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In the Minimum Description Length (MDL) principle, learning from the data is equivalent to an optimal coding problem. We show that the codes that achieve optimal compression in MDL are critical in a very precise sense. First, when they are taken as generative models of samples, they generate samples with broad empirical distributions and with a high value of the relevance, defined as the entropy of the empirical frequencies. These results are derived for different statistical models (Dirichlet model, independent and pairwise dependent spin models, and restricted Boltzmann machines). Second, MDL codes sit precisely at a second order phase transition point where the symmetry between the sampled outcomes is spontaneously broken. The order parameter controlling the phase transition is the coding cost of the samples. The phase transition is a manifestation of the optimality of MDL codes, and it arises because codes that achieve a higher compression do not exist. These results suggest a clear interpretation of the widespread occurrence of statistical criticality as a characterization of samples which are maximally informative on the underlying generative process.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7512318 | PMC |
http://dx.doi.org/10.3390/e20100755 | DOI Listing |
Cryo Letters
March 2025
Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran.
Background: The polycystic ovary syndrome (PCOS) is a substantial obstacle to female fertility due to ovulation inhibition. Oocyte cryopreservation is crucial for preserving fertility in women with fertility-compromising disorders such as PCOS.
Objective: In this study, the ultrastructural damages of oocytes were evaluated following freezing from PCOS mouse model.
Cryo Letters
March 2025
NITE International Patent Organism Depositary (IPOD) 2-5-8, Kazusakamatari, Kisarazu-shi, Chiba, 292-0818, Japan.
Background: The impacts of suboptimal shipping conditions during transport on cell viability, recovery, and function of cryopreserved samples, have not been well studied.
Objective: The impacts of suboptimal shipping on viability and recovery after the freezing and thawing were investigated using nine cancer cell lines, with particular reference to the approximate level of exposure temperature and exposure time at which adverse effects occur, and whether there are differences in sensitivity between cell types.
Materials And Methods: The adverse effects of any set of suboptimal shipping conditions (-80 degree C for 7 d, -65 degree C or -50 degree C for 1, 3, and 7 d) on nine cancer cell lines (CHO-K1, COS-1, HeLa, HepG2, HL-60, Jurkat, MCF7, MDCK, 293T) were compared with data obtained during storage in liquid nitrogen.
Background: The field of sperm cryopreservation requires the search for and development of new effective cryopreservatives with low toxicity.
Objective: The purpose of this study was to evaluate the characteristics of bull spermatozoa subjected to freezing and storage at -80 degree C for 28 days in a diluent with the addition of Hericium erinaceus polysaccharides.
Materials And Methods: The sperm was frozen under the protection of a complex cryoprotectant and stored in an electric freezer at -80 degree C for 28 days.
Cryo Letters
March 2025
Department of Refrigeration and Cryogenics Engineering, Hefei University of Technology, Hefei, China.
Background: Airflow drying of mammalian cells has not been successful yet, with one obstacle being the improper drying time of cells-laden trehalose droplets.
Objective: To evaluate the major factors affecting the drying kinetics of aqueous trehalose droplets.
Materials And Methods: A numerical analysis was applied to the evaporation behavior of aqueous trehalose droplets for the preservation of biomaterials.
Cryo Letters
March 2025
Division of Plant Genetic Resources, ICAR- Indian Agricultural Research Institute, Pusa Campus, New Delhi-110012, India.
Background: Allium ramosum is an important member of the genus Allium, which is commonly known as Chinese chive or fragrant-flowered garlic. Conserving the genetic diversity of different species of Allium is crucial, and cryopreservation has emerged as an important strategy for long-term conservation of alliums.
Objective: To develop a reliable protocol for the cryoconservation of A.
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