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Earlier sources: Science
Science investigates the natural world through observation, experiments, and mathematical models. Explore papers and developments in biology, medicine, materials, neuroscience, physics, climate, and mathematics; a reported finding is not necessarily established consensus.
SYMTRI organizes observations from public sources into a living map. Connections reflect shared subject matter; they do not establish causation or endorse a source.
Open in the map ↗1327 classified signals in the fourteen-day window. Recent momentum: steady. These counts include signals awaiting readable evidence.
Earlier sources
Up to ten sources with readable evidence, ordered by their feed timestamp. These archive sources can be older than the live fourteen-day window. This list is a sample, not a measure of total activity. Dates distinguish paper publication, repository creation, model/dataset activity, Hacker News posts, and KEV catalog additions. “First archived” records when SYMTRI first stored the signal.
- OpenAlex · Published · First archived
Multiscale Modeling Methods for District Heating Systems: From Physics-Based Approaches to Data-Driven Integration ↗
District heating systems are transitioning from conventional high-temperature systems to 4GDH/5GDHC systems, giving system modeling more pronounced multiscale characteristics in physical hierarchy, temporal dynamics, and model abstraction. To support planning, optimization, control, and fault diagnosis, this paper systematically reviews district heating system modeling methods based on 185 representative publications and relevant sources. The review is organized around four modeling objects: heat sources, distribution networks, end users, and core components. It summarizes steady-state, quasi-…
- OpenAlex · Published · First archived
Fibonacci–Lucas Recurrence-Indexed Quaternionic Unitaries: Channel Convergence, Clifford Proximity, and Controlled Entanglement ↗
We investigate the normalized operator geometry of the mixed Fibonacci–Lucas quaternion Qn = Fn + Lni + Fn+1j + Ln+1k. Standard quaternion representations associate this sequence with single-qubit unitary channels. We first establish a convergence theorem for quaternion sequences with two distinct real characteristic roots and a strictly dominant positive root. It gives an exact average gate infidelity to the limit and sharp projective-step asymptotics, including the degenerate constant-channel case. For the Fibonacci–Lucas assignment, orthogonal Binet coefficient vectors yield exact finite-in…
- OpenAlex · Published · First archived
Concatenation, Splicing and Insertion–Deletion Operations on Cyclic DNA Molecules ↗
Splicing systems (H-systems) and insertion-deletion systems are well-studied DNA computing paradigms inspired by biological operations observed in nature. They are modelled in a formal, information-theoretic manner. In these systems, splicing, insertion and deletion operations are used. In this paper, we study these operations on circular words, which naturally model cyclic DNA molecules, focusing on the relationship between algebraic operations and biologically inspired string transformations. In particular, we formally compare concatenation with circular splicing and insertion. While the spl…
- OpenAlex · Published · First archived
Nucleotide co-delivery modulates intracellular fate of LNP-delivered mRNA to enhance translation ↗
Messenger RNA (mRNA) therapeutics offer a versatile platform for protein production, but preserving mRNA during delivery remains a major challenge. Here, we report that co-delivery of nucleotides with lipid nanoparticle (LNP)-formulated mRNA significantly enhances translation efficiency across multiple cell types. Systematic screening identifies adenosine triphosphate (ATP) and guanosine triphosphate (GTP) as effective enhancers, increasing protein expression by up to 13-fold, accompanied by ~6–8-fold increases in intracellular intact mRNA levels. The non-hydrolyzable nucleotide analogues aden…
- OpenAlex · Published · First archived
Physics-guided interpretable machine learning for explicit resistance equation discovery in concrete penetration ↗
Classical Forrestal penetration calculations are attractive because they are explicit, but their empirical strength-only resistance term is too restrictive for heterogeneous concrete-penetration data. This study derives a closed-form resistance equation from a governed literature dataset, reducing 497 raw records from 41 source blocks to 443 useable records from 37 sources through duplicate removal, governed density completion, deep-penetration filtering, and descriptor-only anomaly screening. Forrestal inversion maps each measured penetration depth to an operator-consistent effective resistan…
- OpenAlex · Published · First archived
Complete genome sequence of Bifidobacterium longum BL020 (DSM 33815): a human stool-derived strain from the NORDBIOTIC collection ↗
ABSTRACT We report the complete genome sequence of Bifidobacterium longum BL020 (DSM 33815), a human stool-derived strain from the NORDBIOTIC collection. The genome consists of a single circular chromosome of 2,413,342 bp with a G + C content of 60.0%.
- OpenAlex · Published · First archived
Structural basis for ITP-selective hydrolysis by a CRISPR-associated Nudix hydrolase ↗
ABSTRACT The nucleoside diphosphates linked to moiety-X (Nudix) hydrolases are a superfamily of proteins defined by the characteristic Nudix box sequence, most of which are involved in clearing the cell of potentially deleterious metabolites and in preventing the accumulation of metabolic intermediates. The Nudix hydrolase associated with CRISPR-Cas-associated adenosine deaminases (CAAD) from Limisphaera ngatamarikiensis ( Lng NH) mitigates CAAD-induced toxicity by hydrolyzing ITP to IMP and pyrophosphate. Here, we determined crystal structures of Lng NH in the apo form and in complex with ITP…
- OpenAlex · Published · First archived
Amplitude-constrained and phase-supervised physics-guided color holography for realistic three-dimensional scenes ↗
The degraded reconstruction quality in multi-plane holography is mainly manifested by inter-plane crosstalk, defocus, and speckle. To address these coupled artifacts, this paper proposes MpD-Holo, a multi-plane holographic display method driven by depth estimation and physics-based supervision. A monocular depth network first predicts relative depth, which is discretized by K-means depth clustering (KDC) into display planes. A two-stage complex-amplitude and phase-estimation network then generates phase-only holograms under angular-spectrum propagation constraints. Phase pseudo-labels generate…
- OpenAlex · Published · First archived
Optimization of DNA extraction from fresh and dried Pinus brutia needles using different homogenization methods: An approach for forensic botanical applications ↗
Obtaining sufficient DNA from plant tissues is essential for molecular taxonomy, population genetics, conservation biology, and forensic botany. However, DNA extraction from conifer species remains challenging because their tissues contain high concentrations of polysaccharides, polyphenols, terpenoids, and resin compounds that may interfere with DNA isolation and downstream molecular analyses. This study aimed to evaluate the effects of sample condition and homogenization method on DNA concentration obtained from fresh and dried needles of Pinus brutia, one of the most widespread conifer spec…
- OpenAlex · Published · First archived
Strong-Field Physics in Intense Few-Cycle Laser Fields: From Carrier-Envelope-Phase Effects to Waveform Engineering ↗
The generation of intense few-cycle laser pulses with a stabilized carrier-envelope phase (CEP) has enabled unprecedented control of strong-field laser–matter interactions on an attosecond time scale. Few-cycle laser fields allow direct manipulation of the instantaneous electric-field waveform, making the CEP and other waveform parameters fundamental tools for steering electron dynamics. In this review, we present a comprehensive overview of the role of waveform control in strong-field processes driven by intense few-cycle laser pulses. We discuss the generation and characterization of few-cyc…
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Check each original source for its methods, release status, limitations, and supporting data. A repository announcement, a preprint, and a published study provide different kinds of evidence. SYMTRI’s subject classification helps discovery; it does not independently validate the source’s claims.
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