Table of Contents

Gasar a kan ciyawa, datti, ko kuma farfajiyar roba tana canza mahimman motsin zuciyar wasanni. Farfajiyar wasa ba ta da tsaka tsaki; tana ba da umarnin saurin ƙwallon ƙafa, tsayin tsalle, jan hankali, da kuma yanke shawara na dabarun da 'yan wasa da masu horarwa suka yanke. Hukumomin masu kula da tsarin suna tsara ka'idoji na musamman na ƙasa don tabbatar da adalci, aminci, da daidaito, duk da haka yawancin 'yan wasa da masu kallo suna fahimtar waɗannan ƙa'idodin ba daidai ba. Jagorancin waɗannan ƙa'idodin yana da mahimmanci ga duk wanda ke neman ƙwarewar gasa ko zurfin godiya ga wasanni kamar wasan tennis, ƙwallon ƙafa, ƙwallon ƙafa, wasan baseball, golf, da wasan hockey na filin. Wannan jagorar yana faɗaɗa kan ka'idoji daban-daban, daidaita kayan aiki, da sauye-sauye na dabaru da ake buƙata don kowane nau'in farfaji, yana haɗa da fahimta daga littattafan ƙa'idodi na hukuma da bincike na wasan kwaikwayon.

Ƙungiyoyin Ƙungiyoyi na Ƙasa

Ko da yake akwai daruruwan maganganun farfajiya, manyan nau'i uku sun bayyana yawancin wasanni na sana'a da masu sha'awar:

  • Grass na halitta: Grass na halitta wanda aka yi girma daga tsaba ko sod, ana amfani dashi a wasan tennis (Wimbledon), ƙwallon ƙafa (mafi yawan wasannin da FIFA ta amince da su), golf (fairways da kore), wasan kwallon kafa, da kwallon kafa na Amurka. Grass yana ba da taushi, mai canzawa farfajiyar da ke canzawa tare da yanayi da lalacewa.
  • Dirt da Clay: [1] Ya ƙunshi murƙushe dutse, tubali, ko ƙura. Wannan rukunin ya haɗa da filayen wasan tennis na yumbu (Roland Garros), filayen wasan ƙwallon ƙafa, yawancin filayen wasan motsa jiki, da bunkers na golf.
  • Fiber na roba (polyethylene, polypropylene, nylon) tare da kayan cika (ƙwayoyin roba, yashi, cork). Fuskokin roba suna bayyana a wasan hockey na filin, filayen motsa jiki da yawa, da kuma wuraren horo da yawa. Suna ba da daidaito a duk yanayin amma suna haifar da ƙalubale na musamman na zafi da karfin gwiwa.

Kowane farfajiyar tana canza manyan masu canji ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙ

Dokokin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yanayin Yan

Gwanayen Gwanaye

Gidajen daji suna ba da ƙwallon ƙafa mai sauri, mai ƙarancin tsalle da filin wasa mai santsi, musamman lokacin da yake da danshi. A wasan tennis, kotunan ciyawa suna ƙarfafa gajeren taro, dabaru na hidima da wasan motsa jiki, da ƙananan hanyoyin shiga. Dokokin Tennis na ITF ba su ba da takamaiman irin ciyawa, amma dokokin gasar galibi suna ba da umurni ga ƙarancin ƙarancin ƙarancin ƙarancin ciyawa kamar ciyawa.

Dokokin kwallon kafa akan ciyawa suna ƙarƙashin Dokokin FIFA na Wasanni. Waɗannan sun ƙayyade cewa farfajiya dole ne ta kasance mai launin kore da na halitta, tare da tsayin ciyawa a tsakanin 2530 mm don daidaita saurin da aminci. Alƙalai suna bincika filin kafin farawa kuma suna iya jinkirta wasan idan ciyawa ta cika da ruwa, daskarewa, ko rashin daidaito. Tsawon tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin tsayin

