cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.2nqb3u
title: Occurrence Download

description: A dataset containing 3824 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Artemisia absinthium",
 "Country is Canada",
 "HasCoordinate is true"
 ]
}

 The dataset includes 3824 records from 30 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009153-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.vmqxjz
title: Occurrence Download

description: A dataset listing the 4046640 species recorded in GBIF matching the query:
{
 "OccurrenceStatus" : [
 "is Present"
 ]
}

 The dataset's 4046640 records were derived from 74471 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009118-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.dttdmc
title: Occurrence Download

description: A dataset containing 2 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is BOLD:ADW3706"
 ]
}

 The dataset includes 2 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009154-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.zbac4q
title: Occurrence Download

description: A dataset containing 3160 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Hieracium staticifolium"
 ]
}

 The dataset includes 3160 records from 52 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009155-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ye5gf9
title: Occurrence Download

description: A dataset containing 1994 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Korea, Republic of",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Corylus heterophylla"
 ]
}

 The dataset includes 1994 records from 53 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009157-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.eruhrw
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Notomys macrotis"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009160-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.3mj4mu
title: Occurrence Download

description: A dataset containing 4210 species occurrences available in GBIF matching the query:
{
 "and" : [
 "GadmGid is ECU.9_1",
 "OccurrenceStatus is Present",
 "TaxonKey is Spheniscus mendiculus"
 ]
}

 The dataset includes 4210 records from 16 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009158-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.q4jfwp
title: Occurrence Download

description: A dataset containing 6235 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Erythroxylum suberosum"
 ]
}

 The dataset includes 6235 records from 192 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009159-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.sdfsub
title: Occurrence Download

description: A dataset containing 908 species occurrences available in GBIF matching the query:
{
 "and" : [
 "GadmGid is ECU.9_1",
 "OccurrenceStatus is Present",
 "TaxonKey is Laterallus spilonotus"
 ]
}

 The dataset includes 908 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009161-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.rg67f7
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is BOLD:ADW7401"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009162-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.pu4ujt
title: Occurrence Download

description: A dataset containing 40053 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Commelina erecta"
 ]
}

 The dataset includes 40053 records from 621 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009156-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.9t3dvu
title: Occurrence Download

description: A dataset containing 42 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Austrolebias cinereus (Amato, 1986)"
 ]
}

 The dataset includes 42 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0263116-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.73skxj
title: Occurrence Download

description: A dataset containing 61 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Ustilago scitaminea Syd."
 ]
}

 The dataset includes 61 records from 19 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0248332-220831081235567/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.26003413
title: Supplementary Data - Electrochemical Measurements.zip

description: This set provides supplementary data for the following paper: Tatiana Blank, André Marcel Ahrens, Christian Klose, Demircan Canadinç, Thomas Lenarz, Hans Jürgen Maier: Investigating mechanical deformation's role in cochlear implant durability, PLOS one,<b> 2024</b>The dataset includes the raw files for the electrochemical measurements for each foil. First, the cyclovoltammetry measurements in sulfuric acid for the as-received, cold-rolled, cold-rolled and then heat-treated and hot-rolled conditions. The same was done for the artificial perilymph. The polarization curves are also shown for all four conditions.
DOI: 10.15468/dl.ethtgd
title: Occurrence Download

description: A dataset containing 294 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Eriospermum cooperi Baker"
 ]
}

 The dataset includes 294 records from 25 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0252133-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.86d7xa
title: Occurrence Download

description: A dataset containing 42 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Berberis jamesiana Forrest & W.W.Sm.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 42 records from 11 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0263112-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.47
title: Dynamic Programming
DOI: 10.15468/dl.uqyudd
title: Occurrence Download

description: A dataset containing 1462 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Vitis coignetiae Pulliat ex Planch.)",
 "HasCoordinate is true"
 ]
}

 The dataset includes 1462 records from 90 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0066782-240506114902167/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mzwhar
title: Occurrence Download

description: A dataset containing 16 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Murraya tetramera C.C.Huang"
 ]
}

