While outcomes for children with T-cell acute lymphoblastic leukemia have improved dramatically, survival rates for patients with relapsed/refractory disease remain dismal. Prior studies indicate that glucocorticoid resistance is more common than resistance to other chemotherapies at relapse. In addition, failure to clear peripheral blasts during a prednisone prophase correlates with an elevated risk of relapse in newly diagnosed patients. Here we show that intrinsic GC resistance is present at diagnosis in early thymic precursor T-ALLs as well as in a subset (...) of non-ETP T-ALLs. GC-resistant non-ETP T-ALLs are characterized by strong induction of JAK/STAT signaling in response to interleukin-7 stimulation. Removing IL7 or inhibiting JAK/STAT signaling sensitizes these T-ALLs, and a subset of ETP T-ALLs, to GCs. The combination of the GC dexamethasone and the JAK1/2 inhibitor ruxolitinib altered the balance between pro- and anti-apoptotic factors in samples with IL7-dependent GC resistance, but not in samples with IL7-independent GC resistance. Together, these data suggest that the addition of ruxolitinib or other inhibitors of IL7 receptor/JAK/STAT signaling may enhance the efficacy of GCs in a biologically defined subset of T-ALL.Leukemia advance online publication, 30 May 2017; doi:10.1038/leu.2017.136. (shrink)

BackgroundIn the Canadian Alliance for Healthy Hearts and Minds (CAHHM) cohort, participants underwent magnetic resonance imaging (MRI) of the brain, heart, and abdomen, that generated incidental findings (IFs). The approach to managing these unexpected results remain a complex issue. Our objectives were to describe the CAHHM policy for the management of IFs, to understand the impact of disclosing IFs to healthy research participants, and to reflect on the ethical obligations of researchers in future MRI studies.MethodsBetween 2013 and 2019, 8252 participants (...) (mean age 58 ± 9 years, 54% women) were recruited with a follow-up questionnaire administered to 909 participants (40% response rate) at 1-year. The CAHHM policy followed a restricted approach, whereby routine feedback on IFs was not provided. Only IFs of severe structural abnormalities were reported.ResultsSevere structural abnormalities occurred in 8.3% (95% confidence interval 7.7–8.9%) of participants, with the highest proportions found in the brain (4.2%) and abdomen (3.1%). The majority of participants (97%) informed of an IF reported no change in quality of life, with 3% of participants reporting that the knowledge of an IF negatively impacted their quality of life. Furthermore, 50% reported increased stress in learning about an IF, and in 95%, the discovery of an IF did not adversely impact his/her life insurance policy. Most participants (90%) would enrol in the study again and perceived the MRI scan to be beneficial, regardless of whether they were informed of IFs. While the implications of a restricted approach to IF management was perceived to be mostly positive, a degree of diagnostic misconception was present amongst participants, indicating the importance of a more thorough consent process to support participant autonomy.ConclusionThe management of IFs from research MRI scans remain a challenging issue, as participants may experience stress and a reduced quality of life when IFs are disclosed. The restricted approach to IF management in CAHHM demonstrated a fair fulfillment of the overarching ethical principles of respect for autonomy, concern for wellbeing, and justice. The approach outlined in the CAHHM policy may serve as a framework for future research studies.Clinical trial registrationhttps://clinicaltrials.gov/ct2/show/nct02220582. (shrink)

The objectives of this study were to develop a high-density chromosome bin map of homoeologous group 7 in hexaploid wheat, to identify gene distribution in these chromosomes, and to perform comparative studies of wheat with rice and barley. We mapped 2148 loci from 919 EST clones onto group 7 chromosomes of wheat. In the majority of cases the numbers of loci were significantly lower in the centromeric regions and tended to increase in the distal regions. The level of duplicated loci (...) in this group was 24% with most of these loci being localized toward the distal regions. One hundred nineteen EST probes that hybridized to three fragments and mapped to the three group 7 chromosomes were designated landmark probes and were used to construct a consensus homoeologous group 7 map. An additional 49 probes that mapped to 7AS, 7DS, and the ancestral translocated segment involving 7BS also were designated landmarks. Landmark probe orders and comparative maps of wheat, rice, and barley were produced on the basis of corresponding rice BAC/PAC and genetic markers that mapped on chromosomes 6 and 8 of rice. Identification of landmark ESTs and development of consensus maps may provide a framework of conserved coding regions predating the evolution of wheat genomes. (shrink)

Cognitive science is currently a rapidly expanding area of research. Much is being written on it, but this collection is notable for its contributors who are extremely eminent and distinguished in the subject . The collection is well-balanced, since it includes the work of both philosophers and scientists . It will therefore appeal to all academics interested in the subject, irrespective of whether they have approached the subject from a philosophical or from a scientific point of view.