A wasan golf, Dokokin Golf na USGA suna tsara yanayin ciyawa sosai. A kan kore, mai kunnawa na iya gyara tsoffin ramuka, alamun ƙwallon ƙafa, da lalacewar da kayan aikin suka haifar, amma ba za su iya gwada farfajiya ta hanyar mirgine ƙwallon ƙafa ko taɓa layin putt ba. A kan fairways, inganta ɗayan ta hanyar latsawa baya da ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙwallon ƙw

Ka'idojin aminci a kan ciyawa sun shafi yanayin filin wasa. Idan ƙasa ta zama mai laushi, jami'ai na iya yin amfani da sakin layi na surface mai haɗari, dakatar da wasa har sai yanayin ya inganta.

Ƙazanta da Ƙafafun Gilashi

Kotunan wasan tennis na laka suna nuna ƙa'idodin ƙasa. Fuskar tana da jinkiri, yana haifar da tsalle mai girma wanda ke ba da lada ga rallies da saman saman. Dokar da ta fi dacewa ita ce tsarin nazarin alamar ƙwallon ƙafa: duk wani kiran layi da ake jayayya yana buƙatar alkalin wasa ya bincika ƙirar da aka bari ta ƙwallon ƙafa.

Ƙananan filayen wasan ƙwallon ƙafa sun fi yawa kuma ana bin ƙa'idodin MLB ko NCAA na musamman. Yanayin ƙwallon ƙafa yana tasiri kai tsaye ga ƙwallon ƙafa: masu kula da ƙasa suna shayar da filin kafin wasanni don hana zamewa, amma yawan danshi yana haifar da laka wanda zai iya haifar da kurakurai. Dokar ƙwallon ƙafa ba ta da takamaiman ƙasa, amma aikace-aikacenta ya fi mahimmanci a kan ƙwallon ƙafa saboda mummunan ƙwallon ƙafa na iya cutar da masu yin wasa. Dokokin ƙwallon ƙafa suna ba wa 'yan wasa damar amfani da rosin ko ƙwallon ƙafa a hannayensu don kamawa, amma ba za su iya amfani da wani abu baƙo ga ƙwallon ba. Ana ba da izinin ƙwallon ƙafa a mafi yawan matakan ƙwararru, kodayake ƙungiyoyin matasa galibi suna ba da izinin roba mai ƙira saboda haɗarin rauni daga gefuna masu kaifi.

Don golf, bunkers cike da yashi ana rarraba su azaman haɗari. [[R&A]] da USGA Dokokin Golf sun hana mai kunnawa taɓa yashi da kulob kafin bugun jini (ƙasa kulob din). Wannan ƙa'idar tana amfani da shi ba tare da la'akari da ko bunker ya ƙunshi yashi, datti, ko ƙura ba. Duk da haka, idan an wanke bunker da ruwan sama ko dabbobi suka lalata shi, mai kunnawa zai iya ɗaukar taimako kyauta ba tare da hukunci ba. Ana kuma ba wa 'yan wasa damar shimfiɗa ƙafafun ƙafafun ƙafa ko tsofaffin sawun ƙafa kafin wasa, idan ba su gwada ƙirar farfajiya ta hanyar da ke ba da fa'ida ba.

Takalma a kan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan ƙananan

Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙ

Gidan wasan roba yana ba da daidaitattun yanayi na yanayi wanda ke rage farashin kulawa amma yana gabatar da sababbin ka'idoji. A cikin kwallon kafa, shirin ingancin FIFA don Gidan wasan kwallon kafa na FLT:2 ya tabbatar da farfajiya bisa ga shawo kan damuwa, gyare-gyare, da sake dawo da ƙwallon ƙafa. Wasu wasannin gida har yanzu suna ba da izinin ciyawa ta halitta, amma yawanci suna ba da izinin ciyawa ta wucin gadi. Dokokin da suka shafi zafi sun bambanta da farfajiya na roba: idan yanayin zafin jiki ya wuce 120 ° F (49 ° C), jami'ai na iya kiran hutu na sanyaya ko ma jinkirta wasanni. Ana buƙatar 'yan wasa su sa kayan kwalliya na roba.

