BINARY INSTRUMENTATION AND TRANSFORMATION FOR SOFTWARE SECURITY APPLICATIONS

The capabilities of software analysis and manipulation are crucial to counter software security threats such as malware and vulnerabilities. Binary instrumentation and transformation are the essential techniques to enable software analysis and manipulation. However, existing approaches fail to meet requirements (e.g. flexibility, transparency) specific in software security applications

1-Ethyl-4-hydr­oxy-9-aza­tricyclo­[7.4.1.02,7]tetra­deca-2,4,6-trien-8-one

In the mol­ecule of the title compound, C15H19NO2, the six-membered dihydro­pyridinone ring assumes a screw-boat conformation. In the crystal structure, mol­ecules are linked via O—H⋯O hydrogen bonding between hydr­oxy and carbonyl groups, forming supra­molecular chains along the a axis

3-[(3S)-3-Ethyl-1-methyl­azepan-3-yl]phenyl N-(4-fluoro­phen­yl)carbamate

The asymmetric unit of the title compound, C22H27FN2O2, a (−)-S-meptazinol derivative, contains two mol­ecules. The azepane ring adopts a similar twist chair form in both mol­ecules, while the dihedral angles between the two benzene rings are 88.17 (14) and 89.93 (14)° in the two mol­ecules. The absolute configuration of the mol­ecule was determined from the synthetic starting material. The crystal structure is stabilized by classical inter­molecular N—H⋯O hydrogen bonds

Stochastic Dynamics of a Nonlinear Misaligned Rotor System Subject to Random Fluid-Induced Forces

In this paper, stochastic responses and behaviors of a nonlinear rotor system with the fault of uncertain parallel misalignment and under random fluid-induced forces are investigated. First, the equations of motion of the rotor system are derived by taking into account the nonlinear journal bearings, the unsymmetrical section of the shaft, and the displacement constraint between the two adjacent rotors. Then, the modeling on uncertainties of misalignment and random fluid-induced forces are developed based on the polynomial chaos expansion (PCE) technique, where the misalignment is modeled as a bounded random variable with parameter g distribution and the fluid-induced force as a random variable with standard white noise process. Finally, examples on the stochastic dynamic behaviors of the nonlinear generator-rotor system are studied, and the influences of the uncertainties on the effects of shaft misalignment, the stochastic behaviors near bifurcation point as well as the distribution of the system responses are well demonstrated

2-Methyl-1,2,3,4-tetra­hydro­isoquinolin-6-yl N-phenyl­carbamate

In the mol­ecule of the title compound, C17H18N2O2, the piperidine ring adopts a half-chair form. The two benzene rings are individually planar and make a dihedral angle of 53.90°. The crystal structure is stabilized by inter­molecular N—H⋯N hydrogen bonds and π–π stacking inter­actions (centroid–centroid distance = 3.962 Å)

(3S,4R)-3-Ethyl-4-hydr­oxy-3-(3-methoxy­phen­yl)-1-methyl­azepanium (2R,3R)-2,3-bis­(benzo­yloxy)-3-carboxy­propionate

The crystal structure of the title compound, C16H26NO2 +·C18H13O8 −, is stabilized by an extensive network of classical N—H⋯O and O—H⋯O hydrogen bonding. The crystal structure also shows an ammonium-driven diastereo­isomerism

The kinetic Shakhov-Enskog model for non-equilibrium flow of dense gases

When the average intermolecular distance is comparable to the size of gas molecules, the Boltzmann equation, based on the dilute gas assumption, becomes invalid. The Enskog equation was developed to account for this finite size effect that makes the collision non-local and increases the collision frequency. However, it is time-consuming to solve the Enskog equation due to its complicated structure of collision operator and high dimensionality. In this work, on the basis of the Shakhov model, a gas kinetic model is proposed to simplify the Enskog equation for non-ideal monatomic dense gases. The accuracy of the proposed Shakhov-Enskog model is assessed by comparing its solutions of the normal shock wave structures with the results of the Enskog equation obtained by the fast spectral method. It is shown that the Shakhov-Enskog model is able to describe non-equilibrium flow of dense gases, when the maximum local mean free path of gas molecules is still greater than the size of molecular diameter. The accuracy and efficiency of the present model enable simulations of non-equilibrium flow of dense gases for practical applications

(3S,4S)-3-Ethyl-4-hydr­oxy-3-(3-methoxy­phen­yl)-1-methyl­azepan-1-ium d-tartrate dihydrate

In the title compound, C16H26NO2 +·C4H5O6 −·2H2O, a meptaz­inol derivative, three C atoms of the azepane ring are disordered over two positions, with site-occupancy factors of 0.80 and 0.20; the major disorder component adopts a twist-chair conformation, while the minor component has a chair conformation. The benzene ring is axially substituted on the heterocyclic ring, resulting in a folded conformation of the cation. The absolute configuration was determined with reference to d-tartaric acid. The crystal structure is stabilized by an extensive network of intra- and inter­molecular O—H⋯O hydrogen bonds

Landscape of variable domain of heavy‐chain‐only antibody repertoire from alpaca

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/156425/2/imm13224_am.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/156425/1/imm13224.pd

(E)-6-Meth­oxy-9-methyl-1,2,3,4-tetra­hydro-9H-carbazol-4-one oxime

The title compound, C14H16N2O2, is dimerized by inversion-related inter­molecular O—H⋯O and O—H⋯N hydrogen bonding. There is also an intra­molecular C—H⋯N bond, resulting in a six-membered ring