This study investigates the ability of individuals with psychopathy to perform passive avoidance learning and whether this ability is modulated by level of reinforcement/punishment. Nineteen psychopathic and 21 comparison individuals, as defined by the Hare Psychopathy Checklist Revised (Hare, 1991), were given a passive avoidance task with a graded reinforcement schedule. Response to each rewarding number gained a point reward specific to that number (i.e., 1, 700, 1400 or 2000 points). Response to each punishing number lost a point punishment specific (...) to that number (i.e., the loss of 1, 700, 1400 or 2000 points). In line with predictions, individuals with psychopathy made more passive avoidance errors than the comparison individuals. In addition, while the performance of both groups was modulated by level of reward, only the performance of the comparison population was modulated by level of punishment. The results are interpreted with reference to a computational account of the emotional learning impairment in individuals with psychopathy. (shrink)

To localize wheat ESTs on chromosomes, 882 homoeologous group 6-specific ESTs were identified by physically mapping 7965 singletons from 37 cDNA libraries on 146 chromosome, arm, and sub-arm aneuploid and deletion stocks. The 882 ESTs were physically mapped to 25 regions flanked by 23 deletion breakpoints. Of the 5154 restriction fragments detected by 882 ESTs, 2043 were localized to group 6 chromosomes and 806 were mapped on other chromosome groups. The number of loci mapped was greatest on chromosome 6B and (...) least on 6D. The 264 ESTs that detected orthologous loci on all three homoeologs using one restriction enzyme were used to construct a consensus physical map. The physical distribution of ESTs was uneven on chromosomes with a tendency toward higher densities in the distal halves of chromosome arms. About 43% of the wheat group 6 ESTs identified rice homologs upon comparisons of genome sequences. Fifty-eight percent of these ESTs were present on rice chromosome 2 and the remaining were on other rice chromosomes. Even within the group 6 bins, rice chromosomal blocks identified by 1-6 wheat ESTs were homologous to up to 11 rice chromosomes. These rice-block contigs were used to resolve the order of wheat ESTs within each bin. (shrink)

A total of 1918 loci, detected by the hybridization of 938 expressed sequence tag unigenes from 26 Triticeae cDNA libraries, were mapped to wheat homoeologous group 4 chromosomes using a set of deletion, ditelosomic, and nulli-tetrasomic lines. The 1918 EST loci were not distributed uniformly among the three group 4 chromosomes; 41, 28, and 31% mapped to chromosomes 4A, 4B, and 4D, respectively. This pattern is in contrast to the cumulative results of EST mapping in all homoeologous groups, as reported (...) elsewhere, that found the highest proportion of loci mapped to the B genome. Sixty-five percent of these 1918 loci mapped to the long arms of homoeologous group 4 chromosomes, while 35% mapped to the short arms. The distal regions of chromosome arms showed higher numbers of loci than the proximal regions, with the exception of 4DL. This study confirmed the complex structure of chromosome 4A that contains two reciprocal translocations and two inversions, previously identified. An additional inversion in the centromeric region of 4A was revealed. A consensus map for homoeologous group 4 was developed from 119 ESTs unique to group 4. Forty-nine percent of these ESTs were found to be homoologous to sequences on rice chromosome 3, 12% had matches with sequences on other rice chromosomes, and 39% had no matches with rice sequences at all. Limited homology was found between wheat ESTs on homoeologous group 4 and the Arabidopsis genome. Forty-two percent of the homoeologous group 4 ESTs could be classified into functional categories on the basis of blastX searches against all protein databases. (shrink)

