22 results on '"Joe Russo"'
Search Results
2. Fostering Innovation Across the U.S. Criminal Justice System: Identifying Opportunities to Improve Effectiveness, Efficiency, and Fairness
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Michael J. D. Vermeer, Shoshana R. Shelton, Kristin J. Leuschner, Joe Russo, Sean E. Goodison, Duren Banks, John S. Hollywood, Brian A. Jackson, and Dulani Woods
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Focus (computing) ,Political science ,Law enforcement ,Justice (ethics) ,Public administration ,Criminal justice - Abstract
In this report, the authors focus on common needs that apply to all three sections of the justice system: law enforcement, the courts, and corrections agencies. Starting with the deep pool of feedback and input collected from the practitioner community across the five-year Priority Criminal Justice Needs Initiative project, the authors abstracted insights about innovation needs for the justice system as a whole.
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- 2020
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3. Data-Informed Jails: Challenges and Opportunities
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Joe Russo, Dulani Woods, Brian A. Jackson, and Michael J. D. Vermeer
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Scope (project management) ,business.industry ,Business ,Public relations ,Criminal justice - Abstract
Jails produce vast amounts of data because of the expanding scope of services they are expected to provide. However, most jails are not using these data to improve operations or outcomes. An expert panel of administrators, researchers, and representatives from national organizations discussed the challenges related to using data in jails and identified ways to overcome these obstacles.
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- 2020
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4. Risk and Needs Assessments in Prisons: Identifying High-Priority Needs for Using Evidence-Based Practices
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Brian A. Jackson, Dulani Woods, Michael J. D. Vermeer, and Joe Russo
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Evidence-based practice ,Recidivism ,business.industry ,media_common.quotation_subject ,Needs assessment ,Organizational culture ,Prison ,Public relations ,business ,media_common ,Criminal justice - Abstract
Prison systems are highly complex, are often underresourced, and might lack the internal capacity to effectively implement evidence-based risk and needs assessments (RNAs) in their operations. Furthermore, it can be difficult to change institutional culture to accept an evidence-based approach in an environment in which custody objectives are paramount. A panel of experts identified ways to address and improve the use of RNA tools in prisons.
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- 2020
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5. Ethoxylated Amine Friction Modifiers and ZDDP
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Hugh Spikes, Joe Russo, Joanna Dawczyk, and Shell Research Limited
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Materials science ,Mechanical Engineering ,Friction modifier ,02 engineering and technology ,Surfaces and Interfaces ,021001 nanoscience & nanotechnology ,XANES ,Nanocrystalline material ,Boundary friction ,Surfaces, Coatings and Films ,020303 mechanical engineering & transports ,0203 mechanical engineering ,Chemical engineering ,Mechanics of Materials ,Monolayer ,Alkoxy group ,Mechanical Engineering & Transports ,Amine gas treating ,0912 Materials Engineering ,0210 nano-technology ,0913 Mechanical Engineering - Abstract
The influence of a series of Ethomeens (ethoxylated alkylamine organic friction modifiers) on the durability and friction of tribofilms formed by a commercial blend of primary and secondary ZDDP in sliding/rolling contact has been studied. When pre-formed ZDDP tribofilms are rubbed in Ethomeen solution, boundary friction is reduced and some of the ZDDP film is removed. Ethomeens having just two ethoxy groups give lower boundary friction on ZDDP than those with 15 ethoxy groups, but result in much greater removal of the tribofilm itself. Based on XANES analysis, the film removed by both types of Ethomeen consists primarily of nanocrystalline orthophosphate. The level of boundary friction and its dependence on sliding speed, coupled with the dimensions of the molecules, suggests that the Ethomeens with two ethoxy groups may form quite closely packed vertical monolayers on ZDDP tribofilm surfaces, but that those with fifteen ethoxy groups cannot be close packed; yet they still reduce boundary friction significantly. The study shows that selection of an appropriate aminic friction modifier for use with ZDDP is a balance between its ability to reduce friction and its potentially harmful effect on a ZDDP tribofilm.
