cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.djqtw7
title: Occurrence Download

description: A dataset containing 4 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Ecuador",
 "Geometry POLYGON((-80.07258 -4.59713,-79.2735 -4.59713,-79.2735 -3.80437,-80.07258 -3.80437,-80.07258 -4.59713))",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 "TaxonKey is Anastrepha fratercula (Wiedemann, 1830)"
 ]
}

 The dataset includes 4 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014525-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.15571529
title: Tab. 1 in The genus Epicasta Thomson, 1864 and the limits of the morphological systematics in the study of Lamiinae (Coleoptera Cerambycidae)

description: Tab. 1. The considered species set of characters usually used to define genera and even tribes.
biocellatamalayanaocellataturbidaprosternumroundedtruncatedtruncatedtruncatedscaperidgedridgedsimplesimplehumerusroundedroundedroundedangulatedoriginal genusDihammusEpicastaPsaumisoriginal tribeAgniiniZygoceriniHypselominaecurrent genusAcaloleptaEpicastaEpicastacurrent tribeLamiiniDesmiphoriniDesmiphorini
description: Published as part of Vitali, Francesco, 2025, The genus Epicasta Thomson, 1864 and the limits of the morphological systematics in the study of Lamiinae (Coleoptera Cerambycidae), pp. 2 in Faunitaxys 13 (7) on page 2, DOI: 10.57800/faunitaxys-13(07), http://zenodo.org/record/15352749
DOI: 10.15468/dl.s4p3ew
title: Occurrence Download

description: A dataset containing 76 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Occurrence evidence)",
 "Geometry POLYGON((-86.38038 40.72664,-82.55388 40.72664,-82.55388 45.43619,-86.38038 45.43619,-86.38038 40.72664))",
 "OccurrenceStatus is Present",
 "TaxonKey is Peromyscus maniculatus (Wagner, 1845)"
 ]
}

 The dataset includes 76 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014526-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.numbwm
title: Occurrence Download

description: A dataset containing 7789 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Verbena brasiliensis Vell.)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present"
 ]
}

 The dataset includes 7789 records from 197 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014527-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mujwt3
title: Occurrence Download

description: A dataset containing 85809 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Colombia",
 "Geometry POLYGON((-75.57396 6.26236,-75.5715 6.26524,-75.56681 6.26491,-75.56648 6.26923,-75.56246 6.26768,-75.56179 6.2709,-75.56447 6.27389,-75.56882 6.27556,-75.57306 6.26635,-75.57608 6.27223,-75.58322 6.27367,-75.58768 6.26923,-75.58534 6.26202,-75.57775 6.25892,-75.57396 6.26236))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present"
 ]
}

 The dataset includes 85809 records from 67 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014515-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.4bfj7k
title: Occurrence Download

description: A dataset containing 45 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Occurrence evidence)",
 "Geometry POLYGON((-99.13854 34.00995,-91.80426 34.00995,-91.80426 39.28404,-99.13854 39.28404,-99.13854 34.00995))",
 "OccurrenceStatus is Present",
 "TaxonKey is Peromyscus maniculatus (Wagner, 1845)"
 ]
}

 The dataset includes 45 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014528-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.zr7fe8
title: Occurrence Download

description: A dataset containing 2342 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Specimen)",
 "Country is Colombia",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Spatula cyanoptera (Vieillot, 1816)"
 ]
}

 The dataset includes 2342 records from 29 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014529-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ph87yd
title: Occurrence Download

description: A dataset containing 88 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Occurrence evidence)",
 "Geometry POLYGON((-82.08703 34.95388,-77.43935 34.95388,-77.43935 41.4431,-82.08703 41.4431,-82.08703 34.95388))",
 "OccurrenceStatus is Present",
 "TaxonKey is Peromyscus maniculatus (Wagner, 1845)"
 ]
}

