Coniferest: A complete active anomaly detection framework

M.V. Kornilov; Korolev V.; Malanchev K.; Lavrukhina A.; Russeil E.; Semenikhin T. A.; Gangler E.; Ishida E. O.; Pruzhinskaya M.; Volnova A. A.; Sreejith S.

doi:10.1016/j.ascom.2025.100960

?

Coniferest: A complete active anomaly detection framework

Astronomy and Computing. 2025. Vol. 52. Article 100960.

M.V. Kornilov, Korolev V., Malanchev K., Lavrukhina A., Russeil E., Semenikhin T. A., Gangler E., Ishida E. O., Pruzhinskaya M., Volnova A. A., Sreejith S.

We present coniferest, an open source generic purpose active anomaly detection framework written in Python. The package design and implemented algorithms are described. Currently, static outlier detection analysis is supported via the Isolation forest algorithm. Moreover, Active Anomaly Discovery (AAD) and Pineforest algorithms are available to tackle active anomaly detection problems. The algorithms and package performance are evaluated on a series of synthetic datasets. We also describe a few success cases which resulted from applying the package to real astronomical data in active anomaly detection tasks within the SNAD project.

Research target: Physics Computer Science

Language: English

Full text

DOI

Keywords: Data analysis in Python Machine learning

Новые информационные технологии в исследовании сложных структур. Материалы шестнадцатой международной конференции 21–25 Сентября 2026 г.

Томск: Издательство Томского государственного университета, 2026.

Материалы сборника Шестнадцатой Международной конференции «Новые информационные технологии в исследовании сложных структур» (Москва, 21–25 сентября 2026 г.) ориентированы на широкий круг специалистов, работающих на стыке теории информации, системного анализа и прикладных предметных областей. В издание вошли результаты исследований, посвящённые моделированию дискретных и стохастических структур управления и связи, разработке высокопроизводительных вычислительных и телекоммуникационных систем, а также вопросам цифровой трансформации образования, архитектурно-градостроительного проектирования, экологического ...

Added: October 6, 2026

Исследование свойств оптического покрытия на основе упрощенного симулятора процесса напыления

Isaev T. F., Шаров А. Н., Журнал вычислительной математики и математической физики 2026 Т. 66 № 1 С. 83–93

Исследуются свойства оптических покрытий на основе использования упрощенного симулятора ошибок в толщинах слоев покрытий при их напылении. Обосновывается возможность такого подхода. Выводятся аналитические оценки среднеквадратичного значения нормы вектора ошибок и степени коррелированности ошибок в толщинах слоев покрытия. Изучается зависимость среднеквадратичного значения нормы вектора ошибок и свойств покрытия от уровня случайных ошибок в слоях. ...

Added: October 5, 2026

Оптимизация энергопотребления предприятия с использованием методов многокритериальной оптимизации

Серебренников Д. А., Belov A. V., Информационные технологии и вычислительные системы 2026 № 3 С. 157–169

В условиях роста стоимости энергоресурсов и необходимости повышения энергоэффективности производственных процессов особую актуальность приобретает задача оптимизации энергопотребления промышленных предприятий. В данной работе рассматривается подход к управлению энергозатратами машиностроительного предприятия на основе методов многокритериальной оптимизации. Постановка задачи включает несколько целевых функций: минимизацию энергопотребления, минимизацию стоимости электроэнергии с учётом тарифных ограничений и максимизацию производственной эффективности. Для решения ...

Added: October 5, 2026

Prospects for an independent measurement of the l = 1, 2, 3 CMB anisotropy multipoles using the anisotropic Sunyaev-Zel’dovich effect

Осипова А. М., Пилипенко С. В., Novikov D. I. et al., Physical Review D - Particles, Fields, Gravitation and Cosmology 2026 Vol. 114 Article 063522

We investigate the prospects for observing a specific spectral distortion of the cosmic microwave background, which occurs due to the anisotropy of the radiation when it is scattered by hot plasma of galaxy clusters. Detection of this anisotropic Sunyaev-Zel’dovich effect would enable an independent measurement of the CMB anisotropy multipoles with l 1⁄4 1, 2, 3, allow the ...

