novichisela
Senin, 14 November 2011
Jumat, 11 November 2011
TIK
- PERANGKAT KERAS INTERNET
- Untuk mengakses internet, yang dibutuhkan :
- Komputer
- Hardware Modem
- Saluran Telepon
- 1. Komputer
- Komputer merupakan komponen utama untuk dapat mengkases internet. Spesifikasi komputer yang digunakan dalam koneksi internet sangat menentukan cepat atau lambatnya kinerja akses internet. semakin tinggi spesifikasi sebuah komputer, semakin cepat kinerja akses internet, begitu pula sebaliknya. Spesifikasi minimal sebuah komputer dalam akses internet antara lain sebagai berikut :
- a . Prosesor
- Merupakan otak dari komputer untuk menjalankan aplikasi-aplikasi dalam komputer. Processor minimal pentium III 500Mhz.
- b. RAM (Random Access Memory)
- Berfungsi sebagai media penyimpanan sementara. RAM minimal 64MB.
- c. Hard Disk
- Digunakan untuk media penyimpanan data secara magnetik. Harddisk minimal 10GB.
- d. VGA Card
- Merupakan perangkat keras untuk menampilakan gambar pada layar monitor. VGA card minimal 4MB.
- e. Monitor
- Merupakan perangkat output untuk menampilkan proses kerja dari komputer.
- 2. MODEM
- Modem berasal dari singkatan MOdulator DEModulator. Modulator merupakan bagian yang mengubah sinyal informasi kedalam sinyal pembawa (Carrier) dan siap untuk dikirimkan, sedangkan Demodulator adalah bagian yang memisahkan sinyal informasi (yang berisi data atau pesan) dari sinyal pembawa (carrier) yang diterima sehingga informasi tersebut dapat diterima dengan baik. Modem merupakan penggabungan kedua-duanya, artinya modem adalah alat komunikasi dua arah.
- Secara singkatnya, modem merupakan alat untuk mengubah sinyal digital komputer menjadi sinyal analog dan sebaliknya. Komputer yang melakukan koneksi dengan internet dihubungkan dengan saluran telpon melalui modem.
- Berdasarkan fungsinya modem dibagi menjadi tiga jenis. Antara lain:
- 1. Modem Dial Up
- Modem dial Up biasa digunakan oleh Personal Computer (PC) yang langsung dihubungkan melalui saluran telpon. Jenis modem dial up ada dua macam yaitu:
- Internal
- Modem Dial Up
- Eksternal
- Modem internal
- Merupakan modem yang dipasang dalam komputer terutama pada slot ekspansi yang tersedia dalam mainboard komputer. Rata-rata kecepatan modem internal untuk melakukan download adalah 56 Kbps.
- Adapun keuntungan menggunakan modem internal sebagai berikut. a) Lebih hemat tempat dan harga lebih ekonomis b) Tidak membutuhkan adaptor sehingga terkesan lebih ringkas tanpa ada banyak kabel. Sedangkan kelemahan modem internal sebagai berikut: a) Modem ini tidak memerlukan lampu indikator sehingga sulit untuk memantau status modem b) Modem ini tidak menggunakan sumber tegangan sendiri sehingga membutuhkan daya dari power supply. Hal ini mengakibatkan suhu dalam kotak CPU bertambah panas.
- Modem Eksternal
- Modem eksternal merupakan modem yang letaknya diluar CPU komputer. Modem ekternal dihubungkan ke komputer melalui port com atau USB. Pemasangan modem ini adalah dengan cara menghubungkan modem ke power dan menghubungkannya lagi ke adaptor lalu disambungkan kembali ke listrik.
- Keuntungan modem eksternal: a) Portabilitas yang cukup baik sehingga bisa pindah-pindah untuk digunakan pada komputer lain b) Dilengkapi lampu indikator sehingga mudah untuk memantau status dari modem. Kelemahan dari modem eksternal. a) harga lebih mahal dari pada modem internal b) membutuhkan tempat atau lokasi tersendiri untuk menaruh modem tersebut.
- 2. Modem Kabel
- Modem Kabel (Cable Modem), adalah perangkat keras yang menyambungkan PC dengan sambungan TV kabel. Jaringan TV kabel ini dapat dipakai untuk koneksi ke internet dengan kecepatan lebih tinggi dibandingkan dengan modem dialup atau modem ADSL, kecepatan modem kabel maksimum 27Mbps downstream (kecepatan download ke pengguna) dan 2,5Mbps upstream (kecepatan upload dari pengguna). Sebelum dapat terkoneksi dengan internet, maka pengguna diharuskan untuk melakukan pendaftaran kepada penyedia jasa TV kabel dan ISP (internet Service Provider).