Wasan tennis mai wuya (acrylic a kan asphalt ko kankare) shine mafi yawan farfajiyar roba. Suna samar da matsakaici, tsalle mai tsinkaye. Layin kira ya dogara ne gaba ɗaya akan tsarin lantarki ko hukuncin mutum saboda ƙwallon ba ya barin alama mai ganuwa. Wasu gasa, musamman a kan yawon shakatawa na ATP, sun yi gwaji tare da kawar da dokar barin a kan filayen wuya don hanzarta wasa, kodayake wannan ba tsari ne na duniya ba. Wasanni masu wuya suna ƙarƙashin tsananin buƙatun faifai don kula da lalacewar ƙwallon ƙafa.

Wasan wasan hockey ya rungumi ciyawar roba. Dokokin Hukumar Hockey ta Duniya (FIH) na International Hockey Federation (FLT: 1) sun umurci cewa filin wasa ya kasance mai ruwa ko yashi. Rufin ruwa yana buƙatar ruwa mai ɗorewa don rage rigakafi da kiyaye ƙwallon motsawa cikin sauƙi; 'yan wasa ba za su iya yin amfani da filin a hankali ba yayin wasa, amma ana ba da izinin lokaci don kiyayewa. A cikin yashi mai yashi, ƙwallon yana motsawa a hankali, yana buƙatar ƙa'idodin kula da sanda masu tsauri don hana ɗagawa mai haɗari. Dole ne ƙwallon kanta ta yi nauyi tsakanin 156 162 grams, kuma launi na filin dole ne ya kasance kore ko shuɗi (don bambanta da ƙwallon).

Dokokin aminci akan farfajiyar roba sun shafi matakai da zafi. Yawancin wasannin kwallon kafa na matasa sun ɗauki iyakokin maye gurbin da ke ba da izinin hutu mafi yawa a ranakun zafi don hana ƙarancin zafi. Hakanan tsalle mai ɗorewa na filayen roba yana rage haɗarin tsalle ƙwallon ƙafa mara tsayi, amma ƙasa mai wuya tana ƙara haɗarin raunin haɗin gwiwa.

Daidaita kayan aiki da dabarun a fadin surface

Mafi ganuwa a cikin kayan aiki na saman da aka yi amfani da su shine takalma. Don wasan tennis, ITF ta rarraba ƙirar takalma na waje: takalma na filin wasa suna da ƙananan pimples ko gajeren studs don riƙe ciyawa mai laushi; takalma na filin wasa na yumbu suna amfani da hanyar sheƙa mai tsayayya da clogging; takalma na filin wasa mai wuya suna da kwance, mai ɗorewa da aka inganta don juriya ta lalata. A wasan ƙwallon ƙafa, IFAB (International Football Association Board) yana ba da izinin kowane nau'in stud idan ba shi da haɗari, amma alƙalai suna bincika takalma kafin kickoff.

Ƙwallon ƙafa kuma sun bambanta bisa ga farfajiya. A wasan golf, masana'antun suna samar da ƙwallon ƙafa tare da ƙimar matsawa daban-daban: ƙwallon ƙwallon ƙwallon ƙafa masu ƙwanƙwasawa sun dace da fairways masu laushi, yayin da ƙwallon ƙwallon ƙafa masu ƙwanƙwasawa ke ba da nesa mafi kyau a kan datti mai ƙarfi. Dokokin gasa galibi suna ƙayyade samfurin ƙwallon don tabbatar da daidaito. Ƙwallon ƙwallon Tennis don yumɓu suna da aikin yau da kullun tare da jinƙai mai laushi wanda ke ɗaukar ƙarancin danshi, yayin da ƙwallon ƙwallon ciyawa suna da ƙarin aikin tare da jinƙai mai kauri don tsayayya da zamewa. Ƙwallon ƙwallon ƙafa da aka yi amfani da su a kan turf ɗin roba na iya samun ɗan ƙirar daban don ragewa, kodayake takardar shaidar FIFA tana buƙatar daidaitaccen aiki.