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- 2019
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6. Film thickness and friction of ZDDP tribofilms
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Hugh Spikes, Joe Russo, Neal Morgan, Joanna Dawczyk, Shell Research Limited, and Engineering & Physical Science Research Council (EPSRC)
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Technology ,Engineering, Chemical ,Morphology (linguistics) ,Materials science ,Friction ,ZDDP ,THERMAL-DEGRADATION ,02 engineering and technology ,Surface finish ,engineering.material ,MECHANISMS ,Tribofilm ,chemistry.chemical_compound ,Engineering ,0203 mechanical engineering ,Coating ,ENHANCING PROPERTIES ,Mechanical Engineering & Transports ,Thin film ,Composite material ,Zinc dialkyldithiophosphate ,0912 Materials Engineering ,PART II ,Alkyl ,chemistry.chemical_classification ,Science & Technology ,REMOVAL PROCESSES ,Mechanical Engineering ,IN-SITU ,Film thickness ,Surfaces and Interfaces ,ZINC DITHIOPHOSPHATE ,PERFORMANCE ,021001 nanoscience & nanotechnology ,Roughness ,ANTIWEAR ,Surfaces, Coatings and Films ,Rubbing ,Engineering, Mechanical ,020303 mechanical engineering & transports ,chemistry ,Mechanics of Materials ,Zinc dithiophosphate ,BOUNDARY LUBRICATION ,engineering ,0210 nano-technology ,Layer (electronics) ,0913 Mechanical Engineering - Abstract
Tribofilm formation by several zinc dialkyl- and diaryldithiophosphate (ZDDP) solutions in thin film rolling-sliding conditions has been investigated. A primary, a secondary alkyl and a mixed alkyl ZDDP show similar rates of film formation and generate films typically 150 nm thick. Another secondary ZDDP forms a tribofilm much faster and the film is partially lost after extended rubbing. An aryl ZDDP forms a tribofilm much more slowly. The films all have a pad-like structure, characterised by flat pad regions separated by deep valleys. Three different techniques have been used to analyse the thickness and morphology of the tribofilms: spacer layer imaging (SLIM), scanning white light interferometry (SWLI) of the gold-coated film and contact mode atomic force microscopy (AFM). The SLIM method measures considerably thicker films than the other two techniques, probably because of lack of full conformity of a glass disc loaded against the rough tribofilm. No evidence of a highly viscous layer on top of the solid tribofilm is seen. SWLI and contact mode AFM measure similar film thicknesses. The importance of coating the tribofilm with a reflective layer prior to using SWLI is confirmed. As noted in previous work, the formation of a ZDDP tribofilm is accompanied by a marked shift in the Stribeck friction curve towards higher entrainment speed. For a given ZDDP this shift is found to correlate with the measured tribofilm roughness, proving that it results from the influence of this roughness on fluid entrainment in the inlet.
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- 2019
7. Countering Threats to Correctional Institution Security: Identifying Innovation Needs to Address Current and Emerging Concerns
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Brian A. Jackson, Dulani Woods, Joe Russo, and John S. Shaffer
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business.industry ,Political science ,Correctional institution ,Public relations ,business - Abstract
This report presents challenges and needs associated with threats to correctional institution safety and security, including violence, contraband, and compromised staff members. In light of the ongoing challenges the corrections sector faces in countering these threats, RAND researchers convened an expert workshop to better understand the challenges and identify the high-priority needs associated with threats to institutional security.
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- 2019
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8. Leveraging Technology to Enhance Community Supervision: Identifying Needs to Address Current and Emerging Concerns
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Dulani Woods, George B. Drake, Joe Russo, and Brian A. Jackson
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Officer ,Knowledge management ,business.industry ,Emerging technologies ,Best practice ,Delphi method ,Law enforcement ,Key (cryptography) ,Business ,Operational effectiveness - Abstract
An expert workshop of correctional administrators and researchers explored how technology can be used to address key challenges faced by community corrections agencies. Participants recommended developing best practices for leveraging technology to improve officer safety, improve officer competencies, facilitate positive offender behaviors, hold offenders accountable, and improve agencies' operational effectiveness.