- 3. Modem ADSL (asymmetric Digital Subscriber line)
- ADSL atau Asymmetric Digital Subscriber Line adalah salah satu bentuk dari teknologi DSL. Ciri khas ADSL adalah sifatnya yang asimetrik, yaitu bahwa data ditransferkan dalam kecepatan yang berbeda dari satu sisi ke sisi yang lain. Ide utama teknologi ADSL adalh untuk memecah sinyal line telpon menjadi dua bagian untuk suara dan data. Hal ini memungkinkan pengguna untuk melakuakn atau meneima panggilan telpon dan melakukan koneksi internet secara simultan tanpa saling menggangu.
- 3. Saluran Telepon
- Saluran telpon juga merupakan perangkat keras yang penting dan diperlukan untuk menghubungkan komputer dengan internet. Penggunaan saluran telpon ini juga diikuti dengan penggunan modem dial up. Selain saluran telpon, untuk melakukan akses internet juga bisa dilakukan dengan menggunakan TV kabel. Untuk bisa mengakses internet menggunakan jaringan TV kabel maka modem yang dipakai adalah modem kabel.
- PERANGKAT KERAS PENDUKUNG AKSES INTERNET
- Selain ketiga perangkat utama di atas (computer, modem, saluran telpon) terdapat juga beberapa perangkat keras pendukung akses internet. Antara lain :
- HUB/Switch
- Repeater
- Bridge
- Router
- 1. HUB/Switch
- Hub merupakan perangkat keras yang digunakan untuk menggabungkan beberapa computer. Hub menjadi saluran koneksi sentral untuk semua computer dalam jaringan. Hub dibedakan menjadi dua yaitu, active hub merupkan sebuah repeater elektrik yang dilenggkapi dengan 8 konektor yang berfungsi untuk membentuk sinyal digital yang dikirim dan menyesuaikan impedensinya untuk memelihara data sepanjang jalur yang dilaluinya, yang kedua adalah passive hub merupakan sebuah repeater elektrik yang memiliki 4 konektor yang berfungsi untuk menerima sinyal pada salah satu konektor dan meneruskannya pada tiga konektorlain.
- 2. Repeater
- Piranti yang digunakan untuk memperbaiki dan memperkuat sinyal atau isyarat yang dilewatinya.
- 3. Bridge
- Adalah jenis perangkat yang diperlukan jika dua buah jaringan bertipe sama (ataupun bertopologi berbeda) tetapi dikehendaki agarr lalu lintas lokal masing-masing jalur tidak saling mempengaruhi jalur yang lain.
- 4. Router
- Router merupakan perangkat yang berfungsi hamper sama dengan bridge. Namun perangkat ini punya keunggulan selain untuk menghubungkan dua buah LAN dengan tipe sama, router juga bisa untuk menghubungkjan dua buah LAN dengan tipe berbeda.
mulok
Pindang Ikan Selar
Posted by on Thursday, January 13, 2011 Under: Resep Ikan
Bahan :
- 10 ekor ikan selar ukuran sedang
- Minyak jagung untuk menggoreng ikan
Bumbu :
- 3 siung bawang putih, iris
- 5 siung bawang merah, iris
- 5 buah cabe keriting, iris
- 1 cm jahe, memarkan
- 2 cm kunyit, iris sebesar korek api
- 1 cm lengkuas, memarkan
- 2 lbr daun salam
- 3 lbr daun jeruk
- 1 batang sereh, memarkan
- 1 buah tomat, iris
- 2 sdm gula merah, disisir
- 2 sdm kecap manis
- Garam dan merica bubuk secukupnya
- Air sedikit
Cara Membuatnya :
1. Goreng ikan selar sampai garing atau sesuai selera.
2. Panaskan minyak jagung, tumis bawang putih, bawang merah hingga harum. Masukkan irisan kunyit, cabe keriting, jahe,
lengkuas dan sereh. Aduk sebentar, lalu tambahkan sedikit air. Tambahkan gula merah, kecap manis, daun salam,
daun jeruk, garam dan merica bubuk secukupnya.
