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Sample records for aircraft company maryland

  1. 76 FR 6525 - Airworthiness Directives; Cessna Aircraft Company (Type Certificate Previously Held by Columbia...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-07

    ... Company (Type Certificate Previously Held by Columbia Aircraft Manufacturing (Previously the Lancair... Aircraft Company (Type Certificate Previously Held by Columbia Aircraft Manufacturing (Previously The... Aircraft Company (type certificate previously held by Columbia Aircraft Manufacturing (previously...

  2. 75 FR 66009 - Airworthiness Directives; Cessna Aircraft Company (Type Certificate Previously Held by Columbia...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-27

    ... Company (Type Certificate Previously Held by Columbia Aircraft Manufacturing (Previously the Lancair... directive (AD): Cessna Aircraft Company (Type Certificate Previously Held by Columbia Aircraft Manufacturing... Company (type certificate previously held by Columbia Aircraft Manufacturing (previously The...

  3. 76 FR 53308 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-26

    ..., amendment 39-16074 (74 FR 57408, November 6, 2009), for certain Cessna Aircraft Company (Cessna) Models 150F... 2009-10-09 R1, Amendment 39-16074 (74 FR 57408, November 6, 2009); Cessna Aircraft Company Service... elevator. Actions Since AD Was Issued Since we issued AD 2009-10-09 R1 (74 FR 57408, November 6,...

  4. 76 FR 82205 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-30

    ... Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska, and (4) Will... Aircraft Company Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed... Aircraft Company Model 560XL airplanes. This proposed AD was prompted by reports of jammed or stiff...

  5. 77 FR 41937 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-17

    ... ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will... Aircraft Company Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed... Aircraft Company Model 750 airplanes. This proposed AD was prompted by reports of loss of...

  6. 76 FR 69123 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-08

    ... . SUPPLEMENTARY INFORMATION: Airworthiness Directive 2009-10-09 R2, Amendment 39-16782 (76 FR 53308, August 26...-030-AD; Amendment 39-16782; AD 2009-10-09 R2] RIN 2120-AA64 Airworthiness Directives; Cessna Aircraft.... That AD applies to certain Cessna Aircraft Company (Cessna) Models 150F, 150G, 150H, 150J, 150K,...

  7. 77 FR 59146 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-26

    ... ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Cessna Aircraft... Aircraft Company Model 500, 501, 550, 551, S550, 560, 560XL, and 650 airplanes. This proposed AD...

  8. 77 FR 75590 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-21

    ... Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska... Federal Aviation Administration 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Cessna Aircraft... Aircraft Company (Cessna) (previously COLUMBIA or LANCAIR) Models LC40-550FG, LC41-550FG, and...

  9. 77 FR 21420 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-10

    ..., 2011 (76 FR 54141), and proposed to require adding diodes to the fuel cross-feed wiring, and revising... presents the comments received from Cessna Aircraft Company (Cessna), the manufacturer, on the NPRM (76 FR... commented that the NPRM (76 FR 54141, August 31, 2011) has incorrect references to certain AFM TCs, does...

  10. CFD validation experiments at McDonnell Aircraft Company

    NASA Technical Reports Server (NTRS)

    Verhoff, August

    1987-01-01

    Information is given in viewgraph form on computational fluid dynamics (CFD) validation experiments at McDonnell Aircraft Company. Topics covered include a high speed research model, a supersonic persistence fighter model, a generic fighter wing model, surface grids, force and moment predictions, surface pressure predictions, forebody models with 65 degree clipped delta wings, and the low aspect ratio wing/body experiment.

  11. 78 FR 14640 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-07

    ... presents the comments received on the proposal (77 FR 41937, July 17, 2012) and the FAA's response to each comment. Request To Change Compliance Time Cessna Aircraft Company (Cessna) requested that the NPRM (77 FR..., 2012 (77 FR 41937). That NPRM proposed to require inspecting certain logic modules to determine...

  12. 77 FR 70114 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-23

    ..., 2012 (77 FR 6003, February 7, 2012). (i) Cessna Aircraft Company Cessna Service Bulletin SB07-28-01... publication listed in this AD as of March 13, 2012 (77 FR 6003, February 7, 2012). ADDRESSES: For service... Register on August 20, 2012 (77 FR 50054). That NPRM proposed to require you to inspect the fuel...

  13. 76 FR 1349 - Airworthiness Directives; Cessna Aircraft Company (Cessna) (Type Certificate A00003SE Previously...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-10

    ... Company (Cessna) (Type Certificate A00003SE Previously Held by Columbia Aircraft Manufacturing (Previously... airworthiness directive (AD): 2010-26-54 Cessna Aircraft Company (Type Certificate A00003SE previously held by...) None. Applicability (c) This AD applies to the following Cessna Aircraft Company (Cessna)...

  14. 78 FR 37958 - Special Conditions: Cessna Aircraft Company, Model J182T; Electronic Engine Control System...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-25

    ... Federal Aviation Administration 14 CFR Part 23 Special Conditions: Cessna Aircraft Company, Model J182T... Cessna Aircraft Company (Cessna) Model J182T airplane. This airplane will have a novel or unusual design..., 2000 (65 FR 19477-19478), as well as at http://DocketsInfo.dot.gov . Docket: Background documents...

  15. INTELSAT VI series spacecraft (one of five) at Hughes Aircraft Company

    NASA Technical Reports Server (NTRS)

    1992-01-01

    International Telecommunications Satellite Organization (INTELSAT) VI series spacecraft (one of five), weighing about 4.5 tons at launch and standing nearly 40 ft tall when deployed, is prepared for final testing at Hughes Aircraft Company in El Segundo, California.

  16. Meeting the challenges with the Douglas Aircraft Company Aeroelastic Design Optimization Program (ADOP)

    NASA Technical Reports Server (NTRS)

    Rommel, Bruce A.

    1989-01-01

    An overview of the Aeroelastic Design Optimization Program (ADOP) at the Douglas Aircraft Company is given. A pilot test program involving the animation of mode shapes with solid rendering as well as wire frame displays, a complete aircraft model of a high-altitude hypersonic aircraft to test ADOP procedures, a flap model, and an aero-mesh modeler for doublet lattice aerodynamics are discussed.

  17. 78 FR 50317 - Special Conditions: Cessna Aircraft Company, Model J182T; Diesel Cycle Engine Installation

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-19

    ...These special conditions are issued for the Cessna Aircraft Company (Cessna) Model J182T airplane. This airplane will have a novel or unusual design feature(s) associated with the installation of an aircraft diesel engine (ADE). The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the......

  18. General view of site, looking northwest from Western Maryland Railway ...

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

    General view of site, looking northwest from Western Maryland Railway grade crossing. Kreider-Reisner shed is in shadows at left, barn at right. Fairchild No. 1 in background. - Kreider-Reisner Aircraft Company, Shed, 851 Pennsylvania Avenue, Hagerstown, Washington County, MD

  19. 77 FR 2659 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-19

    ... inspection of the torque lug and surrounding components (wheel base, side rim, lock ring) for damage (such as... Cessna Aircraft Co., P.O. Box 7706, Wichita, Kansas 67277-7706; telephone (316) 517-6215; fax (316) 517..., Aircraft Wheels & Brakes, P.O. Box 340, Troy, Ohio 45373-3872; telephone (937) 440-2130; fax (937)...

  20. 77 FR 29863 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-21

    ... Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska...-015-AD; Amendment 39-17053; AD 2012-10-04] RIN 2120-AA64 Airworthiness Directives; Cessna Aircraft... comments. SUMMARY: We are adopting a new airworthiness directive (AD) for certain Cessna Aircraft...

  1. 76 FR 67346 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-01

    ... 12866, (2) Is not a ``significant rule'' under DOT Regulatory Policies and Procedures (44 FR 11034... operators of these airplanes. This AD requires replacing certain lithium-ion batteries installed as the main... equipped with a lithium-ion battery as the main aircraft battery. We are issuing this AD to correct...

  2. 77 FR 55770 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-11

    ... Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska... area of the landing gear's hydraulic power pack system. This proposed AD would require you inspect the aircraft's hydraulic power pack wiring for incorrect installation, and if needed, correct the...

  3. 78 FR 4092 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-18

    ... September 11, 2012 (77 FR ] 55770). That NPRM proposed to require you to inspect the aircraft's hydraulic... 12866, the Regulatory Flexibility Act, or DOT Regulatory Policies and Procedures (44 FR 11034, February.... FAA- 2012-0962, published in the Federal Register on September 11, 2012 (77 FR 55770), is...

  4. 77 FR 50954 - Airworthiness Directives; Cessna Aircraft Company

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-23

    ... Aircraft Corporation). That NPRM published in the Federal Register on October 29, 2010 (75 FR 66700). That NPRM (75 FR 66700, October 29, 2010) was prompted by a report that a Cessna Model 414A airplane, which... configuration. That NPRM (75 FR 66700, October 29, 2010) proposed to require a complete inspection of the...

  5. 78 FR 14726 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-07

    ... 39-11583 (65 FR 8649, February 22, 2000). (c) Applicability This AD applies to Cessna Aircraft... the Federal Register on October 2, 2012 (77 FR 60062). That NPRM proposed to supersede an existing AD... life limit. Actions Since Previous NPRM Was Issued Since we issued the previous NPRM (77 FR...

  6. 77 FR 59873 - Airworthiness Directives; Cessna Aircraft Company Airplanes; Initial Regulatory Flexibility Analysis

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-01

    ... FR 32103). That NPRM proposed to require you to install a placard that prohibits flight into known... issuance of the NPRM (76 FR 32105), June 3, 2011, as the FAA initially determined that the cost of the... Directives; Cessna Aircraft Company Airplanes; Initial Regulatory Flexibility Analysis AGENCY:...

  7. 75 FR 66700 - Airworthiness Directives; Cessna Aircraft Company (Cessna) Model 402C Airplanes Modified by...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-29

    ... Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska, and (4) Will... ``Docket No. FAA-2010-1084; Directorate Identifier 2010-CE-056-AD'' at the beginning of your comments. We... following new airworthiness directive (AD): Cessna Aircraft Company: Docket No. FAA-2010-1084;...

  8. 75 FR 17879 - Airworthiness Directives; The Cessna Aircraft Company Model 750 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-08

    ...-14817 (71 FR 65047, November 7, 2006), for all The Cessna Aircraft Company Model 750 airplanes. That AD...'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have... Amendment 39-14817 (71 FR 65047, November 7, 2006) and adding the following new AD: The Cessna...

  9. An overview of the Douglas Aircraft Company Aeroelastic Design Optimization Program (ADOP)

    NASA Technical Reports Server (NTRS)

    Dodd, Alan J.

    1989-01-01

    From a program manager's viewpoint, the history, scope and architecture of a major structural design program at Douglas Aircraft Company called Aeroelastic Design Optimization Program (ADOP) are described. ADOP was originally intended for the rapid, accurate, cost-effective evaluation of relatively small structural models at the advanced design level, resulting in improved proposal competitiveness and avoiding many costly changes later in the design cycle. Before release of the initial version in November 1987, however, the program was expanded to handle very large production-type analyses.

  10. Engine Company Evaluation of Feasibility of Aircraft Retrofit Water-Injected Turbomachines

    NASA Technical Reports Server (NTRS)

    Becker, Arthur

    2006-01-01

    This study supports the NASA Glenn Research Center and the U.S. Air Force Research Laboratory in their efforts to evaluate the effect of water injection on aircraft engine performance and emissions. In this study, water is only injected during the takeoff and initial climb phase of a flight. There is no water injection during engine start or ground operations, nor during climb, cruise, descent, or landing. This study determined the maintenance benefit of water injection during takeoff and initial climb and evaluated the feasibility of retrofitting a current production engine, the PW4062 (Pratt & Whitney, East Hartford, CT), with a water injection system. Predicted NO(x) emissions based on a 1:1 water-tofuel ratio are likely to be reduced between 30 to 60 percent in Environmental Protection Agency parameter (EPAP). The maintenance cost benefit for an idealized combustor water injection system installed on a PW4062 engine in a Boeing 747-400ER aircraft (The Boeing Company, Chicago, IL) is computed to be $22 per engine flight hour (EFH). Adding water injection as a retrofit kit would cost up to $375,000 per engine because of the required modifications to the fuel system and addition of the water supply system. There would also be significant nonrecurring costs associated with the development and certification of the system that may drive the system price beyond affordability.

  11. 76 FR 41142 - Special Conditions; Cessna Aircraft Company Model M680 Airplane; Lithium-ion Battery Installations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-13

    ... Aircraft Company Model M680 Airplane; Lithium-ion Battery Installations AGENCY: Federal Aviation... design feature associated with Lithium-ion batteries. The applicable airworthiness regulations do not...) T00012WI for installation of Lithium-ion batteries in the Model 680. The Model 680 is a twin-engine,...

  12. 75 FR 16514 - Cessna Aircraft Company, a Division of Textron, Inc., Including On-Site Leased Workers From...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-01

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF LABOR Employment and Training Administration Cessna Aircraft Company, a Division of Textron, Inc., Including On-Site Leased Workers From Express Professional Staffing, Formerly Known as Express Employment Professionals, Bend, OR; Amended Certification...

  13. Aircraft

    DOEpatents

    Hibbs, B.D.; Lissaman, P.B.S.; Morgan, W.R.; Radkey, R.L.

    1998-09-22

    This disclosure provides a solar rechargeable aircraft that is inexpensive to produce, is steerable, and can remain airborne almost indefinitely. The preferred aircraft is a span-loaded flying wing, having no fuselage or rudder. Travelling at relatively slow speeds, and having a two-hundred foot wingspan that mounts photovoltaic cells on most all of the wing`s top surface, the aircraft uses only differential thrust of its eight propellers to turn. Each of five sections of the wing has one or more engines and photovoltaic arrays, and produces its own lift independent of the other sections, to avoid loading them. Five two-sided photovoltaic arrays, in all, are mounted on the wing, and receive photovoltaic energy both incident on top of the wing, and which is incident also from below, through a bottom, transparent surface. The aircraft is capable of a top speed of about ninety miles per hour, which enables the aircraft to attain and can continuously maintain altitudes of up to sixty-five thousand feet. Regenerative fuel cells in the wing store excess electricity for use at night, such that the aircraft can sustain its elevation indefinitely. A main spar of the wing doubles as a pressure vessel that houses hydrogen and oxygen gases for use in the regenerative fuel cell. The aircraft has a wide variety of applications, which include weather monitoring and atmospheric testing, communications, surveillance, and other applications as well. 31 figs.

  14. Aircraft

    DOEpatents

    Hibbs, Bart D.; Lissaman, Peter B. S.; Morgan, Walter R.; Radkey, Robert L.

    1998-01-01

    This disclosure provides a solar rechargeable aircraft that is inexpensive to produce, is steerable, and can remain airborne almost indefinitely. The preferred aircraft is a span-loaded flying wing, having no fuselage or rudder. Travelling at relatively slow speeds, and having a two-hundred foot wingspan that mounts photovoltaic cells on most all of the wing's top surface, the aircraft uses only differential thrust of its eight propellers to turn. Each of five sections of the wing has one or more engines and photovoltaic arrays, and produces its own lift independent of the other sections, to avoid loading them. Five two-sided photovoltaic arrays, in all, are mounted on the wing, and receive photovoltaic energy both incident on top of the wing, and which is incident also from below, through a bottom, transparent surface. The aircraft is capable of a top speed of about ninety miles per hour, which enables the aircraft to attain and can continuously maintain altitudes of up to sixty-five thousand feet. Regenerative fuel cells in the wing store excess electricity for use at night, such that the aircraft can sustain its elevation indefinitely. A main spar of the wing doubles as a pressure vessel that houses hydrogen and oxygen gasses for use in the regenerative fuel cell. The aircraft has a wide variety of applications, which include weather monitoring and atmospheric testing, communications, surveillance, and other applications as well.

  15. 75 FR 78177 - Airworthiness Directives; Cessna Aircraft Company (Cessna) Model 172 Airplanes Modified by...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-15

    ... Aircraft Engines Service GmbH, Platanenstra e 14, D- 09350 Lichtenstein, Deutschland; telephone: +49 (37204... could lead to a loss of engine power. Relevant Service Information We reviewed Thielert Aircraft Engines...) Joint Aircraft System Component (JASC)/Air Transport Association (ATA) of America Code 72:...

  16. 76 FR 22298 - Airworthiness Directives; Cessna Aircraft Company (Cessna) Model 172 Airplanes Modified by...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-21

    .... ADDRESSES: For service information identified in this AD, contact Thielert Aircraft Engines Service GmbH... Bosch, Thielert Aircraft Engines GmbH, when referring to the airplane maintenance manual (AMM) and... Aircraft installing a backup battery system effective date of this AD) or Engines GmbH Service Bulletin...

  17. Transonic propulsion system integration analysis at McDonnell Aircraft Company

    NASA Technical Reports Server (NTRS)

    Cosner, Raymond R.

    1989-01-01

    The technology of Computational Fluid Dynamics (CFD) is becoming an important tool in the development of aircraft propulsion systems. Two of the most valuable features of CFD are: (1) quick acquisition of flow field data; and (2) complete description of flow fields, allowing detailed investigation of interactions. Current analysis methods complement wind tunnel testing in several ways. Herein, the discussion is focused on CFD methods. However, aircraft design studies need data from both CFD and wind tunnel testing. Each approach complements the other.

  18. Results of the independent radiological verification survey at the former Associate Aircraft Tool and Manufacturing Company site, Fairfield, Ohio (FOH001)

    SciTech Connect

    Rice, D.E.; Murray, M.E.; Brown, K.S.

    1996-01-01

    The former Associate Aircraft Tool and Manufacturing Company site is located at 3550 Dixie Highway, Fairfield, Ohio. Associate Aircraft Tool and Manufacturing Company produced hollow uranium slugs in a machine shop at the site in 1956. The work was performed for National Lead of Ohio in a contract with the Atomic Energy Commission to augment the capacity of the Feed Materials Production Center at Fernald in the development of nuclear energy for defense-related projects. The current occupant of the building, Force Control, operates a multipurpose machine shop. At the request of the US Department of Energy (DOE), a team from Oak Ridge National Laboratory conducted an independent radiological verification survey at the former Associate Aircraft Tool and Manufacturing Company Site, Fairfield, Ohio. The survey was performed from February to May of 1995. The purpose of the survey was to verify that radioactivity from residues of {sup 238}U was remediated to a level below acceptable DOE guidelines levels.

  19. Hearing status among aircraft maintenance personnel in a commercial airline company.

    PubMed

    Smedje, Greta; Lunden, Maria; Gärtner, Lotta; Lundgren, Håkan; Lindgren, Torsten

    2011-01-01

    The aim was to study subjective and objective hearing loss in a population of aircraft maintenance workers and identify predictors. A total of 327 aircraft maintenance personnel answered a self-administered work environment questionnaire (response rate 76%) and underwent audiometric test. The mean values for the hearing threshold at 3, 4, and 6 kHz for the ear with the most hearing loss were compared with a Swedish population database of persons not occupationally exposed to noise. Equivalent noise exposure during a working day was measured. Relationships between subjective and objective hearing loss and possible predictors (age, years of employment, self-reported exposure to solvents, blood pressure, and psycho-social factors) were analyzed by multiple logistic regression. At younger ages (<40 years), aircraft maintenance workers had higher hearing thresholds (1-3 dB) compared to the reference group, but such a difference was not found in older employees. Relationships were found between age and objective hearing loss, and between exposure to solvents and reported subjective hearing loss. Equivalent noise exposure during working days were 70-91 dB(A) with a maximal noise level of 119 dB(A). Aircraft maintenance workers are exposed to equivalent noise levels above the Swedish occupational standard, including some very high peak exposures. Younger employees have a higher age-matched hearing threshold level compared with a reference group. Thus, there is a need for further preventive measures.

  20. 77 FR 25953 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Removal of the 1980...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-02

    ... AGENCY 40 CFR Part 52 Approval and Promulgation of Air Quality Implementation Plans; Maryland; Removal of the 1980 Consent Order for the Maryland Slag Company AGENCY: Environmental Protection Agency (EPA... submitted by the Maryland Department of Environment to revise the Maryland State Implementation Plan...

  1. Baltimore, Maryland

    NASA Technical Reports Server (NTRS)

    2002-01-01

    This Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) image of Baltimore was acquired on April 4, 2000, and covers an area of 17 by 20 km. Combining green, red, and near-infrared light to create a false-color composite, the image shows vegetation as red, water as blue, and urban areas as grey. Baltimore is the largest city in Maryland and one of the busiest ports in the United States. Its economy focuses on research and development, especially in the areas of aquaculture, pharmaceuticals, and medical supplies and services. Before European settlement, the site of Baltimore was inhabited by Native Americans of the Susquehannock tribe. The town was founded in 1729 and named for the barons Baltimore, the British founders of the Maryland Colony. In one week (January 28, 2001), the Baltimore Ravens will play the New York Giants in Super Bowl XXXV, the championship game of the National Football League (NFL). NASA/GSFC/MITI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team

  2. Results of the radiological survey at the former Associate Aircraft Tool and Manufacturing Company site, Fairfield, Ohio (FOH001)

    SciTech Connect

    Murray, M.E.; Carrier, R.F.; Mathis, R.A.

    1993-03-01

    At the request of the US Department of Energy (DOE), a team from oak Ridge National Laboratory conducted a radiological survey of the former Associate Aircraft Tool and Manufacturing Company facility, Fairfield, Ohio. The survey was performed in July and September 1992. The purpose of the survey was to determine if the facility had become contaminated with residuals containing radioactive materials during the work performed under government contract from February to September, 1956. The survey included gamma scanning over a circumscribed area around and outside of the building, and gamma scanning over most accessible indoor floor surfaces as well as the collection of soil and other samples for radionuclide analyses. Roof trusses were beta-gamma scanned in locations where floor contamination was found. Results of the survey demonstrated radionuclide concentrations in indoor and outdoor samples, and radiation measurements over floor and overhead surfaces, in excess of the DOE Formerly Utilized Sites Remedial Action Program guidelines. Elevated uranium concentrations outdoors were limited to several small, isolated spots. Radiation measurements exceeded guidelines indoors over numerous spots and areas inside the building, mainly in the areas that had been used in the early government work.

  3. 2007 Maryland Adolescent Survey

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2008

    2008-01-01

    Periodically, Maryland's sixth, eighth, tenth, and twelfth graders are surveyed to determine the nature, extent, and trend of alcohol, tobacco, and other drug (ATOD) use among adolescents. The "2007 Maryland Adolescent Survey (MAS)" presents the latest findings regarding ATOD use by Maryland's adolescents and compares State and local findings with…

  4. 76 FR 32103 - Airworthiness Directives; Cessna Aircraft Company 310, 320, 340, 401, 402, 411, 414, and 421...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-03

    ... ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will... certificated aircraft mechanic must fabricate the additional placard and install both of these placards. The... properly certificated aircraft mechanic. Costs of Compliance We estimate that this proposed AD affects...

  5. Consolidated, multimedia environmental review and licensing of a landfill gas combustion/electrical generation system in Maryland

    SciTech Connect

    Goldstein, D.R.; Brown, D.H.; Ross, J.B.; Mountain, P.D.

    1999-07-01

    To build a power plant or transmission line in the State of Maryland, a company must obtain a Certificate of Public Convenience and Necessity (CPCN) from the Maryland Public Service Commission (PSC). As part of this licensing process, applicants must address a full range of environmental, engineering, socioeconomic, planning, need, and cost issues. The CPCN constitutes permission to construct and operate the facility, and includes issuance of the required air quality and water appropriations permits. The Maryland Power Plant Research Program (PPRP) serves as the lead agency for the consolidated review of CPCN projects. A recent project in Maryland involved the beneficial use of collected landfill gas from a closed municipal solid waste landfill for the generation of up to 4 Megawatts (MW) of electricity. This electrical generation will be continuously fed into the existing transmission system under a power purchase agreement with the local power company. The project is unique is several aspects: the use of former Rolls Royce aircraft engines fitted with generator sets to produce electricity; the beneficial reuse of landfill gas which is currently being flared at the landfill; and the collaborative environmental review that was conducted for this project that resulted in a streamlined licensing approach. This paper will include: a description of the landfill gas combustion/electrical generation system; an explanation of the review process conducted for the project including New Source Review, ambient air impacts assessed through air dispersion modeling, noise generation impacts, and ecological impacts; background on power plant licensing in Maryland; and a discussion of how the collaborative approach led by PPRP proved to be proactive and environmentally beneficial.

  6. 7. VIEW OF PARKWAY WINDING THROUGH CHEVERLY, MARYLAND. MARYLAND HIGHWAY ...

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

    7. VIEW OF PARKWAY WINDING THROUGH CHEVERLY, MARYLAND. MARYLAND HIGHWAY 450 (ANNAPOLIS ROAD) UNDERPASS IN BACKGROUND. VIEW NW. (Lowe) - Baltimore-Washington Parkway, Greenbelt, Prince George's County, MD

  7. Maryland: La Plata

    Atmospheric Science Data Center

    2014-05-15

    article title:  Tornado Cuts Through La Plata, Maryland     View Larger Image A category F4 tornado tore through La Plata, Maryland on April 28, 2002, killing 5 and ... illustrates the strip of flattened vegetation left by the tornado. The lower image was acquired by MISR's nadir (vertical-viewing) ...

  8. Databook: Maryland Community Colleges.

    ERIC Educational Resources Information Center

    Maryland State Board for Community Colleges, Annapolis.

    Designed to provide information about the current status and future direction of Maryland's community college system, this report offers a summary and overview of all aspects of community college functioning in the state. Section I provides an organizational chart of higher education in Maryland; and data on undergraduate credit enrollments, and…

  9. Derivation of residual radioactive material guidelines for uranium in soil at the Former Associate Aircraft Tool and Manufacturing Company Site, Fairfield, Ohio

    SciTech Connect

    Faillace, E.R.; Nimmagadda, M.; Yu, C.

    1995-01-01

    Residual radioactive material guidelines for uranium in soil were derived for the former Associate Aircraft Tool and Manufacturing Company site in Fairfield, Ohio. This site has been identified for remedial action under the U.S. Department of Energy`s (DOE`s) Formerly Utilized Sites Remedial Action Program (FUSRAP). Single-nuclide and total-uranium guidelines were derived on the basis of the requirement that, after remedial action, the 50-year committed effective dose equivalent to a hypothetical individual living or working in the immediate vicinity of the site should not exceed (1) 30 mrem/yr for the current-use and likely future-use scenarios or (2) 100 mrem/yr for less likely future-use scenarios. The DOE residual radioactive material (RESRAD) computer code, which implements the methodology described in the DOE manual for establishing residual radioactive material guidelines, was used in this evaluation.

  10. Downtown Hancock, Maryland (L to R): National Pike, Western Maryland ...

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

    Downtown Hancock, Maryland (L to R): National Pike, Western Maryland Rail Trail (milepost 115), C&O Canal, and Potomac River, looking east. - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

  11. VIEW OF SOUTHEASTERN INTERIOR SPACE, FACING NORTHWEST. Douglas Aircraft ...

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

    VIEW OF SOUTHEASTERN INTERIOR SPACE, FACING NORTHWEST. - Douglas Aircraft Company Long Beach Plant, Aircraft Parts Shipping & Receiving Building, 3855 Lakewood Boulevard, Long Beach, Los Angeles County, CA

  12. VIEW OF CENTRAL INTERIOR SPACE, FACING NORTHEAST. Douglas Aircraft ...

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

    VIEW OF CENTRAL INTERIOR SPACE, FACING NORTHEAST. - Douglas Aircraft Company Long Beach Plant, Aircraft Parts Shipping & Receiving Building, 3855 Lakewood Boulevard, Long Beach, Los Angeles County, CA

  13. Juvenile Justice in Maryland.

    ERIC Educational Resources Information Center

    Vetter, Donald P.; Frederick, Charles

    This four part guide provides secondary students with information about Maryland laws, courts, and legal system. The first section examines the nature and causes of increasing involvement of youth in crime, and identifies those crimes most commonly committed by juveniles. A special section on shoplifting is included. Section II examines the nature…

  14. Maryland and SREB

    ERIC Educational Resources Information Center

    Southern Regional Education Board (SREB), 2009

    2009-01-01

    The Southern Regional Education Board (SREB) is a nonprofit organization that works collaboratively with Maryland and 15 other member states to improve education at every level--from pre-K to postdoctoral study--through many effective programs and initiatives. SREB's "Challenge to Lead" Goals for Education, which call for the region to lead the…

  15. Seymour: Maryland's Information Retriever.

    ERIC Educational Resources Information Center

    Smith, Barbara G.

    1994-01-01

    Explains the development of an electronic information network in Maryland called Seymour that offers bibliographic records; full-text databases; community information databases; the ability to request information and materials; local, state, and federal information; and access to the Internet. Policy issues are addressed, including user fees and…

  16. Maryland Adolescent Survey, 1994.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore. Div. of Compensatory Education and Support Services.

    This report details the latest findings from the biennial Maryland Adolescent Survey of the extent and trends in alcohol, tobacco, and drug use among students. To permit comparisons with national findings and trends, the form and content of survey items parallel those of the annual national study "Monitoring the Future," conducted by the…

  17. The Marxist vs. Maryland.

    ERIC Educational Resources Information Center

    Daniloff, Nicholas

    1978-01-01

    The case of Bertell Ollman, who was denied a University of Maryland department chairmanship and who contends it was due to his Marxist beliefs, is described. Ollman is invoking the Fourteenth Amendment to protect his First Amendment rights to free speech and to hold employment regardless of his political convictions. (LBH)

  18. Maryland Reading First.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore.

    In years past, Maryland has provided little guidance toward adoption and implementation of Scientifically Based Reading Research (SBRR) programs. Only recently, with the implementation of the Comprehensive School Reform Demonstration program and the Reading Excellence Act (REA) program, have schools or local education agencies been required to…

  19. Maryland Department of Education

    ERIC Educational Resources Information Center

    Council of Chief State School Officers, Washington, DC.

    This document traces the historical development of the Maryland Department of Education from the first notable efforts to establish free schooling in 1825 to the present. An introductory section briefly sketches early development of a centralized system and the establishment of a state board in 1870. "From 1900 to World War I" focuses on the…

  20. 7. INTERIOR, ROBERTS AND SCHAEFER SHAKER TABLE (LEFT), MARYLAND NEW ...

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

    7. INTERIOR, ROBERTS AND SCHAEFER SHAKER TABLE (LEFT), MARYLAND NEW RIVER COAL COMPANY INSTALLED APRON CONVEYOR (RIGHT) USED TO CONVEY COAL TO THE BELKNAP CHORIDE WASHER, RETURN CHUTE FOR CLEANED COAL (FAR RIGHT), AND COAL STORAGE SILO (BACKGROUND), LOOKING WEST - Nuttallburg Mine Complex, Tipple, North side of New River, 2.7 miles upstream from Fayette Landing, Lookout, Fayette County, WV

  1. 17 CFR 256.310 - Aircraft and airport equipment.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 17 Commodity and Securities Exchanges 3 2010-04-01 2010-04-01 false Aircraft and airport equipment... UTILITY HOLDING COMPANY ACT OF 1935 Service Company Property Accounts § 256.310 Aircraft and airport equipment. This account shall include the delivered cost of all service company owned aircraft...

  2. 17 CFR 256.310 - Aircraft and airport equipment.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 17 Commodity and Securities Exchanges 3 2011-04-01 2011-04-01 false Aircraft and airport equipment... UTILITY HOLDING COMPANY ACT OF 1935 Service Company Property Accounts § 256.310 Aircraft and airport equipment. This account shall include the delivered cost of all service company owned aircraft...

  3. Maryland Early Head Start Initiative

    ERIC Educational Resources Information Center

    Center for Law and Social Policy, Inc. (CLASP), 2012

    2012-01-01

    Since 2000, Maryland has provided state supplemental funds to Head Start and Early Head Start (EHS) programs to improve access. Local EHS programs may use funds, through child care partnerships, to extend the EHS day or year. Maryland's approach to building on EHS includes: (1) Increase the capacity of existing Head Start and EHS programs to…

  4. Maryland's Achievements in Public Education, 2011

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2011

    2011-01-01

    This report presents Maryland's achievements in public education for 2011. Maryland's achievements include: (1) Maryland's public schools again ranked #1 in the nation in Education Week's 2011 Quality Counts annual report; (2) Maryland ranked 1st nationwide for a 3rd year in a row in the percentage of public school students scoring 3 or higher on…

  5. Tornado Strikes Southern Maryland

    NASA Technical Reports Server (NTRS)

    2002-01-01

    Evening light catches the tops of towering thunderheads over the Mid-Atlantic states on April 28, 2002. The powerful storms spawned several tornados, one of which was classified as an F4 tornado. The powerful tornado touched down in the southern Maryland town of La Plata, destroying most of the historic downtown. The twister-one of the strongest ever to hit the state-beat a 24-mile swath running west to east through the state and claimed at least three lives. The image above was taken by the Geostationary Operational Environmental Satellite (GOES) at 7:15 PM Eastern Daylight Savings Time. A large version of the animation shows more detail. (5.9 MB Quicktime) Image courtesy National Oceanic and Atmospheric Administration (NOAA) and the GOES Project Science Office. Animation by Robert Simmon, NASA GSFC.

  6. Rim Dispute Explodes in Maryland.

    ERIC Educational Resources Information Center

    Hartmann, Bennie C.

    1984-01-01

    This article reviews the history of Maryland's controversial requirement that school buses use single-piece wheel rims. The author suggests precautions for using explosion-prone multipiece rims. (MCG)

  7. 47 CFR 32.2113 - Aircraft.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false Aircraft. 32.2113 Section 32.2113... FOR TELECOMMUNICATIONS COMPANIES Instructions for Balance Sheet Accounts § 32.2113 Aircraft. This account shall include the original cost of aircraft and any associated equipment and furnishings...

  8. 47 CFR 32.2113 - Aircraft.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false Aircraft. 32.2113 Section 32.2113... FOR TELECOMMUNICATIONS COMPANIES Instructions for Balance Sheet Accounts § 32.2113 Aircraft. This account shall include the original cost of aircraft and any associated equipment and furnishings...

  9. 47 CFR 32.6113 - Aircraft expense.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false Aircraft expense. 32.6113 Section 32.6113... FOR TELECOMMUNICATIONS COMPANIES Instructions for Expense Accounts § 32.6113 Aircraft expense. (a) This account shall include such costs as aircraft fuel, flight crews, mechanics and ground...

  10. 47 CFR 32.6113 - Aircraft expense.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false Aircraft expense. 32.6113 Section 32.6113... FOR TELECOMMUNICATIONS COMPANIES Instructions for Expense Accounts § 32.6113 Aircraft expense. (a) This account shall include such costs as aircraft fuel, flight crews, mechanics and ground...

  11. 47 CFR 32.2113 - Aircraft.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false Aircraft. 32.2113 Section 32.2113... FOR TELECOMMUNICATIONS COMPANIES Instructions for Balance Sheet Accounts § 32.2113 Aircraft. This account shall include the original cost of aircraft and any associated equipment and furnishings...

  12. 47 CFR 32.2113 - Aircraft.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false Aircraft. 32.2113 Section 32.2113... FOR TELECOMMUNICATIONS COMPANIES Instructions for Balance Sheet Accounts § 32.2113 Aircraft. This account shall include the original cost of aircraft and any associated equipment and furnishings...

  13. 47 CFR 32.6113 - Aircraft expense.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false Aircraft expense. 32.6113 Section 32.6113... FOR TELECOMMUNICATIONS COMPANIES Instructions for Expense Accounts § 32.6113 Aircraft expense. (a) This account shall include such costs as aircraft fuel, flight crews, mechanics and ground...

  14. 47 CFR 32.6113 - Aircraft expense.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Aircraft expense. 32.6113 Section 32.6113... FOR TELECOMMUNICATIONS COMPANIES Instructions for Expense Accounts § 32.6113 Aircraft expense. (a) This account shall include such costs as aircraft fuel, flight crews, mechanics and ground...

  15. 47 CFR 32.6113 - Aircraft expense.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false Aircraft expense. 32.6113 Section 32.6113... FOR TELECOMMUNICATIONS COMPANIES Instructions for Expense Accounts § 32.6113 Aircraft expense. (a) This account shall include such costs as aircraft fuel, flight crews, mechanics and ground...

