Technical Bulletins: Small Grants Available from U.S. Fire Administration for Arson Investigation

This Technical Bulletin describes efforts by the U.S. Fire Administration to help cities combat arson

County Subdivision Control: Model Ordinance with Discussion

The purpose of this manual is to impress upon the reader the urgent need for sound planning and to show what tools are available to facilitate the job of planning and (2) to provide a rough framework, a model subdivision ordinance, around which a county can build a subdivision ordinance tailored to its particular needs and circumstances. It must be emphasized that the values appearing in this manual are only typical minimal values. The model ordinance is quite general—any county wishing to adopt this ordinance would be obliged to initiate a study to determine to what extent the model ordinance suited the prevalent conditions and what changes would have to be made in the ordinance to accommodate these conditions

Technical Bulletins: NLC Program to Help Cities with Airport Noise Problems

Announcement of the National League of Cities program Each Community Helps Others (ECHO), which was designed to provide technical assistance to communities which have problems with airport noise

The media in support of the American political structure and its institutions as evidenced by newspaper editorial coverage of the Iran-Contra affair

Knocking the media in this country has become something of a “national pastime.” Whatever the problem, it is never difficult to find someone who is willing to blame the media for complacency if not responsibility

Technical Bulletins: Bidding and Evaluating Dental Insurance

This Technical Bulletin provides a brief summary of the types of dental insurance available and, with a small amount of additional information and assistance, can be used as a guide in bidding and evaluating such coverage

Heavy metal analysis of stream sediments in the James River Basin, Missouri

A reconnaissance survey of stream sediments using the minus 80 mesh sieve fraction was made at 53 sites throughout the James River basin, Missouri. Sample sites within the 1460 square miles of the basin were chosen at tributary confluences, suspected contamination sources, and known areas of mineralization. Replicates and stream profiles were taken to check for analytical variation and reproducibility of results. Sediment samples were prepared by a hot nitric acid leach method. The sediments were analyzed using an atomic absorption unit to determine Cu, Pb, Zn, and Cd trace metal contents. Values of selected streams within the basin were statistically evaluated using Student\u27s t-test and analysis of variance methods to examine variations in metal content of stream sediments. The results were compared with direct observations of the stream populations and found compatible. High metal values in the fine fraction of the stream sediments were found all along the flow of Wilson Creek, and near mineralized areas on Pearson Creek, Finley Creek, and Flat Creek. Lead ranged from 10 ppm to 570 ppm. Zinc ranged from 5 ppm to 610 ppm. Copper ranged from 0 to 98 ppm. Cadmium ranged from 0 to 62 ppm. Average values for Wilson Creek were found to be much higher than average values for the rest of the river basin --Abstract, page 1

Technical Bulletins: Revenue Sharing Extended Three Years; RS Handicapped Regulations Become Final

This Technical Bulletin discusses key features of the Local Government Fiscal Assistance Amendments of 1983

Generalized Unitary Coupled Cluster Wavefunctions for Quantum Computation

We introduce a unitary coupled-cluster (UCC) ansatz termed $k$-UpCCGSD that is based on a family of sparse generalized doubles (D) operators which provides an affordable and systematically improvable unitary coupled-cluster wavefunction suitable for implementation on a near-term quantum computer. $k$-UpCCGSD employs $k$ products of the exponential of pair coupled-cluster double excitation operators (pCCD), together with generalized single (S) excitation operators. We compare its performance in both efficiency of implementation and accuracy with that of the generalized UCC ansatz employing the full generalized SD excitation operators (UCCGSD), as well as with the standard ansatz employing only SD excitations (UCCSD). $k$-UpCCGSD is found to show the best scaling for quantum computing applications, requiring a circuit depth of $\mathcal O(kN)$, compared with $\mathcal O(N^3)$ for UCCGSD and $\mathcal O((N-\eta)^2 \eta)$ for UCCSD where $N$ is the number of spin orbitals and $\eta$ is the number of electrons. We analyzed the accuracy of these three ans\"atze by making classical benchmark calculations on the ground state and the first excited state of H$_4$ (STO-3G, 6-31G), H$_2$O (STO-3G), and N$_2$ (STO-3G), making additional comparisons to conventional coupled cluster methods. The results for ground states show that $k$-UpCCGSD offers a good tradeoff between accuracy and cost, achieving chemical accuracy for lower cost of implementation on quantum computers than both UCCGSD and UCCSD. Excited states are calculated with an orthogonally constrained variational quantum eigensolver approach. This is seen to generally yield less accurate energies than for the corresponding ground states. We demonstrate that using a specialized multi-determinantal reference state constructed from classical linear response calculations allows these excited state energetics to be improved