 The dataset includes 16 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0248331-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.48
title: Hands on: ทำไมเห็นดวงอาทิตย์เป็นสีแดงตอนเช้าและเย็น (Physics is all around)
DOI: 10.15468/dl.7wyczj
title: Occurrence Download

description: A dataset containing 186 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Atelopus mindoensis Peters, 1973"
 ]
}

 The dataset includes 186 records from 13 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0252134-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.3cu7s3
title: Occurrence Download

description: A dataset containing 4 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Berberis lepidifolia Ahrendt",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 4 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0263117-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.49
title: Hands-on: ดึงธนบัตรบนปากขวด (Physics is all around)
DOI: 10.15468/dl.3rbfdk
title: Occurrence Download

description: A dataset containing 11666 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Stephania japonica (Thunb.) Miers"
 ]
}

 The dataset includes 11666 records from 149 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0248341-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.50
title: การทดลองเรื่อง โมเมนต์ความเฉื่อยของวัตถุ (Moment of Inertia)
DOI: 10.15468/dl.n2d27g
title: Occurrence Download

description: A dataset containing 67 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Pulicaria chrysantha (Diels) Y.Ling"
 ]
}

 The dataset includes 67 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0252135-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.9eqbhz
title: Occurrence Download

description: A dataset containing 48 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Berberis levis Franch.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 48 records from 11 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0263118-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.51
title: การประมาณค่าเชิงเส้น และค่าเชิงอนุพันธ์
DOI: 10.15468/dl.zj6exx
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Polypedilum tamaharaki Sasa, 1983",
 "HasCoordinate is true",
 "Country is Japan",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0218636-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.52
title: การหาจุดศูนย์กลางมวลของแผ่นครึ่งวงกลม
DOI: 10.12755/mwit.fas.2023.53
title: การหาสนามแม่เหล็กเนื่องจากลวดที่มีกระแสไฟฟ้าโดยใช้กฎของบิโอต์และซาวารต์ (The BiotSavart Law)
DOI: 10.15468/dl.nbrg5h
title: Occurrence Download

description: A dataset containing 24 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Aquila chrysaetos (Linnaeus, 1758)",
 "HasCoordinate is true",
 "Country is Norway",
 "DatasetKey is Norwegian Species Observation Service",
 "Year is 1990",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 24 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0252465-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mfqtrn
title: Occurrence Download

description: A dataset containing 12 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Berberis platyphylla (Ahrendt) Ahrendt",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 12 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0263128-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.54
title: การเปลี่ยนแปลงวัฒนธรรมสมัยอยุธยา
DOI: 10.15468/dl.ctybc9
title: Occurrence Download

description: A dataset containing 1910 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is one of (Stryphnodendron obovatum Benth., Stryphnodendron rotundifolium Mart., Stryphnodendron discolor Benth., Stryphnodendron goyazense Taub., Stryphnodendron rotundifolium f. retusa Chodat & Hassl., Stryphnodendron rotundifolium var. rotundifolium, Stryphnodendron rotundifolium var. villosum (Benth.) Scalon)"
 ]
}

 The dataset includes 1910 records from 122 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0254736-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.55
title: ครูน้า พาเที่ยว Ep.จิตรกรรมฝาผนัง
DOI: 10.15468/dl.wngb3n
title: Occurrence Download

description: A dataset containing 274330 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is iNaturalist Research-grade Observations",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Country is one of (Canada, Mexico, United States of America)",
 "EventDate is greater than or equal to 2022-11-23",
 "EventDate is less than or equal to 2022-12-23",
 {
 "not" : {
 "Issue" : [
 "is one of (Basis of record invalid, Coordinate reprojection failed, Coordinate reprojection suspicious, Coordinate precision invalid, Coordinate uncertainty meters invalid, Country mismatch, Country invalid, Geodetic datum invalid, Presumed swapped coordinate, Presumed negated longitude, Presumed negated latitude, Country coordinate mismatch)"
 ]
 }
 }
 ]
}

 The dataset includes 274330 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0252148-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.9a9tst
title: Occurrence Download

description: A dataset containing 16 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Berberis minutiflora C.K.Schneid.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 16 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0263120-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.56
title: ชาวต่างชาติในพระนครศรีอยุธยา
DOI: 10.15468/dl.tz2pms
title: Occurrence Download

description: A dataset listing the 2 species recorded in GBIF matching the query:
{
 "TaxonKey" : [
 "is Pterocryptis taytayensis (Herre, 1924)"
 ]
}