  16. 47 CFR 32.2113 - Aircraft.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Aircraft. 32.2113 Section 32.2113... FOR TELECOMMUNICATIONS COMPANIES Instructions for Balance Sheet Accounts § 32.2113 Aircraft. This account shall include the original cost of aircraft and any associated equipment and furnishings...

  17. Libraries in Maryland: MedlinePlus

    MedlinePlus

    ... this page: https://medlineplus.gov/libraries/maryland.html Libraries in Maryland To use the sharing features on ... Anne Arundel Medical Center Joyce C. Miller, Medical Library 2001 Medical Parkway Annapolis, MD 21401 443-481- ...

  18. Maryland Handbook on the Accountability Assessment Program.

    ERIC Educational Resources Information Center

    Research Triangle Inst., Durham, NC. Center for Educational Research and Evaluation.

    Article 77, Section 28a, of the Annotated Code of the Laws of Maryland, commonly called the Maryland Educational Accountability Program (MAAP), was passed in 1972 by the Maryland General Assembly. This act should insure when properly implemented, that educational programs: (1) lead to the attainment of established educational objectives, (2)…

  19. 77 FR 76586 - Maryland Disaster #MD-00024

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-28

    ... ADMINISTRATION Maryland Disaster MD-00024 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a Notice of the Presidential declaration of a major disaster for the State of Maryland (FEMA... Economic Injury Loans): Somerset. ] Contiguous Counties (Economic Injury Loans Only): Maryland:...

  20. State of Maryland Emergency Preparedness Planning Guide for Maryland Schools.

    ERIC Educational Resources Information Center

    Maryland Emergency Management Agency, Pikesville, MD.

    Guidelines to help local school systems in Maryland develop a comprehensive emergency plan and to increase student awareness are offered in this handbook. Following the introduction, chapter 1 outlines the roles of all participants in emergency planning and response. Chapter 2 describes the process for preparing an emergency plan, including…

  1. MD State Profile. Maryland: Maryland High School Assessment (HSA)

    ERIC Educational Resources Information Center

    Center on Education Policy, 2010

    2010-01-01

    This paper provides information about Maryland's High School Assessment, an end-of-course exam tied to content standards. The purpose of the exam is to: (1) Determine prospective high school graduates' knowledge and skill levels relative to those needed for entry-level employment; (2) Determine prospective high school graduates' knowledge and…

  2. La Plata, Maryland

    NASA Technical Reports Server (NTRS)

    2002-01-01

    On Sunday, April 28, a category F5 tornado cut an East-West path through La Plata, Maryland, killing 5 and injuring more than 100. These two images acquired by NASA's Terra satellite Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) show a 6-by-17.8-kilometer (3.7-by-11.1-mile) area centered on the town. The top image was acquired on May 12, 2001, and the bottom on May 3, 2002. The bands used for the image portray vegetation in red, and bare fields and urban areas in blue-green. The dark turquoise swath cutting across the 2002 image is the track of the tornado, where the vegetation was ripped up and removed.

    With its 14 spectral bands from the visible to the thermal infrared wavelength region, and its high spatial resolution of 15 to 90 meters(about 50 to 300 feet), ASTER will image Earth for the next six years to map and monitor the changing surface of our planet.

    ASTER is one of five Earth-observing instruments launched December 18,1999, on NASA's Terra satellite. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and the data products. Dr. Anne Kahle at NASA's Jet Propulsion Laboratory, Pasadena, Calif., is the U.S. science team leader; Bjorn Eng of JPL is the project manager. The Terra mission is part of NASA's Earth Science Enterprise, a long-term research effort dedicated to understanding and protecting our home planet. Through the study of Earth, NASA will help to provide sound science to policy and economic decision makers so as to better life here, while developing the technologies needed to explore the universe and search for life beyond our home planet.

    The broad spectral coverage and high spectral resolution of ASTER will provide scientists in numerous disciplines with critical information for surface mapping and monitoring dynamic conditions and temporal change. Example applications are: monitoring

  3. 78 FR 61388 - TA-W-82,705, the Boeing Company Boeing Commercial Aircraft, (BCA) Including On-Site Leased...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-03

    ... Register on July 2, 2013 (78 FR 39775). At the request of a company official and union, the Department...) Including On-Site Leased Workers From Chipton Ross, Inc., CTS Technical Services, Inc., Moseley Technical... Workers From Adecco, USA, Inc., Cascade Engineering, CDI Corporation, Chipton Ross, Inc.,...

  4. Aircraft Contrails

    NASA Technical Reports Server (NTRS)

    1992-01-01

    Captured in this scene is a series of aircraft contrails in a high traffic region over the northern Gulf of Mexico (27.0N, 85.5W). Contrails are caused by the hot engine exhaust of high flying aircraft interacting with moisture in the cold upper atmosphere and are common occurrances of high flying aircraft.

  5. 76 FR 10899 - Decision To Evaluate a Petition To Designate a Class of Employees From the W.R. Grace and Company...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-28

    ... Company in Curtis, MD, To Be Included in the Special Exposure Cohort AGENCY: National Institute for... class of employees from the W.R. Grace and Company in Curtis, Maryland, to be included in the Special... evaluation, is as follows: Facility: W.R. Grace and Company. Location: Curtis, Maryland. Job Titles...

  6. Disruptive Youth Programs in Maryland.

    ERIC Educational Resources Information Center

    Walters, Peggy G.

    This document describes the work of the Pupil Services Branch of the Maryland State Department of Education in its efforts to assist school districts and individual schools in the state in examining the causes of student disruption and in developing programs that are aimed at impacting disruptive students and creating more effective schools. A…

  7. MARYLAND AGRICULTURE AND YOUR WATERSHED

    EPA Science Inventory



    Using primarily 1995 State of Maryland agricultural statistics data, a new methodology was demonstrated with which State natural resource managers can analyze the areal extent of agricultural lands and production data on a watershed basis. The report organized major crop ...

  8. Renewable Energy Alternatives in Maryland.

    ERIC Educational Resources Information Center

    Welsh, Greg E.; McClellan, Deborah A. S.

    This handbook discusses the renewable energy resources suitable for use in Maryland. It follows a question and answer format with sections about the following alternative renewable energy sources; solar, wind, wood, water, bio-gas/methane, and geothermal. Each section includes a list of recommended readings, appropriate agencies or organizations,…

  9. School Finance in Maryland, 1995.

    ERIC Educational Resources Information Center

    McLoone, Eugene P.

    This paper presents an overview of legislative developments and policy debates that occurred in Maryland during 1994-95 and their effects on school finance. These developments include: (1) the election, by a narrow margin, of a new Democratic governor who promised to restore state cuts in educational expenditures; (2) the increase of…

  10. 77 FR 25901 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Removal of the 1980...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-02

    .... Background The Maryland Slag Company (now MultiServ) operates a blast furnace slag processing plant at the... County. Hot metal slag from Bethlehem Steel's blast furnace that is not processed by the Atlantic Cement... October 31, 1980 Consent Order was approved as a SIP revision by EPA on September 8, 1981 (41 FR...

  11. Aircraft Design

    NASA Technical Reports Server (NTRS)

    Bowers, Albion H. (Inventor); Uden, Edward (Inventor)

    2016-01-01

    The present invention is an aircraft wing design that creates a bell shaped span load, which results in a negative induced drag (induced thrust) on the outer portion of the wing; such a design obviates the need for rudder control of an aircraft.

  12. Subgroup Achievement and Gap Trends: Maryland, 2010

    ERIC Educational Resources Information Center

    Center on Education Policy, 2010

    2010-01-01

    This paper profiles the student subgroup achievement and gap trends in Maryland for 2010. In grade 8 (the only grade in which subgroup trends were analyzed by achievement level), Maryland had data for racial/ethnic subgroups, low income students, and boys and girls at the proficient and advanced levels. The percentage of students reaching the…

  13. 75 FR 79063 - Maryland Disaster #MD-00014

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-17

    ... ADMINISTRATION Maryland Disaster MD-00014 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a notice of an Administrative declaration of a disaster for the State of Maryland dated 12/09... CONTACT: A. Escobar, Office of Disaster Assistance, U.S. Small Business Administration, 409 3rd Street,...

  14. 76 FR 77579 - Maryland Disaster #MD-00017

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-13

    ... ADMINISTRATION Maryland Disaster MD-00017 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a notice of an Administrative declaration of a disaster for the State of Maryland, dated 12/07... INFORMATION CONTACT: A. Escobar, Office of Disaster Assistance, U.S. Small Business Administration, 409...

  15. Maryland Community Colleges Continuing Education Manual.

    ERIC Educational Resources Information Center

    Maryland State Board for Community Colleges, Annapolis.

    This manual outlines Maryland's community college course evaluation system for continuing education courses. Part I provides a historical overview of continuing education in Maryland, including the legal provisions establishing the development of continuing education courses as a function of community college instructional development. Part II…

  16. Maryland Higher Education Commission Trend Book, 2003.

    ERIC Educational Resources Information Center

    Maryland State Higher Education Commission, Annapolis.

    This document presents an assortment of statistical data about higher education in Maryland. The information is presented for a period of years, so that trends can be highlighted. The book is organized by topic into these sections: (1) factors affecting enrollment, including college-going rate of Maryland high school seniors, their intended major,…

  17. [English Instruction in Maryland Community Colleges].

    ERIC Educational Resources Information Center

    Klink, William

    This paper reviews a 1974 tabulation of freshman English programs made by the Maryland Association of Departments of English. Of 20 schools surveyed, including almost all the Maryland community colleges, 15 offer remedial courses, 18 have remediation facilities, and 15 grant academic credit for remedial courses. All of the colleges have regular…

  18. Maryland: Sailing into the Electronic Future.

    ERIC Educational Resources Information Center

    Smith, Barbara G., Ed.

    1996-01-01

    Describes information technology programs in Maryland, including the Sailor Project, that created a statewide telecommunications network providing Internet access without charge from libraries, homes, offices, schools, and shopping malls; University of Maryland initiatives; distance learning in higher education; and a project that allows worldwide…

  19. Maryland's Library Public Awareness Campaign for CTE

    ERIC Educational Resources Information Center

    Gilli, Lynne M.; Lohnes, Marjorie R.

    2011-01-01

    Career and technical education (CTE) has grown and changed tremendously over the past 20 years. While great strides have been made in upgrading CTE in Maryland, many parents, students, policymakers and community members were not familiar with the "new and improved" CTE. In a bid to spread the word about the "new and improved" CTE in Maryland, a…

  20. Maryland School Assessment Results Continue to Improve

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2009

    2009-01-01

    The Maryland School Assessment (MSA) is administered annually to students in grades 3-8 in reading and math. MSA data are used to meet federal No Child Let Behind (NCLB) requirements. This paper presents how Maryland students' reading and mathematics MSA scores continued to improve in 2009, and the achievement gaps among special services and…

  1. 75 FR 9005 - Maryland Disaster #MD-00011

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-26

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION Maryland Disaster MD-00011 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY... the State of Maryland (FEMA- 1875-DR), dated 02/19/2010. Incident: Severe Winter Storm and...

  2. 77 FR 71666 - Maryland Disaster #00025

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-03

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION Maryland Disaster 00025 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This... State of Maryland (FEMA-- 4091--DR), dated 11/20/2012. Incident: Hurricane Sandy. Incident Period:...

  3. 76 FR 59478 - Maryland Disaster #MD-00016

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-26

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION Maryland Disaster MD-00016 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY... State of Maryland (FEMA- 4034-DR), dated 09/16/2011. Incident: Hurricane Irene. Incident Period:...

  4. 77 FR 48197 - Maryland Disaster #MD-00021

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-13

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION Maryland Disaster MD-00021 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY... State of Maryland (FEMA- 4075-DR), dated 08/02/2012. Incident: Severe storms and straight-line...

  5. 75 FR 44236 - Exelon Generation Company, LLC; Notice of Dispute Resolution Process Schedule, Panel Meeting and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-28

    ... Energy Regulatory Commission Exelon Generation Company, LLC; Notice of Dispute Resolution Process... Department of the Environment (Maryland DOE) filed a Notice to initiate formal study dispute resolution... March 5, 2010, Commission staff denied Maryland DOE's request for formal study dispute resolution....

  6. Metropolitan Edison Company switching and tagging procedure

    SciTech Connect

    Slater, H.J.

    1980-05-01

    Metropolitan Edison Company provides service to over 350,000 customers in an area diagonally across Southeastern Pennsylvania from North of Stroudsburg near the New York State line to the Maryland border South of Gettysburg. This area encompasses 3300 square miles, 7% of Pennsylvania, and includes all or part of 14 counties. Dispatching organization, safety factors, tagging list and switching are discussed.

  7. Maryland's efforts to develop regulations creating an air emissions offset trading program

    SciTech Connect

    Guy, D.M.; Zaw-Mon, M.

    1999-07-01

    Under the federal Clean Air Act's New Source Review program, many companies located in or planning to locate in areas that do not meet federal air quality standards or in the Northeast Ozone Transport Region (northern Virginia to Maine) must obtain emission reductions (called offsets) of volatile organic compounds and nitrogen oxides that are greater than the new emissions that will be released. This offset requirement allows growth in industry while protecting air quality against deterioration. Despite the federal offset requirement, a formal banking and trading program is not mandated by the Clean Air Act Amendments of 1990. Still, a mechanism is needed to ensure that emission reduction credits (ERCs) are available for sources to use to meet the offset requirement. Currently, Maryland does not have regulations covering the sale or transfer of ERCs from one facility to another. Maryland works with industry on a case-by-case basis to identify potential sources of ERCs and to assist in obtaining them. Then, the offset requirement and the ERCs used to meet the offsets are incorporated into individual permits using various permitting mechanisms. Desiring certainty and stability in the banking and trading process, Maryland's business community has pressed for regulations to formalize Maryland's procedures. Working over several years through a stakeholder process, Maryland has developed concepts for a trading program and a draft regulation. This paper describes Maryland's current case-by-case banking and trading procedure and traces efforts to develop a regulation to formalize the process. The paper discusses complex policy issues related to establishing a banking and trading program, describes the principal elements of Maryland's draft regulation, and summarizes elements of other states' emissions banking and trading programs.

  8. Mapping Atlantic coastal marshlands, Maryland, Georgia, using ERTS-1 imagery

    NASA Technical Reports Server (NTRS)

    Anderson, R. R.; Carter, V. L.; Mcginness, J. W., Jr.

    1973-01-01

    Eastern coastal marshes are the most extensive and productive in the United States. A relatively low cost, moderately accurate method is needed to map these areas for management and protection. Groundbased and low-altitude aircraft methods for mapping are time-consuming and quite expensive. The launch of NASA's Earth Resources Technology Satellite has provided an opportunity to test the feasibility of mapping wetlands using small scale imagery. The test sites selected were in Chesapeake Bay, Maryland, and Ossabaw Island, Georgia. Results of the investigation indicate that the following may be ascertained from ERTS imagery, enlarged to 1:250,000: (1) upper wetland boundary; (2) drainage pattern in the wetland; (3) plant communities; (4) ditching activities associated with agriculture; and (5) lagooning for water-side home development. Conclusions are that ERTS will be an excellent tool for many types of coastal wetland mapping.

  9. Project report: Aircraft

    SciTech Connect

    Wuebbles, D.J.; Baughcum, S.; Metwally, M.; Seals, R.

    1994-04-01

    Analyses of scenarios of past and possible future emissions are an important aspect of assessing the potential environmental effects from aircraft, including the proposed high speed civil transport (HSCT). The development of a detailed three-dimensional database that accurately represents the integration of all aircraft emissions along realistic flight paths for such scenarios requires complex computational modeling capabilities. Such a detailed data set is required for the scenarios evaluated in this interim assessment. Within the NASA High-Speed Research Program, the Emissions Scenarios Committee provides a forum for identifying the required scenarios and evaluating the resulting database being developed with the advanced emissions modeling capabilities at the Boeing Company and McDonnell Douglas Corporation.

  10. Maryland's Top 25 Demand Healthcare Occupations: Projected Demand and Reported Supply Provided by Maryland Higher Education Institutions.

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2004

    2004-01-01

    This report compares the demand for qualified healthcare workers in Maryland and the supply provided by Maryland higher education institutions. It identifies: (1) Maryland?s top 25 demand healthcare occupations, and (2) any gaps between the supply and demand for these 25 healthcare occupations. Additional information on each healthcare occupation…

  11. Optimization in fractional aircraft ownership

    NASA Astrophysics Data System (ADS)

    Septiani, R. D.; Pasaribu, H. M.; Soewono, E.; Fayalita, R. A.

    2012-05-01

    Fractional Aircraft Ownership is a new concept in flight ownership management system where each individual or corporation may own a fraction of an aircraft. In this system, the owners have privilege to schedule their flight according to their needs. Fractional management companies (FMC) manages all aspects of aircraft operations, including utilization of FMC's aircraft in combination of outsourced aircrafts. This gives the owners the right to enjoy the benefits of private aviations. However, FMC may have complicated business requirements that neither commercial airlines nor charter airlines faces. Here, optimization models are constructed to minimize the number of aircrafts in order to maximize the profit and to minimize the daily operating cost. In this paper, three kinds of demand scenarios are made to represent different flight operations from different types of fractional owners. The problems are formulated as an optimization of profit and a daily operational cost to find the optimum flight assignments satisfying the weekly and daily demand respectively from the owners. Numerical results are obtained by Genetic Algorithm method.

  12. Response of SO2 and particulate air pollution to local and regional emission controls: A case study in Maryland

    NASA Astrophysics Data System (ADS)

    He, Hao; Vinnikov, Konstantin Y.; Li, Can; Krotkov, Nickolay A.; Jongeward, Andrew R.; Li, Zhanqing; Stehr, Jeffrey W.; Hains, Jennifer C.; Dickerson, Russell R.

    2016-04-01

    This paper addresses the questions of what effect local regulations can have on pollutants with different lifetimes and how surface observations and remotely sensed data can be used to determine the impacts. We investigated the decadal trends of tropospheric sulfur dioxide (SO2) and aerosol pollution over Maryland and its surrounding states, using surface, aircraft, and satellite measurements. Aircraft measurements indicated fewer isolated SO2 plumes observed in summers, a ˜40% decrease of column SO2, and a ˜20% decrease of atmospheric optical depth (AOD) over Maryland after the implementation of local regulations on sulfur emissions from power plants (˜90% reduction from 2010). Surface observations of SO2 and particulate matter (PM) concentrations in Maryland show similar trends. OMI SO2 and MODIS AOD observations were used to investigate the column contents of air pollutants over the eastern U.S.; these indicate decreasing trends in column SO2 (˜60% decrease) and AOD (˜20% decrease). The decrease of upwind SO2 emissions also reduced aerosol loadings over the downwind Atlantic Ocean near the coast by ˜20%, while indiscernible changes of the SO2 column were observed. A step change of SO2 emissions in Maryland starting in 2009-2010 had an immediate and profound benefit in terms of local surface SO2 concentrations but a modest impact on aerosol pollution, indicating that short-lived pollutants are effectively controlled locally, while long-lived pollutants require regional measures.

  13. Aircraft cybernetics

    NASA Technical Reports Server (NTRS)

    1977-01-01

    The use of computers for aircraft control, flight simulation, and inertial navigation is explored. The man-machine relation problem in aviation is addressed. Simple and self-adapting autopilots are described and the assets and liabilities of digital navigation techniques are assessed.

  14. Politics of protest: people and strip mining in Western Maryland

    SciTech Connect

    Finnissey, J.C. Jr.

    1987-01-01

    The problem considered was that given the widespread grievances against strip mining in Western Maryland, what accounted for the lack of authoritative decisions being made within the State Capital to remedy the situation. This problem was studied from a power prospective. A power relationship may exist where there is a suppression of grievances through nondecision-making and thus there is an absence of both overt conflict and grievances. Cases were documented where the ownership or control of strip mining companies by absentee interests was masked. The strip-mining industry has portrayed itself as being local. Consequently, the fact that the area is being drained of its coal wealth is a nonissue, thwarting the possible enactment of ameliorative legislation requiring that the profits obtained by absentee interests be reinvested in businesses in the area, providing much longed for employment. The Citizens' Coalition on Surface Mining has attempted to organize the mountaineers in protesting against strip mining, and placing grievances on the political agenda for amelioration. The prospect for change in the short-term appeared dim given the indifference in the State Capital as evident in the lack or inadequate enforcement of existing regulations by state authorities; the indirect influence which the strip mining interests are perceived to have over legislators from the area and the retainer of a lobbyist by the Maryland Coal.

  15. Episodic water chemistry changes in a western Maryland watershed

    SciTech Connect

    Morgan, R.P.; Murray, C.K.; Eshleman, K.N.

    1994-05-01

    The purpose of the project was to obtain water chemistry data for the Big Run watershed located in Garrett County, Maryland in order to evaluate the impact of acidification on streams in western Maryland.

  16. Curve of Western Maryland Rail Trail west of Hancock, milepost ...

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

    Curve of Western Maryland Rail Trail west of Hancock, milepost 117 vicinity, looking west. - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

  17. Cresap House, built 1764 in Old Town, Maryland, with WM ...

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

    Cresap House, built 1764 in Old Town, Maryland, with WM right-of-way at left, looking east. - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

  18. Western Maryland Scenic Railroad tracks on Bridge No. 1655, Tenth ...

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

    Western Maryland Scenic Railroad tracks on Bridge No. 1655, Tenth Potomac Crossing, looking SW toward West Virginia. - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

  19. 35. NORTH END OF BALTIMOREWASHINGTON PARKWAY, WHERE MARYLAND HIGHWAY 295, ...

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

    35. NORTH END OF BALTIMORE-WASHINGTON PARKWAY, WHERE MARYLAND HIGHWAY 295, "THE BALTIMORE-WASHINGTON EXPRESSWAY," BEGINS, MARYLAND HIGHWAY 175 IN BACKGROUND. VIEWN. - Baltimore-Washington Parkway, Greenbelt, Prince George's County, MD

  20. South portal of Culvert No. 1508 in Old Town, Maryland, ...

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

    South portal of Culvert No. 1508 in Old Town, Maryland, looking north. - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

  1. Aerial view of Williamsport, Maryland (clockwise from bottom): Chesapeake & ...

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

    Aerial view of Williamsport, Maryland (clockwise from bottom): Chesapeake & Ohio (C&O) Canal Conococheague Aqueduct (HAER MD-123), Cushwa Basin, US 11 Bridge, Western Maryland (WM) Chesapeake & Ohio Canal Lift Bridge (HAER MD-23), Potomac Edison Power Plant, looking southeast. A short spur connected the power plant to the Western Maryland mainline west of Hagerstown. - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

  2. Impacts of Title IV in Maryland

    SciTech Connect

    Sherwell, J.; Ellis, H.; Corio, L.; Seinfelt, J.

    1995-12-31

    The Maryland Department of Natural Resources` Power Plant Research Program has evaluated the environmental effects of acid deposition on Maryland`s air, land, water (especially the Chesapeake Bay), and human resources since the mid-1980`s. Title IV of the Clean Air Act Amendments of 1990 (CAAA90) has focused much attention on the mandated reductions of nitrogen oxides (NO{sub x}) and sulfur dioxide (SO{sub 2}) to control acid deposition. Baseline data on acidic deposition and air emissions/pollution control for NO{sub x} and SO{sub 2} acquired through PPRP studies have proved useful in evaluating the impacts of Title IV on Maryland power plants and resources. Three example programs are discussed: The first is an evaluation of SO{sub 2} emissions on ecosystems through the use of critical loads--the amount of acid rain that an ecosystem can tolerate without continuing to acidify. Results support the use of broadly based emissions trading scenarios: The second study is an evaluation of the potential for reducing nitrate loading in the Chesapeake Bay by reducing NO{sub x} emissions. Results indicate substantial NO{sub x} emission reductions could offer significant reductions in nitrate deposition to the Bay: The final study is a review of the impacts of Title IV on the Maryland coal industry and the prospects for coal cleaning and advanced combustion technologies. Current results indicate that Maryland coal will meet Phase 2 SO{sub 2} emission standards using advanced combustion techniques, such as fluidized bed technologies, but that additional emissions controls, such as a scrubber would be required in a conventional boiler.

  3. 76 FR 70528 - Maryland Disaster Number MD-00018

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-14

    ... ADMINISTRATION Maryland Disaster Number MD-00018 AGENCY: U.S. Small Business Administration. ACTION: Amendment 2... Only for the State of Maryland (FEMA-4038-DR), dated 10/05/2011 . Incident: Remnants of Tropical Storm... Private Non-Profit organizations in the State of Maryland, dated 10/05/2011, is hereby amended to...

  4. 78 FR 11725 - Maryland Disaster Number MD-00024

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-19

    ... ADMINISTRATION Maryland Disaster Number MD-00024 AGENCY: U.S. Small Business Administration. ACTION: Amendment 1... Maryland (FEMA-4091-DR), dated 12/14/ 2012. Incident: Hurricane Sandy. Incident Period: 10/26/2012 through... the President's major disaster declaration for the State of Maryland, dated 12/14/2012 is...

  5. 75 FR 20400 - Maryland Disaster Number MD-00011

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-19

    ... ADMINISTRATION Maryland Disaster Number MD-00011 AGENCY: U.S. Small Business Administration. ACTION: Amendment 1... Only for the State of MARYLAND (FEMA-1875-DR), dated 02/19/2010. Incident: Severe Winter Storm and... Private Non-Profit organizations in the State of Maryland, dated 02/19/2010, is hereby amended to...

  6. 76 FR 70527 - Maryland Disaster Number MD-00018

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-14

    ... ADMINISTRATION Maryland Disaster Number MD-00018 AGENCY: U.S. Small Business Administration. ACTION: Amendment 1... Only for the State of Maryland (FEMA-4038-DR), dated 10/05/2011. Incident: Remnants of Tropical Storm... disaster declaration for Private Non-Profit organizations in the State of Maryland, dated 10/05/2011,...

  7. 77 FR 74908 - Maryland Disaster Number MD-00025

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-18

    ... ADMINISTRATION Maryland Disaster Number MD-00025 AGENCY: U.S. Small Business Administration. ACTION: Amendment 1... Only for the State of MARYLAND (FEMA-4091-DR), dated 11/20/2012. Incident: Hurricane Sandy. Incident... Non-Profit organizations in the State of MARYLAND, dated 11/20/2012, is hereby amended to include...

  8. 75 FR 9426 - Maryland; Major Disaster and Related Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-02

    ... SECURITY Federal Emergency Management Agency Maryland; Major Disaster and Related Determinations AGENCY... declaration of a major disaster for the State of Maryland (FEMA-1875-DR), dated February 19, 2010, and related... have determined that the damage in certain areas of the State of Maryland resulting from a...

  9. 77 FR 71813 - Maryland; Major Disaster and Related Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-04

    ... SECURITY Federal Emergency Management Agency Maryland; Major Disaster and Related Determinations AGENCY... declaration of a major disaster for the State of Maryland (FEMA-4091-DR), dated November 20, 2012, and related... follows: I have determined that the damage in certain areas of the State of Maryland resulting...

  10. 78 FR 3496 - Maryland Disaster Number MD-00025

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-16

    ... ADMINISTRATION Maryland Disaster Number MD-00025 AGENCY: U.S. Small Business Administration. ACTION: Amendment 3... Only for the State of Maryland (FEMA-4091-DR), dated 11/20/2012. Incident: Hurricane Sandy. Incident... Non-Profit organizations in the State of Maryland, dated 11/20/2012, is hereby amended to include...

  11. 77 FR 76587 - Maryland Disaster Number MD-00025

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-28

    ... ADMINISTRATION Maryland Disaster Number MD-00025 AGENCY: U.S. Small Business Administration. ACTION: Amendment 2... Only for the State of Maryland (FEMA-4091-DR), dated 11/20/2012. Incident: Hurricane Sandy. Incident... Non-Profit organizations in the State of Maryland, dated 11/20/2012, is hereby amended to include...

  12. 76 FR 67245 - Maryland Disaster Number MD-00016

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-31

    ... ADMINISTRATION Maryland Disaster Number MD-00016 AGENCY: U.S. Small Business Administration. ACTION: Amendment 1... Only for the State of Maryland (FEMA-4034-DR), dated 09/16/2011. Incident: Hurricane Irene. Incident... Non-Profit organizations in the State of Maryland, dated 09/16/2011, is hereby amended to include...

  13. Educating with Aircraft Models

    ERIC Educational Resources Information Center

    Steele, Hobie

    1976-01-01

    Described is utilization of aircraft models, model aircraft clubs, and model aircraft magazines to promote student interest in aerospace education. The addresses for clubs and magazines are included. (SL)

  14. Rotor systems research aircraft airplane configuration flight-test results

    NASA Technical Reports Server (NTRS)

    Painter, W. D.; Erickson, R. E.

    1984-01-01

    The Rotor Systems Research Aircraft (RSRA) has been undergoing ground and flight tests by Ames Research Center since late 1979, primarily as a compound aircraft. The purpose was to train pilots and to check out and develop the design flight envelope established by the Sikorsky Aircraft Company. This paper reviews the preparation and flight test of the RSRA in the airplane, or fixed-wing, configuration and discusses the results of that test.

  15. Resin transfer molding for advanced composite primary aircraft structures

    NASA Technical Reports Server (NTRS)

    Markus, Alan; Palmer, Ray

    1991-01-01

    Resin Transfer Molding (RTM) has been identified by Douglas Aircraft Company (DAC) and industry to be one of the promising processes being developed today which can break the cost barrier of implementing composite primary structures into a commercial aircraft production environment. The RTM process developments and scale-up plans Douglas Aircrart will be conducting under the NASA ACT contract are discussed.

  16. 78 FR 2707 - Maryland Disaster # MD-00026

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-14

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION Maryland Disaster MD-00026 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY... Deadline Date: 10/02/2013. ADDRESSES: Submit completed loan applications to: U.S. Small...

  17. The Maryland Youth Suicide Prevention School Program.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore.

    The Maryland State Department of Education developed this framework for a suicide prevention program. The program framework addresses the following goals: (1) increase awareness among school personnel and community awareness among school personnel and community leaders of the incidence of teenage suicide; (2) train school personnel in individual…

  18. State Education Finance and Governance Profile: Maryland

    ERIC Educational Resources Information Center

    Carter, Emily

    2010-01-01

    This article provides information on Maryland's state education finance and governance. The state provides a foundation funding program, which guarantees a minimum or foundation level of per-pupil expenditures for children in all the state's school systems; this is done through a combination of state aid and local revenue. In 2002, Maryland…

  19. Maryland Community Colleges Instructional Program Manual.

    ERIC Educational Resources Information Center

    Maryland State Board for Community Colleges, Annapolis.

    Guidelines are presented for consideration in the development, review, submission, and approval of all new instructional programs in the Maryland Community Colleges (MCC). The first section of the manual explains: (1) operational definitions for transfer and occupational programs; (2) the five-year state plan listing; (3) letters of intent and…

  20. Maryland: A Geographic Study for Elementary Students.

    ERIC Educational Resources Information Center

    Fitzhugh, William P.

    This paper shows comparisons among the Chesapeake Bay region of Maryland, the Murray River region of South Australia, and the Rio de la Plata region of Uruguay. Through comparative geography, students are to draw their own conclusions about the similarities and differences of the three regions. Teachers are encouraged to use other resources to aid…

  1. 1981 Maryland Migrant Education State Plan.

    ERIC Educational Resources Information Center

    Friend, Ronn E.; Gates, Francis W.

    Between October 1, 1980 and September 30, 1981, the 1981 migrant education program will serve an estimated 1,109 migrant children in 6 regular and 8 summer school projects in Maryland. Of these children, 422 will be at the elementary level, 366 at the secondary level, and the rest will be in preschool. Blacks compose the largest ethnic group (478)…

  2. Mental Health and Mental Illness in Maryland.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Health and Mental Hygiene, Baltimore.

    Statistics of mental illness in Maryland are provided in the areas of diagnostic distribution of admissions and resident patients, size and nature of patient population, percentage change in daily cost per patient, employee-patient ratios, length of hospitalization, diagnostic treatment trends, patient mortality, and Baltimore's specific problems…

  3. 40 CFR 81.321 - Maryland.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... List of CFR Sections Affected which appears in the Finding Aids section of the printed volume and at... County AQCR 112 Central Maryland Intrastate Unclassifiable/Attainment Frederick County AQCR 113... Frederick County Nonattainment 3/25/03 Severe Montgomery County Nonattainment 3/25/03 Severe Prince...

  4. State Summary of Maryland. Ed Watch Online.

    ERIC Educational Resources Information Center

    Education Trust, Washington, DC.

    This report provides data on the academic achievement gap that separates low-income and minority students from other students, examining how well different groups of students perform in Maryland and noting inequities in teacher quality, course offerings, and funding. Included are tables and data that provide: a frontier gap analysis (a comparison…

  5. State Teacher Policy Yearbook, 2009. Maryland

    ERIC Educational Resources Information Center

    National Council on Teacher Quality, 2009

    2009-01-01

    The Maryland edition of the National Council on Teacher Quality's (NCTQ's) 2009 "State Teacher Policy Yearbook" is the third annual look at state policies impacting the teaching profession. It is hoped that this report will help focus attention on areas where state policymakers can make changes that will have a positive impact on teacher quality…

  6. Maryland Community Colleges 1985 Program Evaluations.

    ERIC Educational Resources Information Center

    Maryland State Board for Community Colleges, Annapolis.

    As part of an annual statewide evaluation process, quantitative information on community college education is reviewed by the Maryland State Board for Community Colleges. Subsequently, in particular cases, a qualitative assessment is conducted by individual colleges in response to specific questions raised by the Board. This report provides the…

  7. Strategic Plan for Maryland Community Colleges.

    ERIC Educational Resources Information Center

    Maryland State Board for Community Colleges, Annapolis.

    Building upon previous plans and reports developed by the Maryland State Board for Community Colleges (MSBCC), this strategic plan identifies the possibilities that face the MSBCC and the community college system. After describing the statewide planning process for community colleges, the report provides an overview of higher education in…

  8. 77 FR 1430 - Maryland Regulatory Program

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-10

    ..., Appalachian Region. BILLING CODE 4310-05-P ... INFORMATION: On January 28, 2011, (76 FR 5103) we published a proposed rule to Maryland's program... regulation, Regulation .08 under COMAR 26.20.24, Special Performance Standards. On March 20, 2011, (76...

  9. 76 FR 13112 - Maryland Regulatory Program

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-10

    ... January 28, 2011, (76 FR 5103) we published a proposed rule that would revise the Maryland program. The... generation, storage, handling, processing, disposal, recycling, beneficial use, or other use of CCBs within... establish requirements pertaining to the generation, storage, handling, processing, disposal,...

  10. 76 FR 5103 - Maryland Regulatory Program

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-28

    ... Register (47 FR 7214-7217). You can also find later actions concerning the Maryland program and program... pertaining to the generation, storage, handling, processing, disposal, recycling, beneficial use, or other... requirements pertaining to the generation, storage, handling, processing, disposal, recycling, beneficial...

  11. 76 FR 64421 - Maryland Disaster #MD-00018

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-18

    ... ADMINISTRATION Maryland Disaster MD-00018 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a Notice of the Presidential declaration of a major disaster for Public Assistance Only for the... Disaster Assistance, U.S. Small Business Administration, 409 3rd Street, SW., Suite 6050, Washington,...

  12. 75 FR 27010 - Maryland Disaster #MD-00012

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-13

    ... ADMINISTRATION Maryland Disaster MD-00012 AGENCY: Small Business Administration. ACTION: Notice. SUMMARY: This is a Notice of the Presidential declaration of a major disaster for Public Assistance Only for the... Disaster Assistance, U.S. Small Business Administration, 409 3rd Street, SW., Suite 6050, Washington,...

  13. Maryland Community Colleges 1980 Program Evaluations.

    ERIC Educational Resources Information Center

    Maryland State Board for Community Colleges, Annapolis.

