229 research outputs found
The Permissible Scope of Texas Automobile Inventory Searches in the Aftermath of Colorado v. Bertine: A Talisman is Created
The fourth amendment to the United States Constitution guarantees freedom from unreasonable searches and seizures. The warrant and probable cause requirements advance this constitutionally implied privacy right. However, with respect to automobile searches, strict adherence to these safeguards has been eschewed in favor of more flexible, and arguably less protective, versions of reasonableness.
In 1981, in Gill v. State, the Texas court addressed the permissible scope of inventory searches, holding that the police may not search the locked trunk of an automobile while conducting an inventory search. Despite the simplicity of the Gill rule, a number of recent cases, while not expressly overruling Gill, significantly expanded the scope of inventory permitted by a fair reading of Gill. These cases mean much more than the expansion of inventory scope, though. They mean that any expectation of privacy is meaningless in this context. Were that expectation replaced by another suitable safeguard, the result might have been less alarming, but, when one measure is removed from the balance without a corresponding adjustment, balancing becomes formalistic; the outcome is predetermined.
Texas law should not uncritically follow this development of fourth amendment jurisprudence. No impediment exists, under either a fourth amendment analysis or an interpretation of the Texas Constitution, to reaffirmation of the balancing undertaken in Gill. Noble motivations cannot and should not protect illogic from criticism. Indeed, illogic undermines the persuasiveness of legal precedent while, at the same time, often imperiling fundamental and well-developed safeguards against improper governmental intrusion. If the United States Supreme Court has indulged the government’s desire to facilitate the finding of criminal evidence at the expense of personal liberty, the court of criminal appeals need not follow, nor set, the example
Self-organized critical earthquake model with moving boundary
A globally driven self-organized critical model of earthquakes with
conservative dynamics has been studied. An open but moving boundary condition
has been used so that the origin (epicenter) of every avalanche (earthquake) is
at the center of the boundary. As a result, all avalanches grow in equivalent
conditions and the avalanche size distribution obeys finite size scaling
excellent. Though the recurrence time distribution of the time series of
avalanche sizes obeys well both the scaling forms recently observed in analysis
of the real data of earthquakes, it is found that the scaling function decays
only exponentially in contrast to a generalized gamma distribution observed in
the real data analysis. The non-conservative version of the model shows
periodicity even with open boundary.Comment: 5 pages, 4 figures, accepted version in EPJ
The global picture of self-similar and not self-similar decay in Burgers Turbulence
This paper continue earlier investigations on the decay of Burgers turbulence
in one dimension from Gaussian random initial conditions of the power-law
spectral type . Depending on the power , different
characteristic regions are distinguished. The main focus of this paper is to
delineate the regions in wave-number and time in which self-similarity
can (and cannot) be observed, taking into account small- and large-
cutoffs. The evolution of the spectrum can be inferred using physical arguments
describing the competition between the initial spectrum and the new frequencies
generated by the dynamics. For large wavenumbers, we always have
region, associated to the shocks. When is less than one, the large-scale
part of the spectrum is preserved in time and the global evolution is
self-similar, so that scaling arguments perfectly predict the behavior in time
of the energy and of the integral scale. If is larger than two, the
spectrum tends for long times to a universal scaling form independent of the
initial conditions, with universal behavior at small wavenumbers. In the
interval the leading behaviour is self-similar, independent of and
with universal behavior at small wavenumber. When , the spectrum
has three scaling regions : first, a region at very small \ms1 with
a time-independent constant, second, a region at intermediate
wavenumbers, finally, the usual region. In the remaining interval,
the small- cutoff dominates, and also plays no role. We find also
(numerically) the subleading term in the evolution of the spectrum
in the interval . High-resolution numerical simulations have been
performed confirming both scaling predictions and analytical asymptotic theory.Comment: 14 pages, 19 figure
Aperiodicity in one-way Markov cycles and repeat times of large earthquakes in faults
A common use of Markov Chains is the simulation of the seismic cycle in a
fault, i.e. as a renewal model for the repetition of its characteristic
earthquakes. This representation is consistent with Reid's elastic rebound
theory. Here it is proved that in {\it any} one-way Markov cycle, the
aperiodicity of the corresponding distribution of cycle lengths is always lower
than one. This fact concurs with observations of large earthquakes in faults
all over the world
Prediction of Large Events on a Dynamical Model of a Fault
We present results for long term and intermediate term prediction algorithms
applied to a simple mechanical model of a fault. We use long term prediction
methods based, for example, on the distribution of repeat times between large
events to establish a benchmark for predictability in the model. In comparison,
intermediate term prediction techniques, analogous to the pattern recognition
algorithms CN and M8 introduced and studied by Keilis-Borok et al., are more
effective at predicting coming large events. We consider the implications of
several different quality functions Q which can be used to optimize the
algorithms with respect to features such as space, time, and magnitude windows,
and find that our results are not overly sensitive to variations in these
algorithm parameters. We also study the intrinsic uncertainties associated with
seismicity catalogs of restricted lengths.Comment: 33 pages, plain.tex with special macros include
Optimization of interaction of agrarian entities as an imperative of ensuring food security of the state
The interaction of agricultural entities is based on modern market relations and the state agrarian policy. Managing the subjects of the agricultural sector of the economy is the primary task of the state, since the provision of food security of the state depends on this.
The subject of the study is the establishment of relations of the agricultural sector of the country. In the grouping method, a direct relationship was established between the sum of agricultural production in farms of all categories in the constituent entities of the Russian Federation and the number of employees in the regional agro-industrial complex of the agricultural sector, as well as the number of departments in them.
