1-(4-Meth­oxy­phen­yl)-4-(3-nitro­phen­yl)-3-phen­oxy­azetidin-2-one

In the title compound, C22H18N2O5, the four-membered β-lactam ring is nearly planar, with a maximum deviation of 0.023 (2) Å for the N atom, and has long C—C distances of 1.525 (5) and 1.571 (5) Å. The mean plane of this group makes dihedral angles of 11.61 (19), 74.5 (2) and 72.3 (2)° with three aromatic rings. An intra­molecular C—H⋯O hydrogen bond occurs. The packing of the mol­ecules in the crystal structure is governed mainly by inter­molecular C—H⋯O hydrogen-bonding and C—H⋯π stacking inter­actions. Furthermore, a π–π inter­action [centroid–centroid distance = 3.6129 (19) Å] helps to stabilize the crystal structure

Analog CMOS implementation of cellular neural networks

Ankara : Department of Electrical and Electronics Engineering and Institute of Engineering and Sciences, Bilkent Univ., 1991.Thesis (Master's) -- Bilkent University, 1991.Includes bibliographical references leaves 38-39An analog CMOS circuit realization of cellular neural networks with transconductance elements is presented in this thesis. This realization can be easily adapted to various types of applications in image processing by just choosing the appropriate transconductance parameters according to the predetermined coefficients. The noise-reduction and edge detection examples have shown the effectiveness of the designed networks in real time image processing applications. For “fix function” cellular neural network circuits the number of transistors are reduced further by a new multi-input voltage-controlled current source.Baktır, İzzet AdilM.S

(E)-1-(4,4′′-Difluoro-5′-meth­oxy-1,1′:3′,1′′-terphenyl-4′-yl)-3-(4-methyl­phen­yl)prop-2-en-1-one

In the meta-terphenyl fragment of the title mol­ecule, C29H22F2O2, the two fluoro­phenyl rings are twisted from the central benzene ring by 46.72 (6) and 41.70 (6)°, respectively. In the crystal, weak C—H⋯O and C—H⋯F hydrogen bonds link the mol­ecules into layers parallel to the ab plane. The crystal packing exhibits π–π inter­actions, the shortest distance between the centroids of aromatic rings being 3.6364 (7) Å

3,5-Bis(4-meth­oxy­phen­yl)-1-phenyl-4,5-dihydro-1H-pyrazole

In the title compound, C23H22N2O2, the central pyrazole ring is nearly planar (r.m.s. deviation = 0.046 Å) and it makes a dihedral angle of 18.5 (2)° with the phenyl ring. The dihedral angles between the phenyl and the two meth­oxy-substituted phenyl rings are 26.2 (2) and 80.6 (2)°. The crystal structure is stabilized by C—H⋯π stacking inter­actions and weak π–π inter­actions [centriod–centroid distance = 3.891 (2) Å]

(±)-trans-6,7-Dimeth­oxy-1-oxo-3-(2-thien­yl)isochroman-4-carboxylic acid

The title compound, C16H14O6S, was synthesized by the reaction of 6,7-dimethoxy­homophthalic anhydride with thio­phene-2-carbaldehyde in the presence of 4-(dimethyl­amino)pyridine (DMAP) as a basic catalyst. The thio­phene ring of the title mol­ecule is disordered over two sites with occupancies of 0.877 (3) and 0.123 (3). The disorder corresponds to an approximate 180° rotation of the thio­phene ring with respect to the C—C bond linking it to the rest of the mol­ecule. The six-membered ring of the 3,4-dihydro­isochromanone ring system is not planar [puckering parameters Q T = 0.571 (2) Å, θ = 115.2 (2)° and ϕ = 99.1 (2)°]. The benzene ring of the 3,4-dihydro­isochromanone ring system makes dihedral angles of 75.0 (2) and 77.2 (5)° with the disordered thio­phene rings. Inter­molecular O—H⋯O and C—H⋯O hydrogen bonds, as well as C—H⋯π inter­actions, lead to the observed supra­molecular structure

3,5-Bis(4-fluoro­phen­yl)-4,5-dihydro-1H-pyrazole-1-carbaldehyde

In the title mol­ecule, C16H12F2N2O, the pyrazole ring adopts a slight envelope conformation with the methyl­ene C atom deviating by 0.114 (3) Å from the mean plane of the other four atoms [maximum deviation = 0.021 (3) Å]. The dihedral angles between the four essentially planar atoms of the pyrazole ring and the fluoro-substituted benzene rings are 2.6 (2) and 82.2 (2)°. The dihedral angle between the two benzene rings is 83.7 (2)°. The crystal packing is stabilized by weak inter­molecular C—H⋯O hydrogen bonds

(E)-1-(4,4′′-Difluoro-5′-meth­oxy-1,1′:3′,1′′-terphenyl-4′-yl)-3-(4-nitro­phen­yl)prop-2-en-1-one

In the title compound, C28H19F2NO4, a polysubstituted terphenyl derivative bearing a Michael system, the C=C double bond has an E configuration. Two C—H⋯F contacts connect mol­ecules into inversion dimers. In addition, a C–H⋯π as well as a C–F⋯π contact can be identified. The shortest centroid–centroid distance between two aromatic rings is 3.9535 (8) Å, between one of the para-fluoro­benzene rings and its symmetry-generated equivalent

(E)-1-(4,4′′-Difluoro-5′-meth­oxy-1,1′:3′,1′′-terphenyl-4′-yl)-3-phenyl­prop-2-en-1-one

The title compound, C28H20F2O2, is a polysubstituted terphenyl derivative bearing a Michael system. The C=C double bond is E configured. In the crystal, C—H⋯O and C—H⋯F contacts connect the mol­ecules, forming undulating sheets that lie perpendicular to the crystallographic a axis. The shortest π–π inter­action [centroid–centroid distance = 3.7163 (7) Å] involves the para-fluoro­phenyl ring in the para position to the Michael system, and its symmetry-generated equivalent

The Dutiful Daughters of the British Empire: Psychosocial Topology of The British Hospital in Smyrna

Scholarship on the accounts of the Western travellers about the Ottoman Empire focuses on some commonly known writers only, and Ismeer, or Smyrna, and its British hospital in 1855, by a lady (M. Nicol) remains neglected. It is a diary written by a lady-nurse, Martha Nicol, who worked in the British hospital in Smyrna, during the Crimean War. She is tightly bound in with the imperial ideology and by reconceptualising the space in the hospital, the lady-nurses help the British soldiers achieve a sense of continuity between their home back in England and the host culture about which they know very little. By playing a formative role to transpose this hospital to a homely space in a foreign territory, the lady-nurses function as psychic and cultural stabilisers. This essay aims to decipher how the hospital space functions as an ideological heterotopia of deviance, and how the lady-nurses contribute to its power to inspire the idea of "at-homeness" in the soldiers and retain the ideological structuring mechanisms in this distant location by exploring the textual evidence in the book. This essay will also explore how power and ideology are contextualised in the psychosocial topology of the hospital

4-(9-Anthr­yl)-1-(2,4-dimethoxy­phen­yl)spiro­[azetidine-3,9′-xanthen]-2-one

The title compound, C37H27NO4, crystallizes with two mol­ecules in the asymmetric unit. The β-lactam ring of each mol­ecule is very nearly planar, with maximum deviations of 0.001 (2) and 0.017 (2) Å in the two mol­ecules. The crystal structure is stabilized by inter­molecular C—H⋯O and C—H⋯N contacts, as well as by weak C—H⋯π inter­actions