A total of 944 expressed sequence tags generated 2212 EST loci mapped to homoeologous group 1 chromosomes in hexaploid wheat. EST deletion maps and the consensus map of group 1 chromosomes were constructed to show EST distribution. EST loci were unevenly distributed among chromosomes 1A, 1B, and ID with 660, 826, and 726, respectively. The number of EST loci was greater on the long arms than on the short arms for all three chromosomes. The distribution of ESTs along chromosome arms (...) was nonrandom with EST clusters occurring in the distal regions of short arms and middle regions of long arms. Duplications of group 1 ESTs in other homoeologous groups occurred at a rate of 35.5%. Seventy-five percent of wheat chromosome 1 ESTs had significant matches with rice sequences, where large regions of conservation occurred between wheat consensus chromosome 1 and rice chromosome 5 and between the proximal portion of the long arm of wheat consensus chromosome 1 and rice chromosome 10. Only 9.5% of group 1 ESTs showed significant matches to Arabidopsis genome sequences. The results presented are useful for gene mapping and evolutionary and comparative genomics of grasses. (shrink)

The focus of this study was to analyze the content, distribution, and comparative genome relationships of 996 chromosome bin-mapped expressed sequence tags accounting for 2266 restriction fragments on the homoeologous group 3 chromosomes of hexaploid wheat. Of these loci, 634, 884, and 748 were mapped on chromosomes 3A, 3B, and 3D, respectively. The individual chromosome bin maps revealed bins with a high density of mapped ESTs in the distal region and bins of low density in the proximal region of the (...) chromosome arms, with the exception of 3DS and 3DL. These distributions were more localized on the higher-resolution group 3 consensus map with intermediate regions of high-mapped-EST density on both chromosome arms. Gene ontology classification of mapped ESTs was not significantly different for homoeologous group 3 chromosomes compared to the other groups. A combined analysis of the individual bin maps using 537 of the mapped ESTs revealed rearrangements between the group 3 chromosomes. Approximately 232 of the consensus mapped ESTs matched sequences on rice chromosome 1 and revealed large- and small-scale differences in gene order. Of the group 3 mapped EST unigenes ∼21 and 32% matched the Arabidopsis coding regions and proteins, respectively, but no chromosome-level gene order conservation was detected. (shrink)

The notion of form is "the most important notion within the Critique of Aesthetic Judgment". The sensible form involved in aesthetic judgment stands in no clear relation to the formal elements of the Transcendental Aesthetic and Logic—neither to the a priori forms of space and time, nor to the categories. It is held to be the same "kind of form" as the intuitable, "empirical form" mentioned infrequently in the Pure Reason. The author attempts to establish only "what Kant meant" as (...) distinct from its "truth." He lays a bold preparation for "the suggestion... that aesthetic experience is a window, so to speak, into the noumenal world". In Ch. I he accepts a widely-held view that Kant is the discoverer of "philosophical aesthetics" or "the autonomy of the aesthetic realm." His concern is not with this historical question. Nonetheless it may be said that he is not sufficiently aware that the autonomy found in Kant is not in understanding aesthetics as a realm of art, but only in understanding aesthetic judgment in its concern with both art and nature. Accordingly the aesthetic form of objects of art and objects of nature is treated without differentiation. The author is little concerned with form in its relation to natural purposiveness, or with the relation of form in the Aesthetic Judgment to form in the Teleological Judgment. Since nature, at least in certain contexts, supplies a kind of norm for art—a "traditional" element in Kant—the author’s exposition of the manner in which art imitates nature is not entirely satisfactory. In Ch. II, the central issue is whether "individual colors and tones are more than mere sensations". If however each may be understood as "a play of sensations" they can be said to possess a "form" and may enter into aesthetic judgments. The assumption here is that only if the parts of a beautiful thing, e.g., the individual colors of a painting, are beautiful, "can the painting as a whole be a beautiful thing". But this atomistic view of the aesthetic part is subsequently modified. In Ch. III, the imagination is said to "function without the categories" in the synthesis of aesthetic forms. The author must then oppose the view of Kemp Smith and others "that there can be no cognitive awareness or consciousness apart from the categories". He relies especially on the "judgments of perception" of the Prolegomena which "require no pure concept of the understanding". The possibility is not considered that although the imagination may indeed function "autonomously"—without the categories—in the synthesis of aesthetic form, that same synthesis may presuppose a synthesis employing the categories, especially in certain types of aesthetic experience. Some valuable clarifications are achieved of the difficult notions of "play," the harmony of form and cognitive faculties, and the universality of aesthetic judgments. The thesis of Ch. IV is that the object of experience, or the phenomenal object, is not a second object, distinct from the thing-in-itself, but an appearance of the thing-in-itself. Ch. V is devoted to Kant’s theory of art and especially to genius as the productive faculty of aesthetic ideas. The harmony of the faculties of imagination and understanding required of the artistic genius is held to be the same as the harmony which "the work of art itself... arouses in the perceiver of that work of art", but is spontaneous and original in the former case. What would be required of the productive agency in the case of natural objects of aesthetic experience lies outside the range of subject matter chosen. Kant’s view, although not entirely lucid, is that "the standard of fine art must be sought in the supersensible substrate of the artist’s faculties and that the production of the accord of the faculties of understanding and imagination ‘is the ultimate end set by the intelligible basis of our nature'". This prepares the conclusion that "the artist, as creative genius, is he who not only produces but expresses in sensible products, forms which are windows into the supersensible substrate of being". The monograph effectively raises this possibility as a central issue in the discussion of Kant’s aesthetics.—R. K. (shrink)