3. Setelah air bumbu mendidih, masukkan ikan selar goreng dan segera matikan api. Aduk hingga bumbu
merata. Ikan selar siap dihidangkan.
bahasa inggris
Past tense
From Wikipedia, the free encyclopedia
For other uses, see past tense (disambiguation)
The past tense (abbreviated pst) is a grammatical tense that places an action or situation in the past of the current moment (in an absolute tense system), or prior to some specified time that may be in the speaker's past, present, or future (in a relative tense system).[1] Not all languages mark verbs for the past tense (Mandarin Chinese, for example, does not); in some languages, the grammatical expression of past tense is combined with the expression of mood and/or aspect (see tense–aspect–mood). Some languages that mark for past tense do so by inflecting the verb, while others do so by using auxiliary verbs (and some do both). Contents[hide] |
[edit] European languages
[edit] Germanic languages
The European continent is heavily dominated by Indo-European languages, all of which have a past tense. In some cases the tense is formed inflectionally as in English see/saw or walk/walked and as in the French imperfect form, and sometimes it is formed periphrastically, as in the French passé composé form. Further, all of the non-Indo-European languages in Europe, such as Basque, Hungarian, and Finnish, also have a past tense.[edit] English
In English, the so-called simple past form, sometimes called the preterite, is a true tense in that its use always places the action in the past.[1] The present perfect form is an aspect that relates the past to the present; it specifies a present state that results from past action, and as such it is a form of present tense even though it makes reference to past action.[2] It can be altered to move the time that the state is experienced to the past. The other basic form of English verbs is the progressive aspect form, which shows ongoing action; this too can be altered to place the action in the past. English also has two forms, one of them unique to the past, that indicate past habitual action.- The simple past is formed for regular verbs by adding -d or – ed to the root of a word. Examples: He walked to the store, or They danced all night. A negation is produced by adding did not and putting the verb in its infinitive form. Example: He did not walk to the store. Question sentences are started with did as in Did he walk to the store? The simple past is used for describing acts that have already been concluded, regardless of whether they took place habitually or are viewed as a single occurrence seen as a unit (but not if they are viewed as having occurred continuously). It is commonly used in storytelling.
- The past progressive is formed by using a simple past form of to be (was or were) and the main verb’s present participle: He was going to church. This form indicates that an action was continuously ongoing. By inserting not before the main verb a negation is achieved. Example: He was not going to church. A question is formed by fronting the simple past form of to be as in Was he going?.
- The past habitual can be formed in one of two ways. One construction is formed by used to plus the bare form of the main verb (or, technically and equivalently, by used plus the to-infinitive of the main verb). With an action verb it indicates that something occurred repetitively, as in I used to go there, while with a stative verb it indicates that a state was continuously in effect, as in I used to belong to that club. The used to form can be used whether or not the specific time frame of the action is specified (I used to go there; I used to go there every Friday in June). The negation of this form is exemplified by I used not to go there, although in informal usage I didn't use to go there is frequently heard. The interrogative form Used you to go there? is rare; the informal alternative Did you use to go there? is sometimes heard.
- The other past habitual form uses the auxiliary verb would (which has other uses as well). For example, Last June I would go there daily conveys repetitive action. When this form is used, it must be accompanied by an explicit time frame (so for example I would go there. does not occur unless the time frame has already been specified). This form is negated as in Last June I would not go there daily, and it is made interrogative as in Last June, would you go there daily?.
- The past perfect is formed by combining the simple past form of to have with the past participle form of the main verb: We had shouted. This form conveys that an action occurred before a specified time in the past, so it is actually a "past of the past" tense. A negation is achieved by including not after had: You had not spoken. Questions in past perfect always start with had: Had he laughed?
- The past perfect progressive is formed by had (the simple past of to have), been (the past participle of to be) and the present participle of the main verb: You had been waiting. This form describes action which happened in continuous fashion prior to some time in the past. For negation, not is included before been: I had not been waiting. A question sentence is formed by starting with had: Had she been waiting? If emphasis is put on the duration of an action that continued to the reference time in the past, since and for are signal words for the past perfect progressive: We had been waiting at the airport since the 9 P.M. flight; We had been waiting there for three hours.
[edit] German
German uses two forms for the past tense.- The preterite (Präteritum) (called the "imperfect" in older grammar books, but this, a borrowing from Latin terminology, ill describes it.)
- The perfect (Perfekt)
In certain regions, a few specific verbs are used in the preterite, for instance the modal verbs and the verbs haben (have) and sein (be).
- Es gab einmal ein kleines Mädchen, das Rotkäppchen hieß. (There was once a small girl who was called Little Red Riding Hood.)
