Pattern recognition and associative memory as dynamical processes in a synergetic system

We first present numerical results for the decomposition procedure for complex scenes described in Part I of these papers. Part II then mainly deals with a formalism that allows a formulation of our approach to pattern recognition and associative memory that is simultaneously invariant against translation, rotation, and scaling, Part II thus contains an explicit elaboration of ideas of Part I.     

On the Physiology of Rhizopus Species

Part. V. The preliminary research on the occurrence of zymase and carboxylase in Rhizopus species.

Part. VI. The verification of the occurrence of zymase in Rhizopus species.

Part. VII. On the formation of ethyl alcohol from acetic acid by acetone-Rhizopus (Rhizopus treated by acetone.)

Part. VIII. On the formation of ethyl alcohol from malic acid by Rhizopus species.

Part. IX. On the formation of ethyl alcohol from malic acid by ace’one-Rhizopus.     

Glucose catabolism during aging and differentiation in hypocotyls ofPhaseolus mungo seedlings

Changes in activities of the glycolytic and pentose phosphate (PP) pathways in glucose catabolism in various parts of the hypocotyls obtained from 4-day-old etiolatedPhaseolus mungo seedlings were investigated by measuring the inhibition rates of respiration by iodoacetate and malonate, and the release of¹⁴CO₂ from [1-¹⁴C]- and [6-¹⁴C]glucose. The relative activity of the PP pathway in glucose catabolism was higher in the immature part (Part I) and the aged part (Part V) of the hypocotyls than in the intermediary one (Part III), while the activity of the glycolytic pathway decreased with aging. On a fresh weight basis, the enzyme activities of the glycolytic and PP pathways were higher in Part I than in Parts III and V. On a protein content basis, however, activities of the enzymes of the PP pathway increased with aging and differentiation of the hypocotyls whereas those of the glycolytic pathway decreased. Levels of nicotinamide adenine nucleotides were found to be in the following order: Part I>Part III> Part V for NAD⁺+NADH; Part I>Part V>Part III for NADP⁺+NADPH. The stimulative effect of methylene blue on decreasing the C₆/C₁ ratio was greater in Part III than in Part I, and No effect was observed in Part V. These data suggest that a decrease in the activity of the glycolytic pathway with aging and differentiation may be due to the decreasing glycolytic enzyme activities and NAD(H) content. The higher activity of the PP pathway in the immature part is attributable to larger amounts of NADP(H) and enzymes of the PP pathway. The greater contribution of the PP pathway to glucose catabolism in the aged part than in the intermediary part seems to results from a more active turnover of NADP and the relatively higher activity of the enzymes of the PP pathway than those of the glycolytic pathway.     

An “Ethnic” Arboretum

Part I of this three-part series deals generally with sound and its pollution. Part II will move on to measurement, effects, and indoor learning activities. Outdoor activities and references will make up Part III.     

Inductive Capacities for the Dorsal Mesoderm of the Dorsal Marginal Zone and Pharyngeal Endoderm in the Very Early Gastrula of the Newt,and Presumptive Pharyngeal Endoderm as an Initiator of the Organization Center*

The organization center of Cynops pyrrhogaster was divided into Parts 1, 2 and 3 of equal size (0.3×0.4 mm²) with presumptive fates as pharyngeal, pharyngeal+prechordal+trunk notochord, and trunk-tail notochord, respectively. Movements and changes in size and shape of each part were followed through gastrulation. Differentiation tendencies of each part were examined under three conditions: I, isolated; II, sandwiched with presumptive ectoderm; 111, sandwiched with presumptive ectoderm after preculture in isolation for various times. In I, Parts 2 and 3 differentiated into dorsal mesoderm. In II, each part induced dorsal mesoderm and neural tissues, the frequency being highest in Part 2 and lowest in Part 3. In III, Parts 1 and 2 realized their presumptive fates, through changes in inductive capacities from trunk-tail to head. This change progressed rapidly in Part 1, and slowly in Part 2. Part 3 required induction by neighbouring Part 2 to realize its presumptive fate. Changes of inductive capacity of Parts 1 and 2 respectively, were chronologically similar in normal development and in preculture experiments. Lastly, the primary presumptive pharyngeal zone at blastula was proposed to act as an initiator of the organization center, its programmed information being transmitted to Part 2, and then to Part 3.     

A review of the enforcement regime for vessel‐source oil pollution control

Abstract

The purpose of this article is to identify the currently applicable international law intended to regulate vessel‐source pollution. Part I delineates the elements relevant for this study. Part II discusses the development of a sequence of incremental conventions. Part III examines the significance and weaknesses of the 1973 MARPOL Convention with its 1978 Protocol and of the 1982 UN. Convention on the Law of the Sea. Part IV explores alternative and/or supplementary legal approaches for handling the vessel‐source oil pollution threat.     