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- 2019
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9. Managing the Seriously Mentally Ill in Corrections
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Brian A. Jackson, John S. Shaffer, Joe Russo, and Dulani Woods
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medicine.medical_specialty ,Recidivism ,Mentally ill ,medicine ,Law enforcement ,Mental illness ,medicine.disease ,Psychiatry ,Psychology ,Mental health treatment ,Criminal justice - Abstract
Some jurisdictions are making great strides with respect to how the criminal justice system deals with individuals with serious mental illness (SMI), but significant challenges and opportunities remain. This report presents the results of an expert workshop convened to identify the needs associated with how individuals with SMI become justice-involved and how to achieve better outcomes before and after they come under correctional control.
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- 2019
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10. Use of FIB to study ZDDP tribofilms
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Joe Russo, Joanna Dawczyk, Mahmoud Ardakani, Hugh Spikes, Ecaterina Ware, and Engineering & Physical Science Research Council (EPSRC)
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Technology ,Engineering, Chemical ,FIB surface damage ,ADDITIVES ,Materials science ,Ion beam ,ZDDP ,chemistry.chemical_element ,02 engineering and technology ,Focused ion beam ,Gold coating ,Engineering ,FIB ,0203 mechanical engineering ,Mechanical Engineering & Transports ,Gallium ,Lubricant ,FOCUSED ION-BEAM ,0912 Materials Engineering ,Crystallinity ,Deposition (law) ,Science & Technology ,TRANSMISSION ELECTRON-MICROSCOPY ,Mechanical Engineering ,FILM FORMATION ,Metallurgy ,Surfaces and Interfaces ,Tribology ,021001 nanoscience & nanotechnology ,OIL ,Surfaces, Coatings and Films ,Engineering, Mechanical ,020303 mechanical engineering & transports ,chemistry ,INDUCED DAMAGE ,Mechanics of Materials ,Transmission electron microscopy ,TEM ,Crystallite ,0210 nano-technology ,LUBRICANT ,0913 Mechanical Engineering - Abstract
Focussed ion beam milling (FIB) followed by TEM has been used to study ZDDP tribofilms on rubbed steel surfaces. It has been found that the impact of high energy platinum and gallium ions during FIB causes significant morphological and structural changes to the uppermost 30–50 nm of a ZDDP tribofilm. This can be prevented by the low energy deposition of a quite thick gold layer prior to installation of the sample in the FIB facility. This problem, and its solution, have been quite widely reported in the non-tribology literature but have not previously been highlighted in the application of FIB to study tribological surfaces. It has also been found, using this gold pre-deposition method, that the bulk of the ZDDP tribofilm studied has a polycrystalline structure.
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- 2018
11. Building a High-Quality Correctional Workforce: Identifying Challenges and Needs
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Brian A. Jackson, George B. Drake, Joe Russo, and Dulani Woods
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business.industry ,Process (engineering) ,media_common.quotation_subject ,Workforce ,ComputingMilieux_LEGALASPECTSOFCOMPUTING ,Quality (business) ,Workforce management ,Public relations ,business ,Panel discussion ,media_common - Abstract
Correctional staff must protect the public from those convicted of crimes and prepare convicted people for successful, law-abiding lives in the community through the reentry process. It is thus critically important for the corrections sector to develop a high-quality workforce. This report presents the results of an expert panel discussion focused on identifying and prioritizing ways to address workforce concerns in the corrections sector.
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- 2018
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12. Caring for Those in Custody: Identifying High-Priority Needs to Reduce Mortality in Correctional Facilities
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Dulani Woods, John S. Shaffer, Brian A. Jackson, and Joe Russo
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Substance abuse ,Nursing ,Mortality rate ,medicine ,Business ,Obligation ,medicine.disease ,Mental health treatment ,Occupational safety and health - Abstract
Correctional facilities have a constitutional obligation to provide for the health and well-being of those under their charge, but maintaining inmate health and safety is a significant challenge. This report presents the results of an expert panel convened to consider these challenges and identify a series of needs that, if addressed, could significantly reduce inmate mortality rates.