Added: October 5, 2026

Nanometer thick iron garnet films with high Faraday rotation

Gribova N. I., Osmanov S. V., Lyashko S. D. et al., Journal of Magnetism and Magnetic Materials 2025 No. 614 P. 1–8

Here we demonstrate nanometer thick iron garnet films with high specific Faraday rotation suitable for the magneto-optical applications. Bismuth-substituted iron garnet films of compositions Bi1Y2Fe5O12 and Bi1Tm2Fe5O12 deposited on gadolinium gallium garnet substrate are fabricated and characterized. Their thicknesses range from 2 to 10 nm, which corresponds to just a few crystal lattice constants. Spectacularly, Faraday rotation of the ...

Added: October 4, 2026

On Practical Aspects of Constructing Quasi-Cyclic Subfield Subcodes of Dual Elliptic Codes and Their Application in McEliece-type Cryptosystems

Kuninets A., IEEE Transactions on Information Theory 2026 P. 1–1

In this work we study the applicability of Quasi-Cyclic Subfield Subcodes of Dual Elliptic (QC-SSDE) codes for integration into code-based cryptographic schemes. Detailed algorithms are provided for constructing parity-check matrices as well as block-circulant parity-check matrices for this family of codes, accompanied by empirical results that enable the construction of QC-SSDE codes with predetermined dimensions. ...

Added: October 3, 2026

Инкрементальный метод обновления многомерного куба по неупорядоченному потоку событий журналов информационных систем

Zykov S. V., Уфимцев Г. А., Моделирование, оптимизация и информационные технологии 2026 Т. 14 № 8 С. 1–13

Информационные системы формируют большие объёмы событийных журналов, которые используются для анализа работы приложений и сервисов. При этом события могут поступать в аналитический контур позже момента их фактического возникновения и не в исходном порядке. Такая рассинхронизация приводит к ошибкам при построении агрегированных временных показателей, а регулярный полный пересчёт многомерного аналитического куба требует значительных вычислительных затрат. Целью ...

Added: October 2, 2026

Polarization of opinions in the group: a modeling algorithm considering the dynamics of social bonds

Chebotarev V., Andreyuk D., Elizarova Anastasiya et al., Procedia Computer Science 2022 Vol. 213 No. C P. 596–601

The dynamics of opinion in a group are of interest for a number of practical purposes. In particular, consensus helps and polarization of opinions hinders cohesive teamwork. Existing approaches for modeling opinion dynamics mostly do not take into account the dynamism of social relations in a group. This paper proposes an algorithm and a program ...

Added: October 2, 2026

Enhancing Boundary Stability in Decision Trees and Random Forests: A Weighted Sample Duplication Approach

Konstantinov A., Elizarova Anastasiya P., Utkin L., Computing, Telecommunications and Control 2026 Vol. 19 No. 1 P. 16–25

Decision trees and their ensemble extensions, such as random forests, are widely used as classification models due to their simplicity and interpretability. However, in many real-world tasks where class labels overlap in the feature space, standard decision trees rely on hard splits that create fragile decision boundaries. In these regions, small perturbations in the input ...

Added: October 2, 2026

Enhancement of superconductivity by polarization of magnetic impurities in disordered films

Seleznev G., Fominov Yakov V., Physical Review B: Condensed Matter and Materials Physics 2026 Vol. 114 No. 7 Article 074505

Dirty superconducting films with magnetic impurities can exhibit nontrivial behavior in a magnetic field that polarizes the impurity spins. As predicted by Kharitonov and Feigelman (KF) [JETP Lett. 82, 421 (2005)], this polarization reduces the exchange scattering rate. Consequently, a parallel magnetic field can enhance the critical temperature Tc when magnetic-field pair breaking is weak, as realized for ...