    This report contains qualitative evaluations of 48 programs throughout the Maryland community college system, as well as a statewide evaluation of Teacher Education transfer programs. A summary of the Teacher Education programs is presented first, in which the purpose and role of teacher education in the community college, enrollment trends,…

  14. Maryland's Yankee Friend--George Peabody, Esq.

    ERIC Educational Resources Information Center

    Parker, Franklin

    1994-01-01

    One of several articles on George Peabody examines his history as a self-made millionaire, focusing on his years working in Maryland and the cultural legacy that he left the state (including the Peabody Institute of Baltimore, Johns Hopkins University, Peabody Conservatory of Music, and Peabody Library of Baltimore). (SM)

  15. Preventive therapy for tuberculosis in Maryland.

    PubMed

    Rabindran, E; Matuszak, D L; Israel, E; Woodall, H; Highsmith, H; Flynn, J

    1991-09-01

    Maryland data substantiate the safety of isoniazid therapy in preventing tuberculosis. To eradicate tuberculosis in the U.S., private physicians must play an active role by offering preventive therapy to patients at high risk of developing the disease. PMID:1921656

  16. Staff Investment Pays Dividends in Maryland District

    ERIC Educational Resources Information Center

    Gewertz, Catherine

    2005-01-01

    In the past few years, Viers Mill Elementary School's home-grown leadership team has overseen a striking rise in test scores, especially among its substantial minority population. The school, located in Montgomery County, Maryland, exemplifies the district's strategy of using its human-resources operations as a lever to improve student…

  17. 76 FR 23846 - Virginia Electric Power Company, LLC, North Anna Power Station, Unit No. 1; Exemption

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-28

    ... FR 39285). This exemption is effective upon issuance. Dated at Rockville, Maryland this 21st day of... COMMISSION Virginia Electric Power Company, LLC, North Anna Power Station, Unit No. 1; Exemption 1.0 Background Virginia Electric Power Company (VEPCO, the licensee) is the holder of Facility Operating...

  18. Smart Companies.

    ERIC Educational Resources Information Center

    Galagan, Patricia A.

    1997-01-01

    Capturing and leveraging knowledge is an important new management trend that is as yet undefined. Some companies are accounting for their intellectual capital and applying it to the company balance sheets. (JOW)

  19. Aircraft Electric Secondary Power

    NASA Technical Reports Server (NTRS)

    1983-01-01

    Technologies resulted to aircraft power systems and aircraft in which all secondary power is supplied electrically are discussed. A high-voltage dc power generating system for fighter aircraft, permanent magnet motors and generators for aircraft, lightweight transformers, and the installation of electric generators on turbine engines are among the topics discussed.

  20. World commercial aircraft accidents

    SciTech Connect

    Kimura, C.Y.

    1993-01-01

    This report is a compilation of all accidents world-wide involving aircraft in commercial service which resulted in the loss of the airframe or one or more fatality, or both. This information has been gathered in order to present a complete inventory of commercial aircraft accidents. Events involving military action, sabotage, terrorist bombings, hijackings, suicides, and industrial ground accidents are included within this list. Included are: accidents involving world commercial jet aircraft, world commercial turboprop aircraft, world commercial pistonprop aircraft with four or more engines and world commercial pistonprop aircraft with two or three engines from 1946 to 1992. Each accident is presented with information in the following categories: date of the accident, airline and its flight numbers, type of flight, type of aircraft, aircraft registration number, construction number/manufacturers serial number, aircraft damage, accident flight phase, accident location, number of fatalities, number of occupants, cause, remarks, or description (brief) of the accident, and finally references used. The sixth chapter presents a summary of the world commercial aircraft accidents by major aircraft class (e.g. jet, turboprop, and pistonprop) and by flight phase. The seventh chapter presents several special studies including a list of world commercial aircraft accidents for all aircraft types with 100 or more fatalities in order of decreasing number of fatalities, a list of collision accidents involving commercial aircrafts, and a list of world commercial aircraft accidents for all aircraft types involving military action, sabotage, terrorist bombings, and hijackings.

  1. Task Force on the Education of Maryland's African-American Males

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2006

    2006-01-01

    On June 9, 2003, the Task Force on the Education of Maryland's African-American Males was convened by the Maryland K-16 Leadership Council (chaired by the University System of Maryland Chancellor William E. Kirwan, former Maryland Acting Secretary of Higher Education John A. Sabatini, Jr., and Maryland State Superintendent of Schools Nancy S.…

  2. Aircraft-crash-protected roof design for the European SBWR

    SciTech Connect

    Posta, B.A.; Kadar, I.; Rao, A.S.

    1995-12-31

    The European utility requirement document (EURD) places significant emphasis on aircraft crash protection of the reactor building - Alternative concepts were evaluated for protecting the dry-well head and the fuel pool from the effect of the spalling concrete for the General Electric Company`s European simplified boiling water reactor (ESBWR) designs.

  3. Propulsion controlled aircraft computer

    NASA Technical Reports Server (NTRS)

    Cogan, Bruce R. (Inventor)

    2010-01-01

    A low-cost, easily retrofit Propulsion Controlled Aircraft (PCA) system for use on a wide range of commercial and military aircraft consists of an propulsion controlled aircraft computer that reads in aircraft data including aircraft state, pilot commands and other related data, calculates aircraft throttle position for a given maneuver commanded by the pilot, and then displays both current and calculated throttle position on a cockpit display to show the pilot where to move throttles to achieve the commanded maneuver, or is automatically sent digitally to command the engines directly.

  4. FROM THE MOUNTAINS TO THE SEA: THE STATE OF MARYLAND'S FRESHWATER STREAMS

    EPA Science Inventory

    The Maryland Biological Stream Survey, conducted by the Maryland Department of Natural Resources, sampled about 1,000 randomly-selected sites on first through third order freshwater streams throughout Maryland from 1995 to 1997. Biota (fish, benthic macroinvertebrates, herpetofau...

  5. 75 FR 54084 - Southern Maryland Electric Cooperative: Notice of Availability of an Environmental Assessment

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-03

    ...; ] DEPARTMENT OF AGRICULTURE Rural Utilities Service Southern Maryland Electric Cooperative: Notice of... possible financial assistance for a proposed project by Southern Maryland Electric Cooperative (SMECO), with headquarters in Hughesville, Maryland. The proposal consists of the construction of a 30-mile...

  6. Nexus EnergyHomes, Frederick, Maryland (Fact Sheet)

    SciTech Connect

    Not Available

    2014-02-01

    With this new home - which achieved the highest rating possible under the National Green Building Standard - Nexus EnergyHomes demonstrated that green and affordable can go hand in hand. The mixed-humid climate builder, along with the U.S. Department of Energy Building America team Partnership for Home Innovation, embraced the challenge to create a new duplex home in downtown Frederick, Maryland, that successfully combines affordability with state-of-the-art efficiency and indoor environmental quality. To limit costs, the builder designed a simple rectangular shape and kept interesting architectural features such as porches outside the building's structure. This strategy avoided the common pitfall of creating potential air leakage where architectural features are connected to the structure before the building is sealed against air infiltration. To speed construction and limit costs, the company chose factory-assembled components such as structural insulated panel walls and floor and roof trusses. Factory-built elements were key in achieving continuous insulation around the entire structure. Open-cell spray foam at the rim joist and attic roofline completed the insulation package, and kept the heating, ventilating, and air-conditioning system in conditioned space.

  7. Effectiveness of mitigation measures with constructed forested wetlands in Maryland

    USGS Publications Warehouse

    Perry, M.C.

    1997-01-01

    Intensive research on six constructed forested wetlands in Central Maryland was conducted in 1993-1996 to determine success of these habitats as functional forested wetlands for wildlife. Areas studied ranged in size from 2 to 35 acres and were constructed by private companies under contract with three mitigation agencies. Adjacent natural forested wetlands were used as reference sites where similar data were collected. Based on data from the first four years of this study it appears that it will take 35-50 years before these areas have forested wetland vegetation and wildlife similar to that found on mature forested wetlands. This long-time period is based on the high mortality and slow growth of nursery-stock trees and shrubs transplanted on the areas. Mortality and slow growth resulted mostly from excessive surface water on the sites. The level of ground water did not appear to be a factor in regard to transplant mortality. Green ash was the woody transplant species that had the least mortality. Sampling of vegetative ground cover with one-meter square quadrats showed the predominance of grasses and herbs. [abridged abstract

  8. Maryland 2000. Journal of the Maryland Association for Institutional Research, 1993.

    ERIC Educational Resources Information Center

    Clagett, Craig A., Ed.; Huntington, Robin B., Ed.

    1993-01-01

    This volume offers nine papers on higher education research in Maryland all of which were presented at annual meetings from 1990 through 1993. The following papers are included: (1) "The Geo-Demographic Approach to Student Recruitment: The PG-TRAK90" Lifestyle Cluster System" (Karl Boughan); (2) "Evaluating College Services: A QUEST for…

  9. Metal concentrations in Maryland`s shellfish: 1970s--1990s

    SciTech Connect

    Murphy, D.L.

    1995-12-31

    Maryland has been monitoring arsenic, cadmium, chromium, copper, lead, mercury and zinc in bivalve shellfish from state waters since the 1960s. The primary bivalve species monitored in Maryland waters are the oyster, Crassostrea virginica and the softshell clam, Mya arenaria. These data have been evaluated for temporal trends. In order to insure that temporal evaluations be based upon data produced using comparable analytical methods, the time period evaluated is not the same for all analytes. For example, while most evaluations are for the period 1974 through 1994, arsenic data were evaluated for the period 1980 through 1994. Data for oyster tissue indicate declines in levels of mercury, cadmium, arsenic, copper and zinc on the order of 70--90%. The major portion of these reductions occurred prior to 1985. These declines are evident from data collected from Maryland`s lower eastern shore, a relatively remote area, as well as from waters closer to larger population centers. Past detection levels for lead and chromium were insufficiently low to detect temporal changes.

  10. Grade 4: Maryland--Geography. Maryland--History of the Colonial Period.

    ERIC Educational Resources Information Center

    Allegany County Board of Education, Cumberland, MD.

    The curriculum guide presents a working draft of the fourth grade component of a K-6 social studies program using the expanding environments approach which was developed by the Allegany County Board of Education in Maryland. The overall objective is to help teachers assist their students in gaining the understanding needed to deal with the…

  11. Unmanned aircraft systems

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Unmanned platforms have become increasingly more common in recent years for acquiring remotely sensed data. These aircraft are referred to as Unmanned Airborne Vehicles (UAV), Remotely Piloted Aircraft (RPA), Remotely Piloted Vehicles (RPV), or Unmanned Aircraft Systems (UAS), the official term used...

  12. Innovations in Aircraft Design

    NASA Technical Reports Server (NTRS)

    1997-01-01

    The Boeing 777 carries with it basic and applied research, technology, and aerodynamic knowledge honed at several NASA field centers. Several Langley Research Center innovations instrumental to the development of the aircraft include knowledge of how to reduce engine and other noise for passengers and terminal residents, increased use of lightweight aerospace composite structures for increased fuel efficiency and range, and wind tunnel tests confirming the structural integrity of 777 wing-airframe integration. Test results from Marshall Space Flight Center aimed at improving the performance of the Space Shuttle engines led to improvements in the airplane's new, more efficient jet engines. Finally, fostered by Ames Research Center, the Boeing 777 blankets that protect areas of the plane from high temperatures and fire have a lineage to Advanced Flexible Reusable Surface Insulation used on certain areas of the Space Shuttle. According to Boeing Company estimates, the 777 has captured three-quarters of new orders for airplanes in its class since the program was launched.

  13. Sun powered aircraft design

    NASA Technical Reports Server (NTRS)

    Maccready, P. B.; Lissaman, P. B. S.; Morgan, W. R.; Burke, J. D.

    1981-01-01

    Two piloted aircraft have been developed and flown powered solely by photovoltaic cells in a program sponsored by the DuPont Company. The 30.8-kg (68-lb), 21.6-m (71-ft) span, Gossamer Penguin was used as a solar test bed, making a 2.6-km (1.6-mile) flight in August 1980. The 88.1-kg (194-lb), 14.3-m (47-ft) span Solar Challenger was developed for long flights in normal turbulence. Stressed to +9 G, it utilizes Kevlar, Nomex honeycomb-graphite sandwich wall tubes, expanded polystyrene foam ribs, and Mylar skin. With a 54.9-kg (121-lb) airframe, 33.1-kg (73-lb) propulsion system, and a 45.4-kg (100-lb) pilot, it flies on 1400 watts. In summer, the projected maximum climb is 1.0 m/s (200 ft/min) at 9,150 m (30,000 ft). Sixty purely solar-powered flights were made during winter 1980-1981. Using thermals, 1,070 m (3,500 ft) was reached with 115-minute duration.

  14. Clinical nurse specialist regulation: the Maryland experience.

    PubMed

    Thurman, Paul

    2015-01-01

    High-quality care will continue to be a driver in the evolution of today's health care environment. Ensuring effective, cost-conscious, quality care is the core of clinical nurse specialist (CNS) practice. The CNS practice varies by state, depending on each state's Nurse Practice Act. Some states have separate scopes of practice for CNSs, including prescriptive authority, whereas some states do not recognize CNS practice as different from the practice of the registered nurse. The journey to state recognition and title protection for the CNS role in the state of Maryland is described. PMID:25594481

  15. University of Maryland annual progress report

    SciTech Connect

    Mignerey, A.C.

    1995-02-01

    The two main areas of research of intermediate energy heavy-ion reactions and ultrarelativistic heavy-ion reactions are presented in this report. Among the intermediate energy research topics were {sup 129}Xe reactions, calibration of the plastic elements in the Maryland Forward Array, and a cluster recognition model for treating BUU-generated distributions. The ultrarelativistic energy research program included the LED system for the NMA (New Multiplicity Array) in E866 at BNL AGS, the E866 collaboration (antiprotons and NMA), and PHOBOS magnet work. {sup 139}La reactions were also studied.

  16. Occurrence of Trypanosoma cruzi in Maryland

    USGS Publications Warehouse

    Herman, C.M.; Bruce, J.I.

    1962-01-01

    During 1954-1960, 2005 mammals of 18 species collected at the Patuxent Wildlife Research Center, Maryland, were examined for trypanosomes. T. cruzi was found in 10 raccoons between October 31 and November 30. Infection occurred in 2 percent of all raccoons sampled, and in 11.3 percent of the 80 raccoons sampled in November. Examination was by direct smears, stained smears and cultures of heart blood. Although, in previous studies, at least two experimentally infected raccoons exhibited extended parasitemia (14 and 8 weeks), no such continuing parasitemia was observed in the natural infections. No trypanosomes were found in any of the other mammals examined.

  17. FISHERY-ORIENTED MODEL OF MARYLAND OYSTER POPULATIONS

    EPA Science Inventory

    We used time series data to calibrate a model of oyster population dynamics for Maryland's Chesapeake Bay. Model parameters were fishing mortality, natural mortality, recruitment, and carrying capacity. We calibrated for the Maryland bay as a whole and separately for 3 salinity z...

  18. Directory of Public Libraries in Maryland, 1995-96.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore. Div. of Library Development and Services.

    This document is a directory of public libraries in the state of Maryland. Agencies which cooperate with public libraries, such as Cooperating Libraries of Central Maryland, State Library Resource Center, and Public Libraries and State Networking Branch, are also listed. The library entries are arranged alphabetically by county, beginning with…

  19. Maryland Report Card: 2008 Performance Report. State and School Systems

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2008

    2008-01-01

    This paper presents the 2008 Maryland School Performance Report. It shows the academic performance results of the State and its 24 school systems. This report includes the results from the Maryland School Assessment (MSA) given in spring 2008, information about the Adequate Yearly Progress (AYP) measures required by the federal No Child Left…

  20. Howard County Public High School Graduates at Maryland Campuses.

    ERIC Educational Resources Information Center

    Howard Community Coll., Columbia, MD. Office of Planning and Evaluation.

    This report presents results on the number of Maryland high school graduates who attend Howard Community College (HCC). The number of recent public high school graduates showing up at HCC increased from 384 (spring 1992 graduates) to 443 (spring 1997 graduates). HCC's share of the students who attend college in Maryland has ranged from 36-42% with…

  1. Maryland Public Charter Schools Model Policy and Resource Guide

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2005

    2005-01-01

    This document is designed to guide local boards of education and school systems in Maryland in assisting individuals and organizations interested in establishing public charter schools. This guide is organized into the following parts: (1) Maryland Public Charter Schools Act; (2) Organizing to Assist Public Charter School Development; (3)…

  2. 76 FR 60851 - Maryland; Emergency and Related Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-30

    ... SECURITY Federal Emergency Management Agency Maryland; Emergency and Related Determinations AGENCY: Federal Emergency Management Agency, DHS. ACTION: Notice. SUMMARY: This is a notice of the Presidential declaration of an emergency for the State of Maryland (FEMA-3335-EM), dated August 27, 2011, and...

  3. 77 FR 69643 - Maryland; Emergency and Related Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-20

    ... SECURITY Federal Emergency Management Agency Maryland; Emergency and Related Determinations AGENCY: Federal Emergency Management Agency, DHS. ACTION: Notice. SUMMARY: This is a notice of the Presidential declaration of an emergency for the State of Maryland (FEMA-3349-EM), dated October 28, 2012, and...

  4. General Education Standards for Speech Communication in Maryland Higher Education.

    ERIC Educational Resources Information Center

    Engleberg, Isa N.

    On September 26, 1998, the Maryland Communication Association unanimously approved the "Standards for General Education Speech Communication Courses in Maryland Higher Education Institutions." On February 10, 1999, the state's intersegmental Chief Academic Officers (CAO) group endorsed the standards for inclusion in their "Guiding Principles for…

  5. Shaping Educational Policy in Maryland: Teacher Education Reform and Beyond.

    ERIC Educational Resources Information Center

    Hinkle, Dennis E.; Proffitt, Thomas D.; Pilato, Virginia H.; Rosenthal, Michael

    Maryland's teacher education reform began in 1991, when the Maryland Higher Education Council (MHEC) charged a task force with recommending a comprehensive approach to educating teachers that combined a solid foundation in academic preparation with promising developments in professional practice. The task force report recommended a 4+1 model for…

  6. Is It Time to Rethink Teacher Pensions in Maryland?

    ERIC Educational Resources Information Center

    Podgursky, Michael

    2006-01-01

    Many states are struggling to finance under-funded teacher pension systems as well as recruit and retain a high-quality teaching workforce. This paper compares Maryland's former (prior to Spring, 2006) teacher pension system to those in Pennsylvania and several other states. On the basis of simple replacement rates, the former Maryland state plan…

  7. 76 FR 63318 - Maryland; Major Disaster and Related Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-12

    ... DEPARTMENT OF HOMELAND SECURITY Federal Emergency Management Agency Maryland; Major Disaster and Related... Presidential declaration of a major disaster for the State of Maryland (FEMA-4034-DR), dated September 16, 2011... Act''), as follows: I have determined that the damage in certain areas of the State of...

  8. The Western Maryland Rail Trail passes high above the canal ...

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

    The Western Maryland Rail Trail passes high above the canal and behind the surviving remains of the Round Top cement works, milepost 120, looking northwest. - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

  9. Western Maryland (WM) crossing the Potomac River where it connected ...

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

    Western Maryland (WM) crossing the Potomac River where it connected with the Baltimore & Ohio (B&O) Railroad at Cherry Run, West Virginia, looking west. - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

  10. Professional Salary Schedules, Maryland Public Schools 1998-99.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education. Baltimore. Div. of Planning, Results and Information Management.

    The tables in this document provide information about the professional salaries for the Maryland public schools in 1998-99. The following tables are included: (1) "Salaries for Selected Twelve-Month Administrative Positions"; (2) "Salary Range for Ten-Month Teachers"; (3) "Salary Schedules for Maryland Public School Teachers with a Bachelor's…

  11. Aircraft landing gear systems

    NASA Technical Reports Server (NTRS)

    Tanner, John A. (Editor)

    1990-01-01

    Topics presented include the laboratory simulation of landing gear pitch-plane dynamics, a summary of recent aircraft/ground vehicle friction measurement tests, some recent aircraft tire thermal studies, and an evaluation of critical speeds in high-speed aircraft. Also presented are a review of NASA antiskid braking research, titanium matrix composite landing gear development, the current methods and perspective of aircraft flotation analysis, the flow rate and trajectory of water spray produced by an aircraft tire, and spin-up studies of the Space Shuttle Orbiter main gear tire.

  12. Small transport aircraft technology

    NASA Technical Reports Server (NTRS)

    Williams, L. J.

    1983-01-01

    Information on commuter airline trends and aircraft developments is provided to upgrade the preliminary findings of a NASA-formed small transport aircraft technology (STAT) team, established to determine whether the agency's research and development programs could help commuter aircraft manufacturers solve technical problems related to passenger acceptance and use of 19- to 50-passenger aircraft. The results and conclusions of the full set of completed STAT studies are presented. These studies were performed by five airplane manufacturers, five engine manufacturers, and two propeller manufacturers. Those portions of NASA's overall aeronautics research and development programs which are applicable to commuter aircraft design are summarized. Areas of technology that might beneficially be expanded or initiated to aid the US commuter aircraft manufacturers in the evolution of improved aircraft for the market are suggested.

  13. The Faculty Role in Campus Governance. Proceedings of a Statewide Conference in Maryland (Catonsville, Maryland, October 1983).

    ERIC Educational Resources Information Center

    Sumler, David E., Ed.

    Proceedings of a conference in Maryland on the faculty role in college governance are presented. A survey was conducted in 1982 to discover how faculty members at Maryland colleges and universities contribute to decision-making on their individual campuses. Following the survey, the statewide conference was held to discuss the results. The survey…

  14. Maryland Child Care Choices Study: Changes in Child Care Arrangements of Young Children in Maryland. Publication #2014-57

    ERIC Educational Resources Information Center

    Krafft, Caroline; Davis, Elizabeth E.; Tout, Kathryn

    2014-01-01

    The purpose of this series is to summarize key findings and implications from the Maryland Child Care Choices study, a longitudinal survey of parents who were applying for Temporary Assistance for Needy Families (TANF) in 2011. Families in the Maryland Child Care Choices study had at least one child age six or younger and lived in one of the…

  15. Funding Guidelines--Peer Performance Analysis: University System of Maryland, Morgan State University, St. Mary's College of Maryland

    ERIC Educational Resources Information Center

    Maryland Higher Education Commission, 2004

    2004-01-01

    This report contains a comprehensive assessment of the performance of each University System of Maryland institution, Morgan State University, and St. Mary's College of Maryland in comparison to their performance peers. The report includes a discussion of the performance measures, criteria used to assess institutional performance, and issues…

  16. Maryland striped bass: recruitment declining below replacement

    SciTech Connect

    Goodyear, C.P.; Cohen, J.E.; Christensen, S.W.

    1985-01-01

    A mathematical technique was developed to examined interrelationships among first-year survival rates, adult fecundity, and adult survival of striped bass Morone saxatilis based on indices of year-class strength. Application of this technique to striped bass in Maryland waters of the Chesapeake Bay provided evidence for reduced survival in the life cycle. If adult fecundity and survival have remained constant, first-year survival declined significantly from 1969 to 1983, and averaged less than that needed for replacement for the last 10 years. Treatment of the individual spawning grounds separately indicated that the downward trend in survival for the pooled data was the result of declines in the upper bay and, to a lesser extent, in the Choptank River. Alternatively, if first-year survival and adult fecundity were assumed to have remained constant, an annual decline of about 1.9% in adult survival would have been required to produce the observed trend in the pooled year-class data. This would be consistent with increased fishing mortality and implies declining recruitment because of declining stock size. Continuing declines in first-year or adult survival would eliminate the Maryland striped bass stock and the fishery it supports. Conversely, an increase in adult survival could offset of the unknown factor or factors responsible for the apparent decline in first-year survival. 25 references, 1 figure, 1 table.

  17. Children Entering School Ready to Learn: 2010-2011 Maryland Model for School Readiness

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2009

    2009-01-01

    The report shares what everyone has learned from the 2010-2011 Maryland Model for School Readiness (MMSR) data about the school readiness of Maryland's children: statewide, by subgroups, and for each of Maryland's 24 local jurisdictions. Some of the highlights are: (1) The percentage of Maryland kindergarteners fully ready to start school…

  18. 15 CFR 265.5 - Laws of Maryland and Colorado applicable.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 15 Commerce and Foreign Trade 1 2012-01-01 2012-01-01 false Laws of Maryland and Colorado... & TECHNOLOGY, GAITHERSBURG, MARYLAND, AND BOULDER AND FORT COLLINS, COLORADO General § 265.5 Laws of Maryland... Maryland and of the State of Colorado shall be applicable to the site located within those...

  19. 15 CFR 265.5 - Laws of Maryland and Colorado applicable.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 15 Commerce and Foreign Trade 1 2014-01-01 2014-01-01 false Laws of Maryland and Colorado... & TECHNOLOGY, GAITHERSBURG, MARYLAND, AND BOULDER AND FORT COLLINS, COLORADO General § 265.5 Laws of Maryland... Maryland and of the State of Colorado shall be applicable to the site located within those...

  20. 15 CFR 265.5 - Laws of Maryland and Colorado applicable.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 15 Commerce and Foreign Trade 1 2013-01-01 2013-01-01 false Laws of Maryland and Colorado... & TECHNOLOGY, GAITHERSBURG, MARYLAND, AND BOULDER AND FORT COLLINS, COLORADO General § 265.5 Laws of Maryland... Maryland and of the State of Colorado shall be applicable to the site located within those...

  1. 15 CFR 265.5 - Laws of Maryland and Colorado applicable.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Laws of Maryland and Colorado... & TECHNOLOGY, GAITHERSBURG, MARYLAND, AND BOULDER AND FORT COLLINS, COLORADO General § 265.5 Laws of Maryland... Maryland and of the State of Colorado shall be applicable to the site located within those...

  2. 30 CFR 920.20 - Approval of Maryland abandoned mine plan.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 3 2011-07-01 2011-07-01 false Approval of Maryland abandoned mine plan. 920... OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE MARYLAND § 920.20 Approval of Maryland abandoned mine plan. The Maryland Abandoned Mine Plan, as submitted...

  3. 30 CFR 920.20 - Approval of Maryland abandoned mine plan.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 3 2014-07-01 2014-07-01 false Approval of Maryland abandoned mine plan. 920... OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE MARYLAND § 920.20 Approval of Maryland abandoned mine plan. The Maryland Abandoned Mine Plan, as submitted...

  4. 30 CFR 920.20 - Approval of Maryland abandoned mine plan.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 3 2012-07-01 2012-07-01 false Approval of Maryland abandoned mine plan. 920... OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE MARYLAND § 920.20 Approval of Maryland abandoned mine plan. The Maryland Abandoned Mine Plan, as submitted...

  5. 15 CFR 265.5 - Laws of Maryland and Colorado applicable.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 15 Commerce and Foreign Trade 1 2011-01-01 2011-01-01 false Laws of Maryland and Colorado... & TECHNOLOGY, GAITHERSBURG, MARYLAND, AND BOULDER AND FORT COLLINS, COLORADO General § 265.5 Laws of Maryland... Maryland and of the State of Colorado shall be applicable to the site located within those...

  6. 30 CFR 920.20 - Approval of Maryland abandoned mine plan.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 3 2013-07-01 2013-07-01 false Approval of Maryland abandoned mine plan. 920... OF THE INTERIOR PROGRAMS FOR THE CONDUCT OF SURFACE MINING OPERATIONS WITHIN EACH STATE MARYLAND § 920.20 Approval of Maryland abandoned mine plan. The Maryland Abandoned Mine Plan, as submitted...

  7. Raptors and aircraft

    USGS Publications Warehouse

    Smith, D.G.; Ellis, D.H.; Johnson, T.H.; Glinski, Richard L.; Pendleton, Beth Giron; Moss, Mary Beth; LeFranc, Maurice N.=; Millsap, Brian A.; Hoffman, Stephen W.

    1988-01-01

    Less than 5% of all bird strikes of aircraft are by raptor species, but damage to airframe structure or jet engine dysfunction are likely consequences. Beneficial aircraft-raptor interactions include the use of raptor species to frighten unwanted birds from airport areas and the use of aircraft to census raptor species. Many interactions, however, modify the raptor?s immediate behavior and some may decrease reproduction of sensitive species. Raptors may respond to aircraft stimuli by exhibiting alarm, increased heart rate, flushing or fleeing and occasionally by directly attacking intruding aircraft. To date, most studies reveal that raptor responses to aircraft are brief and do not limit reproduction; however, additional study is needed.

  8. Non-linear controls influence functions in an aircraft dynamics simulator

    NASA Astrophysics Data System (ADS)

    Guerreiro, Nelson M.; Hubbard, James E., Jr.; Motter, Mark A.

    2006-03-01

    In the development and testing of novel structural and controls concepts, such as morphing aircraft wings, appropriate models are needed for proper system characterization. In most instances, available system models do not provide the required additional degrees of freedom for morphing structures but may be modified to some extent to achieve a compatible system. The objective of this study is to apply wind tunnel data collected for an Unmanned Air Vehicle (UAV), that implements trailing edge morphing, to create a non-linear dynamics simulator, using well defined rigid body equations of motion, where the aircraft stability derivatives change with control deflection. An analysis of this wind tunnel data, using data extraction algorithms, was performed to determine the reference aerodynamic force and moment coefficients for the aircraft. Further, non-linear influence functions were obtained for each of the aircraft's control surfaces, including the sixteen trailing edge flap segments. These non-linear controls influence functions are applied to the aircraft dynamics to produce deflection-dependent aircraft stability derivatives in a non-linear dynamics simulator. Time domain analysis of the aircraft motion, trajectory, and state histories can be performed using these nonlinear dynamics and may be visualized using a 3-dimensional aircraft model. Linear system models can be extracted to facilitate frequency domain analysis of the system and for control law development. The results of this study are useful in similar projects where trailing edge morphing is employed and will be instrumental in the University of Maryland's continuing study of active wing load control.

  9. Lightning effects on aircraft

    NASA Technical Reports Server (NTRS)

    1977-01-01

    Direct and indirect effects of lightning on aircraft were examined in relation to aircraft design. Specific trends in design leading to more frequent lightning strikes were individually investigated. These trends included the increasing use of miniaturized, solid state components in aircraft electronics and electric power systems. A second trend studied was the increasing use of reinforced plastics and other nonconducting materials in place of aluminum skins, a practice that reduces the electromagnetic shielding furnished by a conductive skin.

  10. Modern meteorological computing resources - The Maryland experience

    NASA Technical Reports Server (NTRS)

    Huffman, George J.

    1988-01-01

    The Department of Meteorology at the University of Maryland is developing one of the first computer systems in meteorology to take advantage of the new networked computer architecture that has been made possible by recent advances in computer and communication technology. Elements of the department's system include scientific workstations, local mainframe computers, remote mainframe computers, local-area networks,'long-haul' computer-to-computer communications, and 'receive-only' communications. Some background is provided, together with highlights of some lessons that were learned in carrying out the design. In agreement with work in the Unidata Project, this work shows that the networked computer architecture discussed here presents a new style of resources for solving problems that arise in meteorological research and education.

  11. Hawk migration over White Marsh, Maryland

    USGS Publications Warehouse

    Hackman, C.D.; Henny, C.J.

    1971-01-01

    The average number of hawks observed per hour in autumn migration between 1951-1954 and 1958-1961 at White Marsh, Maryland, was compared. The counts indicated that the status of the ten species observed may be divided into three categories: (1) relatively stable species (red-tailed hawk), (2) declining species (sparrow hawk, red-shouldered hawk, osprey, marsh hawk, and broad-winged hawk), and (3) rapidly declining species (peregrine falcon, Cooper?s hawk, bald eagle, and sharp-shinned hawk). The findings from this study are in agreement with the available literature and the status of the populations appears to be related to the food habits of the species.

  12. Aircraft fire safety research

    NASA Technical Reports Server (NTRS)

    Botteri, Benito P.

    1987-01-01

    During the past 15 years, very significant progress has been made toward enhancing aircraft fire safety in both normal and hostile (combat) operational environments. Most of the major aspects of the aircraft fire safety problem are touched upon here. The technology of aircraft fire protection, although not directly applicable in all cases to spacecraft fire scenarios, nevertheless does provide a solid foundation to build upon. This is particularly true of the extensive research and testing pertaining to aircraft interior fire safety and to onboard inert gas generation systems, both of which are still active areas of investigation.

  13. Hypersonic aircraft design

    NASA Technical Reports Server (NTRS)

    Alkamhawi, Hani; Greiner, Tom; Fuerst, Gerry; Luich, Shawn; Stonebraker, Bob; Wray, Todd

    1990-01-01

    A hypersonic aircraft is designed which uses scramjets to accelerate from Mach 6 to Mach 10 and sustain that speed for two minutes. Different propulsion systems were considered and it was decided that the aircraft would use one full scale turbofan-ramjet. Two solid rocket boosters were added to save fuel and help the aircraft pass through the transonic region. After considering aerodynamics, aircraft design, stability and control, cooling systems, mission profile, and landing systems, a conventional aircraft configuration was chosen over that of a waverider. The conventional design was chosen due to its landing characteristics and the relative expense compared to the waverider. Fuel requirements and the integration of the engine systems and their inlets are also taken into consideration in the final design. A hypersonic aircraft was designed which uses scramjets to accelerate from Mach 6 to Mach 10 and sustain that speed for two minutes. Different propulsion systems were considered and a full scale turbofan-ramjet was chosen. Two solid rocket boosters were added to save fuel and help the aircraft pass through the transonic reqion. After the aerodynamics, aircraft design, stability and control, cooling systems, mission profile, landing systems, and their physical interactions were considered, a conventional aircraft configuration was chosen over that of a waverider. The conventional design was chosen due to its landing characteristics and the relative expense compared to the waverider. Fuel requirements and the integration of the engine systems and their inlets were also considered in the designing process.

  14. Updating Maryland's sea-level rise projections

    USGS Publications Warehouse

    Boesch, Donald F.; Atkinson, Larry P.; Boicourt, William C.; Boon, John D.; Cahoon, Donald R.; Dalrymple, Robert A.; Ezer, Tal; Horton, Benjamin P.; Johnson, Zoe P.; Kopp, Robert E.; Li, Ming; Moss, Richard H.; Parris, Adam; Sommerfield, Christopher K.

    2013-01-01

    With its 3,100 miles of tidal shoreline and low-lying rural and urban lands, “The Free State” is one of the most vulnerable to sea-level rise. Historically, Marylanders have long had to contend with rising water levels along its Chesapeake Bay and Atlantic Ocean and coastal bay shores. Shorelines eroded and low-relief lands and islands, some previously inhabited, were inundated. Prior to the 20th century, this was largely due to the slow sinking of the land since Earth’s crust is still adjusting to the melting of large masses of ice following the last glacial period. Over the 20th century, however, the rate of rise of the average level of tidal waters with respect to land, or relative sea-level rise, has increased, at least partially as a result of global warming. Moreover, the scientific evidence is compelling that Earth’s climate will continue to warm and its oceans will rise even more rapidly. Recognizing the scientific consensus around global climate change, the contribution of human activities to it, and the vulnerability of Maryland’s people, property, public investments, and natural resources, Governor Martin O’Malley established the Maryland Commission on Climate Change on April 20, 2007. The Commission produced a Plan of Action that included a comprehensive climate change impact assessment, a greenhouse gas reduction strategy, and strategies for reducing Maryland’s vulnerability to climate change. The Plan has led to landmark legislation to reduce the state’s greenhouse gas emissions and a variety of state policies designed to reduce energy consumption and promote adaptation to climate change.

  15. Modeling Programs Increase Aircraft Design Safety

    NASA Technical Reports Server (NTRS)

    2012-01-01

    Flutter may sound like a benign word when associated with a flag in a breeze, a butterfly, or seaweed in an ocean current. When used in the context of aerodynamics, however, it describes a highly dangerous, potentially deadly condition. Consider the case of the Lockheed L-188 Electra Turboprop, an airliner that first took to the skies in 1957. Two years later, an Electra plummeted to the ground en route from Houston to Dallas. Within another year, a second Electra crashed. In both cases, all crew and passengers died. Lockheed engineers were at a loss as to why the planes wings were tearing off in midair. For an answer, the company turned to NASA s Transonic Dynamics Tunnel (TDT) at Langley Research Center. At the time, the newly renovated wind tunnel offered engineers the capability of testing aeroelastic qualities in aircraft flying at transonic speeds near or just below the speed of sound. (Aeroelasticity is the interaction between aerodynamic forces and the structural dynamics of an aircraft or other structure.) Through round-the-clock testing in the TDT, NASA and industry researchers discovered the cause: flutter. Flutter occurs when aerodynamic forces acting on a wing cause it to vibrate. As the aircraft moves faster, certain conditions can cause that vibration to multiply and feed off itself, building to greater amplitudes until the flutter causes severe damage or even the destruction of the aircraft. Flutter can impact other structures as well. Famous film footage of the Tacoma Narrows Bridge in Washington in 1940 shows the main span of the bridge collapsing after strong winds generated powerful flutter forces. In the Electra s case, faulty engine mounts allowed a type of flutter known as whirl flutter, generated by the spinning propellers, to transfer to the wings, causing them to vibrate violently enough to tear off. Thanks to the NASA testing, Lockheed was able to correct the Electra s design flaws that led to the flutter conditions and return the

  16. Human Factors In Aircraft Automation

    NASA Technical Reports Server (NTRS)

    Billings, Charles

    1995-01-01

    Report presents survey of state of art in human factors in automation of aircraft operation. Presents examination of aircraft automation and effects on flight crews in relation to human error and aircraft accidents.