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- 2017
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13. Fostering Innovation in Community and Institutional Corrections : Identifying High-Priority Technology and Other Needs for the U.S. Corrections Sector
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Brian A. Jackson, Joe Russo, John S. Hollywood, Dulani Woods, Richard Silberglitt, George B. Drake, John S. Shaffer, Mikhail Zaydman, Brian G. Chow, Brian A. Jackson, Joe Russo, John S. Hollywood, Dulani Woods, Richard Silberglitt, George B. Drake, John S. Shaffer, Mikhail Zaydman, and Brian G. Chow
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- Corrections--United States
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Given the challenges posed to the U.S. corrections sector, such as tightened budgets and increasingly complex populations under its charge, it is valuable to identify opportunities where changes in tools, practices, or approaches could improve performance. In this report, RAND researchers, with the help of a practitioner Corrections Advisory Panel, seek to map out an innovation agenda for the sector.
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- 2015
14. Predicting Risk of European Corn Borer Infestation in Sweet Corn Based on Harvest Date
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Steve M. Spangler, Jay Schlegel, Dennis D. Calvin, and Joe Russo
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Integrated pest management ,European corn borer ,integumentary system ,biology ,Ecotype ,fungi ,Voltinism ,food and beverages ,Sowing ,Horticulture ,biology.organism_classification ,medicine.disease_cause ,Ostrinia ,Agronomy ,parasitic diseases ,Infestation ,medicine ,Hybrid - Abstract
ADDITIONAL INDEX WORDS. Ostrinia nubilalis, Zea mays, prediction maps, spatial mapping, integrated pest management SUMMARY. Infestation of sweet corn (Zea mays) at harvest by european corn borer (Ostrinia nubilalis) was examined in 16 hybrid/harvest date combinations from 1994 through 1996 in central Pennsylvania. Two general periods of sweet corn ear infestation levels were observed. Infestations, expressed as proportion of ears infested, were 0.11 (11%) or lower in 10 of 11 plots harvested from 21 July to 23 Aug., whereas they were noticeably higher (30%–88%) in September and early October. Infestations expressed as larvae per ear showed the same temporal pattern. A nonlinear (sigmoidal) relationship was found between degree-days from 1 Jan. and proportion of ears infested. The higher infestations were caused by the secondgeneration larvae of the bivoltine ecotype. Based on these relationships, a riskprediction system is proposed that anticipates, at planting, harvest infestation by using predicted harvest dates of sweet corn, european corn borer life stages, and infestation levels. Examples are presented for multiple plantings and hybrids for a specific site and a landscape (Pennsylvania). The risk prediction system we propose will allow growers to anticipate the risk of ear infestations at planting time, thus providing predictions that would help with management decisions.
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- 2009
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15. Perspectives of agribusiness intelligence
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Joe Russo
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Engineering management ,Business ,Agribusiness - Published
- 2016
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16. Effects ofN- andC-terminal addition of oligolysines or native loop residues on the biophysical properties of transmembrane domain peptides from a G-protein coupled receptor
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V. V. Sureshbabu, Patricia Cano-Sanchez, Boris Arshava, Tatsuya Inui, Beatrice Severino, Joe Russo, Fred Naider, Jeff Becker, Fa-Xiang Ding, P., CANO SANCHEZ, Severino, Beatrice, V. V., Sureshbabu, J., Russo, T., Inui, F. X., Ding, B., Arshava, J., Becker, and F., Naider
