Predicting Exploitation of Disclosed Software Vulnerabilities Using Open-source Data

Each year, thousands of software vulnerabilities are discovered and reported to the public. Unpatched known vulnerabilities are a significant security risk. It is imperative that software vendors quickly provide patches once vulnerabilities are known and users quickly install those patches as soon as they are available. However, most vulnerabilities are never actually exploited. Since writing, testing, and installing software patches can involve considerable resources, it would be desirable to prioritize the remediation of vulnerabilities that are likely to be exploited. Several published research studies have reported moderate success in applying machine learning techniques to the task of predicting whether a vulnerability will be exploited. These approaches typically use features derived from vulnerability databases (such as the summary text describing the vulnerability) or social media posts that mention the vulnerability by name. However, these prior studies share multiple methodological shortcomings that inflate predictive power of these approaches. We replicate key portions of the prior work, compare their approaches, and show how selection of training and test data critically affect the estimated performance of predictive models. The results of this study point to important methodological considerations that should be taken into account so that results reflect real-world utility

THE ROLE OF PROCEDURAL JUSTICE WITHIN POLICE-CITIZEN CONTACTS IN EXPLAINING CITIZEN BEHAVIORS AND OTHER OUTCOMES

American policing is shaped by an array of challenges. Police are expected to address crime and engage the community, yet police are held to higher expectations of accountability, effectiveness, and efficiency than ever before. Police legitimacy is the ability of the police to exercise their authority in the course of maintaining order, resolving conflicts, and solving problems (PERF, 2014). The procedural justice and police legitimacy literature suggest that by exhibiting procedurally just behaviors within police-citizen encounters, officers are considered legitimate by the public (PERF, 2014; Tyler, 2004, Tyler & Jackson, 2012). This study examines procedural justice through systematic observations of police-citizen encounters recorded by body worn cameras in one mid-Atlantic police agency. The four elements of procedural justice (participation, neutrality, dignity and respect, and trustworthiness) are assessed to examine police behavior and its outcomes. The research questions concern how police acting in procedurally just ways may influence citizen behaviors. Descriptive statistics indicate high levels of procedural justice. Regression analyses suggest that procedural justice may predict positive citizen behaviors within police-citizen encounters. This study highlights the significance of procedural justice as an antecedent to police legitimacy and offers a new mode of observation: body worn camera footage

Banning open carry of unloaded handguns decreases firearm-related fatalities and hospital utilization.

BackgroundSince 1967, in California it has been illegal to openly carry a loaded firearm in public except when engaged in hunting or law enforcement. However, beginning January 1, 2012, public open carry of unloaded handguns also became illegal. Fatal and non-fatal (NF) firearm injuries were examined before and after adoption of the 2012 ban to quantify the effect of the new law on public health.MethodsState-level data were obtained directly from California and nine other US state inpatient and emergency department (ED) discharge databases, and the Centers for Disease Control Web-Based Injury Statistics Query and Reporting System. Case numbers of firearm fatalities, NF hospitalizations, NF ED visits, and state-level population estimates were extracted. Each incident was classified as unintentional, self-inflicted, or assault. Crude incidence rates were calculated. The strength of gun laws was quantified using the Brady grade. There were no changes to open carry in these nine states during the study. Using a difference-in-difference technique, the rate trends 3 years preban and postban were compared.ResultsThe 2012 open carry ban resulted in a significantly lower incident rate of both firearm-related fatalities and NF hospitalizations (p<0.001). The effect of the law remained significant when controlling for baseline state gun laws (p<0.001). Firearm incident rate drops in California were significant for male homicide (p=0.023), hospitalization for NF assault (p=0.021  male; p=0.025 female), and ED NF assault visits (p=0.04). No significant decreases were observed by sex for suicides or unintentional injury. Changing the law saved an estimated 337 lives (3.6% fewer deaths) and 1285 NF visits in California during the postban period.DiscussionOpen carry ban decreases fatalities and healthcare utilization even in a state with baseline strict gun laws. The most significant impact is from decreasing firearm-related fatal and NF assaults.Level of evidenceIII, epidemiology

The continuing materials analysis of the thermal control surfaces experiment (S0069)

The long term effects of the natural and induced space environment on spacecraft surfaces are critically important to future spacecraft - including Space Station Freedom. The damaging constituents of this environment include thermal vacuum, solar ultraviolet radiation, atomic oxygen, particulate radiation, and the spacecraft induced environment. The behavior of materials and coatings in the space environment continues to be a limiting technology for spacecraft and experiments. The Thermal Control Surfaces Experiment (TCSE) was flown on the National Aeronautics and Space Administration (NASA) Long Duration Exposure Facility (LDEF) to study these environmental effects on surfaces-particularly on thermal control surfaces. The TCSE was a comprehensive experiment that combined in-space measurements with extensive pre- and post-flight analyses of thermal control surfaces to determine the effects of exposure to the low Earth orbit space environment. The TCSE is the first space experiment to directly measure the total hemispherical reflectance of thermal control surfaces in the same way they are routinely measured in the laboratory. The trend analyses of selected coatings performed as part of the continuing post-flight analysis of the TCSE are described. A brief description of the TCSE and its mission on LDEF are presented. There are several publications available that describe the TCSE, it's mission on LDEF, and initial results in greater detail. These are listed in the TCSE Bibliography