  17. High Tech and Smart Construction Distinguish This Maryland High School.

    ERIC Educational Resources Information Center

    Rist, Marilee C.

    1989-01-01

    Quince Orchard High School in Gaithersburg, Maryland, is designed to invite, encourage, and support learning. Natural daylight, earth sheltering, and siting conserve energy. Virtually every classroom and office has at least one computer. (MLF)

  18. 76 FR 64097 - Maryland; Major Disaster and Related Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-17

    ... Maryland have been designated as adversely affected by this major disaster: Anne Arundel, Cecil, Charles... and drawing funds: 97.030, Community Disaster Loans; 97.031, Cora Brown Fund; 97.032,...

  19. 77 FR 50707 - Maryland; Major Disaster and Related Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-22

    ... State of Maryland have been designated as adversely affected by this major disaster: Calvert, Charles... Numbers (CFDA) are to be used for reporting and drawing funds: 97.030, Community Disaster Loans;...

  20. Cholera associated with imported frozen coconut milk--Maryland, 1991.

    PubMed

    1991-12-13

    During August 1991, three cases of cholera in Maryland were associated with the consumption of frozen coconut milk imported from Asia. Following an investigation, the product was recalled, and no other cases have been reported. PMID:1961175

  1. Salmonellosis in passerine birds in Maryland and West Virginia

    USGS Publications Warehouse

    Locke, L.N.; Shillinger, R.B.; Jareed, T.

    1973-01-01

    Salmonella typhimurium was responsible for a die-off of evening grosbeaks (Hesperiphona vespertina) at Elkins, West Virginia, and was isolated from a pine siskin (Spinus pinus) collected at the site of a die-off near Baltimore, Maryland.

  2. 78 FR 33449 - FirstEnergy Nuclear Operating Company; Establishment of Atomic Safety and Licensing Board

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-04

    ... Opportunity for a Hearing,'' see 78 FR 16,876, 16,883 (Mar. 19, 2013), a hearing request was filed on May 20... in August 2007. See 72 FR 49,139. Issued at Rockville, Maryland this 28th day of May 2013. E. Roy... COMMISSION FirstEnergy Nuclear Operating Company; Establishment of Atomic Safety and Licensing Board...

  3. Temple U. Shuts Down For-Profit Distance-Education Company.

    ERIC Educational Resources Information Center

    Blumenstyk, Goldie

    2001-01-01

    Describes how Temple University ended Virtual Temple, its for-profit distance education effort, saying that such companies cannot make money. However, universities with similar programs--such as Columbia, Cornell, New York University, and the University of Maryland--disagree. (EV)

  4. General Aviation Aircraft Reliability Study

    NASA Technical Reports Server (NTRS)

    Pettit, Duane; Turnbull, Andrew; Roelant, Henk A. (Technical Monitor)

    2001-01-01

    This reliability study was performed in order to provide the aviation community with an estimate of Complex General Aviation (GA) Aircraft System reliability. To successfully improve the safety and reliability for the next generation of GA aircraft, a study of current GA aircraft attributes was prudent. This was accomplished by benchmarking the reliability of operational Complex GA Aircraft Systems. Specifically, Complex GA Aircraft System reliability was estimated using data obtained from the logbooks of a random sample of the Complex GA Aircraft population.

  5. The IAIMS initiative at the University of Maryland at Baltimore.

    PubMed

    Wilson, M P; Ball, M J; Zimmerman, J L; Douglas, J V

    1986-07-01

    With support from the National Library of Medicine, the University of Maryland at Baltimore is creating an Integrated Academic Information Management System (IAIMS) that will serve as a prototype for academic health centers. A campus-wide undertaking, the IAIMS initiative at Maryland is characterized by its functional comprehensiveness and its planning model. The resulting strategic plan is serving as a guide in the ongoing model development within an interdisciplinary Hypertension Center.

  6. The Hughes Co., Photographers, Baltimore, Maryland 4 March 1943 Ironwood ...

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

    The Hughes Co., Photographers, Baltimore, Maryland 4 March 1943 Ironwood under construction at the U.S. Coast Guard shipyard in Curtis Bay, Maryland. Ironwood was the only 180 built by the U.S. Coast Guard and the only one not built in Duluth, Minnesota (Note the caption on the photograph reads: U.S.C.G.C. Ironwood, top view starboard looking forward) - U.S. Coast Guard Cutter IRONWOOD, Kodiak, Kodiak Island Borough, AK

  7. Again, Maryland Ranks #1 in Advanced Placement (AP) Exam Performance

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2010

    2010-01-01

    For a second year in a row, Maryland ranked first nationwide in the percentage of public school students scoring 3 or higher on at least one AP (Advanced Placement) exam. A score of 3 or higher on the 5-point scale is considered mastery of college-level work. Maryland also continues to show strong gains in the number of students taking an AP exam,…

  8. View east of the wye at Maryland Junction, West Virginia, ...

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

    View east of the wye at Maryland Junction, West Virginia, milepost 164, with the Cumberland Extension entering at right. The diesel shop (built 1956) is at left. The WM continued northwest to Ridgeley Yard, and onto the passenger station in downtown Cumberland (out of view at upper left). The WM's Thomas Subivision went south to Elkins, West Virginia (lower left). - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

  9. Cable Tensiometer for Aircraft

    NASA Technical Reports Server (NTRS)

    Nunnelee, Mark (Inventor)

    2008-01-01

    The invention is a cable tensiometer that can be used on aircraft for real-time, in-flight cable tension measurements. The invention can be used on any aircraft cables with high precision. The invention is extremely light-weight, hangs on the cable being tested and uses a dual bending beam design with a high mill-volt output to determine tension.

  10. Lightning protection of aircraft

    NASA Technical Reports Server (NTRS)

    Fisher, F. A.; Plumer, J. A.

    1977-01-01

    The current knowledge concerning potential lightning effects on aircraft and the means that are available to designers and operators to protect against these effects are summarized. The increased use of nonmetallic materials in the structure of aircraft and the constant trend toward using electronic equipment to handle flight-critical control and navigation functions have served as impetus for this study.

  11. Civil aircraft accident investigation.

    PubMed

    Haines, Daniel

    2013-01-01

    This talk reviews some historic aircraft accidents and some more recent. It reflects on the division of accident causes, considering mechanical failures and aircrew failures, and on aircrew training. Investigation results may lead to improved aircraft design, and to appropriate crew training. PMID:24057309

  12. Maryland's Special Populations Cancer Network: cancer health disparities reduction model.

    PubMed

    Baquet, Claudia R; Mack, Kelly M; Bramble, Joy; DeShields, Mary; Datcher, Delores; Savoy, Mervin; Hummel, Kery; Mishra, Shiraz I; Brooks, Sandra E; Boykin-Brown, Stephanie

    2005-05-01

    Cancer in Maryland is a serious health concern for minority and underserved populations in rural and urban areas. This report describes the National Cancer Institute (NCI) supported Maryland Special Populations Cancer Network (MSPN), a community-academic partnership. The MSPN's priority populations include African Americans, Native Americans, and other medically underserved residents of rural and urban areas. The MSPN has established a community infrastructure through formal collaborations with several community partners located in Baltimore City, the rural Eastern Shore, and Southern and Western Maryland, and among the Piscataway Conoy Tribe and the other 27 Native American Tribes in Maryland. Key partners also include the University of Maryland Eastern Shore and the University of Maryland Statewide Health Network. The MSPN has implemented innovative and successful programs in cancer health disparities research, outreach, and training; clinical trials education, health disparities policy, and resource leveraging. The MSPN addresses the goal of the NCI and the Department of Health and Human Services (DHHS) to reduce and eventually eliminate cancer health disparities. Community-academic partnerships are the foundation of this successful network. PMID:15937382

  13. The Connection Between Hurricanes and Precipitation in Maryland

    NASA Astrophysics Data System (ADS)

    Liu, J.; Liu, Z.

    2015-12-01

    Precipitation, though necessary, can affect humanity in disastrous ways. Droughts, floods and other related disasters can costly damage economy. In 2012, Hurricane Sandy, caused a total economic loss of about 65 billion and in the state of Maryland, approximately 13.55 million. The purpose of this study is to determine what, if any effect do hurricanes have on monthly and annual precipitation in Maryland. Furthermore, using this information, discussion can be made on hurricane activity in Maryland and the possible connection to global climate change. To achieve this goal, three objectives were developed to: 1) Gain a better understanding of Maryland's terrain and how that affects precipitation; 2) Calculate monthly and annual precipitation in the state; and 3) Calculate how much precipitation was contributed by each hurricane. The NASA TRMM Multi-Satellite Precipitation Analysis (TMPA) precipitation products were used. Our results show that hurricanes do significantly affect both monthly and annual precipitation in Maryland, so much so that if removed, most monthly and annual precipitations would be below their averages. The methodology could be applied to other states or regions as well. Giving the global warming scenario, it is important to understand changes of hurricane size, track and intensity since both can have significant impacts on Maryland, which warrants further studies.

  14. Why aircraft disinsection?

    PubMed Central

    Gratz, N. G.; Steffen, R.; Cocksedge, W.

    2000-01-01

    A serious problem is posed by the inadvertent transport of live mosquitoes aboard aircraft arriving from tropical countries where vector-borne diseases are endemic. Surveys at international airports have found many instances of live insects, particularly mosquitoes, aboard aircraft arriving from countries where malaria and arboviruses are endemic. In some instances mosquito species have been established in countries in which they have not previously been reported. A serious consequence of the transport of infected mosquitoes aboard aircraft has been the numerous cases of "airport malaria" reported from Europe, North America and elsewhere. There is an important on-going need for the disinsection of aircraft coming from airports in tropical disease endemic areas into nonendemic areas. The methods and materials available for use in aircraft disinsection and the WHO recommendations for their use are described. PMID:10994283

  15. Aircraft operations management manual

    NASA Technical Reports Server (NTRS)

    1992-01-01

    The NASA aircraft operations program is a multifaceted, highly diverse entity that directly supports the agency mission in aeronautical research and development, space science and applications, space flight, astronaut readiness training, and related activities through research and development, program support, and mission management aircraft operations flights. Users of the program are interagency, inter-government, international, and the business community. This manual provides guidelines to establish policy for the management of NASA aircraft resources, aircraft operations, and related matters. This policy is an integral part of and must be followed when establishing field installation policy and procedures covering the management of NASA aircraft operations. Each operating location will develop appropriate local procedures that conform with the requirements of this handbook. This manual should be used in conjunction with other governing instructions, handbooks, and manuals.

  16. Hypersonic reconnaissance aircraft

    NASA Technical Reports Server (NTRS)

    Bulk, Tim; Chiarini, David; Hill, Kevin; Kunszt, Bob; Odgen, Chris; Truong, Bon

    1992-01-01

    A conceptual design of a hypersonic reconnaissance aircraft for the U.S. Navy is discussed. After eighteen weeks of work, a waverider design powered by two augmented turbofans was chosen. The aircraft was designed to be based on an aircraft carrier and to cruise 6,000 nautical miles at Mach 4;80,000 feet and above. As a result the size of the aircraft was only allowed to have a length of eighty feet, fifty-two feet in wingspan, and roughly 2,300 square feet in planform area. Since this is a mainly cruise aircraft, sixty percent of its 100,000 pound take-off weight is JP fuel. At cruise, the highest temperature that it will encounter is roughly 1,100 F, which can be handled through the use of a passive cooling system.

  17. B-52 Launch Aircraft in Flight

    NASA Technical Reports Server (NTRS)

    2001-01-01

    the development of parachute recovery systems used to recover the space shuttle solid rocket booster casings. It also supported eight orbiter (space shuttle) drag chute tests in 1990. In addition, the B-52 served as the air launch platform for the first six Pegasus space boosters. During its many years of service, the B-52 has undergone several modifications. The first major modification was made by North American Aviation (now part of Boeing) in support of the X-15 program. This involved creating a launch-panel-operator station for monitoring the status of the test vehicle being carried, cutting a large notch in the right inboard wing flap to accommodate the vertical tail of the X-15 aircraft, and installing a wing pylon that enables the B-52 to carry research vehicles and test articles to be air-launched/dropped. Located on the right wing, between the inboard engine pylon and the fuselage, this wing pylon was subjected to extensive testing prior to its use. For each test vehicle the B-52 carried, minor changes were made to the launch-panel operator's station. Built originally by the Boeing Company, the NASA B-52 is powered by eight Pratt & Whitney J57-19 turbojet engines, each of which produce 12,000 pounds of thrust. The aircraft's normal launch speed has been Mach 0.8 (about 530 miles per hour) and its normal drop altitude has been 40,000 to 45,000 feet. It is 156 feet long and has a wing span of 185 feet.

  18. Predicting visibility of aircraft.

    PubMed

    Watson, Andrew; Ramirez, Cesar V; Salud, Ellen

    2009-05-20

    Visual detection of aircraft by human observers is an important element of aviation safety. To assess and ensure safety, it would be useful to be able to be able to predict the visibility, to a human observer, of an aircraft of specified size, shape, distance, and coloration. Examples include assuring safe separation among aircraft and between aircraft and unmanned vehicles, design of airport control towers, and efforts to enhance or suppress the visibility of military and rescue vehicles. We have recently developed a simple metric of pattern visibility, the Spatial Standard Observer (SSO). In this report we examine whether the SSO can predict visibility of simulated aircraft images. We constructed a set of aircraft images from three-dimensional computer graphic models, and measured the luminance contrast threshold for each image from three human observers. The data were well predicted by the SSO. Finally, we show how to use the SSO to predict visibility range for aircraft of arbitrary size, shape, distance, and coloration.

  19. Predicting Visibility of Aircraft

    PubMed Central

    Watson, Andrew; Ramirez, Cesar V.; Salud, Ellen

    2009-01-01

    Visual detection of aircraft by human observers is an important element of aviation safety. To assess and ensure safety, it would be useful to be able to be able to predict the visibility, to a human observer, of an aircraft of specified size, shape, distance, and coloration. Examples include assuring safe separation among aircraft and between aircraft and unmanned vehicles, design of airport control towers, and efforts to enhance or suppress the visibility of military and rescue vehicles. We have recently developed a simple metric of pattern visibility, the Spatial Standard Observer (SSO). In this report we examine whether the SSO can predict visibility of simulated aircraft images. We constructed a set of aircraft images from three-dimensional computer graphic models, and measured the luminance contrast threshold for each image from three human observers. The data were well predicted by the SSO. Finally, we show how to use the SSO to predict visibility range for aircraft of arbitrary size, shape, distance, and coloration. PMID:19462007

  20. Water withdrawal and use in Maryland, 1986

    USGS Publications Warehouse

    Wheeler, J.C.

    1990-01-01

    During 1986, about 1,460 million gallons per day of freshwater was withdrawn from the surface-, and groundwater resources of Maryland. In addition, more than 6,240 million gallons per day of saline surface water was withdrawn and used primarily for cooling purposes in the generation of electricity. Most freshwater withdrawals (84%) were from surface water sources and were withdrawn and used in the Potomac drainage basin, whereas most groundwater was withdrawn and used in the Upper Chesapeake drainage basin. The Potomac Group aquifers provided the most groundwater (56 million gallons per day). Ten water use categories comprise the major demands on the surface and groundwater resources of the State: public supply, domestic, commercial, industrial, mining, thermoelectric power generation, hydroelectric power generation, agricultural (non-irrigation), irrigation, and aquaculture. Public-supply systems withdrew the most water in the State (801 million gallon/day) for use by residents, commercial establishments, and industries. Baltimore City had the largest public-supply use in 1986 (about 151 million gallons/day). (USGS)

  1. Maryland's program for buying recycled paper (innovations)

    SciTech Connect

    Keller, R.

    1980-07-01

    Maryland was the first state to mandate large purchases of recycled paper. In 1977, the legislature passed House Bill 153 which requires the State to increase its purchase of recycled paper (paper containing 80 percent post-consumer waste) to five percent of the total paper purchases by 1978, 25 percent by 1981, and 40 percent by 1985. Since the passage of the law, the state has purchased 272,000 reams of recycled bond paper, 40,000 corrugated boxes, and 25,000 cases of recycled paper towels. State agencies have also purchased an additional 438,616 dollars of recycled towels, napkins, and toilet tissue. These purchases, totaling over 1.2 million dollars, have saved approximately 81 billion Btu's or enough home heating oil for 643 homes for a year. Over 1,700 tons of solid waste have been withheld from the Nation's solid waste stream. The recycled paper has generally been less expensive than virgin paper. All of these benefits have been achieved without loss of quality. Program implementation and problems are discussed.

  2. Maryland Training Institute tailors FP instruction.

    PubMed

    1977-01-01

    The Family Planning Training Institute, a cooperative venture of Planned Parenthood of Maryland and the Department of Health, Education, and Welfare, was established in 1966 as 1 of Planned Parenthood's first 3 professional training centers. The Institute was 1 of the 1st to offer family planning instruction for both private and public sectors of the profession. The combination was the result of both state and federal funding climaxed by the Title X Health, Education, and Welfare grant in 1971. The major reason for the Title X award may have been the specialized instruction provided by the institute. The staff consists of medical personnel from nearby Johns Hopkins University and the city hospitals. The curriculum is individually "programmed" for nurses, nurse practitioners, social and outreach workers, clinic assistants, and those with only minimal involvement with family planning. All classes are based on models of adult learning principles, and each session is 2-3 7-hour days. A realistic setting for role playing, interviewing, and demonstrations of clinic techniques is provided. PMID:12335220

  3. OVRhyp, Scramjet Test Aircraft

    NASA Technical Reports Server (NTRS)

    Aslan, J.; Bisard, T.; Dallinga, S.; Draper, K.; Hufford, G.; Peters, W.; Rogers, J.

    1990-01-01

    A preliminary design for an unmanned hypersonic research vehicle to test scramjet engines is presented. The aircraft will be launched from a carrier aircraft at an altitude of 40,000 feet at Mach 0.8. The vehicle will then accelerate to Mach 6 at an altitude of 100,000 feet. At this stage the prototype scramjet will be employed to accelerate the vehicle to Mach 10 and maintain Mach 10 flight for 2 minutes. The aircraft will then decelerate and safely land.

  4. Aircraft compass characteristics

    NASA Technical Reports Server (NTRS)

    Peterson, John B; Smith, Clyde W

    1937-01-01

    A description of the test methods used at the National Bureau of Standards for determining the characteristics of aircraft compasses is given. The methods described are particularly applicable to compasses in which mineral oil is used as the damping liquid. Data on the viscosity and density of certain mineral oils used in United States Navy aircraft compasses are presented. Characteristics of Navy aircraft compasses IV to IX and some other compasses are shown for the range of temperatures experienced in flight. Results of flight tests are presented. These results indicate that the characteristic most desired in a steering compass is a short period and, in a check compass, a low overswing.

  5. Loftin Collection - Boeing Aircraft

    NASA Technical Reports Server (NTRS)

    1933-01-01

    Either a F2B-1 or F3B-1, both aircraft were built by Boeing and both were powered by Pratt and Whitney Wasp engines. These fighters were intended for Navy shipboard use. Boeing F3B-1: While most Boeing F3B-1s served the U. S. Navy aircraft carriers the Lexington and the Saratoga, this example flew in NACA hands at the Langley Memorial Aeronautical Laboratory in the late 1920's. Also known as the Boeing Model 77, the aircraft was the next to last F3B-1 build in November 1928.

  6. Some fighter aircraft trends

    NASA Technical Reports Server (NTRS)

    Spearman, L.

    1985-01-01

    Some basic trends in fighters are traced from the post World II era. Beginning with the first operational jet fighter, the P-80, the characteristics of subsequent fighter aircraft are examined for performance, mission capability, effectiveness, and cost. Characteristics presented include: power loading, wing loading, maximum speed, rate of climb, turn rate, weight and weight distribution, cost and cost distribution. The characteristics of some USSR aircraft are included for comparison. The trends indicate some of the rationale for certain fighter designs and some likely characteristics to be sought in future fighter aircraft designs.

  7. Lightning hazards to aircraft

    NASA Technical Reports Server (NTRS)

    Corn, P. B.

    1978-01-01

    Lightning hazards and, more generally, aircraft static electricity are discussed by a representative for the Air Force Flight Dynamics Laboratory. An overview of these atmospheric electricity hazards to aircraft and their systems is presented with emphasis on electrical and electronic subsystems. The discussion includes reviewing some of the characteristics of lightning and static electrification, trends in weather and lightning-related mishaps, some specific threat mechanisms and susceptible aircraft subsystems and some of the present technology gaps. A roadmap (flow chart) is presented to show the direction needed to address these problems.

  8. Tropospheric sampling with aircraft

    SciTech Connect

    Daum, P.H.; Springston, S.R.

    1991-03-01

    Aircraft constitute a unique environment which places stringent requirements on the instruments used to measure the concentrations of atmospheric trace gases and aerosols. Some of these requirements such as minimization of size, weight, and power consumption are general; others are specific to individual techniques. This review presents the basic principles and considerations governing the deployment of trace gas and aerosol instrumentation on an aircraft. An overview of common instruments illustrates these points and provides guidelines for designing and using instruments on aircraft-based measurement programs.

  9. Antecedents and analogues - Experimental aircraft

    NASA Technical Reports Server (NTRS)

    Smith, R. H.

    1978-01-01

    The paper reviews the development of experimental aircraft from 1953 to the present. Consideration is given to the X-series experimental aircraft, to X-15 (the first aerospace plane), to the transition of experimental aircraft to high-speed flight, to XB-70 research, to lifting body research aircraft, and to current high-speed flight research.

  10. Natural forests of Maryland: an explanaton of the vegetation map of Maryland

    SciTech Connect

    Brush, G.S.; Lenk, C.; Smith, J.

    1980-03-01

    The forests of Maryland have been mapped at a scale of 1:250,000 on the basis of 15 regional associations: (1) tamarack, (2) bald cypress, (3) hemlock-yellow birch-black birch, (4) river birch-sycamore, (5) sycamore-green ash-box elder-silver maple, (6) shingle oak, (7) chestnut oak-post oak-blackjack oak, (8) chestnut oak-bear oak, (9) chestnut oak, (10) loblolly pine, (11) basket oak-lobolly pine, (12) willow oak-loblolly pine, (13) basket oak, (14) sugar maple-basswood, and (15) tulip poplar. The associations differ from each other in species composition and in abundances of species common to many associations. Each was identified in the field by the presence of relatively few common discontinuous tree species referred to as characteristic species. Correlations between forest associations and geologic, topographic, and soils units mapped at a similar scale suggest that patterns of available water are important in controlling distribution of woody species throughout Maryland.

  11. Adaptive structures for fixed and rotary wing aircraft

    NASA Astrophysics Data System (ADS)

    Martin, Willi; Jänker, Peter; Siemetzki, Markus; Lorkowski, Thomas; Grohmann, Boris; Maier, Rudolf; Maucher, Christoph; Klöppel, Valentin; Enenkl, Bernhard; Roth, Dieter; Hansen, Heinz

    2007-07-01

    Since more than 10 years EADS Innovation Works, which is the corporate research centre of EADS (European Aeronautic Defence and Space Company), is investigating smart materials and adaptive structures for aircraft in cooperation with EADS business units. Focus of research efforts are adaptive systems for shape control, noise reduction and vibration control of both fixed and rotary wing aircraft as well as for lift optimisation of fixed wing aircraft. Two outstanding adaptive systems which have been pushed ahead in cooperation with Airbus Germany and Eurocopter Germany are adaptive servo flaps for helicopter rotor blades and innovative high lift devices for fixed wing aircraft which both were tested in flight for the first time representing world premieres. In this paper various examples of adaptive systems are presented which were developed and realized by EADS in recent years.

  12. Depreciation of aircraft

    NASA Technical Reports Server (NTRS)

    Warner, Edward P

    1922-01-01

    There is a widespread, and quite erroneous, impression to the effect that aircraft are essentially fragile and deteriorate with great rapidity when in service, so that the depreciation charges to be allowed on commercial or private operation are necessarily high.

  13. Advanced hypersonic aircraft design

    NASA Technical Reports Server (NTRS)

    Utzinger, Rob; Blank, Hans-Joachim; Cox, Craig; Harvey, Greg; Mckee, Mike; Molnar, Dave; Nagy, Greg; Petersen, Steve

    1992-01-01

    The objective of this design project is to develop the hypersonic reconnaissance aircraft to replace the SR-71 and to complement existing intelligence gathering devices. The initial design considerations were to create a manned vehicle which could complete its mission with at least two airborne refuelings. The aircraft must travel between Mach 4 and Mach 7 at an altitude of 80,000 feet for a maximum range of 12,000 nautical miles. The vehicle should have an air breathing propulsion system at cruise. With a crew of two, the aircraft should be able to take off and land on a 10,000 foot runway, and the yearly operational costs were not to exceed $300 million. Finally, the aircraft should exhibit stealth characteristics, including a minimized radar cross-section (RCS) and a reduced sonic boom. The technology used in this vehicle should allow for production between the years 1993 and 1995.

  14. Aircraft Engine Emissions. [conference

    NASA Technical Reports Server (NTRS)

    1977-01-01

    A conference on a aircraft engine emissions was held to present the results of recent and current work. Such diverse areas as components, controls, energy efficient engine designs, and noise and pollution reduction are discussed.

  15. The Aircraft Morphing Program

    NASA Technical Reports Server (NTRS)

    Wlezien, R. W.; Horner, G. C.; McGowan, A. R.; Padula, S. L.; Scott, M. A.; Silcox, R. J.; Simpson, J. O.

    1998-01-01

    In the last decade smart technologies have become enablers that cut across traditional boundaries in materials science and engineering. Here we define smart to mean embedded actuation, sensing, and control logic in a tightly coupled feedback loop. While multiple successes have been achieved in the laboratory, we have yet to see the general applicability of smart devices to real aircraft systems. The NASA Aircraft Morphing program is an attempt to couple research across a wide range of disciplines to integrate smart technologies into high payoff aircraft applications. The program bridges research in seven individual disciplines and combines the effort into activities in three primary program thrusts. System studies are used to assess the highest- payoff program objectives, and specific research activities are defined to address the technologies required for development of smart aircraft systems. In this paper we address the overall program goals and programmatic structure, and discuss the challenges associated with bringing the technologies to fruition.

  16. Laminar Flow Aircraft Certification

    NASA Technical Reports Server (NTRS)

    Williams, Louis J. (Compiler)

    1986-01-01

    Various topics telative to laminar flow aircraft certification are discussed. Boundary layer stability, flaps for laminar flow airfoils, computational wing design studies, manufacturing requirements, windtunnel tests, and flow visualization are among the topics covered.

  17. Aircraft electromagnetic compatibility

    NASA Technical Reports Server (NTRS)

    Clarke, Clifton A.; Larsen, William E.

    1987-01-01

    Illustrated are aircraft architecture, electromagnetic interference environments, electromagnetic compatibility protection techniques, program specifications, tasks, and verification and validation procedures. The environment of 400 Hz power, electrical transients, and radio frequency fields are portrayed and related to thresholds of avionics electronics. Five layers of protection for avionics are defined. Recognition is given to some present day electromagnetic compatibility weaknesses and issues which serve to reemphasize the importance of EMC verification of equipment and parts, and their ultimate EMC validation on the aircraft. Proven standards of grounding, bonding, shielding, wiring, and packaging are laid out to help provide a foundation for a comprehensive approach to successful future aircraft design and an understanding of cost effective EMC in an aircraft setting.

  18. Solar thermal aircraft

    DOEpatents

    Bennett, Charles L.

    2007-09-18

    A solar thermal powered aircraft powered by heat energy from the sun. A heat engine, such as a Stirling engine, is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller. The heat engine has a thermal battery in thermal contact with it so that heat is supplied from the thermal battery. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

  19. Aircraft parameter estimation

    NASA Technical Reports Server (NTRS)

    Iliff, Kenneth W.

    1987-01-01

    The aircraft parameter estimation problem is used to illustrate the utility of parameter estimation, which applies to many engineering and scientific fields. Maximum likelihood estimation has been used to extract stability and control derivatives from flight data for many years. This paper presents some of the basic concepts of aircraft parameter estimation and briefly surveys the literature in the field. The maximum likelihood estimator is discussed, and the basic concepts of minimization and estimation are examined for a simple simulated aircraft example. The cost functions that are to be minimized during estimation are defined and discussed. Graphic representations of the cost functions are given to illustrate the minimization process. Finally, the basic concepts are generalized, and estimation from flight data is discussed. Some of the major conclusions for the simulated example are also developed for the analysis of flight data from the F-14, highly maneuverable aircraft technology (HiMAT), and space shuttle vehicles.

  20. Alternative jet aircraft fuels

    NASA Technical Reports Server (NTRS)

    Grobman, J.

    1979-01-01

    Potential changes in jet aircraft fuel specifications due to shifts in supply and quality of refinery feedstocks are discussed with emphasis on the effects these changes would have on the performance and durability of aircraft engines and fuel systems. Combustion characteristics, fuel thermal stability, and fuel pumpability at low temperature are among the factors considered. Combustor and fuel system technology needs for broad specification fuels are reviewed including prevention of fuel system fouling and fuel system technology for fuels with higher freezing points.

  1. 75 FR 48627 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Transportation...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-11

    ... include Maryland's regulation regarding conflict resolution associated with conformity determinations... and unless it also approves Maryland's regulation regarding conflict resolution associated with...). ACTION: Withdrawal of proposed rule. SUMMARY: On June 18, 2010 (75 FR 34669), EPA published a...

  2. Records of the deer nasal bot fly Cephenemyia phobifer (Clark) in Maryland (Diptera: Oestridae)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The Deer Nasal Bot, Cephenemyia phobifer (Clark), is recorded for Maryland for the first time, based on rearing and collection records. Photographic illustrations of the Maryland specimens are presented....

  3. 150 Passenger Commercial Aircraft

    NASA Technical Reports Server (NTRS)

    Bucovsky, Adrian; Romli, Fairuz I.; Rupp, Jessica

    2002-01-01

    It has been projected that the need for a short-range mid-sized, aircraft is increasing. The future strategy to decrease long-haul flights will increase the demand for short-haul flights. Since passengers prefer to meet their destinations quickly, airlines will increase the frequency of flights, which will reduce the passenger load on the aircraft. If a point-to-point flight is not possible, passengers will prefer only a one-stop short connecting flight to their final destination. A 150-passenger aircraft is an ideal vehicle for these situations. It is mid-sized aircraft and has a range of 3000 nautical miles. This type of aircraft would market U.S. domestic flights or inter-European flight routes. The objective of the design of the 150-passenger aircraft is to minimize fuel consumption. The configuration of the aircraft must be optimized. This aircraft must meet CO2 and NOx emissions standards with minimal acquisition price and operating costs. This report contains all the work that has been performed for the completion of the design of a 150 passenger commercial aircraft. The methodology used is the Technology Identification, Evaluation, and Selection (TIES) developed at Georgia Tech Aerospace Systems Design laboratory (ASDL). This is an eight-step conceptual design process to evaluate the probability of meeting the design constraints. This methodology also allows for the evaluation of new technologies to be implemented into the design. The TIES process begins with defining the problem with a need established and a market targeted. With the customer requirements set and the target values established, a baseline concept is created. Next, the design space is explored to determine the feasibility and viability of the baseline aircraft configuration. If the design is neither feasible nor viable, new technologies can be implemented to open up the feasible design space and allow for a plausible solution. After the new technologies are identified, they must be evaluated

  4. Effects of environmental pollutants on Connecticut and Maryland ospreys

    USGS Publications Warehouse

    Wiemeyer, Stanley N.; Spitzer, P.R.; Krantz, W.C.; Lamont, T.G.; Cromartie, E.

    1975-01-01

    Osprey (Pandion haliaetus) eggs were exchanged between Connecticut and Maryland osprey nests in 1968 and 1969 to test the hypothesis that the decline in reproductive success of Connecticut ospreys was caused by something within the external environment of the eggs. Incubation of 30 Connecticut osprey eggs by Maryland ospreys did not improve the hatching rate. Forty-five Maryland osprey eggs incubated by Connecticut ospreys hatched at their normal rate. The results of the egg exchanges and associated observations indicated that the most probable cause of the poor reproduction of Connecticut ospreys ,was related to contamination of the birds and their eggs. Residues of DDT and its metabolites, dieldrin, and PCBs were generally higher in fish from Connecticut than from Maryland. During 1968-69, average residues (on a nest basis) in osprey eggs from Maryland were: p,p'-DDE, 2.4 ppm; dieldrin, 0.25 ppm; PCB, 2.6 ppm. Average residues in eggs from Connecticut for the same period were: p,p'DDE, 8.9 ppm; dieldrin, 0.61 ppm; PCB, 15 ppm. There were no major changes in residue content of Connecticut eggs collected in 1964 compared with those collected in 1968-B9. One Connecticut osprey had a concentration of dieldrin in its brain which was in the lethal range. The average shell thickness of recently collected osprey eggs from Connecticut had declined 18 percent, and those from Maryland had declined 10 percent from pre-1947 norms. Dieldrin, DDE, and PCB are three environmental pollutants that have most likely been important factors in the greatly reduced reproductive success and rapid population decline of Connecticut ospreys.

  5. Commercial Aircraft Development and the Export Market

    NASA Technical Reports Server (NTRS)

    Snodgrass, J.

    1972-01-01

    The various factors which endanger the future of commercial aircraft development are defined. The factors discussed are: (1) a decline in federally funded research and development programs, (2) a general decline in the economic health of the domestic airlines, (3) the increased cost of development which may be several times the net worth of the company, (4) the development overseas of common market and manufacturing consortia, and (5) foreign manufacturers receiving significant financial support from their national governments. It is stated that unless immediate and innovative solutions to combat these factors are found, the commercial aviation industry will be in serious difficulty.

  6. 30 CFR 920.25 - Approval of Maryland abandoned mine land reclamation plan amendments.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 3 2010-07-01 2010-07-01 false Approval of Maryland abandoned mine land reclamation plan amendments. 920.25 Section 920.25 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND... STATE MARYLAND § 920.25 Approval of Maryland abandoned mine land reclamation plan amendments....

  7. 30 CFR 920.25 - Approval of Maryland abandoned mine land reclamation plan amendments.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 3 2011-07-01 2011-07-01 false Approval of Maryland abandoned mine land reclamation plan amendments. 920.25 Section 920.25 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND... STATE MARYLAND § 920.25 Approval of Maryland abandoned mine land reclamation plan amendments....

  8. 30 CFR 920.25 - Approval of Maryland abandoned mine land reclamation plan amendments.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 3 2013-07-01 2013-07-01 false Approval of Maryland abandoned mine land reclamation plan amendments. 920.25 Section 920.25 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND... STATE MARYLAND § 920.25 Approval of Maryland abandoned mine land reclamation plan amendments....

  9. 30 CFR 920.25 - Approval of Maryland abandoned mine land reclamation plan amendments.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 3 2014-07-01 2014-07-01 false Approval of Maryland abandoned mine land reclamation plan amendments. 920.25 Section 920.25 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION AND... STATE MARYLAND § 920.25 Approval of Maryland abandoned mine land reclamation plan amendments....

  10. Preparation and Retention of the Early Childhood Care and Education Workforce in Maryland

    ERIC Educational Resources Information Center

    Klein, Elisa L.; Zheng, Xiaying; Sunderman, Gail L.; Henneberger, Angela K.; Stapleton, Laura M.; Woolley, Michael E.

    2016-01-01

    Increasing awareness of the vital developmental implications of the care and education of young children has led to efforts in Maryland to advance early childhood care and education (ECCE). To that end, Maryland has consolidated ECCE services into one division of the Maryland State Department of Education (MSDE) and developed a number of…

  11. 40 CFR 81.156 - Southern Maryland Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 18 2014-07-01 2014-07-01 false Southern Maryland Intrastate Air... Air Quality Control Regions § 81.156 Southern Maryland Intrastate Air Quality Control Region. The Southern Maryland Intrastate Air Quality Control Region consists of the territorial area encompassed by...

