Synthesis of porous coordination polymers comprising Zn2+, triazole， and oxalic acid under magnetic fields and their adsorptivity for carbon dioxide.（Zn2+，トリアゾールおよびシュウ酸を含む多孔性配位高分子の磁場中合成とそれらの二酸化炭素吸着能）

信州大学(Shinshu university)博士（学術）ThesisMoondra Zubir. Synthesis of porous coordination polymers comprising Zn2+, triazole， and oxalic acid under magnetic fields and their adsorptivity for carbon dioxide.（Zn2+，トリアゾールおよびシュウ酸を含む多孔性配位高分子の磁場中合成とそれらの二酸化炭素吸着能）. 信州大学, 2017, 博士論文. 博士（学術）, 乙第45号, 平成29年03月20日授与.doctoral thesi

Visualizing Interior And Exterior Jet Aircraft Noise

In today\u27s competitive aerospace industry, the quest for quiet has drawn significant attention to both the interior and exterior design of an airplane. Understanding the noise generation mechanisms of a jet aircraft is a crucial first step toward developing the most cost-effective noise and vibrations abatement methods. In this investigation, the Helmholtz Equation Least Squares (HELS) based nearfield acoustic holography will be used to understand noise transmission caused by jet engine and turbulence into the fuselage of a jet aircraft cruising at 30,000 ft. Modern propulsive jet engines produce exterior noise sources with a high amplitude noise field and complicated characteristics, which makes them very difficult to characterize. In particular, there are turbulent eddies that are moving through the jet at high speeds along the jet boundary. These turbulent eddies in the shear layer produce a directional and frequency dependent noise. The original HELS approach assumes a spherical source at the origin and computes the acoustic field based on spherical emission from this source. This assumption of one source at the origin is not sufficient to characterize a complex source like a jet. As such, a modified HELS approach is introduced that will help improve the source characterization as it is not dependent on a single source at the origin but a number of virtual sources throughout the space. Custom microphones are created to take acoustic pressure measurements around the jet engine. These measured acoustic pressures are then taken as input to the modified HELS algorithm to visualize the noise pattern of a subsonic jet engine

Socially Fair and Hierarchical Facility Location Problems

The classic facility location problem seeks to open a set of facilities to minimize the cost of opening the chosen facilities and the total cost of connecting all the clients to their nearby open facilities. Such an objective may induce an unequal cost over certain socioeconomic groups of clients, e.g., the average distance traveled by clients who do not have health insurance. To reduce the disproportionate impact of opening new facilities such as emergency rooms, we consider minimizing the Minkowski $p$-norm of the total distance traveled by each client group and the cost of opening facilities. We show that there is a small portfolio of solutions where for any norm, at least one of the solutions is a constant-factor approximation with respect to any $p$-norm, thereby alleviating the need for deciding on a particular value of $p$ to define what might be "fair". We also give a lower bound on the cardinality of such portfolios. We further introduce the notion of weak and strong refinements for the facility location problem, where the former requires that the set of facilities open for a lower $p$-norm is a superset of those open for higher $p$-norms, and the latter further imposes a partition refinement over the assignment of clients to open facilities in different norms. We give an $O(1)$-approximation for weak refinements, $\text{poly}(r^{1/\sqrt{\log r}})$-approximation for strong refinement in general metrics and $O(\log r)$-approximation for the tree metric, where $r$ is the number of (disjoint) client groups. We show that our techniques generalize to hierarchical versions of the facility location problem, which may be of independent interest

Reusing Combinatorial Structure: Faster Iterative Projections over Submodular Base Polytopes

Optimization algorithms such as projected Newton's method, FISTA, mirror descent and its variants enjoy near-optimal regret bounds and convergence rates, but suffer from a computational bottleneck of computing "projections'' in potentially each iteration (e.g., $O(T^{1/2})$ regret of online mirror descent). On the other hand, conditional gradient variants solve a linear optimization in each iteration, but result in suboptimal rates (e.g., $O(T^{3/4})$ regret of online Frank-Wolfe). Motivated by this trade-off in runtime v/s convergence rates, we consider iterative projections of close-by points over widely-prevalent submodular base polytopes $B(f)$. We develop a toolkit to speed up the computation of projections using both discrete and continuous perspectives. We subsequently adapt the away-step Frank-Wolfe algorithm to use this information and enable early termination. For the special case of cardinality based submodular polytopes, we improve the runtime of computing certain Bregman projections by a factor of $\Omega(n/\log(n))$. Our theoretical results show orders of magnitude reduction in runtime in preliminary computational experiments

Tcnq-based Porous Coordination Polymers Synthesis and Sorption Properties Study in Magnetic Field