 The dataset includes 88 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014530-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.34740/kaggle/dsv/12030240
title: Peer-to-Peer Boliviano (BOB) Exchange Data
DOI: 10.15468/dl.mpb6jt
title: Occurrence Download

description: A dataset containing 57 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Occurrence evidence)",
 "Geometry POLYGON((-77.5446 40.88183,-70.42824 40.88183,-70.42824 43.62671,-77.5446 43.62671,-77.5446 40.88183))",
 "OccurrenceStatus is Present",
 "TaxonKey is Peromyscus maniculatus (Wagner, 1845)"
 ]
}

 The dataset includes 57 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014532-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.gastdg
title: Occurrence Download

description: A dataset containing 5199 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Verbena litoralis Kunth)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present"
 ]
}

 The dataset includes 5199 records from 281 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014533-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.17632/gzxjyjckyg
title: Resilience of Paddy Production to Natural Disasters: Evidence from the 2015 Nepal Earthquake

description: This replication zip file contains do file and associated raw data for the replication of results presented in the manuscript,
DOI: 10.17632/gzxjyjckyg.1
title: Resilience of Paddy Production to Natural Disasters: Evidence from the 2015 Nepal Earthquake

description: This replication zip file contains do file and associated raw data for the replication of results presented in the manuscript,
DOI: 10.17632/nvr6g3fwgb
title: RTA_JBC_2025

description: Chemical Shift perturbation analysis of small molecules binding to wild-type RTA.
DOI: 10.17632/nvr6g3fwgb.1
title: RTA_JBC_2025

description: Chemical Shift perturbation analysis of small molecules binding to wild-type RTA.
DOI: 10.17632/btm76zndnt.1
title: Help Desk Tickets

description: These datasets were created as part of a study involving an experiment with a helpdesk team at an international software company. The goal was to implement an automated performance appraisal model that evaluates the team based on issue reports and key features derived from classifying message exchanged with the customers using Dialog Acts. The data was extracted from a PostgreSQL database and curated to present aggregated views of helpdesk tickets reported between January 2016 and March 2023. Certain fields have been anonymized (masked) to protect the data owner’s privacy while preserving the overall meaning of the information. The datasets are:
- issues.csv
Dataset holds information for all reported tickets, showing its category, priority, who reported the issue, related project, who was assigned to resolve that ticket, the start time, the resolution time, and how many seconds the ticket spent in each resolution step.
- issues_change_history.csv
Shows when the ticket assignee and status were changed. This dataset helps calculate the time spent on each step.
- issues_snapshots.csv
Contains the same records in the issues.csv but duplicates the tickets that multiple assignees handled; each record is the processing cycle per assignee.
- scored_issues_snapshot_sample.xlsx
A stratified and representative sample extracted from the tickets and then handed to an annotator (the help-desk manager) to appraise the resolution performance against three targets, where 5 is the highest score and 1 is the lowest.
- sample_utterances.csv
Contains the messages (comments) that were exchanged between the reporters and the helpdesk team. This dataset only contains the curated messages for the issues listed in scored_issues_snapshot_sample.xlsx, as those were the focus of the initial study.

The following files are guidelines on how to work and interpret the datasets:
- FEATURES.md
Describes the datasets features (fields).
- EXAMPLE.md
Shows an example of an issue in all datasets so the reader can understand the relations between them.
- process-flow.png
A demonstration of the steps followed by the helpdesk team to resolve an issue.

These datasets are valuable for many other experiments such like:
- Count Predictions
- Regression
- Association rules mining
- Natural Language Processing
- Classification
- Clustering
DOI: 10.17632/jx59t358zy.1
title: Quantified_Poly(A)_Interactome_Capture

description: This data is related to the publication 'Metabolic tuning enables immediate adaptation to energy stress in yeast', and is discussed there in detail.

Summarised hypothesis and experiment:
Recruitment of the 40S and 60S ribosomal subunits at the start codon of a transcript is mediated by ‘scanning’ initiation factors, which unwind secondary structures in the mRNA to grant access to this site. These are eIF4B and two DEAD-box RNA helicases, eIF4A and Ded1 that act to promote 43S-complex loading . In response to glucose withdrawal, binding of these factors to transcripts is lost, which directly blocks formation of new 80S ribosomes.