  12. 77 FR 76060 - Maryland; Amendment No. 2 to Notice of a Major Disaster Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-26

    ... SECURITY Federal Emergency Management Agency Maryland; Amendment No. 2 to Notice of a Major Disaster... notice of a major disaster declaration for the State of Maryland (FEMA-4091-DR), dated November 20, 2012... for the State of Maryland is hereby amended to include the Individual Assistance program for...

  13. 78 FR 73472 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; State Boards Requirements

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-06

    ... AGENCY 40 CFR Part 52 Approval and Promulgation of Air Quality Implementation Plans; Maryland; State... proposes to approve the State Implementation Plan (SIP) revision submitted by the State of Maryland for the..., Philadelphia, Pennsylvania 19103. Copies of the State submittal are available at the Maryland Department of...

  14. 40 CFR 81.155 - Central Maryland Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Central Maryland Intrastate Air... Air Quality Control Regions § 81.155 Central Maryland Intrastate Air Quality Control Region. The Central Maryland Intrastate Air Quality Control Region consists of the territorial area encompassed by...

  15. 40 CFR 81.156 - Southern Maryland Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 17 2010-07-01 2010-07-01 false Southern Maryland Intrastate Air... Air Quality Control Regions § 81.156 Southern Maryland Intrastate Air Quality Control Region. The Southern Maryland Intrastate Air Quality Control Region consists of the territorial area encompassed by...

  16. 75 FR 19985 - Maryland; Amendment No. 1 to Notice of a Major Disaster Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-16

    ... SECURITY Federal Emergency Management Agency Maryland; Amendment No. 1 to Notice of a Major Disaster... notice of a major disaster declaration for the State of Maryland (FEMA-1875-DR), dated February 19, 2010... the State of Maryland is hereby amended to include the following areas among those areas determined...

  17. 40 CFR 81.156 - Southern Maryland Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 18 2012-07-01 2012-07-01 false Southern Maryland Intrastate Air... Air Quality Control Regions § 81.156 Southern Maryland Intrastate Air Quality Control Region. The Southern Maryland Intrastate Air Quality Control Region consists of the territorial area encompassed by...

  18. 76 FR 70467 - Maryland; Amendment No. 1 to Notice of a Major Disaster Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-14

    ... SECURITY Federal Emergency Management Agency Maryland; Amendment No. 1 to Notice of a Major Disaster... notice of a major disaster declaration for the State of Maryland (FEMA-4038-DR), dated October 5, 2011... for the State of Maryland is hereby amended to include the following area among those areas...

  19. 40 CFR 81.155 - Central Maryland Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 17 2011-07-01 2011-07-01 false Central Maryland Intrastate Air... Air Quality Control Regions § 81.155 Central Maryland Intrastate Air Quality Control Region. The Central Maryland Intrastate Air Quality Control Region consists of the territorial area encompassed by...

  20. 78 FR 3023 - Maryland; Amendment No. 4 to Notice of a Major Disaster Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-15

    ... SECURITY Federal Emergency Management Agency Maryland; Amendment No. 4 to Notice of a Major Disaster... notice of a major disaster declaration for the State of Maryland (FEMA-4091-DR), dated November 20, 2012... for the State of Maryland is hereby amended to include the following area among those areas...

  1. 77 FR 30500 - Agenda and Notice of Public Meeting of the Maryland Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-23

    ... Agenda and Notice of Public Meeting of the Maryland Advisory Committee Notice is hereby given, pursuant...), and the Federal Advisory Committee Act (FACA) that a planning and briefing meeting of the Maryland... incarceration rates in Maryland prisons. The purpose of the planning meeting is to discuss the Committee's...

  2. 76 FR 55698 - Maryland; Amendment No. 1 to Notice of an Emergency Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-08

    ... SECURITY Federal Emergency Management Agency Maryland; Amendment No. 1 to Notice of an Emergency... notice of an emergency declaration for the State of Maryland (FEMA-3335-EM), dated August 27, 2011, and... the State of Maryland is hereby amended to include the following areas among those areas determined...

  3. 77 FR 74200 - Maryland; Amendment No. 1 to Notice of a Major Disaster Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-13

    ... SECURITY Federal Emergency Management Agency Maryland; Amendment No. 1 to Notice of a Major Disaster... notice of a major disaster declaration for the State of Maryland (FEMA-4091-DR), ] dated November 20... declaration for the State of Maryland is hereby amended to include the following areas among those...

  4. 40 CFR 81.156 - Southern Maryland Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 17 2011-07-01 2011-07-01 false Southern Maryland Intrastate Air... Air Quality Control Regions § 81.156 Southern Maryland Intrastate Air Quality Control Region. The Southern Maryland Intrastate Air Quality Control Region consists of the territorial area encompassed by...

  5. 40 CFR 81.155 - Central Maryland Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 18 2014-07-01 2014-07-01 false Central Maryland Intrastate Air... Air Quality Control Regions § 81.155 Central Maryland Intrastate Air Quality Control Region. The Central Maryland Intrastate Air Quality Control Region consists of the territorial area encompassed by...

  6. 40 CFR 81.155 - Central Maryland Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 18 2012-07-01 2012-07-01 false Central Maryland Intrastate Air... Air Quality Control Regions § 81.155 Central Maryland Intrastate Air Quality Control Region. The Central Maryland Intrastate Air Quality Control Region consists of the territorial area encompassed by...

  7. A Parent's Guide to the MSA. Maryland Classroom. Volume 13, Number 1

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2009

    2009-01-01

    If your child attends a Maryland public school, you may already be aware that he or she will take a test called the Maryland School Assessment--MSA for short. But what is the Maryland School Assessment, and how can you help your child prepare for it? What subjects will the test cover, and what do the questions look like? This publication answers…

  8. 76 FR 70466 - Maryland; Amendment No. 2 to Notice of a Major Disaster Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-14

    ... SECURITY Federal Emergency Management Agency Maryland; Amendment No. 2 to Notice of a Major Disaster... notice of a major disaster declaration for the State of Maryland (FEMA-4038-DR), dated October 5, 2011... for the State of Maryland is hereby amended to include the following areas among those...

  9. 76 FR 70466 - Maryland; Amendment No. 1 to Notice of a Major Disaster Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-14

    ... SECURITY Federal Emergency Management Agency Maryland; Amendment No. 1 to Notice of a Major Disaster... notice of a major disaster declaration for the State of Maryland (FEMA-4034-DR), dated September 16, 2011... for the State of Maryland is hereby amended to include the following areas among those...

  10. 75 FR 28628 - Maryland; Amendment No. 2 to Notice of a Major Disaster Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-21

    ... SECURITY Federal Emergency Management Agency Maryland; Amendment No. 2 to Notice of a Major Disaster... notice of a major disaster declaration for the State of Maryland (FEMA-1875-DR), dated February 19, 2010... State of Maryland is hereby amended to include the Hazard Mitigation Grant Program for the...

  11. 40 CFR 81.155 - Central Maryland Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 18 2013-07-01 2013-07-01 false Central Maryland Intrastate Air... Air Quality Control Regions § 81.155 Central Maryland Intrastate Air Quality Control Region. The Central Maryland Intrastate Air Quality Control Region consists of the territorial area encompassed by...

  12. 40 CFR 81.156 - Southern Maryland Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 18 2013-07-01 2013-07-01 false Southern Maryland Intrastate Air... Air Quality Control Regions § 81.156 Southern Maryland Intrastate Air Quality Control Region. The Southern Maryland Intrastate Air Quality Control Region consists of the territorial area encompassed by...

  13. 78 FR 9717 - Maryland; Amendment No. 3 to Notice of a Major Disaster Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-11

    ... SECURITY Federal Emergency Management Agency Maryland; Amendment No. 3 to Notice of a Major Disaster... notice of a major disaster declaration for the State of Maryland (FEMA-4091-DR), dated November 20, 2012... for the State of Maryland is hereby amended to include the following areas among those...

  14. 30 CFR 920.25 - Approval of Maryland abandoned mine land reclamation plan amendments.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... STATE MARYLAND § 920.25 Approval of Maryland abandoned mine land reclamation plan amendments. The... 30 Mineral Resources 3 2012-07-01 2012-07-01 false Approval of Maryland abandoned mine land reclamation plan amendments. 920.25 Section 920.25 Mineral Resources OFFICE OF SURFACE MINING RECLAMATION...

  15. The NASA Earth Research-2 (ER-2) Aircraft: A Flying Laboratory for Earth Science Studies

    NASA Technical Reports Server (NTRS)

    Navarro, Robert

    2007-01-01

    The National Aeronautics and Space Administration Dryden Flight Research Center, Edwards, California, has two Lockheed Martin Corporation (Bethesda, Maryland) Earth Research-2 (ER2) aircraft that serve as high-altitude and long-range flying laboratories. The ER-2 aircraft has been successfully utilized to conduct scientific studies of stratospheric and tropospheric chemistry, land-use mapping, disaster assessment, preliminary testing and calibration and validation of satellite sensors. The research missions for the ER-2 aircraft are planned, implemented, and managed by the Dryden Flight Research Center Science Mission Directorate. Maintenance and instrument payload integration is conducted by Dryden personnel. The ER-2 aircraft provides experimenters with a wide array of payload accommodations areas with suitable environment control with required electrical and mechanical interfaces. Missions may be flown out of Dryden or from remote bases worldwide, according to research requirements. The NASA ER-2 aircraft is utilized by a variety of customers, including U.S. Government agencies, civilian organizations, universities, and state governments. The combination of the ER-2 aircraft s range, endurance, altitude, payload power, payload volume and payload weight capabilities complemented by a trained maintenance and operations team provides an excellent and unique platform system to the science community and other customers.

  16. X-1 aircraft in flight

    NASA Technical Reports Server (NTRS)

    1949-01-01

    The first of the rocket-powered research aircraft, the X-1 (originally designated the XS-1), was a bullet-shaped airplane that was built by the Bell Aircraft Company for the US Air Force and the National Advisory Committee for Aeronautics (NACA). The mission of the X-1 was to investigate the transonic speed range (speeds from just below to just above the speed of sound) and, if possible, to break the 'sound barrier'. The first of the three X-1s was glide-tested at Pinecastle Field, FL, in early 1946. The first powered flight of the X-1 was made on Dec. 9, 1946, at Muroc Army Air Field (later redesignated Edwards Air Force Base) with Chalmers Goodlin, a Bell test pilot,at the controls. On Oct. 14, 1947, with USAF Captain Charles 'Chuck' Yeager as pilot, the aircraft flew faster than the speed of sound for the first time. Captain Yeager ignited the four-chambered XLR-11 rocket engines after being air-launched from under the bomb bay of a B-29 at 21,000 ft. The 6,000-lb thrust ethyl alcohol/liquid oxygen burning rockets, built by Reaction Motors, Inc., pushed him up to a speed of 700 mph in level flight. Captain Yeager was also the pilot when the X-1 reached its maximum speed of 957 mph. Another USAF pilot. Lt. Col. Frank Everest, Jr., was credited with taking the X-1 to its maximum altitude of 71,902 ft. Eighteen pilots in all flew the X-1s. The number three plane was destroyed in a fire before evermaking any powered flights. A single-place monoplane, the X-1 was 31 ft long, 10 ft high, and had a wingspan of 29 ft. It weighed 4,900 lb and carried 8,200 lb of fuel. It had a flush cockpit with a side entrance and no ejection seat. The following movie runs about 20 seconds, and shows several air-to-air views of X-1 Number 2 and its modified B-50 mothership. It begins with different angles of the X-1 in-flight while mated to the B-50's bomb bay, and ends showing the air-launch. The X-1 drops below the B-50, then accelerates away as the rockets ignite.

  17. IDENTIFICATION OF AIRCRAFT HAZARDS

    SciTech Connect

    K.L. Ashley

    2005-03-23

    Aircraft hazards were determined to be potentially applicable to a repository at Yucca Mountain in the ''Monitored Geological Repository External Events Hazards Screening Analysis'' (BSC 2004, Section 6.4.1). That determination was conservatively based on limited knowledge of flight data in the area of concern and on crash data for aircraft of the type flying near Yucca Mountain. The purpose of this report is to identify specific aircraft hazards that may be applicable to a Monitored Geologic Repository (MGR) at Yucca Mountain using NUREG-0800, ''Standard Review Plan for the Review of Safety Analysis Reports for Nuclear Power Plants'' (NRC 1987, Section 3.5.1.6), as guidance for the inclusion or exclusion of identified aircraft hazards. NUREG-0800 is being used here as a reference because some of the same considerations apply. The intended use of this report is to provide inputs for further screening and analysis of the identified aircraft hazards based on the criteria that apply to Category 1 and 2 event sequence analyses as defined in 10 CFR 63.2 (see Section 4). The scope of this technical report includes the evaluation of military, private, and commercial use of airspace in the 100-mile regional setting of the MGR at Yucca Mountain with the potential for reducing the regional setting to a more manageable size after consideration of applicable screening criteria (see Section 7).

  18. High altitude reconnaissance aircraft

    NASA Technical Reports Server (NTRS)

    Yazdo, Renee Anna; Moller, David

    1990-01-01

    At the equator the ozone layer ranges from 65,000 to 130,000 plus feet, which is beyond the capabilities of the ER-2, NASA's current high altitude reconnaissance aircraft. The Universities Space Research Association, in cooperation with NASA, is sponsoring an undergraduate program which is geared to designing an aircraft that can study the ozone layer at the equator. This aircraft must be able to cruise at 130,000 feet for six hours at Mach 0.7, while carrying 3,000 lbs. of payload. In addition, the aircraft must have a minimum range of 6,000 miles. In consideration of the novel nature of this project, the pilot must be able to take control in the event of unforeseen difficulties. Three aircraft configurations were determined to be the most suitable - a joined-wing, a biplane, and a twin-boom conventional airplane. The performance of each configuration was analyzed to investigate the feasibility of the project.

  19. Aircraft control position indicator

    NASA Technical Reports Server (NTRS)

    Dennis, Dale V. (Inventor)

    1987-01-01

    An aircraft control position indicator was provided that displayed the degree of deflection of the primary flight control surfaces and the manner in which the aircraft responded. The display included a vertical elevator dot/bar graph meter display for indication whether the aircraft will pitch up or down, a horizontal aileron dot/bar graph meter display for indicating whether the aircraft will roll to the left or to the right, and a horizontal dot/bar graph meter display for indicating whether the aircraft will turn left or right. The vertical and horizontal display or displays intersect to form an up/down, left/right type display. Internal electronic display driver means received signals from transducers measuring the control surface deflections and determined the position of the meter indicators on each dot/bar graph meter display. The device allows readability at a glance, easy visual perception in sunlight or shade, near-zero lag in displaying flight control position, and is not affected by gravitational or centrifugal forces.

  20. Aircraft noise synthesis system

    NASA Technical Reports Server (NTRS)

    Mccurdy, David A.; Grandle, Robert E.

    1987-01-01

    A second-generation Aircraft Noise Synthesis System has been developed to provide test stimuli for studies of community annoyance to aircraft flyover noise. The computer-based system generates realistic, time-varying, audio simulations of aircraft flyover noise at a specified observer location on the ground. The synthesis takes into account the time-varying aircraft position relative to the observer; specified reference spectra consisting of broadband, narrowband, and pure-tone components; directivity patterns; Doppler shift; atmospheric effects; and ground effects. These parameters can be specified and controlled in such a way as to generate stimuli in which certain noise characteristics, such as duration or tonal content, are independently varied, while the remaining characteristics, such as broadband content, are held constant. The system can also generate simulations of the predicted noise characteristics of future aircraft. A description of the synthesis system and a discussion of the algorithms and methods used to generate the simulations are provided. An appendix describing the input data and providing user instructions is also included.

  1. Aircraft Operations Classification System

    NASA Technical Reports Server (NTRS)

    Harlow, Charles; Zhu, Weihong

    2001-01-01

    Accurate data is important in the aviation planning process. In this project we consider systems for measuring aircraft activity at airports. This would include determining the type of aircraft such as jet, helicopter, single engine, and multiengine propeller. Some of the issues involved in deploying technologies for monitoring aircraft operations are cost, reliability, and accuracy. In addition, the system must be field portable and acceptable at airports. A comparison of technologies was conducted and it was decided that an aircraft monitoring system should be based upon acoustic technology. A multimedia relational database was established for the study. The information contained in the database consists of airport information, runway information, acoustic records, photographic records, a description of the event (takeoff, landing), aircraft type, and environmental information. We extracted features from the time signal and the frequency content of the signal. A multi-layer feed-forward neural network was chosen as the classifier. Training and testing results were obtained. We were able to obtain classification results of over 90 percent for training and testing for takeoff events.

  2. Identification of Aircraft Hazards

    SciTech Connect

    K. Ashley

    2006-12-08

    Aircraft hazards were determined to be potentially applicable to a repository at Yucca Mountain in ''Monitored Geological Repository External Events Hazards Screening Analysis'' (BSC 2005 [DIRS 174235], Section 6.4.1). That determination was conservatively based upon limited knowledge of flight data in the area of concern and upon crash data for aircraft of the type flying near Yucca Mountain. The purpose of this report is to identify specific aircraft hazards that may be applicable to a monitored geologic repository (MGR) at Yucca Mountain, using NUREG-0800, ''Standard Review Plan for the Review of Safety Analysis Reports for Nuclear Power Plants'' (NRC 1987 [DIRS 103124], Section 3.5.1.6), as guidance for the inclusion or exclusion of identified aircraft hazards. The intended use of this report is to provide inputs for further screening and analysis of identified aircraft hazards based upon the criteria that apply to Category 1 and Category 2 event sequence analyses as defined in 10 CFR 63.2 [DIRS 176544] (Section 4). The scope of this report includes the evaluation of military, private, and commercial use of airspace in the 100-mile regional setting of the repository at Yucca Mountain with the potential for reducing the regional setting to a more manageable size after consideration of applicable screening criteria (Section 7).

  3. Aircraft icing instrumentation: Unfilled needs. [rotary wing aircraft

    NASA Technical Reports Server (NTRS)

    Kitchens, P. F.

    1980-01-01

    A list of icing instrumentation requirements are presented. Because of the Army's helicopter orientation, many of the suggestions are specific to rotary wing aircraft; however, some of the instrumentation are also suitable for general aviation aircraft.

  4. Scaling aircraft noise perception.

    NASA Technical Reports Server (NTRS)

    Ollerhead, J. B.

    1973-01-01

    Following a brief review of the background to the study, an extensive experiment is described which was undertaken to assess the practical differences between numerous alternative methods for calculating the perceived levels of individual aircraft flyover wounds. One hundred and twenty recorded sounds, including jets, turboprops, piston aircraft and helicopters were rated by a panel of subjects in a pair comparison test. The results were analyzed to evaluate a number of noise rating procedures, in terms of their ability to accurately estimate both relative and absolute perceived noise levels over a wider dynamic range (84-115 dB SPL) than had generally been used in previous experiments. Performances of the different scales were examined in detail for different aircraft categories, and the merits of different band level summation procedures, frequency weighting functions, duration and tone corrections were investigated.

  5. Alternative aircraft fuels technology

    NASA Technical Reports Server (NTRS)

    Grobman, J.

    1976-01-01

    NASA is studying the characteristics of future aircraft fuels produced from either petroleum or nonpetroleum sources such as oil shale or coal. These future hydrocarbon based fuels may have chemical and physical properties that are different from present aviation turbine fuels. This research is aimed at determining what those characteristics may be, how present aircraft and engine components and materials would be affected by fuel specification changes, and what changes in both aircraft and engine design would be required to utilize these future fuels without sacrificing performance, reliability, or safety. This fuels technology program was organized to include both in-house and contract research on the synthesis and characterization of fuels, component evaluations of combustors, turbines, and fuel systems, and, eventually, full-scale engine demonstrations. A review of the various elements of the program and significant results obtained so far are presented.

  6. Transport aircraft accident dynamics

    NASA Technical Reports Server (NTRS)

    Cominsky, A.

    1982-01-01

    A study was carried out of 112 impact survivable jet transport aircraft accidents (world wide) of 27,700 kg (60,000 lb.) aircraft and up extending over the last 20 years. This study centered on the effect of impact and the follow-on events on aircraft structures and was confined to the approach, landing and takeoff segments of the flight. The significant characteristics, frequency of occurrence and the effect on the occupants of the above data base were studied and categorized with a view to establishing typical impact scenarios for use as a basis of verifying the effectiveness of potential safety concepts. Studies were also carried out of related subjects such as: (1) assessment of advanced materials; (2) human tolerance to impact; (3) merit functions for safety concepts; and (4) impact analysis and test methods.

  7. 78 FR 20227 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-04

    ... to revise AD 2004-21-08, amendment 39-13828 (69 FR 62396, October 26, 2004). That AD applies to the specified products. The NPRM published in the Federal Register on January 8, 2013 (78 FR 1155). That NPRM... public the opportunity to participate in developing this AD. We received no comments on the NPRM (78...

  8. 78 FR 1155 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-08

    ... 2004-21-08, amendment 39-13828 (69 FR 62396, October 26, 2004), for all Cessna Models 190, 195 (L- 126A... terminate the need for the repetitive inspections. AD 2004-21-08 (69 FR 62396, October 26, 2004) resulted... is known to be susceptible to corrosion. We issued AD 2004-21-08 (69 FR 62396, October 26, 2004)...

  9. 77 FR 72778 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-06

    ... in the Federal Register on August 22, 2012 (77 FR 50644). That NPRM proposed to require inspection of... brushes. Actions Since Previous NPRM Was Issued Since we issued the previous NPRM (77 FR 50644, August 22... public the opportunity to comment on the previous NPRM (77 FR 50644, August 22, 2012). The...

  10. 78 FR 24343 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-25

    ... apply to the specified products. That SNPRM published in the Federal Register on December 6, 2012 (77 FR 72778). The original NPRM (77 FR 50644, August 22, 2012) proposed to require inspection of the number of... with the intent that was proposed in the SNPRM (77 FR 72778, December 6, 2012) for correcting...

  11. 77 FR 37827 - Airworthiness Directives; The Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-25

    ... Rulemaking On January 28, 2011, we issued AD 2011-03-16, Amendment 39-16600 (76 FR 8607, February 15, 2011... Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska...) generator overvoltage events. This proposed AD would require replacing the auxiliary power unit...

  12. 77 FR 57994 - Airworthiness Directives; The Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-19

    ... published in the Federal Register on June 25, 2012 (77 FR 37827). That NPRM proposed to require replacing... opportunity to participate in developing this AD. We received no comments on the NPRM (77 FR 37827, June 25... 12866, (2) Is not a ``significant rule'' under DOT Regulatory Policies and Procedures (44 FR...

  13. 77 FR 69742 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-21

    .... That SNPRM published in the Federal Register on August 23, 2012 (77 FR 50954). The original NPRM (75 FR... of the flap control system. The SNPRM (77 FR 50954, August 23, 2012) proposed to incorporate... this AD. We received no comments on the SNPRM (77 FR 50954, August 23, 2012) or on the determination...

  14. 78 FR 32349 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-30

    ... Register on February 11, 2013 (78 FR 9636). The original NPRM (77 FR 59146, September 26, 2012) proposed to... received no comments on the SNPRM (78 FR 9636, February 11, 2013) or on the determination of the cost to... these minor changes: Are consistent with the intent that was proposed in the SNPRM (78 FR 9636,...

  15. 78 FR 9636 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-11

    ... Federal Register on September 26, 2012 (77 FR 59146). That NPRM proposed to require an inspection to... conditioner; and return of replaced brushes to Cessna. Actions Since Previous NPRM (77 FR 59146, September 26, 2012) Was Issued Since we issued the previous NPRM (77 FR 59146, September 26, 2012), Cessna...

  16. 77 FR 60062 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-02

    .... The existing AD currently requires an inspection of the engine oil pressure switch and, if applicable, replacement of the engine oil pressure switch. Since we issued that AD, we have received new reports of internal failure of the engine oil pressure switch, which could result in complete loss of engine oil...

  17. 78 FR 38552 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-27

    ... Component (JASC)/Air Transport Association (ATA) of America Code 7931, Engine Oil Pressure. (e) Unsafe... the engine oil pressure switch and, if applicable, replacement of the engine oil pressure switch. This... engine oil pressure switch, and requires replacement when the engine oil pressure switch reaches its...

  18. 77 FR 26156 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-03

    ... 19, 2012 (77 FR 2659). That NPRM proposed to require an inspection of the torque lug and surrounding... comments on the NPRM (77 FR 2659, January 19, 2012) or on the determination of the cost to the public... of the NPRM (77 FR 2659, January 19, 2012) as paragraph (h) of this final rule. We also revised...

  19. 77 FR 50054 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-20

    ... receive about this proposed AD. Discussion In January 2012, we issued AD 2012-02-02 (77 FR 6003, February... 172S airplanes that have installed an engine fuel return system modification kit. AD 2012-02-02 (77 FR... Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in Alaska and (4)...

  20. 76 FR 70379 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-14

    .... Discussion On January 22, 2008, we issued AD 2008-03-02, Amendment 39-15351 (73 FR 5737, January 31, 2008... Issued Since we issued AD 2008-03-02 (73 FR 5737, January 31, 2008), we received a field report of a fuel... (73 FR 5737, January 31, 2008). This proposed AD would add airplanes to the applicability statement...

  1. 77 FR 16432 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-21

    ... NPRM was published in the Federal Register on December 30, 2011 (76 FR 82205). That NPRM proposed to... received. The National Transportation Safety Board supports the NPRM (76 FR 82205, December 30, 2011... determined that these minor changes: Are consistent with the intent that was proposed in the NPRM (76...

  2. 78 FR 37448 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-21

    ... specified products. That ] NPRM published in the Federal Register on December 21, 2012 (77 FR 75590). That...), requested we withdraw the NPRM (77 FR 75590, December 21, 2012) because it is unnecessary, does not add to... (77 FR 75590, December 21, 2012) for correcting the unsafe condition; and Do not add any...

  3. 77 FR 72250 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-05

    ... receive about this proposed AD. Discussion In January 2012, we issued AD 2012-02-02 (77 FR 6003, February 7, 2012), and in October 2012, we issued AD 2012-22-01 (77 FR 70114, November 23, 2012) for certain... Policies and Procedures (44 FR 11034, February 26, 1979), (3) Will not affect intrastate aviation in...

  4. 77 FR 6003 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-07

    ... certain other publication listed in this AD as of March 6, 2008 (73 FR 5737, January 31, 2008). ADDRESSES... proposed rulemaking (NPRM) to amend 14 CFR part 39 to supersede AD 2008-03-02, Amendment 39-15351 (73 FR... Register on November 14, 2011 (76 FR 70379). That NPRM proposed to continue to require actions of...

  5. 78 FR 9796 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-12

    ... December 5, 2012 (77 FR 72250). That NPRM proposed to require you to install the forward and aft fuel... (77 FR 72250, December 5, 2012) or on the determination of the cost to the public. Conclusion We... consistent with the intent that was proposed in the NPRM (77 FR 72250, December 5, 2012) for correcting...

  6. 78 FR 24985 - Airworthiness Directives; Cessna Aircraft Company Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-29

    ... . SUPPLEMENTARY INFORMATION: AD 2004-21-08 R1, amendment 39-17400 (78 FR 20227, April 4, 2013), currently requires... stated in the comments section that we received no comments on the NPRM (78 FR 1155, January 8, 2013). We... comments on the NPRM (78 FR 1155, January 8, 2013) or on the determination of the cost to the public.''...

  7. Pathfinder aircraft in flight

    NASA Technical Reports Server (NTRS)

    1996-01-01

    The Pathfinder research aircraft's solar cell arrays are prominently displayed as it touches down on the bed of Rogers Dry Lake at the Dryden Flight Research Center, Edwards, California, following a test flight. The solar arrays covered more than 75 percent of Pathfinder's upper wing surface, and provided electricity to power its six electric motors, flight controls, communications links and a host of scientific sensors. Pathfinder was a lightweight, solar-powered, remotely piloted flying wing aircraft used to demonstrate the use of solar power for long-duration, high-altitude flight. Its name denotes its mission as the 'Pathfinder' or first in a series of solar-powered aircraft that will be able to remain airborne for weeks or months on scientific sampling and imaging missions. Solar arrays covered most of the upper wing surface of the Pathfinder aircraft. These arrays provided up to 8,000 watts of power at high noon on a clear summer day. That power fed the aircraft's six electric motors as well as its avionics, communications, and other electrical systems. Pathfinder also had a backup battery system that could provide power for two to five hours, allowing for limited-duration flight after dark. Pathfinder flew at airspeeds of only 15 to 20 mph. Pitch control was maintained by using tiny elevators on the trailing edge of the wing while turns and yaw control were accomplished by slowing down or speeding up the motors on the outboard sections of the wing. On September 11, 1995, Pathfinder set a new altitude record for solar-powered aircraft of 50,567 feet above Edwards Air Force Base, California, on a 12-hour flight. On July 7, 1997, it set another, unofficial record of 71,500 feet at the Pacific Missile Range Facility, Kauai, Hawaii. In 1998, Pathfinder was modified into the longer-winged Pathfinder Plus configuration. (See the Pathfinder Plus photos and project description.)

  8. Pathfinder aircraft in flight

    NASA Technical Reports Server (NTRS)

    1996-01-01

    The unique Pathfinder solar-powered flying wing, is shown during a checkout flight from the Dryden Flight Research Center, Edwards, California. This two-hour low-altitude flight over Rogers Dry Lake, Nov. 19, 1996, served to test aircraft systems and functional procedures, according to officials of AeroVironment, Inc., Pathfinder's developer and operator. Pathfinder was a lightweight, solar-powered, remotely piloted flying wing aircraft used to demonstrate the use of solar power for long-duration, high-altitude flight. Its name denotes its mission as the 'Pathfinder' or first in a series of solar-powered aircraft that will be able to remain airborne for weeks or months on scientific sampling and imaging missions. Solar arrays covered most of the upper wing surface of the Pathfinder aircraft. These arrays provided up to 8,000 watts of power at high noon on a clear summer day. That power fed the aircraft's six electric motors as well as its avionics, communications, and other electrical systems. Pathfinder also had a backup battery system that could provide power for two to five hours, allowing for limited-duration flight after dark. Pathfinder flew at airspeeds of only 15 to 20 mph. Pitch control was maintained by using tiny elevators on the trailing edge of the wing while turns and yaw control were accomplished by slowing down or speeding up the motors on the outboard sections of the wing. On September 11, 1995, Pathfinder set a new altitude record for solar-powered aircraft of 50,567 feet above Edwards Air Force Base, California, on a 12-hour flight. On July 7, 1997, it set another, unofficial record of 71,500 feet at the Pacific Missile Range Facility, Kauai, Hawaii. In 1998, Pathfinder was modified into the longer-winged Pathfinder Plus configuration. (See the Pathfinder Plus photos and project description.)

  9. Pathfinder aircraft in flight

    NASA Technical Reports Server (NTRS)

    1996-01-01

    The Pathfinder solar-powered research aircraft heads for landing on the bed of Rogers Dry Lake at the Dryden Flight Research Center, Edwards, California, after a successful test flight Nov. 19, 1996. Pathfinder was a lightweight, solar-powered, remotely piloted flying wing aircraft used to demonstrate the use of solar power for long-duration, high-altitude flight. Its name denotes its mission as the 'Pathfinder' or first in a series of solar-powered aircraft that will be able to remain airborne for weeks or months on scientific sampling and imaging missions. Solar arrays covered most of the upper wing surface of the Pathfinder aircraft. These arrays provided up to 8,000 watts of power at high noon on a clear summer day. That power fed the aircraft's six electric motors as well as its avionics, communications, and other electrical systems. Pathfinder also had a backup battery system that could provide power for two to five hours, allowing for limited-duration flight after dark. Pathfinder flew at airspeeds of only 15 to 20 mph. Pitch control was maintained by using tiny elevators on the trailing edge of the wing while turns and yaw control were accomplished by slowing down or speeding up the motors on the outboard sections of the wing. On September 11, 1995, Pathfinder set a new altitude record for solar-powered aircraft of 50,567 feet above Edwards Air Force Base, California, on a 12-hour flight. On July 7, 1997, it set another, unofficial record of 71,500 feet at the Pacific Missile Range Facility, Kauai, Hawaii. In 1998, Pathfinder was modified into the longer-winged Pathfinder Plus configuration. (See the Pathfinder Plus photos and project description.)

  10. Pathfinder aircraft in flight

    NASA Technical Reports Server (NTRS)

    1996-01-01

    The Pathfinder solar-powered research aircraft is silhouetted against a clear blue sky as it soars aloft during a checkout flight from the Dryden Flight Research Center, Edwards, California, November, 1996. Pathfinder was a lightweight, solar-powered, remotely piloted flying wing aircraft used to demonstrate the use of solar power for long-duration, high-altitude flight. Its name denotes its mission as the 'Pathfinder' or first in a series of solar-powered aircraft that will be able to remain airborne for weeks or months on scientific sampling and imaging missions. Solar arrays covered most of the upper wing surface of the Pathfinder aircraft. These arrays provided up to 8,000 watts of power at high noon on a clear summer day. That power fed the aircraft's six electric motors as well as its avionics, communications, and other electrical systems. Pathfinder also had a backup battery system that could provide power for two to five hours, allowing for limited-duration flight after dark. Pathfinder flew at airspeeds of only 15 to 20 mph. Pitch control was maintained by using tiny elevators on the trailing edge of the wing while turns and yaw control were accomplished by slowing down or speeding up the motors on the outboard sections of the wing. On September 11, 1995, Pathfinder set a new altitude record for solar-powered aircraft of 50,567 feet above Edwards Air Force Base, California, on a 12-hour flight. On July 7, 1997, it set another, unofficial record of 71,500 feet at the Pacific Missile Range Facility, Kauai, Hawaii. In 1998, Pathfinder was modified into the longer-winged Pathfinder Plus configuration. (See the Pathfinder Plus photos and project description.)

  11. Pathfinder aircraft flight

    NASA Technical Reports Server (NTRS)

    1996-01-01

    The Pathfinder research aircraft's wing structure is clearly defined as it soars under a clear blue sky during a test flight from Dryden Flight Research Center, Edwards, California, in November of 1996. Pathfinder was a lightweight, solar-powered, remotely piloted flying wing aircraft used to demonstrate the use of solar power for long-duration, high-altitude flight. Its name denotes its mission as the 'Pathfinder' or first in a series of solar-powered aircraft that will be able to remain airborne for weeks or months on scientific sampling and imaging missions. Solar arrays covered most of the upper wing surface of the Pathfinder aircraft. These arrays provided up to 8,000 watts of power at high noon on a clear summer day. That power fed the aircraft's six electric motors as well as its avionics, communications, and other electrical systems. Pathfinder also had a backup battery system that could provide power for two to five hours, allowing for limited-duration flight after dark. Pathfinder flew at airspeeds of only 15 to 20 mph. Pitch control was maintained by using tiny elevators on the trailing edge of the wing while turns and yaw control were accomplished by slowing down or speeding up the motors on the outboard sections of the wing. On September 11, 1995, Pathfinder set a new altitude record for solar-powered aircraft of 50,567 feet above Edwards Air Force Base, California, on a 12-hour flight. On July 7, 1997, it set another, unofficial record of 71,500 feet at the Pacific Missile Range Facility, Kauai, Hawaii. In 1998, Pathfinder was modified into the longer-winged Pathfinder Plus configuration. (See the Pathfinder Plus photos and project description.)

  12. Goddard Space Flight Center: 1994 Maryland/GSFC Earth and Environmental Science Teacher Ambassador Program

    NASA Technical Reports Server (NTRS)

    Latham, James

    1995-01-01

    The Maryland/Goddard Space Flight Center (GSFC) Earth and Environmental Science Teacher Ambassador Program was designed to enhance classroom instruction in the Earth and environmental science programs in the secondary schools of the state of Maryland. In October 1992, more than 100 school system administrators from the 24 local Maryland school systems, the Maryland State Department of Education, and the University of Maryland met with NASA GSFC scientists and education officers to propose a cooperative state-wide secondary school science teaching enhancement initiative.

  13. Aircraft engines. II

    SciTech Connect

    Smith, M.G. Jr.

