(E)-N′-[(E)-3-(4-Hydr­oxy-3-methoxy­phen­yl)allyl­idene]isonicotinohydrazide

In the title compound, C16H15N3O3, the dihedral angle between the pyridine and benzene rings is 7.66 (5)°. The crystal packing is consolidated by inter­molecular C—H⋯O and O—H⋯N inter­actions, which link the mol­ecules into zigzag chains propagating along [010]. The chains are further linked into a three-dimensional network by N—H⋯O, C—H⋯N, C—H⋯O and C—H⋯π inter­actions

Bis{(E)-N′-[2,4-bis(trifluoro­meth­yl)benzyl­idene]isonicotinohydrazide} monohydrate

The asymmetric unit of the title compound, 2C15H9F6N3O·H2O, contains two independent Schiff base mol­ecules and one water mol­ecule. Both Schiff base mol­ecules exist in an E configuration with respect to the C=N double bonds and the dihedral angles between the benzene and the pyridine rings in the two mol­ecules are 17.53 (12) and 20.62 (12)°. In the crystal structure, mol­ecules are linked by inter­molecular N—H⋯O and C—H⋯O hydrogen bonds into infinite one-dimensional chains along the a axis. In addition, inter­molecular O—H⋯N, O—H⋯F, C—H⋯F and C—H⋯O hydrogen bonds further link these chains into a three-dimensional network. Weak π–π inter­actions with centroid–centroid distances in the range 3.6495 (17)–3.7092 (16) Å are also observed

(E)-N’-(2,3,4-Trimethoxy­benzyl­idene)isonicotinohydrazide

In the title compound, C16H17N3O4, the mol­ecule exists in an E configuration with respect to the C=N double bond. The mol­ecule is not planar, the dihedral angle between the pyridine and benzene rings being 71.67 (8)°. In the crystal structure, mol­ecules are linked into chains along the b axis by bifurcated N—H⋯O and C—H⋯O hydrogen bonds. These chains are linked into a three-dimensional network by C—H⋯O and C—H⋯π inter­actions

(E)-N′-(2,4,6-Trimethyl­benzyl­idene)isonicotinohydrazide

The title isoniazid derivative, C16H17N3O, exists in an E configuration with respect to the Schiff base C=N bond. The pyridine ring is essentially planar [maximum deviation = 0.009 (3) Å]. The mean plane through the hydrazide unit forms dihedral angles of 38.38 (16) and 39.42 (16)°, respectively, with the pyridine and benzene rings. In the crystal structure, symmetry-related mol­ecules are linked via inter­molecular N—H⋯O hydrogen bonds into chains along [100]. The crystal structure is further stabilized by weak inter­molecular C—H⋯π inter­actions

Interconnection, Interface And Instrumentation For Micromachined Chemical Sensors

In realizing a portable chemical analysis system, adequate partitioning of a reusable component and a disposable is required. For successful implementation of micromachined sensors in an instrument, reliable methods for interconnection and interface are in great demand between these two major parts. This thesis work investigates interconnection methods of micromachined chip devices, a hybrid fluidic interface system, and measurement circuitry for completing instrumentation. The interconnection method based on micromachining and injection molding techniques was developed and an interconnecting microfluidic package was designed, fabricated and tested. Alternatively, a plug-in type design for a large amount of sample flow was designed and demonstrated. For the hybrid interface, sequencing of the chemical analysis was examined and accordingly, syringe containers, a peristaltic pump and pinch valves were assembled to compose a reliable meso-scale fluidic control unit. A potentiostat circuit was modeled using a simulation tool. The simulated output showed its usability toward three-electrode electrochemical microsensors. Using separately fabricated microsensors, the final instrument with two different designs--flow-through and plug-in type was tested for chlorine detection in water samples. The chemical concentration of chlorine ions could be determined from linearly dependent current signals from the instrument

(E)-N′-(2-Benzyl­oxybenzyl­idene)isonicotinohydrazide methanol solvate monohydrate

The title compound, C20H17N3O2·CH4O·H2O, was synthesized by the condensation reaction of 2-benzyl­oxybenzaldehyde with isoniazid (isonicotinic acid hydrazide). The tricyclic compound displays a trans configuration with respect to the C=N double bond. The central benzene ring makes dihedral angles of 8.83 (7) and 70.39 (8)° with the pyridine ring and the terminal benzene ring, respectively. The dihedral angle between the pyridine ring and the terminal benzene ring is 73.11 (8)°. In the crystal structure, mol­ecules are connected by inter­molecular N—H⋯O, O—H⋯O, O—H⋯(N,N) and C—H⋯O hydrogen bonds, forming a two-dimensional network perpendicular to the a axis

(E)-N′-(2,4,6-Trihydroxy­benzyl­idene)isonicotinohydrazide sesquihydrate

In the title compound, C13H11N3O4·1.5H2O, the pyridine ring forms a dihedral angle of 1.50 (6)° with the benzene ring. An intra­molecular O—H⋯N hydrogen bond forms a six-membered ring with an S(6) ring motif. In the crystal structure, one water mol­ecule is disordered over two positions around an inversion centre with site-occupancy factors of 0.5. Inter­molecular O—H⋯N, O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds consolidate the structure into a three dimensional network. A π–π stacking inter­action with a centroid–centroid distance of 3.5949 (7) Å is also present

Learning Representations from Spatio-Temporal Distance Maps for 3D Action Recognition with Convolutional Neural Networks

This paper addresses the action recognition problem using skeleton data. In this work, a novel method is proposed, which employs five Distance Maps (DM), named as Spatio-Temporal Distance Maps (ST-DMs), to capture the spatio-temporal information from skeleton data for 3D action recognition. Among five DMs, four DMs capture the pose dynamics within a frame in the spatial domain and one DM captures the variations between consecutive frames along the action sequence in the temporal domain. All DMs are encoded into texture images, and Convolutional Neural Network is employed to learn informative features from these texture images for action classification task. Also, a statistical based normalization method is introduced in this proposed method to deal with variable heights of subjects. The efficacy of the proposed method is evaluated on two datasets: UTD MHAD and NTU RGB+D, by achieving recognition accuracies91.63% and 80.36% respectively

Performance of a Farmer Interest Group in Tamil Nadu

The present study was undertaken with an objective to find out the performance of Old Ayakudi guava Farmers’ Interest Group (FIG), Dindigul district, Tamil Nadu. The overall performance of the FIG were analysed using six variables viz., mobilizing support, exploitation resistance, identifying market opportunities, business orientation, marketing network and responsibility sharing The study revealed that majority of the FIG members perceive the performance of FIG at moderate level performance followed by high and low level performance