To confirm the timescale of initiation factor displacement from mRNA transcripts, we developed a poly(A) interactome capture approach. RNAs were UV crosslinked to bound proteins in cells grown in glucose or at timepoints immediately following transfer to Glc/EthOH medium. Poly(A)+ RNAs were purified from cell lysates using oligo[dT]25 beads.

Western blot analysis was used to compare amounts of Flag-tagged initiation factors (eIF4A/eIF4B) in inputs and eluates of poly(A) interactome capture. Poly(A)-binding protein (Pab1) acted as a control for input and pull-down efficiency. 

Membranes were visualized by chemiluminescent imaging using the LiCor Odyssey CLx imaging system (LICORbio). Quantitative analysis of captured images was performed with the Image Studio software (LICORbio). 

The following antibodies were used: rat Anti-DYKDDDDK Tag Antibody (1:1000; Agilent, 200474), mouse Pab1p Monoclonal Antibody (1G1) (1:1000; Invitrogen, MA5-47390), IRDye 800CW Goat anti-Rat IgG Secondary Antibody (1:5000; LICORbio, 926-32219), IRDye 680RD Goat anti-Mouse IgG Secondary Antibody (1:5000; LICORbio, 926-68070). 

Provided data:
The .pdf provided shows all Western blots quantified in the published manuscript (duplicate for each experiment), with the loading scheme and annotation.
The raw are .tif files for each of these are also provided. In naming, '2GE' represents withdrawal from 2% sugar to 2% glcyerol and 2% ethanol and AA indicates addition of the mitochondrial inhibitior Antimycin A.
DOI: 10.6084/m9.figshare.29203496
title: <b>CUIDADOS EM SAÚDE MENTAL NO TRATAMENTO DE CIRURGIA BARIÁTRICA: UMA REVISÃO DE ESCOPO</b>

description: Este protocolo tem como objetivo mapear as evidências científicas disponíveis sobre os cuidados em saúde mental destinados a pessoas em pré e pós-operatório de cirurgia bariátrica. A obesidade é reconhecida como uma condição crônica multifatorial que acarreta impactos psicossociais importantes, exigindo uma abordagem interdisciplinar. No entanto, ainda há lacunas na sistematização de condutas voltadas ao suporte emocional desses pacientes.A revisão será conduzida conforme as diretrizes do JBI Manual for Evidence Synthesis e seguirá o checklist PRISMA-ScR. A pergunta de pesquisa foi estruturada com base na estratégia PCC: P (pessoas em pré e pós-operatório bariátrico), C (cuidados em saúde mental) e C (contexto do tratamento cirúrgico bariátrico). Serão incluídas diversas fontes de dados, incluindo literatura cinzenta, sem restrições temporais ou linguísticas.A análise dos dados será realizada por meio de abordagem quantitativa (descrição dos estudos) e qualitativa (análise de conteúdo de Bardin), com vistas a subsidiar práticas clínicas baseadas em evidências e orientar futuras diretrizes assistenciais. Espera-se, com isso, contribuir para o aprimoramento da assistência e a promoção da saúde mental nesse contexto cirúrgico.<br><br><br>
DOI: 10.6084/m9.figshare.29203496.v1
title: <b>CUIDADOS EM SAÚDE MENTAL NO TRATAMENTO DE CIRURGIA BARIÁTRICA: UMA REVISÃO DE ESCOPO</b>