    1988-01-01

    An account is given of the design features and prospective performance gains of ultrahigh bypass subsonic propulsion configurations and various candidate supersonic commercial aircraft powerplants. The supersonic types, whose enhanced thermodynamic cycle efficiency is considered critical to the economic viability of a second-generation SST, are the variable-cycle engine, the variable stream control engine, the turbine-bypass engine, and the supersonic-throughflow fan. Also noted is the turboramjet concept, which will be applicable to hypersonic aircraft whose airframe structure materials can withstand the severe aerothermodynamic conditions of this flight regime.

  14. Aircraft surface coatings

    NASA Technical Reports Server (NTRS)

    1982-01-01

    Liquid, spray on elastomeric polyurethanes are selected and investigated as best candidates for aircraft external protective coatings. Flight tests are conducted to measure drag effects of these coatings compared to paints and a bare metal surface. The durability of two elastometric polyurethanes are assessed in airline flight service evaluations. Laboratory tests are performed to determine corrosion protection properties, compatibility with aircraft thermal anti-icing systems, the effect of coating thickness on erosion durability, and the erosion characteristics of composite leading edges-bare and coated. A cost and benefits assessment is made to determine the economic value of various coating configurations to the airlines.

  15. Alternative aircraft fuels

    NASA Technical Reports Server (NTRS)

    Longwell, J. P.; Grobman, J. S.

    1977-01-01

    The efficient utilization of fossil fuels by future jet aircraft may necessitate the broadening of current aviation turbine fuel specifications. The most significant changes in specifications would be an increased aromatics content and a higher final boiling point in order to minimize refinery energy consumption and costs. These changes would increase the freezing point and might lower the thermal stability of the fuel, and could cause increased pollutant emissions, increased combustor liner temperatures, and poorer ignition characteristics. The effects that broadened specification fuels may have on present-day jet aircraft and engine components and the technology required to use fuels with broadened specifications are discussed.

  16. Solar powered aircraft

    SciTech Connect

    Phillips, W.H.

    1983-11-15

    A cruciform wing structure for a solar powered aircraft is disclosed. Solar cells are mounted on horizontal wing surfaces. Wing surfaces with spanwise axis perpendicular to surfaces maintain these surfaces normal to the sun's rays by allowing aircraft to be flown in a controlled pattern at a large bank angle. The solar airplane may be of conventional design with respect to fuselage, propeller and tail, or may be constructed around a core and driven by propeller mechanisms attached near the tips of the airfoils.

  17. Solar powered aircraft

    NASA Technical Reports Server (NTRS)

    Phillips, W. H. (Inventor)

    1983-01-01

    A cruciform wing structure for a solar powered aircraft is disclosed. Solar cells are mounted on horizontal wing surfaces. Wing surfaces with spanwise axis perpendicular to surfaces maintain these surfaces normal to the Sun's rays by allowing aircraft to be flown in a controlled pattern at a large bank angle. The solar airplane may be of conventional design with respect to fuselage, propeller and tail, or may be constructed around a core and driven by propeller mechanisms attached near the tips of the airfoils.

  18. Aircraft Laminar Flow Control

    NASA Technical Reports Server (NTRS)

    Joslin, Ronald D.

    1998-01-01

    Aircraft laminar flow control (LFC) from the 1930's through the 1990's is reviewed and the current status of the technology is assessed. Examples are provided to demonstrate the benefits of LFC for subsonic and supersonic aircraft. Early studies related to the laminar boundary-layer flow physics, manufacturing tolerances for laminar flow, and insect-contamination avoidance are discussed. LFC concept studies in wind-tunnel and flight experiments are the major focus of the paper. LFC design tools are briefly outlined for completeness.

  19. Selected Financial and Enrollment Data: Maryland Community Colleges.

    ERIC Educational Resources Information Center

    Maryland State Board for Community Colleges, Annapolis.

    The data provided in this report offer information about the enrollment and financing of community colleges in Maryland. Section I reviews enrollments in postsecondary education between 1955 and 1981, percentages of residents enrolled in colleges by city or county, birth rates between 1960 and 1980, and actual and projected figures for high school…

  20. Female Faculty Salary Equity Study: University of Maryland, College Park.

    ERIC Educational Resources Information Center

    Hurley, Rodney G.; And Others

    Salary differences between full-time male and female faculty members who hold a doctoral degree were studied at the University of Maryland, College Park, in 1979. The full-time instructional and research faculty having the rank of professor, associate professor, or assistant professor who possess a doctoral degree totaled 1,199 (1,010 males and…

  1. TESTING OF INDOOR RADON REDUCTION TECHNIQUES IN 19 MARYLAND HOUSES

    EPA Science Inventory

    The report gives results of testing of indoor radon reduction techniques in 19 existing houses in Maryland. The focus was on passive measures: various passive soil depressurization methods, where natural wind and temperature effects are utilized to develop suction in the system; ...

  2. Vascular flora of Douglas Point, Charles County, Maryland. Final report

    SciTech Connect

    Miles, K.J.

    1980-01-01

    The environment and vascular flora of a 561 hectare (1400 acre) site on the western shore of the Chesapeake Bay in Maryland are described. Six habitats are represented: mixed hardwood forest, pine forest, open field, freshwater marsh, shrub swamp, and tree swamp. An annotated list of 531 species is included.

  3. A LANDSCAPE DEVELOPMENT INTENSITY MAP OF MARYLAND, USA

    EPA Science Inventory

    We present a map of human development intensity for central and eastern Maryland using an index derived from energy systems principles. Brown and Vivas developed a measure of the intensity of human development based on the nonrenewable energy use per unit area as an index to exp...

  4. The Library Media Program: A Maryland Curricular Framework.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore. Div. of Library Development and Services.

    This publication provides guidelines designed to assist Maryland library media administrators and specialists in planning, developing, and implementing kindergarten through twelfth grade library media programs. It provides a broad outline from which local systems may construct library media programs integrated with other curricular units. The…

  5. Economic Impacts of Maryland Community Colleges: A Closer Look.

    ERIC Educational Resources Information Center

    Linthicum, Dorothy S.

    The short-term impacts of public community colleges upon the business and government sectors of Maryland's economy were measured through a series of linear cash-flow formulas. In 1976-77, total direct and indirect expenditures attributable to the 17 colleges in areas of salaries, purchase of materials, and capital building improvements were almost…

  6. ACT Profile Report: State. Graduating Class 2012. Maryland

    ERIC Educational Resources Information Center

    ACT, Inc., 2012

    2012-01-01

    This report provides information about the performance of Maryland's 2012 graduating seniors who took the ACT as sophomores, juniors, or seniors; and self-reported at the time of testing that they were scheduled to graduate in 2012 and tested under standard time conditions. This report focuses on: (1) Performance: student test performance in the…

  7. Students' Perceptions of a Maryland State Performance Assessment

    ERIC Educational Resources Information Center

    Parke, Carol S.; Lane, Suzanne

    2007-01-01

    The purpose of the study reported in this article was to provide empirical evidence of students' views about a state performance assessment and its effects in science and social studies classrooms in Maryland. We developed 2 student questionnaires, 1 for each subject, and administered them to a statewide, stratified random sample of students in…

  8. Maryland Adult English as a Second Language Program Standards.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore. Adult Continuing Education Section.

    This document is an official statement of the State of Maryland, outlining in detail the state's adult English-as-a-Second-Language (ESL) program standards. The standards are not specific instructional standards, but rather overall guidelines for identifying and improving major components of quality adult ESL programs. The document has three…

  9. Career Education in Appalachian Maryland. Investigation and Decision Making: Science.

    ERIC Educational Resources Information Center

    Tri-County Career Education Task Force, Oakland, MD.

    The science curriculum activities presented in this guide were developed as one component of a total career education demonstration project for Appalachian Maryland, and are intended for use as supplements to the total middle or junior high school curriculum. Introductory material lists career education concepts and outlines career and…

  10. The Private Management of Public Schools: The Baltimore, Maryland, Experience.

    ERIC Educational Resources Information Center

    Doughty, Sherri

    In 1992 the Baltimore City Public School District (Maryland) entered into a 5-year contract with Education Alternatives, Incorporated (EAI), to manage 9 of its schools. Baltimore's private-management model differed significantly from that of Dade County, Florida, in that EAI was given overall management responsibility. Data were gathered through a…

  11. Evaluation of Stress Management Education: The University of Maryland Model.

    ERIC Educational Resources Information Center

    Allen, Roger J.

    This study evaluated the efficacy of the undergraduate service program "Controlling Stress & Tension" at the University of Maryland in terms of improving the health status of participants across biomedical stress reactivity and psychometric variables. Six hundred fifty-three participants were compared to 264 control subjects for pre- to…

  12. A Survey of Collaborative Projects of Maryland Postsecondary Institutions.

    ERIC Educational Resources Information Center

    Maryland State Higher Education Commission, Annapolis.

    This report, prepared at the request of an informal Maryland higher education workgroup called "A United Voice for Higher Education," is a summary of various campus collaborative activities. Activities were grouped in the following categories: academic, including joint degree programs, articulation programs, and distance learning partnerships;…

  13. Maryland Statewide Plan for Postsecondary Education. First Annual Review.

    ERIC Educational Resources Information Center

    Maryland State Board for Higher Education, Annapolis.

    The review of the Maryland statewide plan for postsecondary education was designed to identify and analyze issues confronting postsecondary education that were not contained in the initial plan and to evaluate progress made in carrying out recommendations in the initial plan. After an introduction, Chapter Two focuses on four new planning…

  14. National Environmental/Energy Workforce Assessment for Maryland.

    ERIC Educational Resources Information Center

    National Field Research Center Inc., Iowa City, IA.

    This report presents existing workforce levels, training programs and career potentials and develops staffing level projections (1976-1982) based on available information for the State of Maryland. The study concerns itself with the environmental pollution control areas of air, noise, potable water, pesticides, radiation, solid waste, wastewater,…

  15. Maryland Health and Higher Educational Facilities Authority. 1996 Annual Report.

    ERIC Educational Resources Information Center

    Maryland State Health and Higher Educational Facilities Authority, Baltimore.

    The Maryland Health and Higher Educational Facilities Authority performs various functions including: issuing bonds and bond anticipation notes; fixing rates and collecting user rents and fees; constructing, acquiring, and maintaining institutional projects; contracting for operation and maintenance of projects; establishing rules and regulations…

  16. Classroom Breakfast: Helping Maryland Students Make the Grade.

    ERIC Educational Resources Information Center

    Terry, Sheila G.; Kerry, Kimberly

    In Fall 1998, the Maryland State Department of Education and six local school systems started a pilot program to evaluate the impact of serving breakfast to students in the classroom as part of the school day. Students in participating schools have an opportunity to eat breakfast in their classroom each day at no charge, regardless of family…

  17. Freshmen Expectations of the University of Maryland, 1971-72.

    ERIC Educational Resources Information Center

    Horowitz, Joseph L.; Sedlacek, William E.

    The present study had as its purpose to determine incoming freshmen expectations of the University of Maryland. Two models of the College and University Environment Scales (CUES) were utilized in the study, and the data were analyzed to determine the relationship between CUES I and CUES II results, between 1969 and 1971 freshmen perceptions, and…

  18. Where Do You Go from Nowhere: Homelessness in Maryland.

    ERIC Educational Resources Information Center

    Health and Welfare Council of Central Maryland, Inc., Baltimore.

    This report assesses the extent of homelessness in Maryland. Data are provided in the following areas: (1) the number of homeless people; (2) causes of homelessness; (3) distribution of the homeless and characteristics of those sheltered; (4) shelter beds available; (5) what is needed to address the problems of homelessness; (6) the extent of the…

  19. Tax-Credit Scholarships in Maryland: Forecasting the Fiscal Impact

    ERIC Educational Resources Information Center

    Gottlob, Brian

    2010-01-01

    This study seeks to inform the debate over a proposal in Maryland to give tax credits to businesses for contributions to organizations that provide scholarships to K-12 private schools or which contribute to innovative educational programs in the public schools. The study constructs a model to determine the fiscal impact of a tax-credit…

  20. The Comprehensive Plan for the Maryland School Performance Program.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore.

    This comprehensive statewide plan was developed to revitalize the Maryland educational system on the school, school system, and state levels by 1992. The plan incorporates the following elements: (1) a set of data-based areas that are considered most useful to inform and guide the school's instructional results for each student; (2) a computerized…

  1. Implications of Proposed University of Maryland System Patenting Policy Change.

    ERIC Educational Resources Information Center

    Clinch, Richard

    As a result of actual and anticipated growth in the level of entrepreneurial activities within the University of Maryland System (UMS), and corresponding growth in licensing and royalty revenues, a threshold policy was recommended in the Joint Chairmen's Report of 1996. Such a policy would establish a maximum threshold beyond which a portion of…

  2. Maryland and the Southern Regional Education Board, December 2014

    ERIC Educational Resources Information Center

    Southern Regional Education Board (SREB), 2014

    2014-01-01

    This report details Maryland's participation in Southern Regional Education Board (SREB) programs and services from December 2013 through November 2014. Appropriations from member states support SREB's core operations and general services. SREB leverages the long-standing commitment of member states to attract external funding for an array of…

  3. Accelerating the College and Career Readiness of Maryland's Students

    ERIC Educational Resources Information Center

    Alliance for Excellent Education, 2011

    2011-01-01

    Maryland is in the process of transitioning to new English language arts and mathematics standards that will better prepare students to be successful in college and their careers. Time, effort, and resources must be dedicated to effective implementation in order to realize the promise of these new common core state standards. This paper captures…

  4. Night Owl: Maryland's After-Hours Reference Service.

    ERIC Educational Resources Information Center

    Duke, Deborah C.

    1994-01-01

    Discusses "Night Owl," a Maryland public library's after hours telephone reference service. Issues include project start-up, user profiles, types of questions, volume, after hours reference accessibility, security, costs, service limits, publicity, staffing, and employee turnover. Similar services in other states are cited. (Contains six…

  5. Enrollment Projections, 2002-2011: Maryland Public Colleges and Universities.

    ERIC Educational Resources Information Center

    Keller, Michael

    This document presents enrollment projections for the public colleges and universities in Maryland through the year 2011. These are headcount projections for each higher education institution, with breakdowns by full-and part-time undergraduates and, as applicable, full- and part-time graduate and professional students. Full-time equivalent (FTE)…

  6. Vaccinia virus infections in martial arts gym, Maryland, USA, 2008.

    PubMed

    Hughes, Christine M; Blythe, David; Li, Yu; Reddy, Ramani; Jordan, Carol; Edwards, Cindy; Adams, Celia; Conners, Holly; Rasa, Catherine; Wilby, Sue; Russell, Jamaal; Russo, Kelly S; Somsel, Patricia; Wiedbrauk, Danny L; Dougherty, Cindy; Allen, Christopher; Frace, Mike; Emerson, Ginny; Olson, Victoria A; Smith, Scott K; Braden, Zachary; Abel, Jason; Davidson, Whitni; Reynolds, Mary; Damon, Inger K

    2011-04-01

    Vaccinia virus is an orthopoxvirus used in the live vaccine against smallpox. Vaccinia virus infections can be transmissible and can cause severe complications in those with weakened immune systems. We report on a cluster of 4 cases of vaccinia virus infection in Maryland, USA, likely acquired at a martial arts gym.

  7. Maryland English Journal, Volume 30, Numbers 1-2.

    ERIC Educational Resources Information Center

    Pula, Judith J., Ed.

    1996-01-01

    The two issues of this journal contain articles about aspects of English teaching and samples of student work. The Fall 1995 issue contains: "'I Want More Books Like It': Implementing a Reading Workshop in an Urban Classroom with At-Risk Students" (Rebecca Joseph); "Service Learning Prompt for the Maryland Writing Test" (Kathy A. Megyeri); "My…

  8. Selected Financial and Enrollment Data: Maryland Community Colleges.

    ERIC Educational Resources Information Center

    Henard, Kay F.; Adelman, Stanley I.

    The historical and descriptive data provided in this report offer an overview of enrollments and finances in the community colleges of Maryland. Section 1 reviews enrollments in postsecondary education between 1955 and 1982, percentages of residents enrolled in colleges by city or county, birth rates between 1961 and 1981, and actual and projected…

  9. Reactive Sequences in the Evolution of Maryland's Consequential Accountability Regime

    ERIC Educational Resources Information Center

    Mawhinney, Hanne B.

    2013-01-01

    An institutional analysis is presented of the policy, political, and legislative events associated with the failure of an attempt in 2006 by the state of Maryland to take control of 11 schools in Baltimore City and turn them over to independent managers or into charter schools under No Child Left Behind. The place of the failed…

  10. Optical communications for transport aircraft

    NASA Technical Reports Server (NTRS)

    Stengel, Robert

    1994-01-01

    Optical communications for transport aircraft are discussed. The problem involves: increasing demand for radio-frequency bands from an enlarging pool of users (aircraft, ground and sea vehicles, fleet operators, traffic control centers, and commercial radio and television); desirability of providing high-bandwidth dedicated communications to and from every aircraft in the National Airspace System; need to support communications, navigation, and surveillance for a growing number of aircraft; and improved meteorological observations by use of probe aircraft. The solution involves: optical signal transmission support very high data rates; optical transmission of signals between aircraft, orbiting satellites, and ground stations, where unobstructed line-of-sight is available; conventional radio transmissions of signals between aircraft and ground stations, where optical line-of-sight is unavailable; and radio priority given to aircraft in weather.

  11. Maryland's Public Charter School Program: Providing High Quality Choices in Public Education. Charter School Annual Report, 2008

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2009

    2009-01-01

    The Maryland General Assembly enacted Maryland's charter school law in 2003. This current school year (2008-2009) marks the sixth year of Maryland's public charter school program. This paper presents the statistics representing the performance of Maryland's public charter schools for the school year 2008-2009.

  12. Light aircraft sound transmission study

    NASA Technical Reports Server (NTRS)

    Atwal, M.; David, J.; Heitman, K.; Crocker, M. J.

    1983-01-01

    The revived interest in the design of propeller driven aircraft is based on increasing fuel prices as well as on the need for bigger short haul and commuter aircraft. A major problem encountered with propeller driven aircraft is propeller and exhaust noise that is transmitted through the fuselage sidewall structure. Part of the work which was conducted during the period April 1 to August 31, 1983, on the studies of sound transmission through light aircraft walls is presented.

  13. Aircraft community noise impact studies

    NASA Technical Reports Server (NTRS)

    1977-01-01

    The objectives of the study are to: (1) conduct a program to determine the community noise impact of advanced technology engines when installed in a supersonic aircraft, (2) determine the potential reduction of community noise by flight operational techniques for the study aircraft, (3) estimate the community noise impact of the study aircraft powered by suppressed turbojet engines and by advanced duct heating turbofan engines, and (4) compare the impact of the two supersonic designs with that of conventional commercial DC-8 aircraft.

  14. Structural health management for aging aircraft

    NASA Astrophysics Data System (ADS)

    Ikegami, Roy; Haugse, Eric D.

    2001-06-01

    An effective structural health management (SHM) system can be a useful tool for making aircraft fleet management decisions ranging from individual aircraft maintenance scheduling and usage restrictions to fleet rotation strategies. This paper discusses the end-user requirements for the elements and architecture of an effective SHM system for application to both military and commercial aging aircraft fleets. The elements discussed include the sensor systems for monitoring and characterizing the health of the structure, data processing methods for interpreting sensor data and converting it into useable information, and automated methods for erroneous data detection, data archiving and information dissemination. Current and past SHM technology development/maturation efforts in these areas at the Boeing Company will be described. An evolutionary technology development strategy is developed in which the technologies needed will be matured, integrated into a vehicle health management system, and benefits established without requiring extensive changes to the end-user's existing operation and maintenance infrastructure. Issues regarding the end-user customer acceptance of SHM systems are discussed and summarized.

  15. Bibliography for aircraft parameter estimation

    NASA Technical Reports Server (NTRS)

    Iliff, Kenneth W.; Maine, Richard E.

    1986-01-01

    An extensive bibliography in the field of aircraft parameter estimation has been compiled. This list contains definitive works related to most aircraft parameter estimation approaches. Theoretical studies as well as practical applications are included. Many of these publications are pertinent to subjects peripherally related to parameter estimation, such as aircraft maneuver design or instrumentation considerations.

  16. Frequency and impact of summertime stratospheric intrusions over Maryland during DISCOVER-AQ (2011): New evidence from NASA's GEOS-5 simulations

    NASA Astrophysics Data System (ADS)

    Ott, Lesley E.; Duncan, Bryan N.; Thompson, Anne M.; Diskin, Glenn; Fasnacht, Zachary; Langford, Andrew O.; Lin, Meiyun; Molod, Andrea M.; Nielsen, J. Eric; Pusede, Sally E.; Wargan, Krzysztof; Weinheimer, Andrew J.; Yoshida, Yasuko

    2016-04-01

    Aircraft observations and ozonesonde profiles collected on 14 and 27 July 2011, during the Maryland month-long Deriving Information on Surface conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) campaign, indicate the presence of stratospheric air just above the planetary boundary layer (PBL). This raises the question of whether summer stratospheric intrusions (SIs) elevate surface ozone levels and to what degree they influence background ozone levels and contribute to ozone production. We used idealized stratospheric air tracers, along with observations, to determine the frequency and extent of SIs in Maryland during July 2011. On 4 of 14 flight days, SIs were detected in layers that the aircraft encountered above the PBL from the coincidence of enhanced ozone, moderate CO, and low moisture. Satellite observations of lower tropospheric humidity confirmed the occurrence of synoptic-scale influence of SIs as do simulations with the GEOS-5 atmospheric general circulation model. The evolution of GEOS-5 stratospheric air tracers agrees with the timing and location of observed stratospheric influence and indicates that more than 50% of air in SI layers above the PBL had resided in the stratosphere within the previous 14 days. Despite having a strong influence in the lower free troposphere, these events did not significantly affect surface ozone, which remained low on intrusion days. The model indicates similar frequencies of stratospheric influence during all summers from 2009 to 2013. GEOS-5 results suggest that over Maryland, the strong inversion capping the summer PBL limits downward mixing of stratospheric air during much of the day, helping to preserve low surface ozone associated with frontal passages that precede SIs.

  17. Commercial aircraft wake vortices

    NASA Astrophysics Data System (ADS)

    Gerz, Thomas; Holzäpfel, Frank; Darracq, Denis

    2002-04-01

    This paper discusses the problem of wake vortices shed by commercial aircraft. It presents a consolidated European view on the current status of knowledge of the nature and characteristics of aircraft wakes and of technical and operational procedures of minimizing and predicting the vortex strength and avoiding wake encounters. Methodological aspects of data evaluation and interpretation, like the description of wake ages, the characterization of wake vortices, and the proper evaluation of wake data from measurement and simulation, are addressed in the first part. In the second part an inventory of our knowledge is given on vortex characterization and control, prediction and monitoring of vortex decay, vortex detection and warning, vortex encounter models, and wake-vortex safety assessment. Each section is concluded by a list of questions and required actions which may help to guide further research activities. The primary objective of the joint international efforts in wake-vortex research is to avoid potentially hazardous wake encounters for aircraft. Shortened aircraft separations under appropriate meteorological conditions, whilst keeping or even increasing the safety level, is the ultimate goal. Reduced time delays on the tactical side and increased airport capacities on the strategic side will be the benefits of these ambitious ventures for the air transportation industry and services.

  18. Robots for Aircraft Maintenance

    NASA Technical Reports Server (NTRS)

    1993-01-01

    Marshall Space Flight Center charged USBI (now Pratt & Whitney) with the task of developing an advanced stripping system based on hydroblasting to strip paint and thermal protection material from Space Shuttle solid rocket boosters. A robot, mounted on a transportable platform, controls the waterjet angle, water pressure and flow rate. This technology, now known as ARMS, has found commercial applications in the removal of coatings from jet engine components. The system is significantly faster than manual procedures and uses only minimal labor. Because the amount of "substrate" lost is minimal, the life of the component is extended. The need for toxic chemicals is reduced, as is waste disposal and human protection equipment. Users of the ARMS work cell include Delta Air Lines and the Air Force, which later contracted with USBI for development of a Large Aircraft Paint Stripping system (LARPS). LARPS' advantages are similar to ARMS, and it has enormous potential in military and civil aircraft maintenance. The technology may also be adapted to aircraft painting, aircraft inspection techniques and paint stripping of large objects like ships and railcars.

  19. Aircraft to Medicine

    NASA Technical Reports Server (NTRS)

    1991-01-01

    This video discusses how the technology of computer modeling can improve the design and durability of artificial joints for human joint replacement surgery. Also, ultrasound, originally used to detect structural flaws in aircraft, can also be used to quickly assess the severity of a burn patient's injuries, thus aiding the healing process.

  20. Aircraft mission analysis

    NASA Technical Reports Server (NTRS)

    Hauge, D. S.; Rosendaal, H. L.

    1979-01-01

    Aircraft missions, from low to hypersonic speeds, are analyzed rapidly using the FORTRAN IV program NSEG. Program employs approximate equations of motion that vary in form with type of flight segment. Takeoffs, accelerations, climbs, cruises, descents, decelerations, and landings are considered.

  1. Aircraft adaptive learning control

    NASA Technical Reports Server (NTRS)

    Lee, P. S. T.; Vanlandingham, H. F.

    1979-01-01

    The optimal control theory of stochastic linear systems is discussed in terms of the advantages of distributed-control systems, and the control of randomly-sampled systems. An optimal solution to longitudinal control is derived and applied to the F-8 DFBW aircraft. A randomly-sampled linear process model with additive process and noise is developed.

  2. A Critique Analysis of NCLB, Increase Testing, and Past Maryland Mathematics and Science HSA Exams: What Are Maryland Practitioners' Perspectives?

    ERIC Educational Resources Information Center

    Pinder, Patrice Juliet

    2008-01-01

    States are establishing high stakes assessments to serve as a measurement tool of students' academic abilities. This study essentially explored and sought to understand some of Maryland's mathematics and science practitioners' perspectives on increase testing, and the No Child left Behind (NCLB) Act. Basically, the study sought to understand and…

  3. [Opportunities and Obstacles: Implementing Stimulus-Funded School Improvement Grants in Maryland, Michigan, and Idaho. Maryland Case Study

    ERIC Educational Resources Information Center

    McMurrer, Jennifer; McIntosh, Shelby

    2012-01-01

    Two schools in Maryland received ARRA SIG (American Recovery and Reinvestment Act School Improvement Grants) funds to enable them to implement their turnaround efforts. This paper describes the outcomes of these two ARRA SIG recipient schools: (1) G. James Gholson Middle School; and (2) Commodore John Rodgers Elementary School. The experiences of…

  4. Classroom Breakfast Scores High in Maryland: Findings from Year III of the Maryland Meals for Achievement Classroom Breakfast Pilot Program.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore.

    In fall 1998, the Maryland State Department of Education and six schools began a pilot program to evaluate the impact of serving breakfast to students in the classroom as part of the school day. Students in participating schools have an opportunity to eat breakfast in their classroom each day at no charge, regardless of family income. The program,…

  5. Salinity. Grade 5 Science Language Usage. Maryland School Maryland School Performance Assessment Program (MSPAP): Resource Library. Public Release Task.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education. Baltimore. Div. of Planning, Results and Information Management.

    One component of the Maryland School Performance Assessment; Program (MSPAP) is the state's performance-based assessments, criterion-referenced tests that require students to apply what they know and can do to solve problems and display other higher-order thinking skills. This document helps parents, teachers, students, and other citizens…

  6. Mortality among aircraft manufacturing workers

    PubMed Central

    Boice, J. D.; Marano, D. E.; Fryzek, J. P.; Sadler, C. J.; McLaughlin, J. K.

    1999-01-01

    OBJECTIVES: To evaluate the risk of cancer and other diseases among workers engaged in aircraft manufacturing and potentially exposed to compounds containing chromate, trichloroethylene (TCE), perchloroethylene (PCE), and mixed solvents. METHODS: A retrospective cohort mortality study was conducted of workers employed for at least 1 year at a large aircraft manufacturing facility in California on or after 1 January 1960. The mortality experience of these workers was determined by examination of national, state, and company records to the end of 1996. Standardised mortality ratios (SMRs) were evaluated comparing the observed numbers of deaths among workers with those expected in the general population adjusting for age, sex, race, and calendar year. The SMRs for 40 cause of death categories were computed for the total cohort and for subgroups defined by sex, race, position in the factory, work duration, year of first employment, latency, and broad occupational groups. Factory job titles were classified as to likely use of chemicals, and internal Poisson regression analyses were used to compute mortality risk ratios for categories of years of exposure to chromate, TCE, PCE, and mixed solvents, with unexposed factory workers serving as referents. RESULTS: The study cohort comprised 77,965 workers who accrued nearly 1.9 million person-years of follow up (mean 24.2 years). Mortality follow up, estimated as 99% complete, showed that 20,236 workers had died by 31 December 1996, with cause of death obtained for 98%. Workers experienced low overall mortality (all causes of death SMR 0.83) and low cancer mortality (SMR 0.90). No significant increases in risk were found for any of the 40 specific cause of death categories, whereas for several causes the numbers of deaths were significantly below expectation. Analyses by occupational group and specific job titles showed no remarkable mortality patterns. Factory workers estimated to have been routinely exposed to chromate were

  7. Non-linear controls influence functions in an aircraft dynamics simulator

    NASA Technical Reports Server (NTRS)

    Guerreiro, Nelson M.; Hubbard, James E., Jr.; Motter, Mark A.

    2006-01-01

    In the development and testing of novel structural and controls concepts, such as morphing aircraft wings, appropriate models are needed for proper system characterization. In most instances, available system models do not provide the required additional degrees of freedom for morphing structures but may be modified to some extent to achieve a compatible system. The objective of this study is to apply wind tunnel data collected for an Unmanned Air Vehicle (UAV), that implements trailing edge morphing, to create a non-linear dynamics simulator, using well defined rigid body equations of motion, where the aircraft stability derivatives change with control deflection. An analysis of this wind tunnel data, using data extraction algorithms, was performed to determine the reference aerodynamic force and moment coefficients for the aircraft. Further, non-linear influence functions were obtained for each of the aircraft s control surfaces, including the sixteen trailing edge flap segments. These non-linear controls influence functions are applied to the aircraft dynamics to produce deflection-dependent aircraft stability derivatives in a non-linear dynamics simulator. Time domain analysis of the aircraft motion, trajectory, and state histories can be performed using these nonlinear dynamics and may be visualized using a 3-dimensional aircraft model. Linear system models can be extracted to facilitate frequency domain analysis of the system and for control law development. The results of this study are useful in similar projects where trailing edge morphing is employed and will be instrumental in the University of Maryland s continuing study of active wing load control.

  8. Turboprop cargo aircraft systems study

    NASA Technical Reports Server (NTRS)

    Muehlbauer, J. C.; Hewell, J. G., Jr.; Lindenbaum, S. P.; Randall, C. C.; Searle, N.; Stone, R. G., Jr.

    1981-01-01

    The effects of using advanced turboprop propulsion systems to reduce the fuel consumption and direct operating costs of cargo aircraft were studied, and the impact of these systems on aircraft noise and noise prints around a terminal area was determined. Parametric variations of aircraft and propeller characteristics were investigated to determine their effects on noiseprint areas, fuel consumption, and direct operating costs. From these results, three aircraft designs were selected and subjected to design refinements and sensitivity analyses. Three competitive turbofan aircraft were also defined from parametric studies to provide a basis for comparing the two types of propulsion.

  9. Braking performance of aircraft tires

    NASA Astrophysics Data System (ADS)

    Agrawal, Satish K.

    This paper brings under one cover the subject of aircraft braking performance and a variety of related phenomena that lead to aircraft hydroplaning, overruns, and loss of directional control. Complex processes involving tire deformation, tire slipping, and fluid pressures in the tire-runway contact area develop the friction forces for retarding the aircraft; this paper describes the physics of these processes. The paper reviews the past and present research efforts and concludes that the most effective way to combat the hazards associated with aircraft landings and takeoffs on contaminated runways is by measuring and displaying in realtime the braking performance parameters in the aircraft cockpit.

  10. Finite-difference modeling of commercial aircraft using TSAR

    SciTech Connect

    Pennock, S.T.; Poggio, A.J.

    1994-11-15

    Future aircraft may have systems controlled by fiber optic cables, to reduce susceptibility to electromagnetic interference. However, the digital systems associated with the fiber optic network could still experience upset due to powerful radio stations, radars, and other electromagnetic sources, with potentially serious consequences. We are modeling the electromagnetic behavior of commercial transport aircraft in support of the NASA Fly-by-Light/Power-by-Wire program, using the TSAR finite-difference time-domain code initially developed for the military. By comparing results obtained from TSAR with data taken on a Boeing 757 at the Air Force Phillips Lab., we hope to show that FDTD codes can serve as an important tool in the design and certification of U.S. commercial aircraft, helping American companies to produce safe, reliable air transportation.

  11. Air pollution from aircraft

    NASA Technical Reports Server (NTRS)

    Heywood, J. B.; Fay, J. A.; Chigier, N. A.

    1979-01-01

    Forty-one annotated abstracts of reports generated at MIT and the University of Sheffield are presented along with summaries of the technical projects undertaken. Work completed includes: (1) an analysis of the soot formation and oxidation rates in gas turbine combustors, (2) modelling the nitric oxide formation process in gas turbine combustors, (3) a study of the mechanisms causing high carbon monoxide emissions from gas turbines at low power, (4) an analysis of the dispersion of pollutants from aircraft both around large airports and from the wakes of subsonic and supersonic aircraft, (5) a study of the combustion and flow characteristics of the swirl can modular combustor and the development and verification of NO sub x and CO emissions models, (6) an analysis of the influence of fuel atomizer characteristics on the fuel-air mixing process in liquid fuel spray flames, and (7) the development of models which predict the stability limits of fully and partially premixed fuel-air mixtures.

  12. Aircraft turbofan noise

    NASA Technical Reports Server (NTRS)

    Groeneweg, J. F.; Rice, E. J.

    1983-01-01

    Turbofan noise generation and suppression in aircraft engines are reviewed. The chain of physical processes which connect unsteady flow interactions with fan blades to far field noise is addressed. Mechanism identification and description, duct propagation, radiation and acoustic suppression are discussed. The experimental technique of fan inflow static tests are discussed. Rotor blade surface pressure and wake velocity measurements aid in the determination of the types and strengths of the generation mechanisms. Approaches to predicting or measuring acoustic mode content, optimizing treatment impedance to maximize attenuation, translating impedance into porous wall structure and interpreting far field directivity patterns are illustrated by comparisons of analytical and experimental results. The interdependence of source and acoustic treatment design to minimize far field noise is emphasized. Area requiring further research are discussed and the relevance of aircraft turbofan results to quieting other turbomachinery installations is addressed.

  13. Autonomous aircraft initiative study

    NASA Technical Reports Server (NTRS)

    Hewett, Marle D.

    1991-01-01

    The results of a consulting effort to aid NASA Ames-Dryden in defining a new initiative in aircraft automation are described. The initiative described is a multi-year, multi-center technology development and flight demonstration program. The initiative features the further development of technologies in aircraft automation already being pursued at multiple NASA centers and Department of Defense (DoD) research and Development (R and D) facilities. The proposed initiative involves the development of technologies in intelligent systems, guidance, control, software development, airborne computing, navigation, communications, sensors, unmanned vehicles, and air traffic control. It involves the integration and implementation of these technologies to the extent necessary to conduct selected and incremental flight demonstrations.

  14. Aircraft engine pollution reduction.

    NASA Technical Reports Server (NTRS)

    Rudey, R. A.

    1972-01-01

    The effect of engine operation on the types and levels of the major aircraft engine pollutants is described and the major factors governing the formation of these pollutants during the burning of hydrocarbon fuel are discussed. Methods which are being explored to reduce these pollutants are discussed and their application to several experimental research programs are pointed out. Results showing significant reductions in the levels of carbon monoxide, unburned hydrocarbons, and oxides of nitrogen obtained from experimental combustion research programs are presented and discussed to point out potential application to aircraft engines. An experimental program designed to develop and demonstrate these and other advanced, low pollution combustor design methods is described. Results that have been obtained to date indicate considerable promise for reducing advanced engine exhaust pollutants to levels significantly below current engines.

  15. Energy efficient aircraft engines

    NASA Technical Reports Server (NTRS)

    Chamberlin, R.; Miller, B.