Destabilization and stabilization of proteins

In Part I the history of progress in the stabilization and destabilization of protein conformations by means of cosolvents is outlined in terms of distinct conceptual steps. In Part II it is shown that a straightforward application of the Kirkwood-Buff theory of solutions leads to formulas for the preferential interaction and the free energy of unfolding, which confirm and generalize the results of Part I.     

MEDICAL PROGRESS: ISOTOPES IN CLINICAL AND EXPERIMENTAL MEDICINE (Part I)

This is Part I of an article in two parts. Part II, Important Applications of Isotopes in Experimental Medicine, will appear in the August issue.     

Pre-existing fairness concerns restrict the cultural evolution and generalization of inequitable norms in children

Many social exchanges produce benefits that would not exist otherwise, but anticipating conflicts about how to distribute these benefits can derail exchange and destroy the gains. Coordination norms can solve this problem by providing a shared understanding of how to distribute benefits, but such norms can also perpetuate group-level inequality. To examine how inequitable norms evolve culturally and whether they generalize from one setting to another, we conducted an incentivized lab-in-the-field experiment among kindergarten (5–6) and second-grade (8–9) children living in Switzerland (4′228 decisions collected from 326 children). In Part 1, we created two arbitrarily marked groups, triangles and circles. We randomly and repeatedly formed pairs with one triangle and one circle, and players in a pair played a simple bargaining game in which failure to agree destroyed the gains from social exchange. At the beginning of Part 1 we suggested a specific way to play the game. In symmetric treatments, this suggestion did not imply inequality between the groups, while in asymmetric treatments it did. Part 2 of the experiment addressed the generalization of norms. Retaining their group affiliations from Part 1, each child had to distribute resources between an in-group member and an out-group member. Children of both age groups in symmetric treatments used our suggestions about how to play the game to coordinate in Part 1. In asymmetric treatments, children followed our suggestions less consistently, which reduced coordination but moderated inequality. In Part 2, older children did not generalize privilege from Part 1. Rather, they compensated the underprivileged. Younger children neither generalized privilege nor compensated the underprivileged.     

设施黄瓜育成品种果实外观品质的遗传多样性分析

对我国新育成的不同生态类型的138个设施黄瓜品种的19个果实外观性状进行了调查分析,研究其遗传多样性。结果表明,参试品种质量性状的遗传多样性指数都小于数量性状,不同生态类型黄瓜品种果实外观性状的遗传多样性指数为华北型(1.33)>华南型(1.25)>欧洲温室型(1.0)。质量性状的遗传多样性指数为华南型(0.91)>华北型(0.65)>欧洲温室型(0.48);数量性状的遗传多样性指数为华北型(1.94)>华南型(1.56)>欧洲温室型(1.47)。华南型品种果实数量性状的变异系数均高于华北型和欧洲温室型品种。主坐标轴分析(PCO)将所有种质划分为3个区组,即1区为华北型种质优势区、2区为华北型华南型和欧洲温室型种质混合分布区、3区为华南型种质区。PCO结果表明,1区和2区发生了基因渗透。对交流区域中华北型品种自交分离,后代中出现的稀刺瘤和光皮种质的情况进一步验证了基因渗透的结果。参照育成品种的果实性状信息对黄瓜以后的育种工作提出了建议。     

Development of a variational scheme for model inversion of multi-area model of brain. Part II: VBEM method

In Part I and Part II of these two companion papers (henceforth called Part I and Part II), we develop and evaluate a variational Bayesian expectation maximization (VBEM) method for model inversion of our multi-area extended neural mass model (MEN). In this paper, we develop the VBEM method to estimate posterior distributions of parameters of MEN. We choose suitable prior distributions for the model parameters in order to use properties of a conjugate-exponential model in implementing VBEM. Consequently, VBEM leads to analytically tractable forms. The proposed VBEM algorithm starts with initialization and consists of repeated iterations of a variational Bayesian expectation step (VB E-step) and a variational Bayesian maximization step (VB M-step). Posterior distributions of the model parameters are updated in the VB M-step. Distribution of the hidden state is updated in the VB E-step. We develop a variational extended Kalman smoother (VEKS) to infer the distribution of the hidden state in the VB E-step and derive the forward and backward passes of VEKS, analogous to the Kalman smoother. In Part I, we evaluate and validate the VBEM method using simulation studies.     

The behavior of shoot apices of Tulipa in relation to floral induction

This study was carried out in three parts. Part I described the shoot apices of Tulipa as they are affected by temperature treatments which induce flowering. Part II traced the changes in the protein complement of the growing points that occurred concomitantly with floral induction. Part III dealt with several fractions of basic proteins with amino acid compositions that were consistent with their histone character. A general discussion deals with the overall problems of flowering in Tulipa.     

