8889841cAWSTATS DATA FILE 7.8 (build 20200416)
# If you remove this file, all statistics for date 202301 will be lost/reset.
# Last config file used to build this data file was /home/clixcotz/tmp/awstats/ssl/awstats.afritrack.clix.co.tz.conf.

# Position (offset in bytes) in this file for beginning of each section for
# direct I/O access. If you made changes somewhere in this file, you should
# also remove completely the MAP section (AWStats will rewrite it at next
# update).
BEGIN_MAP 28
POS_GENERAL 2021                
POS_TIME 2696                
POS_VISITOR 9172                
POS_DAY 11408               
POS_DOMAIN 3553                
POS_LOGIN 3918                
POS_ROBOT 4073                
POS_WORMS 4537                
POS_EMAILSENDER 4668                
POS_EMAILRECEIVER 4811                
POS_SESSION 12275               
POS_SIDER 12487               
POS_FILETYPES 4946                
POS_DOWNLOADS 5326                
POS_OS 6039                
POS_BROWSER 6232                
POS_SCREENSIZE 6597                
POS_UNKNOWNREFERER 6671                
POS_UNKNOWNREFERERBROWSER 7328                
POS_ORIGIN 7793                
POS_SEREFERRALS 7934                
POS_PAGEREFS 8093                
POS_SEARCHWORDS 8268                
POS_KEYWORDS 8420                
POS_MISC 2359                
POS_ERRORS 8479                
POS_CLUSTER 3774                
POS_SIDER_404 8617                
END_MAP

# LastLine    = Date of last record processed - Last record line number in last log - Last record offset in last log - Last record signature value
# FirstTime   = Date of first visit for history file
# LastTime    = Date of last visit for history file
# LastUpdate  = Date of last update - Nb of parsed records - Nb of parsed old records - Nb of parsed new records - Nb of parsed corrupted - Nb of parsed dropped
# TotalVisits = Number of visits
# TotalUnique = Number of unique visitors
# MonthHostsKnown   = Number of hosts known
# MonthHostsUnKnown = Number of hosts unknown
BEGIN_GENERAL 8
LastLine 20230201013512 3 494 17100199692549
FirstTime 20230101004009
LastTime 20230131212144
LastUpdate 20230201210753 3 0 2 0 0
TotalVisits 265                 
TotalUnique 42                  
MonthHostsKnown 0                   
MonthHostsUnknown 57                  
END_GENERAL

# Misc ID - Pages - Hits - Bandwidth
BEGIN_MISC 10
RealPlayerSupport 0 0 0
QuickTimeSupport 0 0 0
PDFSupport 0 0 0
TotalMisc 0 0 0
WindowsMediaPlayerSupport 0 0 0
JavaEnabled 0 0 0
JavascriptDisabled 0 0 0
DirectorSupport 0 0 0
FlashSupport 0 0 0
AddToFavourites 0 12 0
END_MISC

# Hour - Pages - Hits - Bandwidth - Not viewed Pages - Not viewed Hits - Not viewed Bandwidth
BEGIN_TIME 24
0 19 19 1563722 7 8 255451
1 6 6 310509 4 4 2864
2 13 21 1078752 6 8 187946
3 12 12 299332 10 10 3973
4 15 15 310509 14 14 262508
5 18 18 620950 14 15 283069
6 330 459 14711452 12 12 12787
7 28 100 91306870 12 13 127187
8 8 21 1576 4 4 162371
9 325 579 259896691 23 24 13695
10 126 756 355550168 12 20 618766
11 334 917 875487145 12 15 270013
12 254 1058 398316249 21 23 188648
13 345 1111 166662661 26 27 409087
14 193 576 145839874 23 26 21630
15 746 2034 775906068 27 29 61777
16 1042 2645 1202323403 28 31 962
17 235 746 402977010 8 10 218211
18 188 792 663222730 10 11 97247
19 87 174 494649359 7 7 4840
20 32 49 161405603 13 13 260827
21 425 572 10648941 12 16 164643
22 20 25 514379 28 28 79107
23 20 26 1128790 8 9 171571
END_TIME

# Domain - Pages - Hits - Bandwidth
# The 25 first Pages must be first (order not required for others)
BEGIN_DOMAIN 8
id 3227 9387 2694517040
gb 1164 1273 11693786
tz 292 1194 808578932
fr 75 126 5314214
us 38 657 51699099
ca 13 13 2035074
mu 8 65 26754891
be 4 16 813913
END_DOMAIN