    1979-01-01

    The three engine programs that constitute the propulsion portion of NASA's Aircraft Energy Efficiency Program are described, their status indicated, and anticipated improvements in SFC discussed. The three engine programs are (1) Engine Component Improvement--directed at current engines, (2) Energy Efficiency Engine directed at new turbofan engines, and (3) Advanced Turboprops--directed at technology for advanced turboprop--powered aircraft with cruise speeds to Mach 0.8. Unique propulsion system interactive ties to the airframe resulting from engine design features to reduce fuel consumption are discussed. Emphasis is placed on the advanced turboprop since it offers the largest potential fuel savings of the three propulsion programs and also has the strongest interactive ties to the airframe.

  16. Aircraft turbofan noise

    NASA Astrophysics Data System (ADS)

    Groeneweg, J. F.; Rice, E. J.

    1987-01-01

    Turbofan noise generation and suppression in aircraft engines are reviewed. The chain of physical processes which connect unsteady flow interactions with fan blades to far field noise is addressed. Mechanism identification and description, duct propagation, radiation, and acoustic suppression are discussed. The experimental techniques of fan inflow static tests are discussed. Rotor blade surface pressure and wake velocity measurements aid in the determination of the types and strengths of the generation mechanisms. Approaches to predicting or measuring acoustic mode content, optimizing treatment impedance to maximize attenuation, translating impedance into porous wall structure, and interpreting far field directivity patterns are illustrated by comparisons of analytical and experimental results. The interdependence of source and acoustic treatment design to minimize far field noise is emphasized. Areas requiring further research are discussed, and the relevance of aircraft turbofan results to quieting other turbomachinery installation is addressed.

  17. Aircraft turbofan noise

    NASA Astrophysics Data System (ADS)

    Groeneweg, J. F.; Rice, E. J.

    1983-03-01

    Turbofan noise generation and suppression in aircraft engines are reviewed. The chain of physical processes which connect unsteady flow interactions with fan blades to far field noise is addressed. Mechanism identification and description, duct propagation, radiation and acoustic suppression are discussed. The experimental technique of fan inflow static tests are discussed. Rotor blade surface pressure and wake velocity measurements aid in the determination of the types and strengths of the generation mechanisms. Approaches to predicting or measuring acoustic mode content, optimizing treatment impedance to maximize attenuation, translating impedance into porous wall structure and interpreting far field directivity patterns are illustrated by comparisons of analytical and experimental results. The interdependence of source and acoustic treatment design to minimize far field noise is emphasized. Area requiring further research are discussed and the relevance of aircraft turbofan results to quieting other turbomachinery installations is addressed.

  18. Concorde Noise-Induced Building Vibrations, Montgomery County, Maryland

    NASA Technical Reports Server (NTRS)

    Mayes, W. H.; Scholl, H. F.; Stephens, D. G.; Holliday, B. G.; Deloach, R.; Finley, T. D.; Holmes, H. K.; Lewis, R. B.; Lynch, J. W.

    1976-01-01

    A series of studies are reported to assess the noise induced building vibrations associated with Concorde operations. The levels of induced vibration and associated indoor/outdoor noise levels resulting from aircraft and nonaircraft events in selected homes, historic and other buildings near Dulles International Airport were recorded. The building response resulting from aircraft operations was found to be directly proportional to the overall sound pressure level and approximately independent of the aircraft type. The noise levels and, consequently, the response levels were observed to be higher for the Concorde operations than for the CTOL operations. Furthermore, the vibration could be closely reproduced by playing aircraft noise through a loudspeaker system located near the vibration measurement location. Nonaircraft events such as door closing were again observed to result in higher response levels than those induced by aircraft.

  19. Electrical Thermometers for Aircraft

    NASA Technical Reports Server (NTRS)

    Peterson, John B; Womack, S H J

    1937-01-01

    Electrical thermometers commonly used on aircraft are the thermoelectric type for measuring engine-cylinder temperatures, the resistance type for measuring air temperatures, and the superheat meters of thermoelectric and resistance types for use on airships. These instruments are described and their advantages and disadvantages enumerated. Methods of testing these instruments and the performance to be expected from each are discussed. The field testing of engine-cylinder thermometers is treated in detail.

  20. 19 CFR 10.183 - Duty-free entry of civil aircraft, aircraft engines, ground flight simulators, parts, components...

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Duty-free entry of civil aircraft, aircraft engines, ground flight simulators, parts, components, and... aircraft, aircraft engines, and ground flight simulators, including their parts, components, and... United States (HTSUS) by meeting the following requirements: (1) The aircraft, aircraft engines,...

  1. Control of upland bank erosion through tidal marsh construction on restored shores: Application in the maryland portion of Chesapeake Bay

    NASA Astrophysics Data System (ADS)

    Garbisch, Edgar W.; Garbisch, Joanna L.

    1994-09-01

    During the period of 1972 through 1993, Environmental Concern Inc. (EC) and its recent (1989) affiliate Environmental Construction Company (ECC) have completed 216 marsh construction projects to control upland bank erosion in tributaries of the Maryland portion of Chesapeake Bay. Of these projects, 26 have involved marsh construction on unaltered existing shores and 190 have utilized marsh construction on shores that have been restored to former increased elevations through shoreline filling and grading. This paper describes the latter restoration technique. Throughout the 21-year period of applying the technique for long-term upland bank erosion control, refinements to the design standards and criteria for site suitability have been made so as to optimize its successful application. As a result of this experience, a reliable bioengineering restoration technique has evolved to control upland bank erosion. This paper describes the details of this successful technique through a review of: (1) its objectives and benefits, (2) suitability of sites for its application, (3) the design of its shore restoration, (4) its construction, (5) its maintenance, and (6) comparison of its cost with those of structural techniques for bank erosion control. Although the technique has only been applied in the Maryland portions of Chesapeake Bay, its applicability should, with modifications, be broadly applicable to all water bodies.

  2. Some problems of Maryland towns as seen by their mayors

    NASA Technical Reports Server (NTRS)

    Peake, H. J.

    1978-01-01

    Conversations were held with the mayors of six Maryland towns to discuss possible models and needs for technology transfer. An unexpected outcome of the discussions was a considerable insight into local problems as perceived by the mayors. Problems, whether administrative, socio-economic, or technological, are different, from town to town, in degree, not in kind. Recognition of this feature of local priorities is vital to any considerations of external assistance.

  3. Infrared view of Chesapeake Bay showing Virginia, Maryland and Delaware

    NASA Technical Reports Server (NTRS)

    1975-01-01

    An infrared, near view of the Chesapeake Bay area showing portions of Virginia, Maryland and Delaware, as photographed from the Apollo spacecraft in Earth orbit during the joint U.S.-USSR Apollo Soyuz Test Project (ASTP) mission. Richmond and Norfolk can be seen in this picture. Tidewater, Virginia covers much of this view. The photograph was taken at an altitude of 217 kilometers (135 statute miles).

  4. Critical integer quantum Hall topology in the integrable Maryland model

    NASA Astrophysics Data System (ADS)

    Ganeshan, Sriram; Kechedzhi, Kostyantyn

    2014-03-01

    One-dimensional tight binding models such as Aubry-Andre-Harper (AAH) model (with onsite cosine potential) and the integrable Maryland model (with onsite tangent potential) have been the subjects of extensive theoretical research in localization studies. AAH can be directly mapped onto the two-dimensional Hofstadter model that manifests the integer quantum Hall topology on a lattice. However, no such connection has been made for the Maryland model (MM). In this talk, we present a generalized model that contains AAH and MM as the limiting cases with the MM lying precisely at a topological quantum phase transition (TQPT) point. A remarkable feature of this critical point is that the 1D MM retains well-defined energy gaps whereas the equivalent 2D model becomes gapless, signifying the 2D nature of the TQPT. The criticality allows us to associate topological invariants with the Maryland model in a restricted mathematical sense at the special filling factors that are adiabatically connected to the spectral gaps in the 1D Aubry-Andre-Harper model. Our theory presented in this work establishes deep and unexpected mathematical connections between 2D topological models and a family of 1D incommensurate localization models. This work is supported by JQI-NSF-PFC, Microsoft Q and JQI-ARO-MU.

  5. MINOTAUR (Maryland's innovative orbital technologically advanced University rocket)

    NASA Technical Reports Server (NTRS)

    Lewis, Mark J.; Akin, Dave; Lind, Charles; Rice, T. (Editor); Vincent, W. (Editor)

    1992-01-01

    Over the past decade, there has been an increasing interest in designing small commercial launch vehicles. Some of these designs include OSC's Pegasus, and AMROC's Aquila. Even though these vehicles are very different in their overall design characteristics, they all share a common thread of being expensive to design and manufacture. Each of these vehicles has an estimated production and operations cost of over $15000/kg of payload. In response to this high cost factor, the University of Maryland is developing a cost-effective alternative launch vehicle, Maryland's Innovative Orbital Technologically Advanced University Rocket (MINOTAUR). A preliminary cost analysis projects that MINOTAUR will cost under $10000/kg of payload. MINOTAUR will also serve as an enriching project devoted to an entirely student-designed-and-developed launch vehicle. This preliminary design of MINOTAUR was developed entirely by undergraduates in the University of Maryland's Space Vehicle Design class. At the start of the project, certain requirements and priorities were established as a basis from which to begin the design phase: (1) carry a 100 kg payload into a 200 km circular orbit; (2) provide maximum student involvement in the design, manufacturing, and launch phases of the project; and (3) use hybrid propulsion throughout. The following is the list of the project's design priorities (from highest to lowest): (1) safety, (2) cost, (3) minimum development time, (4) maximum use of the off-the-shelf components, (5) performance, and (6) minimum use of pyrotechnics.

  6. Evaluation of Maryland abutment scour equation through selected threshold velocity methods

    USGS Publications Warehouse

    Benedict, S.T.

    2010-01-01

    The U.S. Geological Survey, in cooperation with the Maryland State Highway Administration, used field measurements of scour to evaluate the sensitivity of the Maryland abutment scour equation to the critical (or threshold) velocity variable. Four selected methods for estimating threshold velocity were applied to the Maryland abutment scour equation, and the predicted scour to the field measurements were compared. Results indicated that performance of the Maryland abutment scour equation was sensitive to the threshold velocity with some threshold velocity methods producing better estimates of predicted scour than did others. In addition, results indicated that regional stream characteristics can affect the performance of the Maryland abutment scour equation with moderate-gradient streams performing differently from low-gradient streams. On the basis of the findings of the investigation, guidance for selecting threshold velocity methods for application to the Maryland abutment scour equation are provided, and limitations are noted.

  7. Maryland biological stream survey: Ecological assessment of non-tidal streams sampled in 1996

    SciTech Connect

    Roth, N.E.; Southerland, M.T.; Chaillou, J.C.; Wilson, W.T.; Heimbuch, D.G.

    1998-10-01

    The report summarizes results from the second of three years of sampling for the first round of the statewide Maryland Biological Stream Survey (MBSS or the Survey) and provides an update on the program`s progress in assessing the condition of Maryland`s non-tidal streams. Supported and led by the Maryland Department of Natural Resources (MDNR), the MBSS is a comprehensive program to assess the status of biological resources in Maryland`s non-tidal streams; quantify the extent to which acidic deposition has affected or may be affecting critical biological resources in the state; examine which other water chemistry, physical habitat, and land use factors are important in explaining the current status of biological resources in streams; establish a benchmark for long-term monitoring of trends in these resources; and target future local-scale assessments and mitigation measures needed to restore degraded biological resources.

  8. Highly integrated digital electronic control: Digital flight control, aircraft model identification, and adaptive engine control

    NASA Technical Reports Server (NTRS)

    Baer-Riedhart, Jennifer L.; Landy, Robert J.

    1987-01-01

    The highly integrated digital electronic control (HIDEC) program at NASA Ames Research Center, Dryden Flight Research Facility is a multiphase flight research program to quantify the benefits of promising integrated control systems. McDonnell Aircraft Company is the prime contractor, with United Technologies Pratt and Whitney Aircraft, and Lear Siegler Incorporated as major subcontractors. The NASA F-15A testbed aircraft was modified by the HIDEC program by installing a digital electronic flight control system (DEFCS) and replacing the standard F100 (Arab 3) engines with F100 engine model derivative (EMD) engines equipped with digital electronic engine controls (DEEC), and integrating the DEEC's and DEFCS. The modified aircraft provides the capability for testing many integrated control modes involving the flight controls, engine controls, and inlet controls. This paper focuses on the first two phases of the HIDEC program, which are the digital flight control system/aircraft model identification (DEFCS/AMI) phase and the adaptive engine control system (ADECS) phase.

  9. Flight test of ARINC 741 configuration low gain SATCOM system on Boeing 747-400 aircraft

    NASA Technical Reports Server (NTRS)

    Murphy, Timothy A.; Stapleton, Brian P.

    1990-01-01

    The Boeing company conducted a flight test of a SATCOM system similar to the ARINC 741 configuration on a production model 747-400. A flight plan was specifically designed to test the system over a wide variety of satellite elevations and aircraft attitudes as well as over land and sea. Interface bit errors, signal quality and aircraft position and navigational inputs were all recorded as a function of time. Special aircraft maneuvers were performed to demonstrate the potential for shadowing by aircraft structures. Both a compass rose test and the flight test indicated that shadowing from the tail is insignificant for the 747-400. However, satellite elevation angles below the aircraft horizon during banking maneuvers were shown to have a significant deleterious effect on SATCOM communications.

  10. Mission management aircraft operations manual

    NASA Technical Reports Server (NTRS)

    1992-01-01

    This manual prescribes the NASA mission management aircraft program and provides policies and criteria for the safe and economical operation, maintenance, and inspection of NASA mission management aircraft. The operation of NASA mission management aircraft is based on the concept that safety has the highest priority. Operations involving unwarranted risks will not be tolerated. NASA mission management aircraft will be designated by the Associate Administrator for Management Systems and Facilities. NASA mission management aircraft are public aircraft as defined by the Federal Aviation Act of 1958. Maintenance standards, as a minimum, will meet those required for retention of Federal Aviation Administration (FAA) airworthiness certification. Federal Aviation Regulation Part 91, Subparts A and B, will apply except when requirements of this manual are more restrictive.

  11. A manpower scheduling heuristic for aircraft maintenance application

    NASA Astrophysics Data System (ADS)

    Sze, San-Nah; Sze, Jeeu-Fong; Chiew, Kang-Leng

    2012-09-01

    This research studies a manpower scheduling for aircraft maintenance, focusing on in-flight food loading operation. A group of loading teams with flexible shifts is required to deliver and upload packaged meals from the ground kitchen to aircrafts in multiple trips. All aircrafts must be served within predefined time windows. The scheduling process takes into account of various constraints such as meal break allocation, multi-trip traveling and food exposure time limit. Considering the aircrafts movement and predefined maximum working hours for each loading team, the main objective of this study is to form an efficient roster by assigning a minimum number of loading teams to the aircrafts. We proposed an insertion based heuristic to generate the solutions in a short period of time for large instances. This proposed algorithm is implemented in various stages for constructing trips due to the presence of numerous constraints. The robustness and efficiency of the algorithm is demonstrated in computational results. The results show that the insertion heuristic more efficiently outperforms the company's current practice.

  12. Evaluation of all-electric secondary power for transport aircraft

    NASA Astrophysics Data System (ADS)

    Murray, W. E.; Feiner, L. J.; Flores, R. R.

    1992-01-01

    This report covers a study by Douglas Aircraft Company (DAC) of electrical power systems for advanced transport aircraft based upon an all-electric design concept. The concept would eliminate distributed hydraulic and pneumatic secondary power systems, and feature an expanded secondary electrical power system redesigned to supply power to the loads customarily supplied by hydraulic or pneumatic power. The initial study was based on an advanced 20-kHz electrical power transmission and distribution system, using a system architecture supplied by NASA-Lewis Research Center for twin-engine aircraft with many advanced power conversion concepts. NASA-LeRC later requested DAC to refocus the study on 400-Hz secondary power distribution. Subsequent work was based on a three-engine MD-11 aircraft, selected by DAC as a baseline system design that would provide data for the comparative cost/benefit analysis. The study concluded that the 20-kHz concept produced many expected benefits, and that the all-electric trijet weight savings on hardware redesign would be 2,304 pounds plus a 2.1-percent fuel reduction and resized for a total weight reduction of 11,000 pounds. Cost reductions for a fleet of 800 aircraft in a 15-year production program were estimated at $76.71 million for RDT&E $2.74 million per aircrat for production; $9.84 million for nonrecurring expenses; $120,000 per aircraft for product support; and $300,000 per aircraft per year for operating and maintenance costs, giving a present value of $1.914 billion saved or a future value of $10.496 billion saved.

  13. Evaluation of all-electric secondary power for transport aircraft

    NASA Technical Reports Server (NTRS)

    Murray, W. E.; Feiner, L. J.; Flores, R. R.

    1992-01-01

    This report covers a study by Douglas Aircraft Company (DAC) of electrical power systems for advanced transport aircraft based upon an all-electric design concept. The concept would eliminate distributed hydraulic and pneumatic secondary power systems, and feature an expanded secondary electrical power system redesigned to supply power to the loads customarily supplied by hydraulic or pneumatic power. The initial study was based on an advanced 20-kHz electrical power transmission and distribution system, using a system architecture supplied by NASA-Lewis Research Center for twin-engine aircraft with many advanced power conversion concepts. NASA-LeRC later requested DAC to refocus the study on 400-Hz secondary power distribution. Subsequent work was based on a three-engine MD-11 aircraft, selected by DAC as a baseline system design that would provide data for the comparative cost/benefit analysis. The study concluded that the 20-kHz concept produced many expected benefits, and that the all-electric trijet weight savings on hardware redesign would be 2,304 pounds plus a 2.1-percent fuel reduction and resized for a total weight reduction of 11,000 pounds. Cost reductions for a fleet of 800 aircraft in a 15-year production program were estimated at $76.71 million for RDT&E; $2.74 million per aircrat for production; $9.84 million for nonrecurring expenses; $120,000 per aircraft for product support; and $300,000 per aircraft per year for operating and maintenance costs, giving a present value of $1.914 billion saved or a future value of $10.496 billion saved.

  14. 19 CFR 122.64 - Other aircraft.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 1 2013-04-01 2013-04-01 false Other aircraft. 122.64 Section 122.64 Customs... AIR COMMERCE REGULATIONS Clearance of Aircraft and Permission To Depart § 122.64 Other aircraft. Clearance or permission to depart shall be requested by the aircraft commander or agent for aircraft...

  15. 40 CFR 87.6 - Aircraft safety.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 20 2014-07-01 2013-07-01 true Aircraft safety. 87.6 Section 87.6... POLLUTION FROM AIRCRAFT AND AIRCRAFT ENGINES General Provisions § 87.6 Aircraft safety. The provisions of... be met within the specified time without creating a hazard to aircraft safety....

  16. 19 CFR 122.64 - Other aircraft.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Other aircraft. 122.64 Section 122.64 Customs... AIR COMMERCE REGULATIONS Clearance of Aircraft and Permission To Depart § 122.64 Other aircraft. Clearance or permission to depart shall be requested by the aircraft commander or agent for aircraft...

  17. 19 CFR 122.64 - Other aircraft.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 19 Customs Duties 1 2014-04-01 2014-04-01 false Other aircraft. 122.64 Section 122.64 Customs... AIR COMMERCE REGULATIONS Clearance of Aircraft and Permission To Depart § 122.64 Other aircraft. Clearance or permission to depart shall be requested by the aircraft commander or agent for aircraft...

  18. 40 CFR 87.6 - Aircraft safety.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Aircraft safety. 87.6 Section 87.6... POLLUTION FROM AIRCRAFT AND AIRCRAFT ENGINES General Provisions § 87.6 Aircraft safety. The provisions of... be met within the specified time without creating a hazard to aircraft safety....

  19. 19 CFR 122.64 - Other aircraft.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 1 2012-04-01 2012-04-01 false Other aircraft. 122.64 Section 122.64 Customs... AIR COMMERCE REGULATIONS Clearance of Aircraft and Permission To Depart § 122.64 Other aircraft. Clearance or permission to depart shall be requested by the aircraft commander or agent for aircraft...

  20. 19 CFR 122.64 - Other aircraft.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 1 2011-04-01 2011-04-01 false Other aircraft. 122.64 Section 122.64 Customs... AIR COMMERCE REGULATIONS Clearance of Aircraft and Permission To Depart § 122.64 Other aircraft. Clearance or permission to depart shall be requested by the aircraft commander or agent for aircraft...

  1. Stream salamanders as indicators of stream quality in Maryland, USA

    USGS Publications Warehouse

    Southerland, M.T.; Jung, R.E.; Baxter, D.P.; Chellman, I.C.; Mercurio, G.; Volstad, J.H.

    2004-01-01

    Biological indicators are critical to the protection of small, headwater streams and the ecological values they provide. Maryland and other state monitoring programs have determined that fish indicators are ineffective in small streams, where stream salamanders may replace fish as top predators. Because of their life history, physiology, abundance, and ubiquity, stream salamanders are likely representative of biological integrity in these streams. The goal of this study was to determine whether stream salamanders are effective indicators of ecological conditions across biogeographic regions and gradients of human disturbance. During the summers of 2001 and 2002, we intensively surveyed for stream salamanders at 76 stream sites located west of the Maryland Coastal Plain, sites also monitored by the Maryland Biological Stream Survey (MBSS) and City of Gaithersburg. We found 1,584 stream salamanders, including all eight species known in Maryland, using two 15 ? 2 m transects and two 4 m2 quadrats that spanned both stream bank and channel. We performed removal sampling on transects to estimate salamander species detection probabilities, which ranged from 0.67-0.85. Stepwise regressions identified 15 of 52 non-salamander variables, representing water quality, physical habitat, land use, and biological conditions, which best predicted salamander metrics. Indicator development involved (1) identifying reference (non-degraded) and degraded sites (using percent forest, shading, riparian buffer width, aesthetic rating, and benthic macroinvertebrate and fish indices of biotic integrity); (2) testing 12 candidate salamander metrics (representing species richness and composition, abundance, species tolerance, and reproductive function) for their ability to distinguish reference from degraded sites; and (3) combining metrics into an index that effectively discriminated sites according to known stream conditions. Final indices for Highlands, Piedmont, and Non-Coastal Plain

  2. Aircraft cockpit vision: Math model

    NASA Technical Reports Server (NTRS)

    Bashir, J.; Singh, R. P.

    1975-01-01

    A mathematical model was developed to describe the field of vision of a pilot seated in an aircraft. Given the position and orientation of the aircraft, along with the geometrical configuration of its windows, and the location of an object, the model determines whether the object would be within the pilot's external vision envelope provided by the aircraft's windows. The computer program using this model was implemented and is described.

  3. 30 CFR 920.20 - Approval of Maryland abandoned mine plan.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Center, Third Floor, Suite 3C, Fourth and Market Streets, Harrisburg, Pennsylvania 17101. (b) Maryland Department of Natural Resources, Water Resources Administration, Bureau of Mines, 160 South Water...

  4. Sedimentological indicators of paleoenvironments and siliciclastic stratigraphic sequences in some Miocene deposits of the Calvert Cliffs, southern Maryland

    USGS Publications Warehouse

    Shideler, G.L.

    1994-01-01

    Middle Miocene siliciclastic deposits comprising the Calvert Cliffs section at the Baltimore Gas and Electric Company's (BG&E) nuclear power plant site in southern Maryland were analyzed in terms of lithostratigraphy, sedimentary structures, and granulometric parameters, to interprete paleo-environments within a sequence-stratigraphic framework. In terms of sequence-stratigraphic models, the BG&E section can be interpreted as consisting of two genetic stratigraphic sequences (Galloway model), namely, a shelf sequence and an overlying deltaic sequence. Using the Exxon model, the section consists of two third-order (1-5 m.y. duration) depositional sequences. The stratigraphic sequences of the BG&E section reflect both relatively short-term eustatic transgressive events, as well as a long-term regressive trend with associated local deltation and coastal progradation. The regression probably signified a regional basinward shift of depocenters within the Salisbury embayment during Miocene time. -from Author

  5. Intelligent aircraft/airspace systems

    NASA Technical Reports Server (NTRS)

    Wangermann, John P.

    1995-01-01

    Projections of future air traffic predict at least a doubling of the number of revenue passenger miles flown by the year 2025. To meet this demand, an Intelligent Aircraft/Airspace System (IAAS) has been proposed. The IAAS operates on the basis of principled negotiation between intelligent agents. The aircraft/airspace system today consists of many agents, such as airlines, control facilities, and aircraft. All the agents are becoming increasingly capable as technology develops. These capabilities should be exploited to create an Intelligent Aircraft/Airspace System (IAAS) that would meet the predicted traffic levels of 2005.

  6. NASA research in aircraft propulsion

    NASA Technical Reports Server (NTRS)

    Beheim, M. A.

    1982-01-01

    A broad overview of the scope of research presently being supported by NASA in aircraft propulsion is presented with emphasis on Lewis Research Center activities related to civil air transports, CTOL and V/STOL systems. Aircraft systems work is performed to identify the requirements for the propulsion system that enhance the mission capabilities of the aircraft. This important source of innovation and creativity drives the direction of propulsion research. In a companion effort, component research of a generic nature is performed to provide a better basis for design and provides an evolutionary process for technological growth that increases the capabilities of all types of aircraft. Both are important.

  7. The Typical General Aviation Aircraft

    NASA Technical Reports Server (NTRS)

    Turnbull, Andrew

    1999-01-01

    The reliability of General Aviation aircraft is unknown. In order to "assist the development of future GA reliability and safety requirements", a reliability study needs to be performed. Before any studies on General Aviation aircraft reliability begins, a definition of a typical aircraft that encompasses most of the general aviation characteristics needs to be defined. In this report, not only is the typical general aviation aircraft defined for the purpose of the follow-on reliability study, but it is also separated, or "sifted" into several different categories where individual analysis can be performed on the reasonably independent systems. In this study, the typical General Aviation aircraft is a four-place, single engine piston, all aluminum fixed-wing certified aircraft with a fixed tricycle landing gear and a cable operated flight control system. The system breakdown of a GA aircraft "sifts" the aircraft systems and components into five categories: Powerplant, Airframe, Aircraft Control Systems, Cockpit Instrumentation Systems, and the Electrical Systems. This breakdown was performed along the lines of a failure of the system. Any component that caused a system to fail was considered a part of that system.

  8. Scheduling of an aircraft fleet

    NASA Technical Reports Server (NTRS)

    Paltrinieri, Massimo; Momigliano, Alberto; Torquati, Franco

    1992-01-01

    Scheduling is the task of assigning resources to operations. When the resources are mobile vehicles, they describe routes through the served stations. To emphasize such aspect, this problem is usually referred to as the routing problem. In particular, if vehicles are aircraft and stations are airports, the problem is known as aircraft routing. This paper describes the solution to such a problem developed in OMAR (Operative Management of Aircraft Routing), a system implemented by Bull HN for Alitalia. In our approach, aircraft routing is viewed as a Constraint Satisfaction Problem. The solving strategy combines network consistency and tree search techniques.

  9. 78 FR 47778 - The Boeing Company Boeing Commercial Aircraft (BCA) Auburn, Washington; The Boeing Company Boeing...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-06

    ... in the Federal Register on July 2, 2013 (78 FR 39775). At the request of a union official, the... during the relevant time period at two additional facilities: 10-16 Building 535 Garden Avenue North... Building 535 Garden Avenue North, Renton, Washington and 10-18 Building 635 Park Avenue North,...

  10. Slotted Aircraft Wing

    NASA Technical Reports Server (NTRS)

    Vassberg, John C. (Inventor); Gea, Lie-Mine (Inventor); McLean, James D. (Inventor); Witowski, David P. (Inventor); Krist, Steven E. (Inventor); Campbell, Richard L. (Inventor)

    2006-01-01

    An aircraft wing includes a leading airfoil element and a trailing airfoil element. At least one slot is defined by the wing during at least one transonic condition of the wing. The slot may either extend spanwise along only a portion of the wingspan, or it may extend spanwise along the entire wingspan. In either case, the slot allows a portion of the air flowing along the lower surface of the leading airfoil element to split and flow over the upper surface of the trailing airfoil element so as to achieve a performance improvement in the transonic condition.

  11. Aircraft surface coatings

    NASA Technical Reports Server (NTRS)

    1983-01-01

    A series of studies in which films and liquid spray-on materials were evaluated in the laboratory for transport aircraft external surface coatings are summarized. Elastomeric polyurethanes were found to best meet requirements. Two commercially available products, CAAPCO B-274 and Chemglaze M313, were subjected to further laboratory testing, airline service evaluations, and drag-measurement flight tests. It was found that these coatings were compatible with the severe operating environment of airlines and that coatings reduced airplane drag. An economic analysis indicated significant dollar benefits to airlines from application of the coatings.

  12. Aircraft identification experience

    NASA Technical Reports Server (NTRS)

    Iliff, K. W.

    1979-01-01

    Important aspects of estimating the unknown coefficients of the aircraft equations of motion from dynamic flight data are presented. The primary topic is the application of the maximum likelihood estimation technique. Basic considerations that must be addressed in the estimation of stability and control derivatives from conventional flight maneuvers are discussed. Some complex areas of estimation (such as estimation in the presence of atmospheric turbulence, estimation of acceleration derivatives, and analysis of maneuvers where both kinematic and aerodynamic coupling are present) are also discussed.

  13. Hydrogen aircraft technology

    NASA Technical Reports Server (NTRS)

    Brewer, G. D.

    1991-01-01

    A comprehensive evaluation is conducted of the technology development status, economics, commercial feasibility, and infrastructural requirements of LH2-fueled aircraft, with additional consideration of hydrogen production, liquefaction, and cryostorage methods. Attention is given to the effects of LH2 fuel cryotank accommodation on the configurations of prospective commercial transports and military airlifters, SSTs, and HSTs, as well as to the use of the plentiful heatsink capacity of LH2 for innovative propulsion cycles' performance maximization. State-of-the-art materials and structural design principles for integral cryotank implementation are noted, as are airport requirements and safety and environmental considerations.

  14. Aircraft Speed Instruments

    NASA Technical Reports Server (NTRS)

    Beij, K Hilding

    1933-01-01

    This report presents a concise survey of the measurement of air speed and ground speed on board aircraft. Special attention is paid to the pitot-static air-speed meter which is the standard in the United States for airplanes. Air-speed meters of the rotating vane type are also discussed in considerable detail on account of their value as flight test instruments and as service instruments for airships. Methods of ground-speed measurement are treated briefly, with reference to the more important instruments. A bibliography on air-speed measurement concludes the report.

  15. Aircraft Inspection for the General Aviation Aircraft Owner.

    ERIC Educational Resources Information Center

    Federal Aviation Administration (DOT), Washington, DC. Flight Standards Service.

    Presented is useful information for owners, pilots, student mechanics, and others with aviation interests. Part I of this booklet outlines aircraft inspection requirements, owner responsibilities, inspection time intervals, and sources of basic information. Part II is concerned with the general techniques used to inspect an aircraft. (Author/JN)

  16. New Whole-House Solutions Case Study: Nexus EnergyHomes, Frederick, Maryland

    SciTech Connect

    2014-02-01

    With this new home—which achieved the highest rating possible under the National Green Building Standard—Nexus EnergyHomes demonstrated that green and affordable can go hand in hand. The mixed-humid climate builder, along with the U.S. Department of Energy Building America team Partnership for Home Innovation, embraced the challenge to create a new duplex home in downtown Frederick, Maryland, that successfully combines affordability with state-of-the-art efficiency and indoor environmental quality. To limit costs, the builder designed a simple rectangular shape and kept interesting architectural features such as porches outside the building’s structure. This strategy avoided the common pitfall of creating potential air leakage where architectural features are connected to the structure before the building is sealed against air infiltration. To speed construction and limit costs, the company chose factory-assembled components such as structural insulated panel walls and floor and roof trusses. Factory-built elements were key in achieving continuous insulation around the entire structure. Open-cell spray foam at the rim joist and attic roofline completed the insulation package, and kept the heating, ventilating, and air-conditioning system in conditioned space.

  17. Turning the Aircraft Carrier.

    ERIC Educational Resources Information Center

    Kraack, Thomas

    2003-01-01

    Describes how one company developed an organizational structure and system of governance to ensure that strategy and work force enablement are locked in. Discusses the following principles for trainers: understanding the business, directing the effects learning has on business results, and managing relationships with key decision makers. (JOW)

  18. Multidisciplinary Design and Analysis for Commercial Aircraft

    NASA Technical Reports Server (NTRS)

    Cummings, Russell M.; Freeman, H. JoAnne

    1999-01-01

    Multidisciplinary design and analysis (MDA) has become the normal mode of operation within most aerospace companies, but the impact of these changes have largely not been reflected at many universities. On an effort to determine if the emergence of multidisciplinary design concepts should influence engineering curricula, NASA has asked several universities (Virginia Tech, Georgia Tech, Clemson, BYU, and Cal Poly) to investigate the practicality of introducing MDA concepts within their undergraduate curricula. A multidisciplinary team of faculty, students, and industry partners evaluated the aeronautical engineering curriculum at Cal Poly. A variety of ways were found to introduce MDA themes into the curriculum without adding courses or units to the existing program. Both analytic and educational tools for multidisciplinary design of aircraft have been developed and implemented.

  19. Dryden B-52 Launch Aircraft in Flight over Dryden

    NASA Technical Reports Server (NTRS)

    1996-01-01

    parachute recovery systems used to recover the space shuttle solid rocket booster casings. It also supported eight orbiter (space shuttle) drag chute tests in 1990. In addition, the B-52 served as the air launch platform for the first six Pegasus space boosters. During its many years of service, the B-52 has undergone several modifications. The first major modification was made by North American Aviation (now part of Boeing) in support of the X-15 program. This involved creating a launch-panel-operator station for monitoring the status of the test vehicle being carried, cutting a large notch in the right inboard wing flap to accommodate the vertical tail of the X-15 aircraft, and installing a wing pylon that enables the B-52 to carry research vehicles and test articles to be air-launched/dropped. Located on the right wing, between the inboard engine pylon and the fuselage, this wing pylon was subjected to extensive testing prior to its use. For each test vehicle the B-52 carried, minor changes were made to the launch-panel operator's station. Built originally by the Boeing Company, the NASA B-52 is powered by eight Pratt & Whitney J57-19 turbojet engines, each of which produce 12,000 pounds of thrust. The aircraft's normal launch speed has been Mach 0.8 (about 530 miles per hour) and its normal drop altitude has been 40,000 to 45,000 feet. It is 156 feet long and has a wing span of 185 feet. The heaviest load it has carried was the No. 2 X-15 aircraft at 53,100 pounds. Project manager for the aircraft is Roy Bryant.

  20. Critical joints in large composite aircraft structure

    NASA Technical Reports Server (NTRS)

    Nelson, W. D.; Bunin, B. L.; Hart-Smith, L. J.

    1983-01-01

    A program was conducted at Douglas Aircraft Company to develop the technology for critical structural joints of composite wing structure that meets design requirements for a 1990 commercial transport aircraft. The prime objective of the program was to demonstrate the ability to reliably predict the strength of large bolted composite joints. Ancillary testing of 180 specimens generated data on strength and load-deflection characteristics which provided input to the joint analysis. Load-sharing between fasteners in multirow bolted joints was computed by the nonlinear analysis program A4EJ. This program was used to predict strengths of 20 additional large subcomponents representing strips from a wing root chordwise splice. In most cases, the predictions were accurate to within a few percent of the test results. In some cases, the observed mode of failure was different than anticipated. The highlight of the subcomponent testing was the consistent ability to achieve gross-section failure strains close to 0.005. That represents a considerable improvement over the state of the art.

  1. Altus aircraft on runway

    NASA Technical Reports Server (NTRS)

    1996-01-01

    The remotely piloted Altus aircraft flew several developmental test flights from Rogers Dry Lake adjacent to NASA's Dryden Flight Research Center, Edwards, Calif., in 1996. The Altus--the word is Latin for 'high'--is a variant of the Predator surveillance drone built by General Atomics/Aeronautical Systems, Inc. It is designed for high-altitude, long-duration scientific sampling missions, and is powered by a turbocharged four-cylinder piston engine. The first Altus was developed under NASA's Environmental Research Aircraft and Sensor Technology program, while a second Altus was built for a Naval Postgraduate School/Department of Energy program. A pilot in a control station on the ground flew the craft by radio signals, using visual cues from a video camera in the nose of the Altus and information from the craft's air data system. Equipped with a single-stage turbocharger during the 1996 test flights, the first Altus reached altitudes in the 37,000-foot range, while the similarly-equipped second Altus reached 43,500 feet during developmental flights at Dryden in the summer of 1997. The NASA Altus also set an endurance record of more than 26 hours while flying a science mission in late 1996 and still had an estimated 10 hours of fuel remaining when it landed. Now equipped with a two-stage turbocharger, the NASA Altus maintained an altitude of 55,000 feet for four hours during flight tests in 1999.