The complex hexaploid wheat genome offers many challenges for genomics research. Expressed sequence tags facilitate the analysis of gene-coding regions and provide a rich source of molecular markers for mapping and comparison with model organisms. The objectives of this study were to construct a high-density EST chromosome bin map of wheat homoeologous group 2 chromosomes to determine the distribution of ESTs, construct a consensus map of group 2 ESTs, investigate synteny, examine patterns of duplication, and assess the colinearity with rice (...) of ESTs assigned to the group 2 consensus bin map. A total of 2600 loci generated from 1110 ESTs were mapped to group 2 chromosomes by Southern hybridization onto wheat aneuploid chromosome and deletion stocks. A consensus map was constructed of 552 ESTs mapping to more than one group 2 chromosome. Regions of high gene density in distal bins and low gene density in proximal bins were found. Two interstitial gene-rich islands flanked by relatively gene-poor regions on both the short and long arms and having good synteny with rice were discovered. The map locations of two ESTs indicated the possible presence of a small pericentric inversion on chromosome 2B. Wheat chromosome group 2 was shown to share syntenous blocks with rice chromosomes 4 and 7. (shrink)

© 2016 Regents of the University of California.The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,062 new measurements from 721 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. All the particle properties and search limits are listed in Summary Tables. We also give numerous (...) tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 117 reviews are many that are new or heavily revised, including those on Pentaquarks and Inflation. The complete Review is published online in a journal and on the website of the Particle Data Group. The printed PDG Book contains the Summary Tables and all review articles but no longer includes the detailed tables from the Particle Listings. A Booklet with the Summary Tables and abbreviated versions of some of the review articles is also available. (shrink)

IntroductionExperimental research on animals has been guided by principles of the three Rs: reduction, refinement and replacement.1 Recently the fourth R—rehabilitation—has also been incorporated to enhance the welfare of animals that are used in research. With growing scientific curiosity and increasing research, animal use has anything but reduced despite the fact that modern technology has brought to fore many alternatives to animal use.2 ,3 There are many arguments for and against animal use. In India, there has been a proposal to (...) ban the use of animals for training and academic purposes, as reported in two major daily newspapers. This has evoked mixed reactions from the scientific community. We conducted this study to assess the awareness, attitudes and practices regarding the use of animals and their alternatives, in medical training and research amongst medical teachers and students.Study designA …. (shrink)

Johnstone, H. W., Jr. Rhetoric and communication in philosophy.--Smith, C. R. and Douglas, D. G. Philosophical principles in the traditional and emerging views of rhetoric.--Wallace, K. R. Bacon's conception of rhetoric.--Thonssen, L. W. Thomas Hobbes's philosophy of speech.--Walter, O. M., Jr. Descartes on reasoning.--Douglas, D. G. Spinoza and the methodology of reflective knowledge in persuasion.--Howell, W. S. John Locke and the new rhetoric.--Doering, J. F. David Hume on oratory.--Douglas, D. G. A neo-Kantian approach to the epistomology of judgment in (...) criticism.--Bevilacqua, V. M. Lord Kames's theory of rhetoric.--Brockriede, W. E. Bentham's philosophy of rhetoric.--Anderson, R. E. Kierkegaard's theory of communication.--Macksoud, S. J. Ludwig Wittgenstein, radical operationism and rhetorical stance.--Stewart, J. J. L. Austin's speech act analysis.--Torrence, D. L. A philosophy of rhetoric from Bertrand Russell.--Clark, A. Martin Buber, dialogue, and the philosophy of rhetoric.--Bennett, W. Kenneth Burke--a philosophy in defense of un-reason.--Dearin, R. D. The philosophical basis of Chaim Perelman's theory of rhetoric. (shrink)