Rezension: Weber, Tassja (2020): Präpositionen und Deutsch als Fremdsprache: Quantita-tive Fallstudien im Lernerkorpus MERLIN

In ihrer Studie, welche zugleich als Dissertation an der Universität Mannheim vor-gelegt wurde, beschäftigt sich Tassja Weber mit Präpositionen und Deutsch als Fremdsprache – so lautet auch der Titel der Arbeit. Ausgangspunkt der Studie ist der Befund, dass die Verwendung von Präpositionen und Präpositionalphrasen (fol-gend mit PP abgekürzt) eine große Schwierigkeit (vgl. Fandrych/Thurmair 2018: 189) darstellt und einen durchaus komplexen Lerngegenstand für Deutschlernende bildet (vgl. Turgay 2010: 1). Dabei liegt die konstatierte Herausforderung des Lern-gegenstands in der Bedeutung der Präposition, ihrer Kasusrektion und ihrer Bin-dung an spezifische Verben (vgl. Hoffmann 2016), wie auch in der „Realisierung einer zielsprachlich korrekten Präposition“. Es geht Weber also um die Frage nach dem konkreten Gebrauch der richtigen Präposition innerhalb einer PP (Weber 2020: 1), wobei sich die Autorin hier auf Grießhaber (2010: 306) beruft. Unsicherheiten beim Gebrauch von Präpositionen und PP manifestieren sich bei DaF-Lernenden dabei nicht nur in der Wahl der korrekten Präposition, sondern auch in Auslassun-gen von Präpositionen und PP oder in Hinzufügungen von Präpositionen bzw. PP in Kontexten, in denen zielsprachlich keine Präposition bzw. PP gefordert ist (We-ber 2020: 1–2)

Fluorescence of thermal control coatings on S0069 and A0114

Many of the thermal control surfaces exposed to the space environment during the 5.8 year LDEF mission experienced changes in fluorescence. All of the thermal control coatings flown on LDEF experiments S0069 and A0114 were characterized for fluorescence under ambient conditions. Some of the black coatings, having protective overcoats, appear bright yellow under ultraviolet exposure. Urethane based coatings exhibited emission spectra shifts toward longer wavelengths in the visible range. Zinc oxide pigment based coatings experienced a quenching of fluorescence, while zinc orthotitanate pigment based and other ceramic type coatings had no measurable fluorescence

Fluorescence measurements of the thermal control experiments coatings on LDEF S0069 and A0114

Fluorescence measurements were made on the thermal control coatings from the Long Duration Experiment Facility (LDEF) S0069, Thermal Control Surfaces Experiment (TCSE); and the A0114, Interaction of Atomic Oxygen with Material Surfaces in Low Earth orbit. Fluorescence was observed in two types of thermal control coatings and is attributed to pigments or binders. In addition, fluorescence measurement on the silver Teflon from the front cover of TCSE led to confirmation of damage (cracking) to the metal layers during application

Cryptorchidism and Infertility in Rats with Targeted Disruption of the Adamts16 Locus

A Disintegrin And Metalloproteinase with ThromboSpondin motifs16 (ADAMTS-16) is a member of a family of metalloproteinases. Using a novel zinc-finger nuclease based gene-edited rat model harboring a targeted mutation of the Adamts16 locus, we previously reported this gene to be linked to blood pressure regulation. Here we document our observation with this model that Adamts16 is essential for normal development of the testis. Absence of Adamts16 in the homozygous Adamts16(mutant) males resulted in cryptorchidism and male sterility. Heterozygous Adamts16(mutant) males were normal, indicating that this is a recessive trait. Testes of homozygous Adamts16(mutant) males were significantly smaller with significant histological changes associated with the lack of sperm production. Temporal histological assessments of the testis demonstrated that the seminiferous tubules did not support active spermatogenesis, but progressively lost germ cells, accumulated vacuoles and did not have any sperm. These observations, taken together with our previous report of renal abnormalities observed with the same Adamts16(mutant) rats, suggest an important mechanistic link between Adamts16 and the functioning of the male genitourinary system

Diskurse – digital: Theorien, Methoden, Fallstudien - ein von der DFG gefördertes Netzwerk zur Analyse digitaler Diskurse (2016–2020)

Bericht des letzten von sechs Arbeitstreffen im November 2019 mit Vorträgen von Eva Gredel, Hans-Jürgen Bucher und Katharina Christ, Noah Bubenhofer, Michael Bender, Ruth M. Mell, Janine Luth, Friedemann Vogel, Konstanze Marx, Simon Meier-Vieracker, Thomas Gloning, Lena Fölsche und Christian Pentzold, Fabian Klinker