# Cluster ID - Pages - Hits - Bandwidth
BEGIN_CLUSTER 0
END_CLUSTER

# Login - Pages - Hits - Bandwidth - Last visit
# The 10 first Pages must be first (order not required for others)
BEGIN_LOGIN 0
END_LOGIN

# Robot ID - Hits - Bandwidth - Last visit - Hits on robots.txt
# The 25 first Hits must be first (order not required for others)
BEGIN_ROBOT 8
bingbot/ 265 2642458 20230131212141 11
CFNetwork 4 29438 20230125125652 0
facebookexternalhit/ 3 31967 20230109101623 0
survey 2 203024 20230107225236 0
AdIdxBot/ 1 24873 20230102023328 0
no_user_agent 1 160843 20230110205251 0
(firefox/)([0-9]\.|[0-1][0]\.) 1 160843 20230113120835 0
bot[\s_+:,\.\;\/\\-] 1 160843 20230112054613 0
END_ROBOT

# Worm ID - Hits - Bandwidth - Last visit
# The 5 first Hits must be first (order not required for others)
BEGIN_WORMS 0
END_WORMS

# EMail - Hits - Bandwidth - Last visit
# The 20 first Hits must be first (order not required for others)
BEGIN_EMAILSENDER 0
END_EMAILSENDER

# EMail - Hits - Bandwidth - Last visit
# The 20 first hits must be first (order not required for others)
BEGIN_EMAILRECEIVER 0
END_EMAILRECEIVER

# Files type - Hits - Bandwidth - Bandwidth without compression - Bandwidth after compression
BEGIN_FILETYPES 15
svg 344 778482 0 0
mp4 13 2423325794 0 0
gif 6 45216 0 0
jpeg 153 12470412 0 0
php 3516 159556731 0 0
webp 25 75844 0 0
png 2698 449667925 0 0
jpg 1521 353648427 0 0
js 1903 53508221 0 0
woff 43 1554960 0 0
html 670 80683478 0 0
woff2 52 2265396 0 0
Unknown 529 18217270 0 0
css 1247 45127473 0 0
ttf 11 481320 0 0
END_FILETYPES

# Downloads - Hits - Bandwidth
BEGIN_DOWNLOADS 7
/wp-content/uploads/2023/01/Afritrack-Fleet-Monitoring-1920-%C3%97-1080-px.mp4 0 64 584020800
/wp-content/uploads/2022/12/Afritrack-SPM-Video-1920-%C3%97-1080-px-1.mp4 0 25 429769769
/wp-content/uploads/2023/01/Afritrack-Fleet-Monitoring-1920-%C3%97-1080-px-3.mp4 0 23 215326044
/wp-content/uploads/2022/12/Afritrack-Generator-Monitoring-Video-1920-%C3%97-1080-px-1.mp4 0 87 627106243
/wp-content/uploads/2023/01/Afritrack-Fleet-Monitoring-1920-%C3%97-1080-px-2.mp4 0 23 233462478
/wp-content/uploads/2023/01/Afritrack-Fleet-Monitoring-1920-%C3%97-1080-px-1.mp4 0 21 175104094
/wp-content/uploads/2023/01/Afritrack-Smart-Agri-1920-%C3%97-1080-px.mp4 0 20 158536366
END_DOWNLOADS

# OS ID - Hits
BEGIN_OS ID - Hits - Pages 9
winnt 1 1
win10 4842 1194
macosx15 5850 2371
Unknown 1309 1186
linux 631 30
android 98 5
ios_iphone 260 31
win7 2 2
macosx6 1 1
END_OS

# Browser ID - Hits - Pages
BEGIN_BROWSER 16
chrome95.0.4638.69 16 0
opera93.0.0.0 1912 750
chrome109.0.0.0 356 31
chrome106.0.5249.0 631 30
Unknown 1287 1178
chrome102.0.5005.125 98 5
mozilla 22 8
firefox23.0 1 1
safari16.1 5519 2363
msie9.0 1 1
safari16.2 169 14
safari15.6.3 285 19
opera94.0.0.0 116 6
safari5.0.3 1 1
chrome108.0.0.0 2579 413
msie10.0 1 1
END_BROWSER