However, in the colloquial language of North Germany, there is still a very important difference between the preterite and the perfect, and both tenses are consequently very common. The preterite is used for past actions when the focus is on the action, whilst the present perfect is used for past actions when the focus is on the present state of the subject as a result of a previous action. This is somewhat similar to the English usage of the preterite and the present perfect.
- Preterite: "Heute früh kam mein Freund." (my friend came early in the morning, and he is being talked about strictly in the past)
- Perfect: "Heute früh ist mein Freund gekommen." (my friend came early in the morning, but he is being talked about in the present)
[edit] Dutch
Dutch also has 2 main past tenses:- onvoltooid verleden tijd, which matches the English simple past and the German preterite, for example: Gisteren was ik daar ("I was there yesterday").
- voltooid tegenwoordige tijd, a present tense with the meaning of perfect. This form is made by combining a form of zijn ("to be") or hebben ("to have") with the notional verb, for example: Gisteren ben ik daar geweest. This also means "I was there yesterday", but just as it is the case for English constructions with the present perfect simple, this kind of formulation puts more emphasis on the "being finished"-aspect.
[edit] Non-Germanic Indo-European languages
In non-Germanic Indo-European languages, past marking is typically combined with a distinction between perfective and imperfective aspect, with the former reserved for single completed actions in the past. French for instance, has an imperfect tense form similar to that of German but used only for past habitual or past progressive contexts like "I used to..." or "I was doing...". Similar patterns extend across most languages of the Indo-European family right through to the Indic languages.Unlike other Indo-European languages, in Slavic languages tense is independent of aspect, with imperfective and perfective aspects being indicated instead by means of prefixes, stem changes, or suppletion. In many West Slavic and East Slavic languages, the early Slavic past tenses have largely merged into a single past tense. In both West and East Slavic, verbs in the past tense are conjugated for gender (masculine, feminine, neuter) and number (singular, plural).
[edit] French
French has numerous forms of the past tense including but not limited to:- Past perfective (passé composé) e.g. J'ai mangé (I ate, using the form but not the meaning of I have eaten)
- Past imperfective (imparfait) e.g. Je mangeais (I was eating)
- Past historic or Simple past (passé simple) e.g. Je mangeai (I ate) (literary only)
- Pluperfect (Plus que parfait) e.g. J'avais mangé (I had eaten [before another event in the past])
- Recent past (passé recent) e.g. Je viens de manger (I just ate)
[edit] African languages
Whilst in Semitic languages tripartite non-past/past imperfective/past perfective systems similar to those of most Indo-European languages are found, in the rest of Africa past tenses have very different forms from those found in European languages. Berber languages have only the perfective/imperfective distinction and lack a past imperfect.Many non-Bantu Niger–Congo languages of West Africa do not mark past tense at all but instead have a form of perfect derived from a word meaning "to finish". Others, such as Ewe, distinguish only between future and non-future.
In complete contrast, Bantu languages such as Zulu have not only a past tense, but also a less remote proximal tense which is used for very recent past events and is never interchangeable with the ordinary past form. These languages also differ substantially from European languages in coding tense with prefixes instead of such suffixes as English -ed.
Other, smaller language families of Africa follow quite regional patterns. Thus the Sudanic languages of East Africa and adjacent Afro-Asiatic families are part of the same area with inflectional past-marking that extends into Europe, whereas more westerly Nilo-Saharan languages often do not have past tense.
[edit] Asian languages
Past tenses are found in a variety of Asian languages. These include the Indo-European languages Russian in North Asia and Persian, Tajik, Urdu, and Hindi in Southwest and South Asia; the Turkic languages Turkish, Turkmen, Kazakh, and Uyghur of Southwest and Central Asia; Arabic in Southwest Asia; Japanese; the Dravidian languages of India; the Uralic languages of Russia; Mongolic; and Korean. Languages in East Asia and Southeast Asia typically do not distinguish tense; in Mandarin Chinese, for example, the particle 了le when used immediately after a verb instead indicates perfective aspect.In parts of islands in Southeast Asia, even less distinction is made, for instance in Indonesian and some other Austronesian languages. Past tenses, do, however, exist in most Oceanic languages.
[edit] The Americas
Among Native American languages there is a split between complete absence of past marking (especially common in Mesoamerica and the Pacific Northwest) and very complex tense marking with numerous specialised remoteness distinctions, as found for instance in Athabaskan languages and a few languages of the Amazon Basin. Some of these tenses can have specialised mythological significance and uses.A number of Native American languages like Northern Paiute stand in contrast to European notions of tense because they always use relative tense, which means time relative to a reference point that may not coincide with the time an utterance is made.