 The dataset's 2 records were derived from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0256650-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.57
title: ทฤษฎีบทสู่ส่วนกลาง
DOI: 10.15468/dl.eptscn
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Kohleria ×hansteinii (Ortgies) H.E.Moore"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001904-230530130749713/datasets/export for details.
DOI: 10.15468/dl.d8vjy4
title: Occurrence Download

description: A dataset containing 146733 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is iNaturalist Research-grade Observations",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Country is one of (Canada, Mexico, United States of America)",
 "EventDate is greater than or equal to 2022-12-24",
 "EventDate is less than or equal to 2023-01-23",
 {
 "not" : {
 "Issue" : [
 "is one of (Basis of record invalid, Coordinate reprojection failed, Coordinate reprojection suspicious, Coordinate precision invalid, Coordinate uncertainty meters invalid, Country mismatch, Country invalid, Geodetic datum invalid, Presumed swapped coordinate, Presumed negated longitude, Presumed negated latitude, Country coordinate mismatch)"
 ]
 }
 }
 ]
}

 The dataset includes 146733 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0252160-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.58
title: พอลิเมอร์
DOI: 10.15468/dl.9p46xn
title: Occurrence Download

description: A dataset containing 1637 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is one of (Sclerolobium aureum (Tul.) Baill., Sclerolobium aureum (Tul.) Benth., Sclerolobium aureum var. aureum, Tachigali aurea Tul.)"
 ]
}

 The dataset includes 1637 records from 106 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0254737-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.59
title: ระยะทางระหว่างจุดสองจุด
DOI: 10.15468/dl.m4pc7q
title: Occurrence Download

description: A dataset containing 3 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Berberis potaninii Maxim.",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 3 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0263130-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.60
title: ระยะห่างระหว่างจุดกับเส้นตรง
DOI: 10.15468/dl.a4wcan
title: Occurrence Download

description: A dataset containing 430 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Canada",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Bistorta vivipara (L.) Gray"
 ]
}

 The dataset includes 430 records from 6 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0252175-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.61
title: ระยะห่างระหว่างเส้นตรงสองเส้นที่ขนานกัน
DOI: 10.15468/dl.pzcpw5
title: Occurrence Download

description: A dataset containing 267835 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-163.88902 13.41211,-149.33369 13.41211,-149.33369 27.42793,-163.88902 27.42793,-163.88902 13.41211))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is one of (Argyroxiphium sandwicense DC., Plantae)"
 ]
}

 The dataset includes 267835 records from 204 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0254739-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.a748tv
title: Occurrence Download

description: A dataset containing 350 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "PublishingOrg is 28eb1a3f-1c15-4a95-931a-4af90ecb574d",
 "TaxonKey is Aloe striata Haw."
 ]
}

 The dataset includes 350 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0031235-230530130749713/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.adkywr
title: Occurrence Download

description: A dataset containing 931 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Canada",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Dryas octopetala L."
 ]
}

 The dataset includes 931 records from 31 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0252176-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.h6e8kz
title: Occurrence Download

description: A dataset listing the 1750 species recorded in GBIF matching the query:
{
 "and" : [
 "GadmGid is one of (GBR, IRL)",
 "OccurrenceStatus is Present",
 "TaxonKey is Bryophyta",
 "Year 1900-2023"
 ]
}

 The dataset's 1750 records were derived from 203 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0245527-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.khwgyf
title: Occurrence Download

description: A dataset containing 147 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "PublishingOrg is 28eb1a3f-1c15-4a95-931a-4af90ecb574d",
 "TaxonKey is Aloe broomii Schönland"
 ]
}

 The dataset includes 147 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0031236-230530130749713/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.12755/mwit.fas.2023.64
title: เทคนิคการหาอนุพันธ์ของฟังก์ชัน-อนุพันธ์ของฟังก์ชันเอกซ์โพเนนเชียลและฟังก์ชันลอการิทึม