# Screen size - Hits
BEGIN_SCREENSIZE 0
END_SCREENSIZE

# Unknown referer OS - Last visit date
BEGIN_UNKNOWNREFERER 5
WhatsApp/2.22.24.81_i 20230109101635
Expanse,_a_Palo_Alto_Networks_company,_searches_across_the_global_IPv4_space_multiple_times_per_day_to_identify_customers'_presences_on_the_Internet._If_you_would_like_to_be_excluded_from_our_scans,_please_send_IP_addresses/domains_to:_scaninfo@paloaltonetworks.com 20230122093635
WordPress/6.1.1;_https://afritrack.clix.co.tz 20230131212144
Mozilla/5.0_(compatible;_InternetMeasurement/1.0;__https://internet-measurement.com/) 20230128141311
Mozilla/5.0_(compatible;_CensysInspect/1.1;__https://about.censys.io/) 20230125161921
END_UNKNOWNREFERER

# Unknown referer Browser - Last visit date
BEGIN_UNKNOWNREFERERBROWSER 3
WhatsApp/2.22.24.81_i 20230109101635
WordPress/6.1.1;_https://afritrack.clix.co.tz 20230131212144
Expanse,_a_Palo_Alto_Networks_company,_searches_across_the_global_IPv4_space_multiple_times_per_day_to_identify_customers'_presences_on_the_Internet._If_you_would_like_to_be_excluded_from_our_scans,_please_send_IP_addresses/domains_to:_scaninfo@paloaltonetworks.com 20230122093635
END_UNKNOWNREFERERBROWSER

# Origin - Pages - Hits 
BEGIN_ORIGIN 6
From0 192 221
From1 0 0
From2 0 1
From3 4 4
From4 4625 12768
From5 0 0
END_ORIGIN

# Search engine referers ID - Pages - Hits
BEGIN_SEREFERRALS 1
google_com 0 1
END_SEREFERRALS

# External page referers - Pages - Hits
# The 25 first Pages must be first (order not required for others)
BEGIN_PAGEREFS 1
http://51.75.171.57:80 4 4
END_PAGEREFS

# Search keyphrases - Number of search
# The 10 first number of search must be first (order not required for others)
BEGIN_SEARCHWORDS 0
END_SEARCHWORDS

# Search keywords - Number of search
# The 25 first number of search must be first (order not required for others)
BEGIN_KEYWORDS 0
END_KEYWORDS

# Errors - Hits - Bandwidth
BEGIN_ERRORS 6
400 1 0
301 8 0
207 2 33096
404 8 361945
206 3 69850
302 65 0
END_ERRORS

# URL with 404 errors - Hits - Last URL referrer
BEGIN_SIDER_404 4
/apple-touch-icon.png 1 -
/apple-touch-icon-precomposed.png 1 -
/wp-admin/admin-ajax.php 1 https://afritrack.clix.co.tz/wp-admin/customize.php
/wp-content/plugins/stal-core/inc/icons/simple-line-icons/assets/css/simple-line-icons.min.css.map 5 -
END_SIDER_404

