Preto. Online) 49, no. 3 (June 8, 2016): 240. http://dx.doi.org/10.11606/issn.2176-7262.v49i3p240-247.

Full text

Abstract:

Introdução: o exercício reduz o uso de medicamentos em indivíduos hipertensos. Contudo, diferentes domínios de atividade física (AF) não têm sido estudados no intuito de analisar suas relações com o uso de múltiplos medicamentos, conhecido como polifarmácia. Objetivo: analisar a associação entre AF em diferentes domínios (tempo livre, locomoção e ocupação) e polifarmácia em indivíduos hipertensos. Métodos: trata-se de um estudo transversal realizado com 190 hipertensos. Polifarmácia foi definida como o uso simultâneo de três ou mais drogas. As variáveis independentes foram os domínios de AF: Locomoção (AFL); Tempo Livre (AFTL) e Ocupacional (AFO). A regressão logística múltipla foi empregada para analisar as associações. O teste de Mann Whitney foi empregado para comparar se a média de medicamentos usados diferia entre domínios de AF. Resultados: o número total de drogas usadas variou de 0 a 7, com média de 2.35 (±1.6) por pessoa. Escores de AFTL (OR: 3.25; IC95%: 1.61-6.54) e AFL (OR: 2.15; IC95%: 1.09-4.25) foram inversamente associadas à polifarmácia em hipertensos (controlado por IMC, número de doenças crônicas, fumo, consumo de álcool e cor da pele). Conclusão: menor AF no tempo livre e de locomoção foi associada à polifarmácia em indivíduos hipertensos

APA, Harvard, Vancouver, ISO, and other styles

35

Bortz, David M. "Eigenvalues for a Two-Lag Linear Delay Differential Equation∗∗Portions of this work were performed with support from DARPA, AFRL, and HRL, under contract FA8650–11–C–7158. Approved for Public Release, Distribution Unlimited." IFAC-PapersOnLine 48, no. 12 (2015): 13–16. http://dx.doi.org/10.1016/j.ifacol.2015.09.345.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Masjudin and Wei-Chin Chang. "Combustion performance of the premixed and diffusion burners with used lubricating oil and used cooking oil as fuel." Modern Physics Letters B 33, no. 14n15 (May 28, 2019): 1940005. http://dx.doi.org/10.1142/s0217984919400050.

Full text

Abstract:

This work investigated combustion performance of the premixed and diffusion burners by measuring flame temperature and gas emissions with used lubricating oil (ULO) and used cooking oil (UCO). Air–fuel ratio (AFR) is an important parameter to investigate combustion performance. Flame temperatures and gas emissions of the burners were examined to know the combustion behavior. The results found were that the flame temperatures in the premixed burner were higher than the diffusion burner at all the AFRs. The maximum flame temperature was obtained at AFR = 16 at all types of burners and fuel blending ratios. The highest flame temperature was [Formula: see text], which occurred when using 100% ULO with premixed burner at AFR = 16. By adding UCO into ULO, the flame temperatures can be decreased. The premixed burner produced 86.67% and 71.23% less CO and HC emissions, respectively, than the diffusion burner, in contrast, the premixed burner formed 26.31% and 54.7% higher [Formula: see text] and [Formula: see text] emissions, respectively, than the diffusion burner.

APA, Harvard, Vancouver, ISO, and other styles

37

Rasmussen, D. K., R. Weber, and B. Wechsler. "Performance, lean meat proportion and behaviour of fattening pigs given a liquid diet at different animal/feeding-place ratios." Animal Science 82, no. 4 (August 2006): 575–80. http://dx.doi.org/10.1079/asc200668.

Full text

Abstract:

AbstractSensor feeding is a liquid feeding system for fattening pigs that is operated with a restricted animal/feeding-place ratio (AFR). The aim of the present study was to quantify the effect of three different AFRs (4:1, 7:1 and 13:1, calculated with a feeding space of 33 cm per animal) on the performance and behaviour of fattening pigs (mean initial weight 26·3 (s.d. 3·3) kg, live weight at slaughter 102 (s.d. 5) kg). The pigs were housed in groups of 40 and each AFR was tested with seven groups (21 groups in total). The daily weight gain of the individual pigs was calculated from the beginning of the experiments until slaughter. Additionally, the lean meat percentage was recorded (AutoFOM). Feeding behaviour was observed by means of 24-h video recording at the ages of 14 and 17 weeks with scan sampling every 5 min. The daily weight gain decreased with increasing AFR (P<0·01) and females had lower weight gains than barrows (P<0·001). The lean meat proportion was influenced by the AFR (P<0·01) and sex of the pigs (P<0·001). Proportions were highest with the AFR 13:1 and in females. The average number of pigs feeding simultaneously was highest for the AFR of 4:1 (P<0·01). Moreover, the ingestion rate per day (kg/min) increased with increasing AFR (P<0·05). The average number of pigs waiting behind other pigs feeding at the trough was highest with the AFR 13:1 (P<0·001).In conclusion, growth performance and pig behaviour were negatively affected by an AFR of 13:1, which cannot be recommended for use with this feeding system. With an AFR of 4:1 lean meat values were low.