MEDICAL PROGRESS: ISOTOPES IN CLINICAL AND EXPERIMENTAL MEDICINE

This is Part II of an article in two parts. Part I appeared in the July issue of California Medicine, and with it were the list of references for the entire article and the Table 1 referred to in the following text.     

Analysis of genetic data on Jewish populations. I. Historical background, demographic features, and genetic markers.

Part I describes the data sets on which the analysis of Part II is based. This covers the nature of the populations sampled, the extent to which the samples are representative, and a brief review of historical and demographic facts on the populations involved.     

A review of numerical methods in bacterial identification

Part A of this review describes the particular computer-assisted identification service operated by the NCTC. In Part B, the use of probability matrices is examined, discussing various methods of calculating likelihoods and the problems that arise when calculating these from probability matrices. Part C describes the alternative numerical methods of constructing identification keys and the supplementary methods of selecting best sets of characters to aid identification. Finally, in Part D, the prospects and limitations of numerical methods in bacterial identification are assessed, first with regard to methodology used and then in terms of performance and practical limitations.     

There May be Strict Empirical Laws in Biology, after All

This paper consists of four parts. Part 1 is an introduction. Part 2 evaluates arguments for the claim that there are no strict empirical laws in biology. I argue that there are two types of arguments for this claim and they are as follows: (1) Biological properties are multiply realized and they require complex processes. For this reason, it is almost impossible to formulate strict empirical laws in biology. (2) Generalizations in biology hold contingently but laws go beyond describing contingencies, so there cannot be strict laws in biology. I argue that both types of arguments fail. Part 3 considers some examples of biological laws in recent biological research and argues that they exemplify strict laws in biology. Part 4 considers the objection that the examples in part 3 may be strict laws but they are not distinctively biological laws. I argue that given a plausible account of what distinctively biological means, such laws are distinctively biological.     

Book Reviews

Book reviewed in this article:
Archaeological Explorations in Peru. Part IV. Cañete Valley. A. L. K roeber .
Archaeological Explorations in Peru. Part III. Textiles of the Early Nazca Period. L ila M. O'N eale .     

Precluding the Applicability of Section 2 of Part XV of the Law of the Sea Convention

Part XV of the Law of the Sea Convention (LOSC or the Convention) affords priority to section 1 of Part XV over the compulsory procedures entailing binding decisions laid out in section 2. This article examines the jurisprudence that has arisen with respect to Articles 281–283 of section 1 of Part XV. Article 281 allows parties to the Convention by agreement between them to opt out of compulsory and binding dispute resolution. Article 282 is a choice of forum provision that allows parties to prefer binding dispute resolution under the terms of another agreement “or otherwise,” such as by way of optional declarations under the Statute of the International Court. Article 283 requires the parties to a dispute concerning the interpretation or application of the Convention to exchange views regarding the appropriate means of settling that dispute before triggering the compulsory procedures entailing binding decisions of section 2 of Part XV.     

Book Reviews

Book reviewed in this article:
MEXICO, CENTRAL AND SOUTH AMERICA: Excavations at Zacatenco. G eorge C. V aillant.
MEXICO, CENTRAL AND SOUTH AMERICA: Excavations at Ticoman. G eorge C. V aillant. (Same series, Vol. 32, Part 2, 1931.)
MEXICO, CENTRAL AND SOUTH AMERICA: Excavations at Gualupita. S uzannah B. and G eorge C. V aillant. (Same series, Vol. 35, Part 1, 1934.)
MEXICO, CENTRAL AND SOUTH AMERICA: Excavations at El Arbolillo. G eorge C. V aillant. (Same series, Vol. 35, Part 2, 1935.)
MEXICO, CENTRAL AND SOUTH AMERICA: Early Cultures in the Valley of Mexico: Results of the Stratigraphical Project of the American Museum of Natural History in the Valley of Mexico, 1928–1933. G eorge C. V aillant. (Same series, Vol. 35, Part 3, 1935.)     

The theory and practice of psychological medicine in the Ayurvedic tradition

In this paper I attempt to elucidate and render intelligible to a non-Western reader the internal logic and the consistency in both theory and practice of Ayurvedic psychological medicine. In Part 1, I deal with the classical metaphysical base (Sämkya philosophy) on which the Ayurvedic concept of mind rests. I also deal with the theory of psychological medicine as stated in ancient Sanskrit texts. In Part II, I deal with the manner in which the classic theory is implemented in contemporary practice in Sri Lanka, while Part III deals with case studies of two patients taking Ayurvedic therapy.