Spacecraft Formation Control: Managing Line-of-Sight Drift Based on the Dynamics of Relative Motion

In a quest to improve space-based observational capability, an increasing number of investigators are proposing missions with precision formation flying architectures. Typical missions include the Micro- Arcsecond X-ray Imaging Mission (MAXIM), Stellar Imager (SI), and the New Worlds Observer (NWO). Missions designed to explore targets in deep-space generally require holding a formation configuration fixed in inertial space during science observation. Analysis in this paper is specifically aimed at the NWO architecture, characterizing the natural drift of the line-of-sight and the separation range for two spacecraft operating in the vicinity of the Earth/Moon-Sun L(sub 2) libration point. Analysis employs a linear form of the relative dynamics associated with an n-body gravity field. The study is designed to identify favorable observation directions, characterized by minimal line-of-sight drift, along the mission timeline

Chronisches Schmerzsyndrom des Beckens: Neurostimulation, Neuromodulation und Akupunktur

Zusammenfassung: Das chronische Schmerzsyndrom des Beckens ("chronic pelvic pain syndrome", CPPS) ist gemäß den Richtlinien der "European Association of Urology" charakterisiert als ein nicht-maligner Schmerz, der in Bezug auf die Strukturen des weiblichen oder männlichen Beckens über einen Zeitraum von mindestens 6Monaten wahrgenommen wird, ohne dass eine Infektion oder offensichtliche anderweitige Pathologie vorliegt. Das CPPS beeinträchtigt die Lebensqualität von Millionen von Menschen weltweit und hat einen ähnlich großen Einfluss wie andere chronische Krankheiten, z.B. Diabetes mellitus, Morbus Crohn oder kongestive Herzinsuffizienz. Trotz mehrerer etablierter Erstlinientherapien stellt die Behandlung des CPPS eine große Herausforderung dar, da viele Patienten therapierefraktär bleiben. Unkonventionelle Behandlungsmethoden wie Neurostimulation, Neuromodulation und Akupunktur können beim CPPS eine ausgezeichnete Wirkung zeigen und haben ein vorteilhaftes Nebenwirkungsprofil. So sollten diese vielversprechenden Therapieverfahren im klinischen Alltag vermehrt eingesetzt werde

Computational Investigation of Molecular Optoelectronic and Biological Systems

The scope of work in this dissertation has comprised several major investigations on applications and theoretical studies of ab initio quantum mechanics and density functional theory where those techniques were applied to the following: (i) investigation of the performance of density functionals for the computations of molecular properties of 3d transition metal containing systems; (ii) guidance for experimental groups for rational design of macrometallocyclic multinuclear complexes with superior π-acidity and π-basicity that are most suitable for p- and n-type semiconductors of metal-organic molecules and nanomaterials; (iii) investigation of the metallo-aromaticity of multi-nuclear metal complexes; (iv) investigation of the kinetics and thermodynamics of copper-mediated nitrene insertion into C-H and H-H bond; and (v) accurate computations of dissociation energies of hydrogen-bonded DNA duplex moieties utilizing the resolution of identity correlation consistent composite approach (RI-ccCA)

5,5-Dimethyl-2,2-bis­(pyridin-2-yl)-1,3-diazinane

In the mol­ecule of the title compound, C16H20N4, the 1,3-diazinane ring adopts a chair conformation and the dihedral angle formed by the pyridine rings is 78.64 (8)°. The mol­ecular conformation is stabilized by an intra­molecular C—H⋯N hydrogen bond, forming an S(6) ring motif. In the crystal, centrosymmetrically related mol­ecules are linked into dimers by pairs of N—H⋯N hydrogen bonds, generating rings of R 2 2(10) graph-set motif

N-(Biphenyl-4-ylcarbon­yl)-N′-(2-pyridylmeth­yl)thio­urea

In the title compound, C20H17N3OS, the dihedral angle between the benzene rings of the biphenyl fragment is 36.84 (9)°. The trans–cis geometry of the thio­urea unit is stabilized by intra­molecular N—H⋯O and N—H⋯N hydrogen bonds between the H atom of the cis thio­amide and the carbonyl O and pyridine N atoms, respectively. In the crystal structure, inter­molecular N—H⋯S hydrogen bonds form centrosymmetric dimers extending along the b axis

Drug repurposing: In-vitro anti-glycation properties of 18 common drugs

Drug repositioning or repurposing, i.e. identifying new indications for existing drugs, has gained increasing attention in the recent years. This approach enables the scientists to discover ?new targets? for known drugs in a cost and time efficient manner. Glycation, the non-enzymatic reaction of sugars with proteins or nucleic acids to form early glycation (Amadori or fructosamine) products, is a key molecular basis of diabetic complications. Inhibiting the process of non-enzymatic protein glycation is one of the key strategies to prevent glycation-mediated diabetic complications. The present study focuses on the anti-glycation activity of 18 drugs, commonly used for the treatment of gastrointestinal, central nervous system, inflammatory diseases, bacterial infections, and gout. This study was carried out by using two in-vitro protein anti-glycation assay models. Results revealed that nimesulide (3), a non-steroidal anti-inflammatory drug, possesses a good anti-glycation activity in in-vitro BSA-MG and BSA-glucose glycation models with IC50 values of 330.56 ± 2.90, and 145.46 ± 16.35 μM, respectively. Phloroglucinol dihydrate (11), a drug used for the treatment of gastrointestinal diseases, showed a weak activity in BSA-MG glycation model (IC50 = 654.89 ± 2.50 μM), while it showed a good activity in BSA-glucose assay (IC50 = 148.23 ± 0.15 μM). Trimethylphloroglucinol (9), a drug used for the treatment of pain related to functional disorders of the digestive and biliary tracts, also showed a good antiglycation activity in BSA-MG model (IC50 = 321.15 ± 1.26 μM), while it was found to be inactive in in-vitro BSA-glucose assay (IC50 = 12.95% inhibition). These activities of drugs were compared with the anti-glycation activity of the standard, rutin (IC50 = 294.5 ± 1.50 μM in BSA-MG glycation model, and IC50 = 86.94 ± 0.24 μM in BSA- glucose model). Rest of the drugs exhibited a relatively weak antiglycation activity. This study identifies nimesulide (3), and phloroglucinol dihydrate (11) as new inhibitors of in-vitro protein glycation for further investigations as potential anti-diabetic agents.Fil: Rasheed, Saima. University of Karachi; PakistánFil: Sanchez, Sara Serafina del V.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; ArgentinaFil: Yousuf, Sammer. University of Karachi; PakistánFil: Honore, Stella Maris. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; ArgentinaFil: Choudhary, M. Iqbal. King Abdulaziz University; Arabia Saudita. University of Karachi; Pakistá