# Host - Pages - Hits - Bandwidth - Last visit date - [Start date of last visit] - [Last page of last visit]
# [Start date of last visit] and [Last page of last visit] are saved only if session is not finished
# The 25 first Hits must be first (order not required for others)
BEGIN_VISITOR 57
102.219.121.212 2500 8047 2149051569 20230131191517
51.75.171.57 1164 1273 11693786 20230131212144
102.219.122.79 644 968 59426238 20230112115215
196.41.57.190 137 686 528543958 20230131110029
102.177.87.7 77 416 473258170 20230118230817
77.111.247.8 75 126 5314214 20230110133415
197.250.224.241 69 167 39996769 20230107093702
197.250.227.67 43 92 59045192 20230110142909
197.250.197.254 21 197 97977268 20230109104547
41.222.181.32 13 91 48590873 20230106073941
196.200.229.186 8 67 26754891 20230114121923
41.222.177.238 7 37 34229668 20230107172030
102.217.80.6 6 137 12781063 20230115160216
34.249.156.220 6 122 9773128 20230104160143
3.252.155.85 6 129 10242437 20230126160206
34.247.68.250 6 129 10242437 20230113180150
54.154.123.101 6 129 10242437 20230129170202
34.255.119.168 6 122 9773128 20230101150138
167.248.133.62 2 10 388080 20230125161917
162.142.125.220 2 8 370832 20230123215431
54.171.26.181 2 2 310509 20230131183133
198.235.24.39 1 1 160843 20230113225809
41.222.179.243 1 3 194416 20230110115129
205.210.31.25 1 1 160843 20230118064518
205.210.31.152 1 1 160843 20230120223555
87.236.176.68 0 1 24880 
87.236.176.66 0 1 1230 
87.236.176.74 1 1 160843 20230116190505
54.217.178.104 1 1 149598 20230107194547
198.235.24.183 1 1 149666 20230103035005
87.236.176.239 1 1 160843 20230128141311
205.210.31.54 1 1 160843 20230115162026
87.236.176.159 0 1 24880 
205.210.31.50 1 1 160843 20230110192109
87.236.176.25 1 1 160843 20230114020205
87.236.176.86 0 1 1230 
104.248.203.191 0 1 14719 
87.236.176.32 0 1 1230 
87.236.176.182 0 1 16018 
87.236.176.212 0 1 16018 
198.235.24.185 1 1 160843 20230121054241
54.217.83.13 1 1 149666 20230104130600
206.189.7.178 0 1 1230 
87.236.176.246 1 2 175562 20230120022559
198.235.24.3 1 1 149666 20230101154429
87.236.176.98 0 1 16018 
198.235.24.175 1 1 160843 20230122093635
205.210.31.148 1 1 149666 20230101035304
165.22.39.64 0 1 16018 
198.235.24.22 1 1 160843 20230115000721
205.210.31.29 1 1 149666 20230101004006
87.236.176.175 0 1 24880 
87.236.176.166 0 1 14719 
87.236.176.186 0 1 14719 
198.235.24.139 1 1 149666 20230102015600
68.183.53.77 0 1 24880 
41.222.177.225 1 1 788 20230106170121
END_VISITOR

# Date - Pages - Hits - Bandwidth - Visits
BEGIN_DAY 30
20230101 437 694 20949429 12
20230102 587 953 200070859 14
20230103 27 71 80252196 12
20230104 102 532 187594505 11
20230105 49 112 368670850 6
20230106 591 1484 623986421 15
20230107 144 360 141299709 11
20230108 4 4 149598 1
20230109 1631 4519 2821124977 12
20230110 661 1888 903903135 17
20230111 35 126 111298202 11
20230112 76 217 94793714 6
20230113 19 157 10725754 10
20230114 22 83 53480475 7
20230115 25 156 13424435 8
20230116 32 146 130157627 7
20230117 24 24 321686 8
20230118 16 22 644160 7
20230119 26 26 805003 6
20230120 32 109 77036799 11
20230121 22 22 506788 5
20230122 24 24 482529 8
20230123 16 36 532463 9
20230124 20 20 321686 3
20230125 55 393 143639425 8
20230126 36 191 12643903 6
20230128 38 152 14546501 10
20230129 23 146 10403280 8
20230130 24 41 483317 7
20230131 23 23 483317 9
END_DAY

# Session range - Number of visits
BEGIN_SESSION 7
1h+ 33
0s-30s 122
15mn-30mn 26
5mn-15mn 25
2mn-5mn 20
30mn-1h 30
30s-2mn 9
END_SESSION