  2. Hypersonic transport aircraft

    NASA Technical Reports Server (NTRS)

    1987-01-01

    A hypersonic transport aircraft design project was selected as a result of interactions with NASA Lewis Research Center personnel and fits the Presidential concept of the Orient Express. The Graduate Teaching Assistant (GTA) and an undergraduate student worked at the NASA Lewis Research Center during the 1986 summer conducting a literature survey, and relevant literature and useful software were collected. The computer software was implemented in the Computer Aided Design Laboratory of the Mechanical and Aerospace Engineering Department. In addition to the lectures by the three instructors, a series of guest lectures was conducted. The first of these lectures 'Anywhere in the World in Two Hours' was delivered by R. Luidens of NASA Lewis Center. In addition, videotaped copies of relevant seminars obtained from NASA Lewis were also featured. The first assignment was to individually research and develop the mission requirements and to discuss the findings with the class. The class in consultation with the instructors then developed a set of unified mission requirements. Then the class was divided into three design groups (1) Aerodynamics Group, (2) Propulsion Group, and (3) Structures and Thermal Analyses Group. The groups worked on their respective design areas and interacted with each other to finally come up with an integrated conceptual design. The three faculty members and the GTA acted as the resource persons for the three groups and aided in the integration of the individual group designs into the final design of a hypersonic aircraft.

  3. Dumbo heavy lifter aircraft

    NASA Technical Reports Server (NTRS)

    Riester, Peter; Ellis, Colleen; Wagner, Michael; Orren, Scott; Smith, Byron; Skelly, Michael; Zgraggen, Craig; Webber, Matt

    1992-01-01

    The world is rapidly changing from one with two military superpowers, with which most countries were aligned, to one with many smaller military powers. In this environment, the United States cannot depend on the availability of operating bases from which to respond to crises requiring military intervention. Several studies (e.g. the SAB Global Reach, Global Power Study) have indicated an increased need to be able to rapidly transport large numbers of troops and equipment from the continental United States to potential trouble spots throughout the world. To this end, a request for proposals (RFP) for the concept design of a large aircraft capable of 'projecting' a significant military force without reliance on surface transportation was developed. These design requirements are: minimum payload of 400,000 pounds at 2.5 g maneuver load factor; minimum unfueled range of 6,000 nautical miles; and aircraft must operate from existing domestic air bases and use existing airbases or sites of opportunity at the destination.

  4. Aircraft landing using GPS

    NASA Astrophysics Data System (ADS)

    Lawrence, David Gary

    The advent of the Global Positioning System (GPS) is revolutionizing the field of navigation. Commercial aviation has been particularly influenced by this worldwide navigation system. From ground vehicle guidance to aircraft landing applications, GPS has the potential to impact many areas of aviation. GPS is already being used for non-precision approach guidance; current research focuses on its application to more critical regimes of flight. To this end, the following contributions were made: (1) Development of algorithms and a flexible software architecture capable of providing real-time position solutions accurate to the centimeter level with high integrity. This architecture was used to demonstrate 110 automatic landings of a Boeing 737. (2) Assessment of the navigation performance provided by two GPS-based landing systems developed at Stanford, the Integrity Beacon Landing System, and the Wide Area Augmentation System. (3) Preliminary evaluation of proposed enhancements to traditional techniques for GPS positioning, specifically, dual antenna positioning and pseudolite augmentation. (4) Introduction of a new concept for positioning using airport pseudolites. The results of this research are promising, showing that GPS-based systems can potentially meet even the stringent requirements of a Category III (zero visibility) landing system. Although technical and logistical hurdles still exist, it is likely that GPS will soon provide aircraft guidance in all phases of flight, including automatic landing, roll-out, and taxi.

  5. Aircraft Conceptual Design Using Vehicle Sketch Pad

    NASA Technical Reports Server (NTRS)

    Fredericks, William J.; Antcliff, Kevin R.; Costa, Guillermo; Deshpande, Nachiket; Moore, Mark D.; Miguel, Edric A. San; Snyder, Alison N.

    2010-01-01

    Vehicle Sketch Pad (VSP) is a parametric geometry modeling tool that is intended for use in the conceptual design of aircraft. The intent of this software is to rapidly model aircraft configurations without expending the expertise and time that is typically required for modeling with traditional Computer Aided Design (CAD) packages. VSP accomplishes this by using parametrically defined components, such as a wing that is defined by span, area, sweep, taper ratio, thickness to cord, and so on. During this phase of frequent design builds, changes to the model can be rapidly visualized along with the internal volumetric layout. Using this geometry-based approach, parameters such as wetted areas and cord lengths can be easily extracted for rapid external performance analyses, such as a parasite drag buildup. At the completion of the conceptual design phase, VSP can export its geometry to higher fidelity tools. This geometry tool was developed by NASA and is freely available to U.S. companies and universities. It has become integral to conceptual design in the Aeronautics Systems Analysis Branch (ASAB) here at NASA Langley Research Center and is currently being used at over 100 universities, aerospace companies, and other government agencies. This paper focuses on the use of VSP in recent NASA conceptual design studies to facilitate geometry-centered design methodology. Such a process is shown to promote greater levels of creativity, more rapid assessment of critical design issues, and improved ability to quickly interact with higher order analyses. A number of VSP vehicle model examples are compared to CAD-based conceptual design, from a designer perspective; comparisons are also made of the time and expertise required to build the geometry representations as well.

  6. The Ultra Light Aircraft Testing

    NASA Technical Reports Server (NTRS)

    Smith, Howard W.

    1993-01-01

    The final report for grant NAG1-345 is presented. Recently, the bulk of the work that the grant has supported has been in the areas of ride quality and the structural analysis and testing of ultralight aircraft. The ride quality work ended in May 1989. Hence, the papers presented in this final report are concerned with ultralight aircraft.

  7. Aircraft wiring program status report

    NASA Technical Reports Server (NTRS)

    Beach, Rex

    1995-01-01

    In this Naval Air Warfare Center (NAWC) Aircraft Division status report, the general and wire and cable component activities, the systems engineering activities, the aircraft wiring lead maintenance activities, the NAVAIR/NASA interface activities, and the Base Realignment and Closure (BRAC) Commission recommendations are presented.

  8. Steam Power Plants in Aircraft

    NASA Technical Reports Server (NTRS)

    Wilson, E E

    1926-01-01

    The employment of steam power plants in aircraft has been frequently proposed. Arguments pro and con have appeared in many journals. It is the purpose of this paper to make a brief analysis of the proposal from the broad general viewpoint of aircraft power plants. Any such analysis may be general or detailed.

  9. Fuel conservative aircraft engine technology

    NASA Technical Reports Server (NTRS)

    Nored, D. L.

    1978-01-01

    Technology developments for more fuel-efficiency subsonic transport aircraft are reported. Three major propulsion projects were considered: (1) engine component improvement - directed at current engines; (2) energy efficient engine - directed at new turbofan engines; and (3) advanced turboprops - directed at technology for advanced turboprop-powered aircraft. Each project is reviewed and some of the technologies and recent accomplishments are described.

  10. Section 1: Company directory

    SciTech Connect

    Not Available

    1991-12-01

    This is a 1992 directory of those companies doing business in all areas of the independent power producers industry. The listing includes the company name, address, telephone and FAX numbers, and the name of a company contact. The listing is international in scope.

  11. Structural modeling of aircraft tires

    NASA Technical Reports Server (NTRS)

    Clark, S. K.; Dodge, R. N.; Lackey, J. I.; Nybakken, G. H.

    1973-01-01

    A theoretical and experimental investigation of the feasibility of determining the mechanical properties of aircraft tires from small-scale model tires was accomplished. The theoretical results indicate that the macroscopic static and dynamic mechanical properties of aircraft tires can be accurately determined from the scale model tires although the microscopic and thermal properties of aircraft tires can not. The experimental investigation was conducted on a scale model of a 40 x 12, 14 ply rated, type 7 aircraft tire with a scaling factor of 8.65. The experimental results indicate that the scale model tire exhibited the same static mechanical properties as the prototype tire when compared on a dimensionless basis. The structural modeling concept discussed in this report is believed to be exact for mechanical properties of aircraft tires under static, rolling, and transient conditions.

  12. Bird community response to filter strips in Maryland

    USGS Publications Warehouse

    Blank, P.J.; Dively, G.P.; Gill, D.E.; Rewa, C.A.

    2011-01-01

    Filter strips are strips of herbaceous vegetation planted along agricultural field margins adjacent to streams or wetlands and are designed to intercept sediment, nutrients, and agrichemicals. Roughly 16,000 ha of filter strips have been established in Maryland through the United States Department of Agriculture's Conservation Reserve Enhancement Program. Filter strips often represent the only uncultivated herbaceous areas on farmland in Maryland and therefore may be important habitat for early-successional bird species. Most filter strips in Maryland are planted to either native warm-season grasses or cool-season grasses and range in width from 10.7 m to 91.4 m. From 2004 to 2007 we studied the breeding and wintering bird communities in filter strips adjacent to wooded edges and non-buffered field edges and the effect that grass type and width of filter strips had on bird community composition. We used 5 bird community metrics (total bird density, species richness, scrub-shrub bird density, grassland bird density, and total avian conservation value), species-specific densities, nest densities, and nest survival estimates to assess the habitat value of filter strips for birds. Breeding and wintering bird community metrics were greater in filter strips than in non-buffered field edges but did not differ between cool-season and warm-season grass filter strips. Most breeding bird community metrics were negatively related to the percent cover of orchardgrass (Dactylis glomerata) in ???1 yr. Breeding bird density was greater in narrow (60 m) filter strips. Our results suggest that narrow filter strips adjacent to wooded edges can provide habitat for many bird species but that wide filter strips provide better habitat for grassland birds, particularly obligate grassland species. If bird conservation is an objective, avoid planting orchardgrass in filter strips and reduce or eliminate orchardgrass from filter strips through management practices. Copyright ?? 2011 The

  13. Sea birds wintering off Maryland shores, 1972-73

    USGS Publications Warehouse

    Rowlett, R.A.

    1973-01-01

    During the winter of 1972-73, studies were conducted to determine the status and distribution of pelagic species of birds occurring at sea as far as 38 miles east of Ocean City, Md. The wintering off-shore avifauna was found to be impressively rich in variety of species and numbers of individuals. Sightings included Fulmar and Skua, both first sight records for Maryland. Large alcids, especially Razorbills, were observed in unprecedented numbers and on five of the seven trips undertaken. Thick-billed Murre was sighted once and Dovekie, once. A Pomarine Jaeger was a mid-winter first for Maryland. Black-legged Kittiwakes were sighted on all seven trips, with age ratios consistently averaging about three adults to one immature. Likewise, Gannets were observed on all seven trips, 7.5 adults to one immature. Iceland Gulls were seen twice and Black-headed Gulls on three trips. Evidence of a definite migration was noted on Nov. 19, as Gannets were observed flying south in a narrow band, four miles wide, five to nine miles east of Ocean City, and Black-legged Kittiwakes, likewise, were heading south in a steady stream no closer than 14 miles east of Ocean City. Data accumulated from December through March suggest most pelagics occurring in Maryland waters during this period were truly wintering and not transients. This report is concerned primarily with the true pelagics normally found well away from the sight of land and does not dwell on those 'sea birds' commonly seen in immediate coastal waters.

  14. Small area variations in health care delivery in Maryland.

    PubMed Central

    Gittelsohn, A; Powe, N R

    1995-01-01

    OBJECTIVE: Our purpose is a descriptive analysis of variations in hospital use among small areas of Maryland. DATA SOURCE: The data are Maryland patient discharge records from acute care hospitals for 1985-1987 and small area population estimates by age, gender, race, and income. FINDINGS: The common finding was excess geographic variability among Maryland's 115 areas. The hypothesis of uniform rates was rejected for most DRGs, including low-variation mastectomy and hernia repair. Clustering of high-use rates occurred in neighboring areas for orthopedic, vascular, and elective procedures. Admission rates for most nondiscretionary procedures and medical DRGs were reduced in affluent areas while discretionary surgery increased with income level. Elective procedures had extreme variation and were related to income. Coronary artery disease rates declined with income while coronary artery procedure rates increased, indicating that access and patient selection were factors in the use of coronary bypass and angioplasty. CONCLUSIONS: The issue is not the ubiquitous variation among small areas but its extent and identification of geographic patterns. Hospital use is related to demography, morbidity, medical resources, access, selection for care, and physician practice patterns. Heterogeneity of these factors ensures that uniform delivery of health care rarely holds. There is little evidence that incidence of surgical disease is the main source of variation in use of discretionary surgery. Rather, variations reflect differing medical opinion on appropriate use. Without evaluation, excessive use cannot be distinguished from underservice. Morbidity explains the variability of nondiscretionary surgery and conditions related to lifestyle. Access plays an important role for discretionary surgery. Geographic analysis can identify variation and relate incidence to socioeconomic and specific local effects. Hospital data do not permit direct assessment of appropriate care

  15. Electric restructuring and the environment: Issue identification for Maryland

    SciTech Connect

    Brown, D.H.; Kahal, M.I.

    1998-07-01

    The State of Maryland is presently investigating the competitive restructuring of its electric utility industry. This raises a number of complex issues including the potential impact on the environment. To assist that investigation, the Power Plant Research Program (PPRP) has been conducting a comprehensive technical and policy review of the potential environmental impacts. The key analytic issues identified and considered include the following: Wholesale and retail open access could increase NO{sub x} emissions from Midwest coal-fired generation. If this occurs, it would impair air quality in Maryland and increase nitrate deposition in the Chesapeake Bay. This requires an assessment of the projected amount of ``excess'' coal generation in the Midwest available for export over the next ten years. This was evaluated using the latest NERC projections. Emissions in the Mid-Atlantic region will depend upon how and whether market forces accelerate plant retirements, including retirements of economically marginal nuclear capacity. While the quantitative impacts are uncertain, restructuring is likely to have demand side effects, changing time patterns and the overall level of power demands. This may have important implications for increased emissions. While these analytic issues warrant careful study, PPRP's review concludes that certain institutional changes, which may accompany restructuring potentially, are of even greater importance. In particular, the traditional ``cost plus'' form of monopoly regulation has fostered a high degree of cooperation between state environmental authorities and utilities, making it possible for utilities to voluntarily exceed the minimum regulatory or statutory standards. Restructuring also raises troubling questions concerning the feasibility of the coordinated environmental review for power projects conducted pursuant to Maryland's certification regulations.

  16. The Maryland PERG: Two decades of learning how students learn

    NASA Astrophysics Data System (ADS)

    Redish, Edward

    2015-03-01

    Over the past twenty years, the University of Maryland's Physics Education Research Group (UMd-PERG) has carried out educational research and development using a variety of NSF funding opportunities, building from basic research in cognitive modeling, to instructional materials development, to basic research on professional development. The group has drawn on opportunities in teacher training, K-12 teaching and learning, and university level research and development. In this talk I will recap some of the key lessons we have learned and how it all fits together. This work has been supported by many grants from the NSF over a 20 year period.

  17. The VA Maryland Health Care System's telemental health program.

    PubMed

    Koch, Edward F

    2012-05-01

    The VA Maryland Health Care System introduced videoconferencing technology to provide psychiatry, evidenced-based psychotherapy, case management, and patient education at rural clinics where it was difficult to recruit providers. Telemental health services enable rural clinics to offer additional services, such as case management and patient education. Services have been expanded to urban outpatient clinics where a limited number of mental health clinic hours are available. This technology expands the availability of mental health providers and services, allowing patients to receive services from providers located at distant medical centers.

  18. The campus at the University of Maryland at Baltimore.

    PubMed

    Rowan, R M

    1994-09-01

    The University of Maryland at Baltimore (UMAB) is an urban professional school campus. Its 36 acres include 39 buildings, both historic and new. The campus fabric is marked by diversity. The new facilities master plan was developed to reflect the strategic planning process for the campus. Design guidelines are intended to create a common theme while still encouraging each building to have a unique identity. The new Health Sciences Library/Information Services building will sit diagonally from Davidge Hall, built in 1812 and the symbolic center of the campus.

  19. Maryland Bridge: An Interim Prosthesis for Tooth Replacement in Adolescents

    PubMed Central

    Jyoti, Sapna; Kaul, Rupali Borkar; Sethi, Ntasha

    2011-01-01

    A space in the anterior region of the dental arch of a youngster, either due to trauma or a congenitally missing tooth, can not only lead to psychological trauma but also create a functional dilemma for the dentist, as the usual treatment options of implant, removable partial denture and fixed partial denture available for adults, are often inapplicable or inconvenient for an adolescent. In such a situation, a resin-bonded fixed partial denture (RBFPD), such as Maryland Bridge fulfills all the requirements of an ideal interim solution till growth completion is achieved and a more permanent tooth replacement option can be explored.

  20. The campus at the University of Maryland at Baltimore.

    PubMed

    Rowan, R M

    1994-09-01

    The University of Maryland at Baltimore (UMAB) is an urban professional school campus. Its 36 acres include 39 buildings, both historic and new. The campus fabric is marked by diversity. The new facilities master plan was developed to reflect the strategic planning process for the campus. Design guidelines are intended to create a common theme while still encouraging each building to have a unique identity. The new Health Sciences Library/Information Services building will sit diagonally from Davidge Hall, built in 1812 and the symbolic center of the campus. PMID:7842669

  1. Development of UMARC (University of Maryland Advanced Rotorcraft Code)

    NASA Technical Reports Server (NTRS)

    Bir, Gunjit; Chopra, Inderjit; Nguyen, Khanh

    1990-01-01

    The University of Maryland Advanced Rotorcraft Code (UMARC) is a user-friendly, FEM-based comprehensive helicopter rotor simulation code of high numerical robustness and computational efficiency. UMARC formulates the rotor-fuselage equations using Hamilton's principle, and are discretized using finite elements in space and time. The FEM formulation allows the code to analyze a wide variety of rotor designs. Dynamic inflow modeling is used for unsteady wake inflow computations. Predicted stability, response, and blade-load data are validated with experimental data for several configurations, including representative articulated, hingeless, and bearingless rotors.

  2. Lead poisoning in a sample of Maryland mourning doves

    USGS Publications Warehouse

    Locke, L.N.; Bagley, G.E.

    1967-01-01

    A sick mourning dove (Zenuidura macroura) collected in Maryland with 2 lead shot in the gizzard showed acid-fast intranuclear inclusion bodies in the kidney tubular cells. The liver and the tibia contained 72 ppm and 187 ppm lead (wet weight) respectively. Four gizzards from 62 doves killed by hunters contained lead shot. The lead content of 43 dove livers ranged from 0.4-14.0 ppm (wet weight); 40 of these doves were collected by hunters, and the other 3 were dying of trichomoniasis.

  3. PROGRESS IN MEETING PROBLEMS OF MIGRATORY LABOR IN MARYLAND, FOURTH ANNUAL REPORT.

    ERIC Educational Resources Information Center

    NYSTROM, PAUL E.; AND OTHERS

    THE VEGETABLE AND FRUIT INDUSTRIES OF MARYLAND HAVE LONG BEEN DEPENDENT UPON MIGRATORY LABOR FOR THE SEASONAL LABOR REQUIRED IN HARVESTING AND PROCESSING OPERATIONS. THIS LABOR FORCE COMES TO THE STATE IN THE SPRING OR SUMMER, IS EMPLOYED IN VARIOUS CAMPS IN MARYLAND AND STATES IN THE NORTH, AND MIGRATES SOUTH FOLLOWING THE HARVEST OF LATE…

  4. 76 FR 27622 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Adoption of Control...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-12

    ...) revision submitted by the State of Maryland. This SIP revision includes amendments to Maryland's regulation for Volatile Organic Compounds from Specific Processes and meets the requirement to adopt Reasonably...) standards for large appliance coatings. These amendments will reduce emissions of volatile organic...

  5. 75 FR 59179 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Adoption of Control...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-27

    ...) revision submitted by the State of Maryland. This SIP revision includes amendments to Maryland's regulation for Volatile Organic Compounds from Specific Processes, and meets the requirement to adopt Reasonably... flexible packaging printing. These amendments will reduce emissions of volatile organic compound...

  6. 78 FR 68834 - Maryland Solar, LLC; Notice of Petition for Limited Waiver

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-15

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission Maryland Solar, LLC; Notice of Petition for Limited Waiver Take notice that... (Commission) Rules of Practice and Procedure, 18 CFR 292.207, Maryland Solar, LLC filed a petition for...

  7. Taking the "Next Great Step" for Maryland Public Schools: State of Education Report, 2010

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2010

    2010-01-01

    Maryland public schools continue to pick up honors and receive recognition for the work going on in their classrooms. For the second straight year, Maryland's education system has been ranked as number one in the nation by "Education Week", the nation's leading education publication. The "College Board" followed that up by ranking the State first…

  8. PGCC Transfers to Maryland Public Four-Year Colleges. Research Brief RB93-15.

    ERIC Educational Resources Information Center

    Clagett, Craig A.

    Using statewide fall enrollment reporting systems, the Maryland Higher Education Commission (MHEC) generates a report each year showing fall-to-fall enrollment patterns of students among Maryland public colleges and universities, resulting in a "transfer matrix" that provides an indicator of transfer volume and destinations. At Prince George's…

  9. The Improvement of Occupational Education in Maryland: A Progress Report, Fiscal Year 1989.

    ERIC Educational Resources Information Center

    Hunter, Jean E.

    An assessment is provided of the progress of Maryland's Joint Coordinating Committee for Occupational Education Programs in developing a systematic procedure for the evaluation of the quality of occupational programs in Maryland. After presenting the 1976 resolution which established the joint committee, a project summary for fiscal year 1989 is…

  10. The Improvement of Occupational Education in Maryland: A Progress Report, Fiscal Year 1987.

    ERIC Educational Resources Information Center

    Nespoli, Lawrence A.

    An examination is presented of the progress of Maryland's Joint Coordinating Committee for Occupational Education Programs in developing a systematic procedure for the evaluation of the quality of occupational programs in Maryland's community colleges. After presenting the 1976 resolution which established the joint committee, the fiscal year 1987…

  11. 77 FR 26474 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Approval of 2011 Consent...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-04

    ...; Maryland; Approval of 2011 Consent Decree to Control Emissions From the GenOn Chalk Point Generating... oxides (NO X ) from the GenOn Chalk Point generating station (Chalk Point). These revisions also remove the 1978 and 1979 Consent Orders for the Chalk Point generating station from the Maryland SIP as...

  12. Records Retention and Disposition. A Reference Manual for Maryland Public School Systems.

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore.

    This report presents standardized records management procedures. Its purpose is to provide Maryland State public school systems guidelines and standards for the establishment of effective records retention and disposition programs. These guidelines are consistent with legal requirements imposed by Maryland law. The report contains approved records…

  13. A Parent's Guide: Maryland's Plan for PreK-12 Education, 2010-2011 School Year

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2010

    2010-01-01

    Maryland's 24 school systems have made great strides in improving public education from pre-kindergarten through high school to ensure children are getting a high-quality education. This guide provides information and online links, including: (1) Maryland's state testing and reporting processes; (2) Programs available to support student…

  14. Report of a Legislative Internship Program of the Women's Caucus of the Maryland Legislature.

    ERIC Educational Resources Information Center

    Alexander, Marianne

    This report describes a pilot project of college student internships for the Women's Caucus of the Maryland Legislature. The idea for the project was developed by Maryland's 21 women state legislators and was implemented during their 1977 legislative session. Sponsored by the Center for the American Woman and Politics under a grant from the Ms.…

  15. In the Public Interest: Law, Government, and Media. Maryland Women's History Resource Packet--1986.

    ERIC Educational Resources Information Center

    Maryland State Commission for Women, Baltimore.

    Designed to be used for National Women's History Week (March 2-8), this 1986 Maryland women's history resource packet centers around Maryland women who have made significant volunteer and career contributions in the areas of government, law, and the public interest media. The packet begins with suggested student activity lists and activity sheets…

  16. Changing Lives: The Baltimore City Community College Life Sciences Partnership with the University of Maryland, Baltimore

    ERIC Educational Resources Information Center

    Carroll, Vanessa G.; Harris-Bondima, Michelle; Norris, Kathleen Kennedy; Williams, Carolane

    2010-01-01

    Baltimore City Community College (BCCC) leveraged heightened student interest and enrollment in the sciences and allied health with Maryland's world-leading biotechnology industry to build a community college life sciences learning and research center right on the University of Maryland, Baltimore's downtown BioPark campus. The BCCC Life Sciences…

  17. 75 FR 48860 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Transportation...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-12

    ... approval did not include Maryland's regulation regarding conflict resolution associated with conformity... revisions until and unless it also approves Maryland's regulation regarding conflict resolution associated... (EPA). ACTION: Withdrawal of direct final rule. SUMMARY: On June 18, 2010 (75 FR 34644), EPA...

  18. Maryland: Mountains to the Sea. A Gallery Class, Grades 4-6.

    ERIC Educational Resources Information Center

    National Aquarium in Baltimore, MD. Dept. of Education.

    The "Maryland: Mountains to the Sea" exhibit (National Aquarium in Baltimore) consists of four exhibits and eight graphics panels. The exhibits are an Allegheny pond and a salt marsh which are both partially open, Assateague beach which includes birds, and the continental shelf. A variety of Maryland pond and ocean fish, crabs, and water birds are…

  19. The National Higher Education and Workforce Initiative: Strategy in Action: Building the Cybersecurity Workforce in Maryland

    ERIC Educational Resources Information Center

    Business-Higher Education Forum, 2014

    2014-01-01

    The Business-Higher Education Forum (BHEF) has achieved particular success in operationalizing the National Higher Education and Workforce Initiative (HEWI) in Maryland around cybersecurity. Leveraging its membership of corporate CEOs, university presidents, and government agency leaders, BHEF partnered with the University System of Maryland to…

  20. Maryland's Special Populations Network. A model for cancer disparities research, education, and training.

    PubMed

    Baquet, Claudia R; Mack, Kelly M; Mishra, Shiraz I; Bramble, Joy; Deshields, Mary; Datcher, Delores; Savoy, Mervin; Brooks, Sandra E; Boykin-Brown, Stephanie; Hummel, Kery

    2006-10-15

    The unequal burden of cancer in minority and underserved communities nationally and in Maryland is a compelling crisis. The Maryland Special Populations Cancer Research Network (MSPN) developed an infrastructure covering Maryland's 23 jurisdictions and Baltimore City through formal partnerships between the University of Maryland School of Medicine, University of Maryland Statewide Health Network, University of Maryland Eastern Shore, and community partners in Baltimore City, rural Eastern Shore, rural Western Maryland, rural Southern Maryland, and Piscataway Conoy Tribe and statewide American Indians. Guided by the community-based participatory framework, the MSPN undertook a comprehensive assessment (of needs, strengths, and resources available) that laid the foundation for programmatic efforts in community-initiated cancer awareness and education, research, and training. The MSPN infrastructure was used to implement successful and innovative community-based cancer education interventions and technological solutions; conduct education and promotion of clinical trials, cancer health disparities research, and minority faculty cancer research career development; and leverage additional resources for sustainability. MSPN engaged in informed advocacy among decision- and policymakers at state and national levels, and its community-based clinical trials program was recognized by the U.S. Department of Health and Human Services as a Best Practice Award. The solutions to reduce and eliminate cancer health disparities are complex and require comprehensive and focused multidisciplinary cancer health disparities research, training, and education strategies implemented through robust community-academic partnerships. Cancer 2006. (c) American Cancer Society. PMID:16944470

  1. Trends in Degrees Awarded at Maryland Higher Education Institutions: 1987 to 1997.

    ERIC Educational Resources Information Center

    Maryland State Higher Education Commission, Annapolis.

    This report presents 27 graphs and tables detailing trends in degrees awarded at Maryland institutions of higher education from 1987 to 1997. Highlights of trend data for degrees awarded by level note that during 1996-97, Maryland institutions awarded over 42,000 certificates and degrees at all levels, nearly one-third more than 10 years earlier;…

  2. A Resource Guide for the Maryland Plan's Group Project and Line Production.

    ERIC Educational Resources Information Center

    Day, Gerald F.

    This guide was developed for teachers who are using the Maryland Plan's group processes--the group project and line production methods. The guide is divided into four sections. The first section is an overview of the entire Maryland Plan. It describes the program which provides high school industrial arts students, from seventh grade through ninth…

  3. The Maryland Commission on Environmental Justice and Sustainable Communities: a review.

    PubMed

    Rehr, Rebecca; Wilson, Sacoby

    2013-02-01

    This paper evaluates the Maryland Commission on Environmental Justice and Sustainable Communities through stakeholder interviews and review of written reports. The Commission is empowered by diverse perspectives, but can feel limited by its charge. Commissioners have worked towards achieving EJ in Maryland, but have yet to fulfill a sustained vision.

  4. Report of the Task Force on the Education of Maryland's African-American Males

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2007

    2007-01-01

    In 1993, the Governor's Commission on Black Males, chaired by then Delegate Elijah E. Cummings, issued a report that studied the conditions of African-American males in Maryland as they related to employment, health conditions, criminal justice, and education. The Commission provided a "snapshot of the plight of the black males in Maryland." In…

  5. Task Force Report on Social Studies Education in Maryland: The Challenge and the Imperative

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2010

    2010-01-01

    In November 2004, State Superintendent of Schools Nancy S. Grasmick convened the Maryland Social Studies Task Force. The Task Force was charged with examining issues related to social studies education and recommending ways to improve social studies instruction in Maryland's public schools. The Task Force formed four Subcommittees, each examining…

  6. Maryland Advisory Council on Vocational-Technical Education Third Annual Evaluation Report, 1972.

    ERIC Educational Resources Information Center

    Maryland State Advisory Council on Vocational-Technical Education, Baltimore.

    In its annual evaluation of the vocational and technical education program of Maryland, the Maryland Advisory Council on Vocational-Technical Education reviewed the State Plan and statistical record of the Division of Vocational Technical Education (DVE) for fiscal year 1972, and conducted interviews with representatives of DVE. Included in this…

  7. Undergraduate Transfers: Maryland Public Institutions of Higher Education, 2002-2003

    ERIC Educational Resources Information Center

    Maryland Higher Education Commission, 2004

    2004-01-01

    This report is composed of a set of tables showing, by campus, the undergraduate students who were enrolled in Maryland public colleges in 2002 and the Maryland public college to which they transferred in 2003. This analysis is possible because the Commission collects enrollment data on all students using an encrypted social security number as a…

  8. 76 FR 27610 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Adoption of Control...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-12

    ... Implementation Plan (SIP) revision submitted by the Maryland Department of the Environment (MDE). This SIP... Processes and meets the requirement to adopt Reasonably Available Control Technology (RACT) for sources... facilities. Therefore, this revision will help Maryland attain and maintain the national ambient air...

  9. 76 FR 60077 - Maryland; Amendment No. 3 to Notice of an Emergency Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-28

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF HOMELAND SECURITY Federal Emergency Management Agency Maryland; Amendment No. 3 to Notice of an Emergency... notice of an emergency declaration for State of Maryland (FEMA-3335-EM), dated August 27, 2011,...

  10. 76 FR 56462 - Maryland; Amendment No. 2 to Notice of an Emergency Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-13

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF HOMELAND SECURITY Federal Emergency Management Agency Maryland; Amendment No. 2 to Notice of an Emergency... notice of an emergency declaration for the State of Maryland (FEMA-3335-EM), dated August 27, 2011,...

  11. 77 FR 52135 - Hamilton Bank, Baltimore, Maryland; Approval of Conversion Application

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-28

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF THE TREASURY Office of the Comptroller of the Currency Hamilton Bank, Baltimore, Maryland; Approval of Conversion...) approved the application of Hamilton Bank, Baltimore, Maryland to convert to the stock form of...

  12. 77 FR 71811 - Maryland; Amendment No. 1 to Notice of an Emergency Declaration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-04

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF HOMELAND SECURITY Federal Emergency Management Agency Maryland; Amendment No. 1 to Notice of an Emergency... notice of an emergency declaration for the State of Maryland (FEMA-3349-EM), dated October 28, 2012,...

  13. 75 FR 41927 - Ideal Federal Savings Bank, Baltimore, Maryland; Notice of Appointment of Receiver

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-19

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF THE TREASURY Office of Thrift Supervision Ideal Federal Savings Bank, Baltimore, Maryland; Notice of Appointment of... Corporation as sole Receiver for Ideal Federal Savings Bank, Baltimore, Maryland, (OTS No. 08283), on July...

  14. A Parent's Guide: Maryland's Plan for PreK-12 Education, 2009-2010

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2010

    2010-01-01

    To raise the achievement of every student, Maryland designed "Achievement Matters Most," a plan for public schools that sets goals in the areas of achievement, teaching, testing, safety, and family involvement in schools. Achievement Matters Most supports Maryland schools' efforts to meet the goals of the federal No Child Left Behind (NCLB) Act.…

  15. Getting Ready: The 2010-2011 Maryland School Readiness Report. Children Entering School Ready to Learn

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2011

    2011-01-01

    This report was developed in partnership with Ready At Five. It lays out the critical importance of children starting school fully prepared to succeed in kindergarten. Most importantly, the report shares what everyone has learned from the 2010-2011 Maryland Model for School Readiness (MMSR) data about the school readiness of Maryland's children:…

  16. A Parent's Guide: Maryland's Plan for PreK-12 Education, 2008

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2008

    2008-01-01

    To raise the achievement of every student, Maryland designed "Achievement Matters Most," a plan for public schools that sets goals in the areas of achievement, teaching, testing, safety, and family involvement in schools. Achievement Matters Most supports Maryland schools' efforts to meet the goals of the federal No Child Left Behind (NCLB) Act.…

  17. Maryland Ranks #1 in the Nation on Advanced Placement Exams for Participation and Performance

    ERIC Educational Resources Information Center

    Maryland State Department of Education, 2009

    2009-01-01

    Maryland public high school students outperformed all others in the nation on the rigorous Advanced Placement (AP) exams, according to the College Board's fifth annual analysis of the AP program. Maryland ranked first nationwide in the percentage of public school students scoring 3 or higher on at least one AP exam. A score of 3 or higher on the…

  18. 76 FR 9705 - Approval and Promulgation of Air Quality Implementation Plans; Maryland; Amendment to the...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-22

    ... to the Definition of Fuel-Burning Equipment AGENCY: Environmental Protection Agency (EPA). ACTION... the State of Maryland amending the definition of ``fuel-burning equipment.'' The revision removes the word ``furnace'' from the definition of ``fuel-burning equipment'' in one of Maryland's regulations...

  19. 75 FR 74712 - Planet Energy (Maryland) Corp.; Supplemental Notice That Initial Market-Based Rate Filing...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-01

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission Planet Energy (Maryland) Corp.; Supplemental Notice That Initial Market... supplemental notice in the above-referenced proceeding, of Planet Energy (Maryland) Corp.'s application...

  20. Dryden B-52 Launch Aircraft on Edwards AFB Runway

    NASA Technical Reports Server (NTRS)

    1996-01-01

    booster casings. It also supported eight orbiter (space shuttle) drag chute tests in 1990. In addition, the B-52 served as the air launch platform for the first six Pegasus space boosters. During its many years of service, the B-52 has undergone several modifications. The first major modification was made by North American Aviation (now part of Boeing) in support of the X-15 program. This involved creating a launch-panel-operator station for monitoring the status of the test vehicle being carried, cutting a large notch in the right inboard wing flap to accommodate the vertical tail of the X-15 aircraft, and installing a wing pylon that enables the B-52 to carry research vehicles and test articles to be air-launched/dropped. Located on the right wing, between the inboard engine pylon and the fuselage, this wing pylon was subjected to extensive testing prior to its use. For each test vehicle the B-52 carried, minor changes were made to the launch-panel operator's station. Built originally by the Boeing Company, the NASA B-52 is powered by eight Pratt & Whitney J57-19 turbojet engines, each of which produce 12,000 pounds of thrust. The aircraft's normal launch speed has been Mach 0.8 (about 530 miles per hour) and its normal drop altitude has been 40,000 to 45,000 feet. It is 156 feet long and has a wing span of 185 feet. The heaviest load it has carried was the No. 2 X-15 aircraft at 53,100 pounds. Project manager for the aircraft is Roy Bryant.