The purpose and objective of the study is to highlight the main functions of state administration of the agricultural sector at the regional level, to identify the lack of an effective mechanism for interaction of the subjects of the agricultural market with each other and with the regional authorities of the agricultural sector.
The presented model of optimizing the relationships between the agrarian entities of the region will increase the efficiency of the agrarian sector of the region’s economy and ensure its food security.
The necessity of planning and forecasting the volumes of production and use of agricultural products and raw materials is substantiated. The system of such forecasting includes such subsystems as agricultural enterprises, processing enterprises, and the population of the region.
It is concluded that each subsystem works on a well-formed and well-founded functional model, which includes input and output information, controls that regulate functioning, as well as mechanisms that ensure such functioning. A special role in the forecasting process is assigned to the regional management bodies of the agro-industrial sector represented by the department for optimizing the interaction of agricultural entities in the region. The final forecast result should be a balance model of the degree of food security in the region's population
Modulational instability in nonlocal Kerr-type media with random parameters
Modulational instability of continuous waves in nonlocal focusing and
defocusing Kerr media with stochastically varying diffraction (dispersion) and
nonlinearity coefficients is studied both analytically and numerically. It is
shown that nonlocality with the sign-definite Fourier images of the medium
response functions suppresses considerably the growth rate peak and bandwidth
of instability caused by stochasticity. Contrary, nonlocality can enhance
modulational instability growth for a response function with negative-sign
bands.Comment: 6 pages, 12 figures, revTeX, to appear in Phys. Rev.
Formation of an integrated system for monitoring the food security of the region
The agro-industrial complex at the current stage of operation requires a comprehensive analysis of the main directions of agricultural development and its development prospects, assessment of indicators determining the level of accessibility of food products - according to the global food security index, which allowed us to identify the main problems in ensuring the availability of food products. The subject of the study is the formation of an integrated system for monitoring food security in the agro-industrial complex of the region. The paper presents a comparative description of the methodological approaches to assessing the food security of the region. Indicators of the Russian Federation that are not fully synchronized with the main indicators of FAO food security have been identified. The aim and objective of the study is the introduction of progressive methodological approaches to assessing the physical accessibility of food products, which involves assessing the level of development of the distribution infrastructure taking into account the FAO system of food safety indicators, which allows an objective assessment of the volume of domestic production, determine the country's comparative advantages in the production of basic food products, and also evaluate the effectiveness of this production. The identified systemic threats to the food security of the region make it possible to justify the reserves for improving the functioning of the regional agri-food market. The necessity of applying a systematic approach to assessing the level of regional food security, which consists in consolidating the organizational, managerial, financial, economic and regulatory mechanisms for regulating the food security of the region, is substantiated. This will provide an information basis for determining development priorities and guidelines, identifying problems and threats in the food sector, taking into account regional characteristics, increasing the efficiency of forms and methods of food flow movement based on the use of effective management methods, the capabilities of modern information technologies and logistic ties
Detection of negative ions in glow discharge mass spectrometry for analysis of solid specimens
A new method is presented for elemental and molecular analysis of halogen-containing samples by glow discharge time-of-flight mass spectrometry, consisting of detection of negative ions from a pulsed RF glow discharge in argon. Analyte signals are mainly extracted from the afterglow regime of the discharge, where the cross section for electron attachment increases. The formation of negative ions from sputtering of metals and metal oxides is compared with that for positive ions. It is shown that the negative ion signals of F(-) and TaO(2)F(-) are enhanced relative to positive ion signals and can be used to study the distribution of a tantalum fluoride layer within the anodized tantala layer. Further, comparison is made with data obtained using glow-discharge optical emission spectroscopy, where elemental fluorine can only be detected using a neon plasma. The ionization mechanisms responsible for the formation of negative ions in glow discharge time-of-flight mass spectrometry are briefly discussed
Mean first-passage times of non-Markovian random walkers in confinement
The first-passage time (FPT), defined as the time a random walker takes to
reach a target point in a confining domain, is a key quantity in the theory of
stochastic processes. Its importance comes from its crucial role to quantify
the efficiency of processes as varied as diffusion-limited reactions, target
search processes or spreading of diseases. Most methods to determine the FPT
properties in confined domains have been limited to Markovian (memoryless)
processes. However, as soon as the random walker interacts with its
environment, memory effects can not be neglected. Examples of non Markovian
dynamics include single-file diffusion in narrow channels or the motion of a
tracer particle either attached to a polymeric chain or diffusing in simple or
complex fluids such as nematics \cite{turiv2013effect}, dense soft colloids or
viscoelastic solution. Here, we introduce an analytical approach to calculate,
in the limit of a large confining volume, the mean FPT of a Gaussian
non-Markovian random walker to a target point. The non-Markovian features of
the dynamics are encompassed by determining the statistical properties of the
trajectory of the random walker in the future of the first-passage event, which
are shown to govern the FPT kinetics.This analysis is applicable to a broad
range of stochastic processes, possibly correlated at long-times. Our
theoretical predictions are confirmed by numerical simulations for several
examples of non-Markovian processes including the emblematic case of the
Fractional Brownian Motion in one or higher dimensions. These results show, on
the basis of Gaussian processes, the importance of memory effects in
first-passage statistics of non-Markovian random walkers in confinement.Comment: Submitted version. Supplementary Information can be found on the
Nature website :
http://www.nature.com/nature/journal/v534/n7607/full/nature18272.htm
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