In this chapter we extend earlier work (Vinuesa et al., Nat Commun 11, 2020) on the potential of artificial intelligence (AI) to achieve the 17 Sustainable Development Goals (SDGs) proposed by the United Nations (UN) for the 2030 Agenda. The present contribution focuses on three SDGs related to healthy and sustainable societies, i.e., SDG 3 (on good health), SDG 11 (on sustainable cities), and SDG 13 (on climate action). This chapter extends the previous study within those three goals and goes (...) beyond the 2030 targets. These SDGs are selected because they are closely related to the coronavirus disease 19 (COVID-19) pandemic and also to crises like climate change, which constitute important challenges to our society. (shrink)

The notion of form is "the most important notion within the Critique of Aesthetic Judgment". The sensible form involved in aesthetic judgment stands in no clear relation to the formal elements of the Transcendental Aesthetic and Logic—neither to the a priori forms of space and time, nor to the categories. It is held to be the same "kind of form" as the intuitable, "empirical form" mentioned infrequently in the Pure Reason. The author attempts to establish only "what Kant meant" as (...) distinct from its "truth." He lays a bold preparation for "the suggestion... that aesthetic experience is a window, so to speak, into the noumenal world". In Ch. I he accepts a widely-held view that Kant is the discoverer of "philosophical aesthetics" or "the autonomy of the aesthetic realm." His concern is not with this historical question. Nonetheless it may be said that he is not sufficiently aware that the autonomy found in Kant is not in understanding aesthetics as a realm of art, but only in understanding aesthetic judgment in its concern with both art and nature. Accordingly the aesthetic form of objects of art and objects of nature is treated without differentiation. The author is little concerned with form in its relation to natural purposiveness, or with the relation of form in the Aesthetic Judgment to form in the Teleological Judgment. Since nature, at least in certain contexts, supplies a kind of norm for art—a "traditional" element in Kant—the author’s exposition of the manner in which art imitates nature is not entirely satisfactory. In Ch. II, the central issue is whether "individual colors and tones are more than mere sensations". If however each may be understood as "a play of sensations" they can be said to possess a "form" and may enter into aesthetic judgments. The assumption here is that only if the parts of a beautiful thing, e.g., the individual colors of a painting, are beautiful, "can the painting as a whole be a beautiful thing". But this atomistic view of the aesthetic part is subsequently modified. In Ch. III, the imagination is said to "function without the categories" in the synthesis of aesthetic forms. The author must then oppose the view of Kemp Smith and others "that there can be no cognitive awareness or consciousness apart from the categories". He relies especially on the "judgments of perception" of the Prolegomena which "require no pure concept of the understanding". The possibility is not considered that although the imagination may indeed function "autonomously"—without the categories—in the synthesis of aesthetic form, that same synthesis may presuppose a synthesis employing the categories, especially in certain types of aesthetic experience. Some valuable clarifications are achieved of the difficult notions of "play," the harmony of form and cognitive faculties, and the universality of aesthetic judgments. The thesis of Ch. IV is that the object of experience, or the phenomenal object, is not a second object, distinct from the thing-in-itself, but an appearance of the thing-in-itself. Ch. V is devoted to Kant’s theory of art and especially to genius as the productive faculty of aesthetic ideas. The harmony of the faculties of imagination and understanding required of the artistic genius is held to be the same as the harmony which "the work of art itself... arouses in the perceiver of that work of art", but is spontaneous and original in the former case. What would be required of the productive agency in the case of natural objects of aesthetic experience lies outside the range of subject matter chosen. Kant’s view, although not entirely lucid, is that "the standard of fine art must be sought in the supersensible substrate of the artist’s faculties and that the production of the accord of the faculties of understanding and imagination ‘is the ultimate end set by the intelligible basis of our nature'". This prepares the conclusion that "the artist, as creative genius, is he who not only produces but expresses in sensible products, forms which are windows into the supersensible substrate of being". The monograph effectively raises this possibility as a central issue in the discussion of Kant’s aesthetics.—R. K. (shrink)