APA, Harvard, Vancouver, ISO, and other styles

38

Souza de Assis, Yésia. "CRIANÇAS ATIVAS, APRENDIZAGEM E AFRO-BRASILIDADE: PENSANDO O APRENDIZADO AFRO-BRASILEIRO NA CASA DE SANTA BÁRBARA." Revista da Associação Brasileira de Pesquisador@s Negr@s - ABPN 10, Edição Especial (2018): 530–48. http://dx.doi.org/10.31418/2177-2770.2018.v10.n00.p530-548.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Choi, June-Ho, Kyung-Chan Park, Young-Hak Lee, Hee-Cheul Kim, and Jae-Sam Lee. "Experimental Study on Bond Strength of AFRP Rebar in Normal Strength Concrete." Journal of the Earthquake Engineering Society of Korea 13, no. 1 (February 28, 2009): 9–16. http://dx.doi.org/10.5000/eesk.2009.13.1.009.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Lee, Young-Hak, Min-Sook Kim, Jang-Se Cho, and Hee-Cheul Kim. "Shear Strength of Concrete Deep Beam Reinforced AFRP rebar." Journal of the Earthquake Engineering Society of Korea 13, no. 6 (December 31, 2009): 1–9. http://dx.doi.org/10.5000/eesk.2009.13.6.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Fang, Z.-Q., D. C. Look, Wook Kim, and H. Morkoç. "Characteristics of Deep Centers Observed in n-GaN Grown by Reactive Molecular Beam Epitaxy." MRS Internet Journal of Nitride Semiconductor Research 5, S1 (2000): 943–49. http://dx.doi.org/10.1557/s1092578300005305.

Full text

Abstract:

Deep centers in Si-doped n-GaN samples grown on sapphire by reactive molecular beam epitaxy, using different ammonia flow rates (AFRs), have been studied by deep level transient spectroscopy. In addition to five electron traps, which were also found in n-GaN layers grown by both metalorganic chemical-vapor deposition and hydride vapor-phase epitaxy, two new centers C1 (0.43-0.48 eV) and E1 (0.25 eV) have been observed. C1, whose parameters show strong electric-field effects and anomalous electron capture kinetics, might be associated with dislocations. E1, which is very dependent on the AFR, exhibits an activation energy close to that of a center created by electron irradiation and is believed to be a defect complex involving VN.

APA, Harvard, Vancouver, ISO, and other styles

42

Kotula, T., and J. Peyras. "Afri." Encyclopédie berbère, no. 2 (November 1, 1985): 208–15. http://dx.doi.org/10.4000/encyclopedieberbere.886.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Otten, Anna, and Eva Demski. "Afra." World Literature Today 67, no. 4 (1993): 810. http://dx.doi.org/10.2307/40149656.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Wyatt, Neal, and Shana M. Higgins. "Afro-Latinos." Reference & User Services Quarterly 47, no. 1 (September 1, 2007): 10–15. http://dx.doi.org/10.5860/rusq.47n1.10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Dunlop, Jenna. "Coleura afra." Mammalian Species, no. 566 (October 24, 1997): 1. http://dx.doi.org/10.2307/3504502.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Jordan, Joseph. "Afro-Colombian." Souls 6, no. 2 (June 2004): 19–30. http://dx.doi.org/10.1080/10999940490507022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Gordon, Lewis R., Annie Menzel, George Shulman, and Jasmine Syedullah. "Afro pessimism." Contemporary Political Theory 17, no. 1 (December 7, 2017): 105–37. http://dx.doi.org/10.1057/s41296-017-0165-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Campbell, Briana. "Afro-Latina." Minnesota review 2020, no. 94 (May 1, 2020): 32. http://dx.doi.org/10.1215/00265667-8128210.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Lima, Conceição, and Russell G. Hamilton. "Afro-Insularity." Callaloo 30, no. 1 (2007): 309–10. http://dx.doi.org/10.1353/cal.2007.0148.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Gratzer, Walter. "Afro-Nature." Nature 353, no. 6343 (October 1991): 459–60. http://dx.doi.org/10.1038/353459b0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!