# URL - Pages - Bandwidth - Entry - Exit
# The 25 first Pages must be first (order not required for others)
BEGIN_SIDER 105
/wp-admin/admin-ajax.php 2254 51324496 6 24
/wp-cron.php 1056 0 153 134
/ 358 48129631 83 62
/index.php/wp-json/contact-form-7/v1/contact-forms/5/feedback/schema 126 37800 1 2
/index.php/wp-json/contact-form-7/v1/contact-forms/314/feedback/schema 125 29375 0 10
/index.php/work-afritrack/ 74 8264563 7 12
/wp-admin/post.php 73 61239985 1 0
/index.php/smart-properties/ 51 5523876 3 3
/index.php/fleet/ 49 5224246 3 5
/index.php/wp-json/wp/v2/widget-types/stal_core_separator/encode 40 194773 0 0
/wp-admin/edit.php 37 6623884 0 0
/wp-admin/async-upload.php 35 134325 0 0
/wp-content/plugins/stal-core/inc/icons/ionicons/assets/fonts/ionicons.woff2 26 1162788 0 0
/index.php/2022/12/30/plustronics-2/ 25 3077108 1 3
/index.php/resource/ 25 2492000 1 1
/index.php/wp-json/elementor/v1/globals 23 20332 0 0
/index.php/wp-json/wp/v2/widget-types/stal_core_icon/encode 22 9155622 0 0
/index.php/smart-agri/ 21 2325355 0 0
/wp-content/plugins/stal-core/inc/icons/elegant-icons/assets/fonts/ElegantIcons.woff 21 1145952 0 0
/index.php/about-afritrack/ 16 1745162 0 1
/wp-admin/load-styles.php 15 7135156 0 0
/wp-admin/load-scripts.php 15 2036510 0 0
/index.php/wp-json/wp/v2/widget-types/text/encode 15 14977 0 0
/wp-content/plugins/stal-core/inc/icons/dripicons/assets/fonts/dripicons-v2.woff 15 364056 0 2
/index.php/smart-agri-2/ 14 1513809 2 1
/wp-content/plugins/revslider/public/assets/fonts/material/MaterialIcons-Regular.woff2 2 98996 0 0
/index.php/wp-json/wp/v2/posts 1 35523 0 0
/index.php/wp-json/wp/v2/taxonomies/category 4 8276 0 0
/index.php/wp-json/wp/v2/widget-types/categories/encode 2 3470 0 0
/index.php/wp-json/wp/v2/categories 6 11217 0 0
/index.php/wp-json/wc-admin/marketing/knowledge-base 1 3478 0 0
/index.php/feed/ 6 115135 0 1
/wp-content/plugins/qi-addons-for-elementor/inc/admin/inc/admin-pages/assets/fonts/Heebo-Medium.ttf 4 240852 0 0
/index.php/wp-json/wp/v2/block-renderer/core/archives 1 173 0 0
/index.php/wp-json/batch/v1 1 693 0 0
/wp-admin/themes.php 2 249535 0 0
/index.php/wp-json/wp/v2/widget-types/custom_html/encode 6 52951 0 0
/wp-admin/widgets.php 1 16993789 0 0
/index.php/wp-json/wp/v2/widgets 1 4892429 0 0
/index.php/wp-json/wp/v2/types 1 4487 0 0
/wp-content/plugins/qode-framework/inc/common/assets/plugins/fonticonpicker/fonts/iconpicker.woff 1 3344 0 0
/wp-admin/customize.php 2 9214550 0 0
/wp-content/plugins/revslider/public/assets/fonts/revicons/revicons.woff 2 15072 0 0
/index.php/wp-json/wp/v2/widget-types/categories/render 1 49514 0 0
/wp-includes/js/tinymce/skins/lightgray/fonts/tinymce.woff 1 18824 0 0
/wp-content/plugins/stal-core/inc/icons/simple-line-icons/assets/fonts/Simple-Line-Icons.woff2 13 360768 0 2
/index.php/wp-json/wp/v2/widget-types/woocommerce_product_search/render 1 49668 0 0
/wp-content/plugins/elementor/assets/lib/eicons/fonts/eicons.woff2 3 184888 0 0
/index.php/wp-json/wp/v2/block-renderer/core/latest-comments 1 94 0 0
/index.php/wp-json/wp/v2/blocks 9 18 0 0
/index.php/wp-json/wp/v2/widget-types/custom_html/render 4 203725 0 0
/index.php/wp-json/wp/v2/widget-types/woocommerce_product_search/encode 1 1132 0 0
/index.php/wp-json/wp/v2/widget-types/text/render 7 343828 0 0
/index.php/wp-json/wp/v2/widget-types/stal_core_search_opener/encode 9 39975 0 0