Porous coordination polymers (PCPs) were synthesized with used TCNQ anion that acts as cross linker connecting and bipyridine to form a 3D framework. In these study, we use zinc and manganese metal ion as centre of complex coordination. Green crystal of Zn(TCNQ-TCNQ)bpy.1.5 benzene and Mn(TCNQ-TCNQ)bpy.1.5 benzene was successfully synthesized in no under magnetic field (0T) and under magnetic field 6T. XRD patterns of Zn(TCNQ-TCNQ)bpy.1.5 benzene 0T and 6T shown not significant different pattern that indicate no different crytal formed. XRD patterns of Mn(TCNQ-TCNQ)bpy.1.5 benzene also shown not significant different but we found five different intensity ratio peaks that possibility it was a little bit changing of crystal structure. To investigate the pores properties, adsorption isotherm was performe for oxygen gas in 77 K and the guest of benzene were removed at 413 K for 3 hours under low pressure. Zn(TCNQ-TCNQ)bpy}1.5benzene 0T and 6T oxygen adsorption isotherms shows the unique sorption isotherms by gate pressure profile. On other hand, Mn(TCNQ-TCNQ)bpy}1.5 benzene 0T and 6T shows type 1 adsorption isotherms for micropores materials. Adsorption isotherm was also determined in magnetic field 6T for all crystal, and shows shift of gate pressure for Zn compounds and enhance the amount of oxygen adsorbed for all kind of compounds

Pencil Lead Electrode Modified with Gold Thin Layer for Voltammetric Detection of Chromium (VI)

Cr(VI) is a toxic, mutagenic, and carcinogenic metal. This heavy metal have effect harmful on organism and the environment. In this study, an electroanalytic approach was improved for detection of the Cr(VI) using a pencil lead electrode modified with gold thin layer by cyclic voltammetry. Gold thin layer was electrodeposited on the pencil lead electrode surface with potential-sweeping technique at scan of potential from 1.2 V to 0 V. Since the Cr(VI) species depends on the pH, effect of supporting electrolytes matrix at various pH were investigated. It was found that Cr(VI) gave a reduction peak with a peak potential of 0.35 V vs Ag/AgCl in cyclic voltammogram with 0.1M HClO4 as supporting electrolyte. The calibration curve for Cr(VI) at gold thin layer modified pencil lead electrode shows linearity in range of 5 µM to 100 µM with a detection limit of 2.3 µM achieved

Generating Target Graph Couplings for QAOA from Native Quantum Hardware Couplings

We present methods for constructing any target coupling graph using limited global controls in an Ising-like quantum spin system. Our approach is motivated by implementing the quantum approximate optimization algorithm (QAOA) on trapped ion quantum hardware to find approximate solutions to Max-Cut. We present a mathematical description of the problem and provide approximately optimal algorithmic constructions which generate arbitrary unweighted coupling graphs with $n$ nodes in $O(n)$ global control pulses and weighted graphs with $m$ edges in $O(m)$ pulses. These upper bounds are not tight in general, and we formulate a mixed-integer program to solve the graph coupling problem to optimality. We perform numeric experiments on small graphs with $n \le 8$ show that optimal pulse sequences, which use fewer operations, can be found using mixed-integer programs

Biosorption of Manganese Ions (II) by Immobilized Biomass on a Mixture of Silica Gel and Zeolite

This study is the absorption capacity of immobilized S. cerevisiae biomass on silica gel mixture and zeolite in the manganese (II) ion in solution. with used was interaction using batch technique of immobilized biomass weight on silica gel and zeolite with solution of manganese ion (II) at concentration of manganese solution, pH and certain contact time. Manganese (II) concentrations before and after interaction were measured by a viscous spectic genome spectrometer using a formaldoxime complex at a maximum wavelength. The result showed that the weight of immobilized S. cerevisiae biomass on silica gel and zeolite influenced the absorption of Mn (II) in solution, the optimum absorption occurred on the use of 75 mg of immobilized biomass. The absorption of manganese (II) by immobilized biomass on silica gel and zeolite is not affected by contact time from the first 5 minutes to 75 minutes of contact time. The initial pH of the solution affects the absorption of manganese (II) by immobilized biomass, the higher the initial pH of the more absorbed manganese (II) solution, the Mn (II) absorption is relatively stable after pH 7. Initial concentration of manganese (II) II), optimum uptake occurs at concentrations of 50 mg / L, with a maximum absorption capacity of 10.989 mg or 2.0 x 10-4 mol of Mn (II) / g of immobilized S. cerevisiae biomass. The binding energy between S. cerevisiae biomass immobilized with manganese (II) is -30.69 kJ / mol

Sea Dump; Multi Function Waste Supply Tool Design to Reduce Belawan Sea Pollution

Belawan Sea are a very dense water area with industrial activities, shipping and human activities. Damage to marine ecosystems continues to increase as the amount of marine waste increases. It is estimated that around 80% of the waste in the sea comes from human activities on land and the remaining 20% comes from activities in the sea. The presence of plastic waste as solid waste is very dominant, with almost 60-80% of the total marine waste. Other marine waste which is a serious concern is oil and heavy metal waste originating from industrial activities. Belawan sea as an international standard port area are flanked by the mouth of the Belawan River and Deli River and receive domestic and non-domestic industrial waste from the river flow. Therefore, to overcome the problem of sea pollution, we designed Sea-Dump. This tool with the principle of desludging is multi-functional because it can carry out screening operations for solid waste such as plastic waste and absorb the liquid waste such as lead (Pb) and oil at once. Sea-Dump is applicable, effective and economical because it can be installed independently on fishing boats. Thus, the condition of the Belawan marine environment becomes conducive and beneficial for marine biota, fishermen, and surrounding communities