This report describes the rationale, approaches, organization, and resource development leading to a large-scale deletion bin map of the hexaploid wheat genome. Accompanying reports in this issue detail results from chromosome bin-mapping of expressed sequence tags representing genes onto the seven homoeologous chromosome groups and a global analysis of the entire mapped wheat EST data set. Among the resources developed were the first extensive public wheat EST collection. Described are protocols for sequencing, sequence processing, EST nomenclature, and the assembly of (...) ESTs into contigs. These contigs plus singletons were used for selection of distinct sequence motif unigenes. Selected ESTs were rearrayed, validated by 5′ and 3′ sequencing, and amplified for probing a series of wheat aneuploid and deletion stocks. Images and data for all Southern hybridizations were deposited in databases and were used by the coordinators for each of the seven homoeologous chromosome groups to validate the mapping results. Results from this project have established the foundation for future developments in wheat genomics. (shrink)

In the case of magnetic resonance imaging (MRI) imaging, image processing is crucial. In the medical industry, MRI images are commonly used to analyze and diagnose tumor growth in the body. A number of successful brain tumor identification and classification procedures have been developed by various experts. Existing approaches face a number of obstacles, including detection time, accuracy, and tumor size. Early detection of brain tumors improves options for treatment and patient survival rates. Manually segmenting brain tumors from a significant (...) number of MRI data for brain tumor diagnosis is a tough and time-consuming task. Automatic image segmentation of brain tumors is required. The objective of this study is to evaluate the degree of accuracy and simplify the medical picture segmentation procedure used to identify the type of brain tumor from MRI results. Additionally, this work suggests a novel method for identifying brain malignancies utilizing the Bagging Ensemble with K-Nearest Neighbor (BKNN) in order to raise the KNN’s accuracy and quality rate. For image segmentation, a U-Net architecture is utilized first, followed by a bagging-based k-NN prediction algorithm for classification. The goal of employing U-Net is to improve the accuracy and uniformity of parameter distribution in the layers. Each decision tree is fitted on a little different training dataset during classification, and the bagged decision trees are effective since each tree has minor differences and generates slightly different skilled predictions. The overall classification accuracy was up to 97.7 percent, confirming the efficiency of the suggested strategy for distinguishing normal and pathological tissues from brain MR images; this is greater than the methods that are already in use. (shrink)

Mathematical modeling is a convenient way for characterization of complex ecosystems. This approach was applied to study the dynamics of zooplankton in Lake Sevan (Armenia) at different stages of anthropogenic eutrophication with the use of a novel method called discrete modeling of dynamical systems with feedback (DMDS). Simulation demonstrated that the application of this method helps in characterization of inter- and intra-component relationships in a natural ecosystem. This method describes all possible pairwise inter-component relationships like “plus–plus,” “minus–minus,” “plus–minus,” “plus–zero,” “minus–zero,” (...) and “zero–zero” that occur in most ecosystems. Based on the results, a working hypothesis was formulated. It was found that the sensitivity to weak external influence in zooplanktons was the greatest during the mid period of eutrophication in Lake Sevan, whereas in the final stages of eutrophication, an outbreak in the biomass production of cyanobacteria was evident. To support this approach, a weak external disturbance in the form of magnetic storm was used to see its effect on species Daphnia longispina sevanica. A statistically significant correlation between the frequency of magnetic storms and the number of this species was revealed and an increase in the number of toxic cyanobacteria species as a consequence of eutrophication. This paper, for the first time, suggests a DMDS method, to diagnose impact of anthropogenic eutrophication on environment. (shrink)

The state-of-art research in the field of life’s organization confronts the need to investigate a number of interacting components, their properties and conditions of sustainable behaviour within a natural system. In biology, ecology and life sciences, the performance of such stable system is usually related to homeostasis, a property of the system to actively regulate its state within a certain allowable limits. In our previous work, we proposed a deterministic model for systems’ homeostasis. The model was based on dynamical system’s (...) theory and pairwise relationships of competition, amensalism and antagonism taken from theoretical biology and ecology. However, the present paper proposes a different dimension to our previous results based on the same model. In this paper, we introduce the influence of inter-component relationships in a system, wherein the impact is characterized by direction (neutral, positive, or negative) as well as its (absolute) value, or strength. This makes the model stochastic which, in our opinion, is more consistent with real-world elements affected by various random factors. The case study includes two examples from areas of hydrobiology and medicine. The models acquired for these cases enabled us to propose a convincing explanation for corresponding phenomena identified by different types of natural systems. (shrink)