/index.php/wp-json/elementor/v1/template-library/templates 4 908670 0 0
/index.php/wp-json/wp/v2/posts/7885/autosaves 1 17996 0 0
/index.php/wp-json/wp/v2/block-patterns/patterns 9 775458 0 0
/wp-content/plugins/qode-framework/inc/common/assets/fonts/Heebo-Medium.ttf 1 80284 0 0
/index.php/contact-us/ 5 443302 0 0
/index.php/wp-json/ 9 7632 0 0
/wp-content/plugins/stal-core/inc/icons/font-awesome/assets/webfonts/fa-solid-900.woff2 7 443112 0 0
/index.php/comments/feed/ 6 3830 1 0
/index.php/wp-json/wp/v2/users/me 2 9583 0 0
/index.php/wp-json/wp/v2/users 10 1497 0 0
/wp-content/plugins/stal-core/inc/icons/font-awesome/assets/webfonts/fa-regular-400.woff2 1 14844 0 0
/index.php/wp-json/wp/v2/widget-types/stal_core_blog_list/encode 3 119799 0 0
/index.php/wp-json/wp/v2/pages/6583 7 327017 0 0
/wp-content/plugins/qi-addons-for-elementor/inc/admin/inc/admin-pages/assets/fonts/Roboto-Regular.ttf 2 0 0 0
/index.php/wp-json/wp/v2/widget-types/nav_menu/encode 3 4801 0 0
/index.php/wp-json/wp/v2/widget-types/media_image/encode 4 23404 0 0
/index.php/wp-json/wp/v2/widget-types 2 37392 0 0
/index.php/wp-json/wp/v2/widget-types/media_image/render 2 99268 0 0
/index.php/wp-json/wp/v2/widget-types/woocommerce_product_categories/encode 1 4278 0 0
/index.php/wp-json/wp/v2/widget-types/stal_core_side_area_opener/encode 6 14217 0 0
/index.php/wp-json/wp/v2/themes 9 18819 0 0
/wp-admin/edit-tags.php 1 202292 0 0
/index.php/wp-json/wp/v2/media 2 23026 0 0
/index.php/wp-json/wp/v2/pages/6919 1 9755 0 0
/wp-admin/index.php 1 167046 0 0
/index.php/wp-json/wp/v2/widget-types/stal_core_woo_dropdown_cart/encode 1 1338 0 0
/index.php/wp-json/contact-form-7/v1/contact-forms/131/feedback/schema 6 1848 1 1
/index.php/wp-json/wp/v2/posts/7885 9 196984 0 0
/index.php/wp-json/wc-admin/options 2 89 0 0
/index.php/wp-json/wc-analytics/admin/notes 1 2 0 0
/wp-admin/ 11 1817829 0 0
/index.php/wp-json/wp/v2/widget-types/woocommerce_product_categories/render 1 49813 0 0
/wp-content/plugins/qode-framework/inc/common/assets/fonts/Heebo-Regular.ttf 1 80092 0 0
/index.php/wp-json/wp/v2/block-patterns/categories 9 2583 0 0
/wp-login.php 13 79299 2 0
/index.php/wp-json/wp/v2/widget-types/woocommerce_product_tag_cloud/render 1 50165 0 0
/index.php/wp-json/wp/v2/widget-types/woocommerce_price_filter/encode 1 467 0 0
/index.php/wp-json/wp/v2/widget-types/tag_cloud/render 1 49871 0 0
/index.php/wp-json/wp/v2/widget-types/tag_cloud/encode 2 6293 0 0
/index.php/wp-json/wp/v2/taxonomies 11 95487 0 0
/index.php/wp-json/wp/v2/widget-types/woocommerce_product_tag_cloud/encode 1 1650 0 0
/index.php/wp-json/wp/v2/widget-types/stal_core_blog_list/render 2 101762 0 0
/wp-content/plugins/stal-core/inc/icons/linea-icons/assets/fonts/arrows/fonts/linea-arrows-10.woff 2 7712 0 0
/index.php/wp-json/wc-admin/marketing/recommended 1 4170 0 0
/index.php/wp-json/wp/v2/pages/588 3 29265 0 0
/index.php/wp-json/wp/v2/widget-types/woocommerce_top_rated_products/render 1 53478 0 0
/wp-content/plugins/qi-addons-for-elementor/inc/admin/inc/admin-pages/assets/fonts/Heebo-Regular.ttf 3 80092 0 0
/wp-content/plugins/envato-market/fonts/envato-market.woff 1 0 0 0
/index.php/wp-json/wc-admin/onboarding/tasks 1 18225 0 0
/wp-admin/admin.php 11 4155864 0 0
/index.php/wp-json/wp/v2/widget-types/woocommerce_top_rated_products/encode 1 5270 0 0
END_SIDER