description: Este protocolo tem como objetivo mapear as evidências científicas disponíveis sobre os cuidados em saúde mental destinados a pessoas em pré e pós-operatório de cirurgia bariátrica. A obesidade é reconhecida como uma condição crônica multifatorial que acarreta impactos psicossociais importantes, exigindo uma abordagem interdisciplinar. No entanto, ainda há lacunas na sistematização de condutas voltadas ao suporte emocional desses pacientes.A revisão será conduzida conforme as diretrizes do JBI Manual for Evidence Synthesis e seguirá o checklist PRISMA-ScR. A pergunta de pesquisa foi estruturada com base na estratégia PCC: P (pessoas em pré e pós-operatório bariátrico), C (cuidados em saúde mental) e C (contexto do tratamento cirúrgico bariátrico). Serão incluídas diversas fontes de dados, incluindo literatura cinzenta, sem restrições temporais ou linguísticas.A análise dos dados será realizada por meio de abordagem quantitativa (descrição dos estudos) e qualitativa (análise de conteúdo de Bardin), com vistas a subsidiar práticas clínicas baseadas em evidências e orientar futuras diretrizes assistenciais. Espera-se, com isso, contribuir para o aprimoramento da assistência e a promoção da saúde mental nesse contexto cirúrgico.<br><br><br>
DOI: 10.15468/dl.sbnjv8
title: Occurrence Download

description: A dataset containing 22 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Occurrence evidence)",
 "Geometry POLYGON((-112.55548 33.99878,-104.99841 33.99878,-104.99841 38.802,-112.55548 38.802,-112.55548 33.99878))",
 "OccurrenceStatus is Present",
 "TaxonKey is Peromyscus maniculatus (Wagner, 1845)"
 ]
}

 The dataset includes 22 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014535-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.9ynvqa
title: Occurrence Download

description: A dataset containing 120 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Occurrence evidence)",
 "Geometry POLYGON((-117.66544 29.45282,-114.27116 29.45282,-114.27116 34.06392,-117.66544 34.06392,-117.66544 29.45282))",
 "OccurrenceStatus is Present",
 "TaxonKey is Peromyscus maniculatus (Wagner, 1845)"
 ]
}

 The dataset includes 120 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014536-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.6nraj4
title: Occurrence Download

description: A dataset containing 1 records in GBIF matching the query:
SELECT
 kingdom,
 kingdomkey,
 phylum,
 phylumkey,
 class,
 classkey,
 "order",
 orderkey,
 family,
 familykey,
 genus,
 genuskey,
 species,
 specieskey,
 "year",
 IF(ISNULL(kingdomkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY kingdomkey, "year")) kingdomcount,
 IF(ISNULL(phylumkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY phylumkey, "year")) phylumcount,
 IF(ISNULL(classkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY classkey, "year")) classcount,
 IF(ISNULL(orderkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY orderkey, "year")) ordercount,
 IF(ISNULL(familykey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY familykey, "year")) familycount,
 IF(ISNULL(genuskey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY genuskey, "year")) genuscount,
 COUNT(*) occurrences,
 MIN(GBIF_TEMPORALUNCERTAINTY(eventdate, eventtime)) mintemporaluncertainty,
 MIN(COALESCE(coordinateuncertaintyinmeters, 1000)) mincoordinateuncertaintyinmeters
FROM
 occurrence
WHERE
 occurrence.countrycode = 'EC'
 AND GBIF_WITHIN('POLYGON((-80.07258 -4.59713,-79.2735 -4.59713,-79.2735 -3.80437,-80.07258 -3.80437,-80.07258 -4.59713))', occurrence.decimallatitude, occurrence.decimallongitude) = TRUE
 AND occurrence.hascoordinate = TRUE
 AND occurrence.occurrencestatus = 'PRESENT'
 AND (occurrence.taxonkey = 1625168 OR occurrence.acceptedtaxonkey = 1625168 OR occurrence.kingdomkey = 1625168 OR occurrence.phylumkey = 1625168 OR occurrence.classkey = 1625168 OR occurrence.orderkey = 1625168 OR occurrence.familykey = 1625168 OR occurrence.genuskey = 1625168 OR occurrence.specieskey = 1625168)
 AND occurrence.hasgeospatialissues = FALSE
 AND NOT GBIF_STRINGARRAYCONTAINS(occurrence.issue, 'TAXON_MATCH_FUZZY', TRUE)
 AND (occurrence.distancefromcentroidinmeters &gt;= 2000.0 OR occurrence.distancefromcentroidinmeters IS NULL)
 AND NOT occurrence.basisofrecord IN ('FOSSIL_SPECIMEN', 'LIVING_SPECIMEN')
 AND (occurrence.specieskey IS NOT NULL AND occurrence."year" IS NOT NULL)
GROUP BY
 occurrence.kingdom,
 occurrence.kingdomkey,
 occurrence.phylum,
 occurrence.phylumkey,
 occurrence.class,
 occurrence.classkey,
 occurrence."order",
 occurrence.orderkey,
 occurrence.family,
 occurrence.familykey,
 occurrence.genus,
 occurrence.genuskey,
 occurrence.species,
 occurrence.specieskey,
 occurrence."year"

