Horizontal Interaction Research Articles

CP violation in the lepton sector

We discuss the dipole electric moment of the electron ( d e) as a test of CP violation. In models where CP violation comes from V - A W ± exchange, d e, like the neutron dipole moment, is very small. In models which incorporate more than one very heavy (∼ M W) Dirac neutrinos, it may be barely observable. But in model a with CP violation induced by a horizontal (family) gauge interaction, d e can be as large as 10 −27 e cm.

Horizontal tectonic interaction of an Archean gneiss belt and greenstones, Pilbara block, Western Australia

The Archean Pilbara block, Western Australia, is cited as a type example of a granite-greenstone terrane. New field evidence reveals that the internal structure of one of the major batholiths, the Shaw batholith, resembles an Archean gneiss belt. Greenstone intercalations within the gneiss belt can be traced into the surrounding greenstone sequence and were incorporated during subhorizontal thrusting and recumbent folding episodes. These early tectonic episodes preceded solid-state diapiric uprise of an overthickened crust. Granitic plutonism and partial melting of the sialic crust appear to have played an important role only in the later stages of the tectonic evolution of the Shaw batholith. Deformation and metamorphism are not a direct consequence of the emplacement of granitic magmas, contrary to the widely accepted magmatic model of batholith formation.

On Lateral Water Mass Interaction—A Case Study, Bristol Bay, Alaska

Abstract Salinity-temperature-depth data obtained on several spring and summer cruises during 1976 and 1977 from outer Bristol Bay in the southeast Bering Sea indicate the existence of a zone, between two well-defined water masses, where details of the interaction process are observable. This interaction zone is approximately 100–150 km wide and is characterized by a plethora of mid-water-column finestructure, in both temperature and salinity, that exhibit a hierarchy of vertical scale sizes. Vertical mixing energy within the zone appears low, which results in persistence of interleaving signatures induced by horizontal interaction of the two adjacent water masses. Such interaction probably occurs between all laterally juxtaposed water masses of nearly the same density; outer Bristol Bay allows enhanced examination of the process because of the broad lateral extent of the transition zone.

Horizontal Interaction and Weak Mixing Angles

The formula tan/sup 2/theta/sub C/ approx. = m/sub d//m/sub s/ is derived from a continuous symmetry. Cabibbo universality is guaranteed in a natural way. All weak mixing angles are determined in terms of quark masses. The b quark is predicted to decay mainly to the u quark, and the lifetime of the associated mesons is approx. 10/sup -10/ - 10/sup -11/ sec. We argue that this additional symmetry is (essentially) the only one which can be added to the standard SU/sub c/(3) x SU(2) x U(1) model without generating anomalies.

THE ORGANIZATION OF A NEW UNIVERSITY

Alternative courses which present themselves when a new university is being planned are to replicate a traditional model, or to explore new ways of promoting scholarship, drawing on the experience of existing universities and their staffs and students, and on perceptions of external needs and pressures for various sorts of learning. The latter course was followed by Griffith University, Brisbane, which opened in 1975. The decision to organize academic activities in non‐departmental schools, each with a unifying theme or problem set orientation, in combination with concern at the cumbersome decision making processes of more traditional forms, led to the design of a relatively decentralized policy making and executive structure: a Council, supported by a range of policy making and advisory committees each with explicit responsibilities and authorities; a limit number of academic and other operating divisions, each headed by an executive officer with substantial delegated authority; and a structure for an emphasis on horizontal interaction.

Physical-Adsorption Isotherm Based on a Triangular-Site Model

A multilayer physical-adsorption-isotherm theory is developed; it assumes that a gas atom cannot be physically adsorbed in an upper layer unless there is a triangular array of three adsorbed atoms in the layer below forming a site for adsorption. Neighbor interactions via Lennard-Jones intermolecular potentials are included in the calculation of the adsorption energy. The resultant isotherm is linear for low coverages, indicates a horizontal interaction correction to the Langmuir adsorption isotherm when there is only first-layer coverage, and may yield a series of steps for sufficiently low temperature. Numerical adsorption isotherms for He on glass at 4.28° and 77°K are presented. The former isotherm exhibits distinctive steps when each layer is condensed, whereas the latter isotherm is quite smooth.

Vertical interaction in the pre‐school

In our deep concern for each individual's best growth and development, we, in the pre-school, consider age and maturity, and watch over the stages of social growth. We strive to help Mary and Pete become integrated within the classroom group. We guide adjustment to room, teacher and group as a whole, and watch over social contacts as they mature from two and three year old solitary and parallel play to successful give and take relationships with one or two other children, and then on to the four year old type of satisfying play and work with four, five, six, or more, others. We seek to establish positive horizontal interaction. Horizontal interaction refers to interaction with one's