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transmembrane peptide ,Circular dichroism ,Receptors, Peptide ,Stereochemistry ,Molecular Sequence Data ,Lysine ,Peptide ,Saccharomyces cerevisiae ,Biochemistry ,Micelle ,oligolysines ,Receptors, G-Protein-Coupled ,chemistry.chemical_compound ,Structural Biology ,Spectroscopy, Fourier Transform Infrared ,Drug Discovery ,Polylysine ,Amino Acid Sequence ,Sodium dodecyl sulfate ,Molecular Biology ,Chromatography, High Pressure Liquid ,Micelles ,G protein-coupled receptor ,Pharmacology ,chemistry.chemical_classification ,Vesicle ,Organic Chemistry ,General Medicine ,Peptide Fragments ,circular dichroism ,Crystallography ,Transmembrane domain ,chemistry ,Solvents ,Molecular Medicine ,Dimyristoylphosphatidylcholine - Abstract
Transmembrane domains (TMDs) of G-protein coupled receptors (GPCRs) have very low water solubility and often aggregate during purification and biophysical investigations. To circumvent this problem many laboratories add oligolysines to the N -a ndC-termini of peptides that correspond to a TMD. To systematically evaluate the effect of the oligolysines on the biophysical properties of a TMD we synthesized 21 peptides corresponding to either the second (TPIFIINQVSLFLIILHSALYFKY) or sixth (SFHILLIMSSQSLLVPSIIFILAYSLK) TMD of Ste2p, a GPCR from Saccharomyces cerevisiae. Added to the termini of these peptides were either Lysn (n = 1,2,3) or the corresponding native loop residues. The biophysical properties of the peptides were investigated by circular dichroism (CD) spectroscopy in trifluoroethanol-water mixtures, sodium dodecyl sulfate (SDS) micelles and dimyristoylphosphocholine (DMPC)-dimyristoylphosphoglycerol (DMPG) vesicles, and by attenuated total reflection Fourier transform infrared (ATR-FTIR) in DMPC/DMPG multilayers. The results show that the conformation assumed depends on the number of lysine residues and the sequence of the TMD. Identical peptides with native or an equal number of lysine residues exhibited different biophysical properties and structural tendencies. Copyright 2006 European Peptide Society and John Wiley &S ons, Ltd.
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- 2006
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17. Detection and Localization of Occult Lesions Using Breast Magnetic Resonance Imaging
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Ron Sharo, Linda M. Sanders, Paul D. Friedman, Joe Russo, Robert Smith, and Srirama V. Swaminathan
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medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Lobular carcinoma ,Cancer ,Breast magnetic resonance imaging ,Ductal carcinoma ,medicine.disease ,Occult ,Community hospital ,Biopsy ,Medicine ,Breast MRI ,Radiology, Nuclear Medicine and imaging ,Radiology ,business - Abstract
Rationale and Objectives To evaluate the outcome of diagnostic breast MR imaging followed by MR guided needle localization for mammographically and sonographically occult breast lesions in a community-based hospital. Materials and Methods Records of the initial 50 consecutive patients who underwent MR guided needle localizations at our institution from November 2001 to January 2003 were reviewed. Sixty-two lesions were localized by MR and were mammographically and sonographically occult. Pathology following excision was reviewed and correlated with the MR findings. Results Cancer was present in 15 % (9/62) of lesions or 18 % (9/50) of the women localized. Five of the lesions (56%) were invasive carcinoma and four (44%) were ductal carcinoma in situ (DCIS). High-risk lesions, including atypical ductal hyperplasia (ADH) and atypical lobular hyperplasia (ALH), were found in 6.5 % (4/62) of the lesions, while 3 % (2/62) of the lesions contained lobular carcinoma in situ (LCIS). Cancer plus high risk lesions were found in 15/62 (24%) lesions or 14/50 (28%) of women who underwent biopsy. Conclusion The data in this study supports findings from other studies conducted by large research institutions. In this regard, it is important that community-based hospitals, such as the one operating this breast MR program, can achieve the same positive predictive values as those found in data emanating from academic institutions.