[edit] New Guinea
Papuan languages of New Guinea almost always have remoteness distinctions in the past tense (though none are as elaborate as some native American languages), whilst indigenous Australian languages usually have a single past tense without remoteness distinctions.[edit] Creole languages
Creole languages tend to make tense marking optional, and when tense is marked invariant pre-verbal markers are used.[3][edit] Belizean Creole
In Belizean Creole, past tense marking is optional and is rarely used if a semantic temporal marker such as yestudeh "yesterday" is present.[edit] Singaporean English Creole
Singaporean English Creole (Singlish) optionally marks the past tense, most often in irregular verbs (e.g., go → went) and regular verbs like accept which require an extra syllable for the past tense suffix -ed.[edit] Hawaiian Creole English
Hawaiian Creole English[4] optionally marks the past tense with the invariant pre-verbal marker wen or bin (especially older speakers) or haed (especially on the island Kauai). (Ai wen si om "I saw him"; Ai bin klin ap mai ples for da halade "I cleaned up my place for the holiday"; De haed plei BYU laes wik "They played BYU last week"). The past habitual marker is yustu (Yo mada yustu tink so "Your mother used to think so").elektronika
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If a picture is worth 1024 words, how many words if it moves? | ||
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A NPN transistor connected as a common emitter amplifier: the base needs current to do its thing. The collector cannot output voltage, it can only cause more or less current to be drawn through its load resistor. If a voltage is applied to the base resistor a current now flows into the base (base emitter junction). If a resistor is connected between the collector and a positive supply voltage: the collector current flowing through the collector or load resistor causes a voltage to be dropped across said load resistor. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Diodes as Transistor We can simulate a NPN transistor using two diodes and connecting both anodes together. One cathode is tied to common (the emitter); the other cathode (the collector) goes to a load resistor tied to the positive supply. Now connect a 1k resistor to the junction of the two anodes (the base), and using a signal generator, apply a 0 to 2 volt P-P sine wave to the other end. Using a dual beam oscilloscope, observe the signal at both ends of the resistor, i.e., the generator and the "base."
Conversely, when the voltage at the generator goes less positive; the base current decreases; the collector current decreases; the voltage drop across the collector resistor decreases; and the voltage at the collector goes more positive or higher. Feel better now OK, So I Lied: There is just a little more to the story. Remember when the base reached ~0.6 volts? well the collector output is only that part of the signal that caused the base to conduct current. In other words: until the base rises to ~ 0.6 volts and there is base current, there is no change at the collector--no collector output. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Make a List The following list of attributes may, at first glance, seem confusing and contradictory, however they are all true and are offered as clues to the puzzle of: 'how does a transistor really work?' Abstractly, here are some Characteristics: 1. An equivalent circuit of a NPN transistor is two diodes tied anode to anode; one cathode being the emitter, the other the collector, and the junction of the anodes is the base. 2. When a NPN transistor is doing-its-thing, there is always a constant 0.6 volt drop between the base and emitter, i.e., the base is always ~ 0.6 volts more positive than the emitter--always! 3. There is no output at the collector, until the base has reached ~ 0.6 volts and the base is drawing current, i.e., any signal that appears at the base that is not up to ~ 0.6 volts (and not drawing base current), is never seen at the collector. 4. The base requires a current, not a voltage to control the collector current. 5. The collector is a current source: it does not source a voltage. 6. The collector appears to output a voltage when a resistor is connected between it and power. 7. The collector is a high impedance when compared to the emitter. 8. The transistor can output an amplified signal either from the collector or the emitter (or both). 9. When operating with a collector resistor (RL): the output voltage from the collector is an amplified voltage. 10. When operating with only an emitter resistor (Re): the output voltage from the emitter is not an amplified voltage, because it is always ~ 0.6 volts, below the input (base) voltage--hence the name voltage follower. But because the emitter can source large amounts of current to the "LOAD," it can be said, there was CURRENT amplification. 11. The collector--being high impedance--cannot drive a low impedance load. 12. The emitter--being a low impedance--can drive a low impedance load. 13. The voltage gain from the collector is greater than one (Gv > 1). 14. The voltage gain from the emitter is less than one (Gv < 1). 15. Both the collector and the emitter: output ~ the same power: E x I = P. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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