Added: October 2, 2026

Advances in colloidal anisotropic nanocrystals for high-efficiency light-emitting diodes

Zhukov A., Chen F., Zeng Y. et al., Nanoscale 2026 Vol. 18 No. 36 P. 19223–19253

Colloidal semiconductor nanocrystals have emerged as promising materials for next-generation light-emitting diodes (LEDs) owing to their solution processability, tunable emission wavelengths, narrow emission linewidths, and high photoluminescence quantum yields. Among them, anisotropic nanocrystals, including one-dimensional nanorods (NRs) and two-dimensional nanoplatelets (NPLs), offer additional opportunities for controlling transition dipole moment orientation and light out-coupling efficiency. These ...

Added: October 2, 2026

Improved measurement of Born cross sections for chi_bJ omega and chi_bJ (pi+ pi- pi0)non-omega (J = 0, 1, 2) at Belle and Belle II

Uglov T., Pakhlov P., Bodrov D. et al., Journal of High Energy Physics 2026 Vol. 04 Article 101

We study the processes chi_bJ omega and chi_bJ (pi+ pi- pi0)non-omega (J = 0, 1, 2) at center-of-mass energies sqrt(s) from 10.73 to 11.02 GeV using a 142.5 fb^-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider; and at sqrt(s) ~ 10.75 GeV using a 19.8 fb^-1 sample collected with ...

Added: October 2, 2026

Observation of e+e- -> eta Upsilon(2S) and search for e+e- -> eta Upsilon(1S), gamma X_b at sqrt(s) near 10.75 GeV

Uglov T., Pakhlov P., Bodrov D. et al., Physical Review Letters 2026 Vol. D No. 113 Article L051102

We present an analysis of the processes e+ e- -> eta Upsilon(1S), eta Upsilon(2S), and gamma X_b with X_b -> pi+ pi- chi_bJ, chi_bJ -> gamma Upsilon(1S) (J = 1, 2) reconstructed from gamma gamma pi+ pi- l+ l- (l = e, mu) final states in 19.6 fb^-1 of Belle II data collected at four ...

Added: October 2, 2026

First Search for B -> Xs nu nubar Decays

Bodrov D., Pakhlova G., Aushev Т. et al., Physical Review Letters 2026 Vol. 136 No. 23 Article 231801

We report the first search for the flavor-changing neutral-current decays B -> Xs nu nubar, where Xs is a hadronic system with strangeness equal to 1, in data collected with the Belle II detector at the SuperKEKB asymmetric-energy e+ e- collider. The data sample corresponds to an integrated luminosity of 365 fb^-1 collected at the ...

Added: October 2, 2026

Search for e+ e- -> gamma chi_bJ (J = 0, 1, 2) near sqrt(s) = 10.746 GeV at Belle II

Pakhlova G., Bodrov D., Aushev Т. et al., Physical Review Letters 2026 Vol. D No. 113 Article 052009

We search for the e+ e- -> gamma chi_bJ (J = 0, 1, 2) processes at center-of-mass energies sqrt(s) = 10.653, 10.701, 10.746, and 10.804 GeV. These data were collected with the Belle II detector at the SuperKEKB collider and correspond to 3.5, 1.6, 9.8, and 4.7 fb^-1 of integrated luminosity, respectively. We set upper ...

Added: October 2, 2026

Measurement of inclusive B -> Xu l nu partial branching fractions and |Vub| at Belle II

Bodrov D., Pakhlova G., Aushev Т. et al., Physical Review Letters 2026 Vol. D No. 113 Article 032004

A sample of 365 fb^-1 of e+ e- -> Upsilon(4S) -> B Bbar data collected by the Belle II experiment is used to measure the partial branching fractions of charmless semileptonic B meson decays and determine the magnitude of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element V_ub. Events containing a signal electron or muon l and a ...

Added: October 2, 2026

Measurement of the CP asymmetry in D0 -> pi+ pi- pi0 decays at Belle II

Bodrov D., Pakhlova G., Aushev Т. et al., Physical Review Letters 2026 Vol. D No. 113 Article 052006

We measure the time- and phase-space-integrated CP asymmetry ACP in D0 -> pi+ pi- pi0 decays reconstructed in e+ e- -> c cbar events collected by the Belle II experiment from 2019 to 2022. This sample corresponds to an integrated luminosity of 428 fb^-1. We require D0 mesons to be produced in D*+ -> D0 ...