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- 2005
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18. Functional expression of the Candida albicans α-factor receptor in Saccharomyces cerevisiae
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Hasmik Sargsyan, Agnieszka M. Janiak, Joe Russo, Jeffrey M. Becker, Fred Naider, and Melinda Hauser
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Mating type ,Receptors, Peptide ,Saccharomyces cerevisiae ,Mating Factor ,Microbiology ,Fungal Proteins ,Gene Expression Regulation, Fungal ,Candida albicans ,Genetics ,Amino Acid Sequence ,Gene ,Fungal protein ,biology ,biology.organism_classification ,Corpus albicans ,Culture Media ,Cell biology ,Receptors, Mating Factor ,Signal transduction ,Peptides ,Signal Transduction ,Transcription Factors - Abstract
Candida albicans genes involved in mating have been identified previously by homology to Saccharomyces cerevisiae mating pathway components. The C. albicans genome encodes CaSte2p, a homolog of the S. cerevisiae alpha-mating pheromone receptor Ste2p, and two potential pheromones, alpha-F13 (GFRLTNFGYFEPG) and alpha-F14 (GFRLTNFGYFEPGK). The response of several C. albicans strains to the synthesized peptides was determined. The alpha-F13 was degraded by a C. albicans MTLa strain but not by S. cerevisiae MATa cells. The CaSTE2 gene was cloned and expressed in a ste2-deleted strain of S. cerevisiae. Growth arrest and beta-galactosidase activity induced from a FUS1-lacZ reporter construct increased in a dose-dependent manner upon exposure of transgenic S. cerevisiae to alpha-F13. Mating between the strain expressing CaSTE2 and an opposite mating type was mediated by alpha-F13 and not by the S. cerevisiae alpha-factor. The results indicated that CaSte2p effectively coupled to the S. cerevisiae signal transduction pathway. Functional expression of CaSte2p in S. cerevisiae provides a well-defined system for studying the biochemistry and molecular biology of the C. albicans pheromone and its receptor.
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- 2005
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19. Incorporating Climate Change into Risk Assessment Using Grey Mathematical Programming
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Joe Russo, Guohe Huang, and Brad Bass
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Risk analysis ,Mathematical optimization ,Environmental Engineering ,Jump ,Climate change ,Statistical model ,General Medicine ,Interval (mathematics) ,Sensitivity (control systems) ,Management, Monitoring, Policy and Law ,Waste Management and Disposal ,Measure (mathematics) ,Fuzzy logic - Abstract
Climate change presents problems for risk assessment procedures due to the difficulty of assigning a measure of probability to any future scenario. Grey systems theory provides an alternative means of quantifying uncertainty based on interval numbers. Within a mathematical programming model, grey systems theory provides a means for working with uncertainties that are not amenable to stochastic or fuzzy quantification. An example of forestry and agricultural expansion in the Mackenzie River Basin is used to illustrate grey mathematical programming in a hop, skip and jump formulation. In this example, climatic constraints are implicitly contained in other parameters which did not incorporate the different components of uncertainty associated with meteorological observations. These components can be combined into a numerical interval that can be used in determining a grey number. However, most of these uncertainties are negligible in climatic data sets due to the number of observations. Nevertheless, these uncertainties point to some of the problems in assessing the risks of climate change, and a grey mathematical programming algorithm is useful for assessing the sensitivity of a decision to climatically sensitive parameters.
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- 1997
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20. Detection and localization of occult lesions using breast magnetic resonance imaging: initial experience in a community hospital
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Paul, Friedman, Linda, Sanders, Joe, Russo, Ron, Sharo, Srirama, Swaminathan, and Robert, Smith
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Adult ,Aged, 80 and over ,Biopsy, Needle ,Breast Neoplasms ,Hospitals, Community ,Middle Aged ,Magnetic Resonance Imaging ,Sensitivity and Specificity ,Risk Factors ,Image Processing, Computer-Assisted ,Humans ,Female ,Aged ,Retrospective Studies - Abstract
To evaluate the outcome of diagnostic breast MR imaging followed by MR guided needle localization for mammographically and sonographically occult breast lesions in a community-based hospital.Records of the initial 50 consecutive patients who underwent MR guided needle localizations at our institution from November 2001 to January 2003 were reviewed. Sixty-two lesions were localized by MR and were mammographically and sonographically occult. Pathology following excision was reviewed and correlated with the MR findings.Cancer was present in 15 % (9/62) of lesions or 18 % (9/50) of the women localized. Five of the lesions (56%) were invasive carcinoma and four (44%) were ductal carcinoma in situ (DCIS). High-risk lesions, including atypical ductal hyperplasia (ADH) and atypical lobular hyperplasia (ALH), were found in 6.5 % (4/62) of the lesions, while 3 % (2/62) of the lesions contained lobular carcinoma in situ (LCIS). Cancer plus high risk lesions were found in 15/62 (24%) lesions or 14/50 (28%) of women who underwent biopsy.The data in this study supports findings from other studies conducted by large research institutions. In this regard, it is important that community-based hospitals, such as the one operating this breast MR program, can achieve the same positive predictive values as those found in data emanating from academic institutions.