 The dataset's 1 records were derived from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014531-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.zz6vn2
title: Occurrence Download

description: A dataset containing 139 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Occurrence evidence)",
 "Geometry POLYGON((-98.71176 19.17861,-98.39154 19.17861,-98.39154 19.73098,-98.71176 19.73098,-98.71176 19.17861))",
 "OccurrenceStatus is Present",
 "TaxonKey is Peromyscus maniculatus (Wagner, 1845)"
 ]
}

 The dataset includes 139 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014537-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.58pc88
title: Occurrence Download

description: A dataset containing 16 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Occurrence evidence)",
 "Geometry POLYGON((-101.10897 24.37028,-100.08428 24.37028,-100.08428 25.90732,-101.10897 25.90732,-101.10897 24.37028))",
 "OccurrenceStatus is Present",
 "TaxonKey is Peromyscus maniculatus (Wagner, 1845)"
 ]
}

 The dataset includes 16 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014538-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.2cwcpy
title: Occurrence Download

description: A dataset containing 19 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Occurrence evidence)",
 "Geometry POLYGON((-105.35791 18.85315,-102.9563 18.85315,-102.9563 21.95923,-105.35791 21.95923,-105.35791 18.85315))",
 "OccurrenceStatus is Present",
 "TaxonKey is Peromyscus maniculatus (Wagner, 1845)"
 ]
}

 The dataset includes 19 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014539-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.kzb9aa
title: Occurrence Download

description: A dataset containing 49385 species occurrences available in GBIF matching the query:
{
 "and" : [
 "OccurrenceStatus is Present",
 "TaxonKey is Columbina cruziana (Prévost, 1842)"
 ]
}

 The dataset includes 49385 records from 54 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014540-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.6084/m9.figshare.29207324
title: Charging and Discharging Capacitors: Brightspace Package of an Arithmetic Quiz

description: Charging and Discharging Capacitors: Brightspace Package of an Arithmetic Quiz Vasiliy Znamenskiy vznamenskiy@bmcc.cuny.edu Description: This material is a quiz in the Brightspace Learning Management System (LMS). The quiz includes 10 physics problems on the topic of charging and discharging capacitors through a resistor. The quiz assesses student understanding of key concepts, including voltage and charge of a capacitor, exponential functions, time constants, and dynamic changes in voltage and current. Quiz problems are called in Brightspace LMS as so-called arithmetic questions. The problems provide students with random initial values to generate many quiz variants. The quiz is appropriate for high school AP Physics or introductory college-level physics courses. Key Features: 10-question quiz in Brightspace importable format (.zip) aligned with RC circuit learning objectives, covers exponential charging/discharging, time constant. Ready for direct use in LMS. Suitable for homework, formative assessment, or quizzes. Educational Level: High School (Advanced Placement), Undergraduate (Introductory Physics). Format: Brightspace Quiz Package (.zip). Keywords: capacitors, charging and discharging, RC circuits, exponential decay, exponential growth, time constant, voltage, current, physics quiz, Brightspace LMS, physics education, electric circuits, formative assessment, AP Physics, introductory college physics, interactive quiz, randomized physics problems, electrical components, capacitor voltage function