A cikin filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen filayen fila

Kulawa, La'akari da Muhalli, da Dokokin Tsaro

Dokokin kula da ƙasa suna da mahimmanci kamar dokokin wasa. Filin ciyawar yana buƙatar yanka a cikin tsari mai juyawa don hana hatsi, iska don rage matsi, da kuma yawan takin gargajiya. Alkali yana da ikon ƙarshe don ɗaukar ƙasa mai laushi saboda sanyi, ruwa, ko mummunan ruwa. Ana jan ƙurar ƙurar ƙwallon baseball da aka yi a tsakanin wasannin don kiyaye daidaito; an tilasta tsayin daka na pitcher (inci 10 a saman farantin gida a MLB) an tilasta shi sosai. Ana goge gashin tennis na laka da kuma shayar da shi kowace rana; an hana 'yan wasa yin amfani da ƙasa da gangan (misali, goge laka tare da takalma) sai dai a wurare masu santsi kusa da raga.

Dokokin muhalli musamman suna niyya ne ga farfajiyar roba. Saboda ciyawa ta wucin gadi na iya sha da kuma fitar da zafi, hukumomi da yawa sun ɗauki manufofin farfajiyar zafi wanda ke ba da umarnin lura da zafin jiki. Idan farfajiyar ta wuce ƙofar (yawanci 120 ° F), ana jinkirta wasanni ko buƙatar hutu na sanyaya. Ƙungiyar Wasannin Wasannin Kwallon Kafa ta Kasa ta NFLT:2 (misali ƙungiya) ta aiwatar da ruwan hutu na tilas a kowane minti 20 na wasa a kan farfajiyar wucin gadi lokacin da yanayin yanayin yanayin yanayin zafi ya yi tsanani. Bugu da ƙari, ciyawa ta wucin gadi na wucin gadi yana buƙatar tsaftacewa da maye gurbin cikawa don kula da gazawar sha'awa don yin hakan na iya haifar da farfajiyar ƙasa ta zama mai haɗari.

Saituna da kuma yankuna bambance-bambancen ma rinjayar da iko. A cikin sanyi yanayi, ciyawa filayen iya zama sanyi, wanda ke haifar da dacewar jinkirta. A kan laka, ruwan sama mai yawa zai iya sa surface zama unplayable. A gasa sau da yawa da Dry Time dokoki da suka ƙayyade tsawon lokacin da jami'an dole ne jira bayan ruwan sama. roba surfaces wuya zama waterlogged, amma tsaye ruwa zai iya haifar da zamewa hadarin.

Ƙarshen

Hadin kai tsakanin farfajiyar wasa da tsari yana daya daga cikin mafi yawan abubuwan da ake gani a wasanni na gasa. Ko kuna zamewa cikin layin asali, kuna tsalle a kan filayen ciyawa mai laushi, ko kuma kuna juyawa a filin wucin gadi, ƙa'idodin da ke kula da kai tsaye suna tsara motsin ku, kayan aiki, da dabarun ku. Fahimtar waɗannan ƙa'idodin takamaiman ƙasa - daga ƙuntatawa na tsayin tsayin tsayi zuwa ga ladabi na ƙwallo - yana bawa 'yan wasa damar daidaitawa da sauri, guje wa azabar kisa, da rage haɗarin rauni. Jami'ai suna amfana daga ƙwarewar ilimin ƙa'idodin farfajiyar ƙasa don aiwatar da wasan gaskiya. Yayin da fasahar kere-kere ke ci gaba da haɓaka da canjin yanayi, za mu iya tsammanin ƙarin ƙwarewa a cikin ƙa'idodin takamaiman ƙasa. A yanzu, sarrafa ƙasa a ƙarƙashin ƙafafunku galibi ya kasance mai mahimmanci, ƙarancin fa'ida, da ke da ƙimar gasa.