- Published
- 2005
21. Synthetic peptides as probes for conformational preferences of domains of membrane receptors
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Fred Naider, Jeffrey M. Becker, Sanjay Khare, Beatrice Severino, Boris Arshava, Joe Russo, F., Naider, S., Khare, B., Arshava, Severino, Beatrice, J., Russo, and J. M., Becker
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Models, Molecular ,Saccharomyces cerevisiae Proteins ,G-protein-coupled receptor ,Receptors, Peptide ,Protein Conformation ,Saccharomyces cerevisiae ,Molecular Sequence Data ,Biophysics ,Peptide ,Receptors, Cell Surface ,Biochemistry ,Micelle ,Biomaterials ,Cell surface receptor ,oligopeptide ,receptor loop peptides ,Extracellular ,Amino Acid Sequence ,Nuclear Magnetic Resonance, Biomolecular ,G protein-coupled receptor ,chemistry.chemical_classification ,Oligopeptide ,biology ,Circular Dichroism ,Organic Chemistry ,General Medicine ,History, 20th Century ,biology.organism_classification ,Protein Structure, Tertiary ,Transmembrane domain ,chemistry ,Molecular Probes ,Receptors, Mating Factor ,Peptides ,Transcription Factors - Abstract
Peptide models have been widely used to investigate conformational aspects of domains of proteins since the early 1950s. A pioneer in this field was Dr. Murray Goodman, who applied a battery of methodologies to study the onset of structure in homooligopeptides. This article reviews some of Dr. Goodman's contributions, and reports recent studies using linear and constrained peptides corresponding to the first extracellular loop and linear peptides corresponding to the sixth transmembrane domain of a G-protein coupled receptor from the yeast Saccharomyces cerevisiae. Peptides containing 30–40 residues were synthesized using solid-phase methods and purified to near homogeneity by reversed phase high performance liquid chromatography. CD and NMR analyses indicated that the first extracellular loop peptides were mostly flexible in water, and assumed some helical structure near the N-terminus in trifluoroethanol and in the presence of micelles. Comparison of oligolysines with native loop residues revealed that three lysines at each terminus of a peptide corresponding to the sixth transmembrane domain of the α-factor receptor resulted in better aqueous solubility and greater helicity than the native loop residues. © 2004 Wiley Periodicals, Inc. Biopolymers (Pept Sci), 2005
- Published
- 2004
22. Modelling the Biospheric Aspects of the Hydrological Cycle
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John Zack, Joe Russo, Naresh Akkur, and Brad Bass
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Weather generator ,Atmospheric circulation ,Ecology (disciplines) ,Climatology ,Mesoscale meteorology ,Biosphere ,Environmental science ,Water cycle ,Scale (map) ,Downscaling - Abstract
The International Geosphere-Biosphere Program — Biological Aspects of the Hydrological Cycle (IGBP-BAHC) is concerned with the role of the biosphere in the hydrological cycle over a range of space and time scales. One crucial emphasis in this exercise involves ‘upscaling’ or aggregating the processes in the soil-vegetation-atmosphere interface from the patch scale of ecology to the mesoscale, larger regional scales and the continental scale. In time the upscaling must move from hours to decades and even longer time periods. A second emphasis involves the ‘downscaling’ of low-resolution climatic and meteorological data to high-resolution grids that are suitable for ecological and hydrological research. These two emphases are described along with prototype models for upscaling and downscaling. Other issues such as the incorporation of land surface heterogeneity in upscaling and the classification of atmospheric circulation patterns in downscaling are discussed along with other aspects related to these emphases are presented in greater detail. In particular the discussion of the downscaling component in BAHC summarizes the results of the most recent workshops (BAHC, 1993a and b).
- Published
- 1996
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