Added: October 2, 2026

Study of e+e- -> h+h- J/psi (h = pi, K, p) via initial-state radiation at Belle II

Pakhlov P., Pakhlova G., Bodrov D. et al., Physical Review Letters 2026 Vol. D No. 113 Article 112010

Using a data sample of 427.9 fb^-1 collected by the Belle II detector at or near the Upsilon(4S) and Upsilon(10753) resonances, the cross sections for e+ e- -> h+ h- J/psi (h = pi/K/p) at center-of-mass energies ranging from 3.8 GeV or the production threshold to 5.5/6.0/7.0 GeV have been measured via initial-state radiation. The ...

Added: October 2, 2026

An early warning system for emerging markets

Kraevskiy A., Sokolovskiy E., Prokhorov A., Emerging Markets Review 2026 No. 74 P. 1–19

Financial markets of emerging economies are vulnerable to extreme and cascading information spillovers, surges, sudden stops and reversals. With this in mind, we develop a new online early warning system (EWS) to detect what is referred to as ‘concept drift’ in machine learning, as a ‘regime shift’ in economics and as a ‘change-point’ in statistics. ...

Added: September 25, 2026

Reach: Recognising episodes of acute complexity in health: a predictive older patient prioritisation machine learning model

Maghsoohi A., Pavlov V., Rouse P. et al., Health Care Management Science 2026 Vol. 29 Article 37

As the numbers of older people (65 +) rise globally, the pressure on acute hospitals to provide efficient and effective care while addressing resource inequities increases. In this study we introduce Recognising Episodes of Acute Complexity in Health (REACH), a novel Automatic Machine Learning (AutoML)-based predictive model that prioritises older patients and assigns them to complex ...

Added: July 30, 2026

Analysis of Network State by RIPE Atlas Distributed Measurement System

Izyumov P., Ivchenko A., , in: 2024 26th International Conference on Digital Signal Processing and its Applications (DSPA).: IEEE, 2024. P. 1–5.

The paper describes the issues of setting up an experiment, limitations, and features of the platform, primarily focusing on the influence of hardware and software versions of probes, network types, and cross-traffic. The impact of new versions of software and hardware requires analysis and con-sideration in further data work. Additionally, the nature of the global ...

Added: June 28, 2026

Interpretable Machine Learning in Guided Synthesis of Stable Sols Based on Nanosized Titanium Oxides

Glushko A., Neznanov A., Kuz'micheva G. et al., , in: 2026 International Conference on Artificial Intelligence, Computer, Data Sciences and Applications (ACDSA), 5-7 Feb. 2026.: IEEE, 2026. P. 1–6.

This report discusses the guided synthesis of sols containing nanosized titanium(IV) oxides for use in biological and medical applications. These sols vary in size (from ∼2 up to 2000nm) and different stability (from 0 up to 90 days). They are synthesized under changing fabrication conditions (temperature, hydrolysis duration, titanium-containing precursors composition and concentration) without surfactants. ...

Added: April 29, 2026

WWW '26: Proceedings of the ACM Web Conference 2026

NY: Association for Computing Machinery (ACM), 2026.

It is our great pleasure to welcome you to the 35th edition of the Web Conference to be held on June 29 – July 3, 2026, in Dubai, United Arab Emirates. Following discussions with our partners and key stakeholders, we have taken the decision to postpone the ACM Web Conference 2026, initially planned for April 2026. ...

Added: April 17, 2026

The hidden machinery of entrepreneurial culture: a data mining approach of ecosystem-level drivers

Chieregato Vicentin D., Salati Marcondes de Moraes G. H., Fischer B. et al., Journal of Intellectual Capital 2026 Vol. 27 No. 4 P. 951–974

Purpose This study investigates the main contextual determinants of entrepreneurial culture (EC) in emerging ecosystems, interpreting EC as an intangible resource that affects the dynamics of Intellectual Capital within entrepreneurial ecosystems. It analyzes how factors based on the pillars of such ecosystems influence perceptions regarding structural conditions associated with creativity and innovation in a given region. Design/methodology/approach A ...

Added: March 11, 2026