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C2 5/4/21
Quiz by ANGIE PITS
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The expression 2 + 4 1 + 2 is equal to (A) 0 (B) 1 (C) 2 (D) 4 (E) 5 2. The ones (units) digit of 542 is 2. When 542 is multiplied by 3, the ones (units) digit of the result is (A) 9 (B) 3 (C) 5 (D) 4 (E) 6 3. Some of the 1 × 1 squares in a 3 × 3 grid are shaded, as shown. What is the perimeter of the shaded region? (A) 10 (B) 14 (C) 8 (D) 18 (E) 20 4. If 3x + 4 = x + 2, the value of x is (A) 0 (B) −4 (C) −3 (D) −1 (E) −2 5. Which of the following is equal to 110% of 500? (A) 610 (B) 510 (C) 650 (D) 505 (E) 550 6. Eugene swam on Sunday, Monday and Tuesday. On Monday, he swam for 30 minutes. On Tuesday, he swam for 45 minutes. His average swim time over the three days was 34 minutes. For how many minutes did he swim on Sunday? (A) 20 (B) 25 (C) 27 (D) 32 (E) 37.5 7. For which of the following values of x is x 3 < x2 ? (A) x = 5 3 (B) x = 3 4 (C) x = 1 (D) x = 3 2 (E) x = 2112 years, Janice will be 8 times as old as she was 2 years ago. How old is Janice now? (A) 4 (B) 8 (C) 10 (D) 2 (E) 6 10. In the diagram, pentagon T P SRQ is constructed from equilateral 4 P T Q and square P QRS. The measure of ∠ST R is equal to (A) 10◦ (B) 15◦ (C) 20◦ (D) 30◦ (E) 45◦ Q P R S T Part B: Each correct answer is worth 6. 11. In the diagram, which of the following points is at a different distance from P than the rest of the points? (A) A (B) B (C) C (D) D (E) E y A x 2 2 4 4 6 8 6 8 B C D E P 12. If x = 2 and y = x 2 − 5 and z = y 2 − 5, then z equals (A) −6 (B) −8 (C) 4 (D) 76 (E) −4 13. In the diagram, P QR is a straight line segment. If x + y = 76, what is the value of x? (A) 28 (B) 30 (C) 35 (D) 36 (E) 38 x° x° x° y° y° P Q R 14. The line with equation y = 2x − 6 is reflected in the y-axis. What is the x-intercept of the resulting line? (A) −12 (B) 6 (C) −6 (D) −3 (E) 0 15. Amy bought and then sold 15n avocados, for some positive integer n. She made a profit of $100. (Her profit is the difference between the total amount that she earned by selling the avocados and the total amount that she spent in buying the avocados.) She paid $2 for every 3 avocados. She sold every 5 avocados for $4. What is the value of n? (A) 100 (B) 20 (C) 50 (D) 30 (E) 8 16. If 3x = 5, the value of 3x+2 is (A) 10 (B) 25 (C) 2187 (D) 14 (E) 45
SOAL 1. Dalam Islam, tawuran termasuk perbuatan yang… A. Dianjurkan jika untuk membela teman B. Boleh dilakukan jika merasa benar C. Dilarang karena merugikan banyak pihak D. Wajib jika ada yang memulai E. Diperbolehkan dalam keadaan tertentu 2. Yang dimaksud dengan zina hati adalah… A. Perbuatan zina secara langsung B. Keinginan dan niat dalam hati terhadap hal yang dilarang C. Perkataan kasar kepada orang lain D. Perbuatan mencuri E. Melakukan ibadah dengan ikhlas 3. Salah satu faktor seseorang melakukan pacaran adalah... A. Tekanan ekonomi B. Rasa ketertarikan C. Kewajiban keluarga D. Tuntutan sekolah E. Peraturan pemerintah 4. Dalam konteks pembagian zina anggota tubuh (zina kecil), yang dimaksud dengan "zina tangan" secara spesifik adalah... a. Menggunakan tangan untuk mengambil barang yang bukan haknya. b. Memukul orang lain hingga terluka karena marah. c. Menyentuh atau memegang lawan jenis yang bukan mahram dengan sengaja. d. Menuliskan kata-kata kasar atau fitnah di media sosial. e. Memberikan bantuan kepada orang yang berniat melakukan maksiat. 5. Seorang remaja mulai merokok karena ingin diterima dalam kelompok pergaulannya. Jika dilihat dari sudut pandang pengambilan keputusan, tindakan yang paling tepat adalah… A. Mengikuti kebiasaan kelompok agar tidak dikucilkan B. Menolak dengan tegas dan mencari lingkungan yang lebih sehat C. Mencoba sekali saja agar tidak penasaran D. Diam saja tanpa mengambil sikap E. Ikut merokok tetapi diam-diam 6. Zina kaki terjadi ketika seseorang… A. Menggunakan kaki untuk bekerja B. Melangkah menuju hal yang dilarang agama C. Berjalan santai di taman D. Pergi ke tempat umum E. Mengantar teman pulang 7. Menurut hadits Nabi SAW, zina mata dilakukan dengan cara... A. Mendengar hal-hal yang haram B. Berbicara tentang lawan jenis C. Melihat lawan jenis yang bukan mahram dengan syahwat D. Memikirkan hal-hal kotor E. Meraba lawan jenis 8. Tawuran bertentangan dengan ajaran Islam karena tidak mencerminkan sikap… A. Sombong B. Sabar dan menahan amarah C. Malas D. Boros E. Takut 9. Contoh zina hati adalah… A. Membantu orang tua B. Berniat melakukan perbuatan maksiat C. Belajar dengan sungguh-sungguh D. Menjaga lisan dari kata-kata buruk E. Bersedekah kepada yang membutuhkan 10. Kurangnya perhatian dari keluarga dapat menyebabkan remaja... A. Menjadi lebih mandiri tanpa pengaruh B. Mencari kenyamanan melalui pacaran C. Menghindari semua pergaulan D. Lebih fokus belajar E. Menjadi pemimpin 11. Rasulullah SAW bersabda bahwa setiap anak Adam telah ditentukan bagian zinanya yang tidak bisa tidak akan dialaminya. Dalam hadits tersebut, Rasulullah menegaskan bahwa "zina tangan adalah..." a. Menunjuk b. Menggenggam c. Menulis d. Menyentuh e. Memberi 12. Perhatikan pernyataan berikut: (1) Tekanan teman sebaya (2) Kurangnya pengawasan orang tua (3) Rasa ingin tahu tinggi (4) Prestasi akademik yang baik Faktor utama yang mendorong remaja terjerumus dalam pergaulan bebas dan merokok ditunjukkan oleh nomor… A. (1), (2), dan (3) B. (1), (2), dan (4) C. (2), (3), dan (4) D. (1) dan (4) saja E. (3) dan (4) saja 13. Perilaku zina kaki harus dihindari karena… A. Membuat tubuh lelah B. Termasuk perbuatan dosa C. Mengurangi waktu istirahat D. Membuat kaki sakit E. Menghambat aktivitas 14. Zina mata termasuk dalam kategori perbuatan yang... A. Diperbolehkan jika tidak sengaja B. Dosa besar dan wajib dihindari C. Merupakan dosa kecil D. Biasa saja dan tidak berdampak E. Dapat dihapus dengan sedekah saja 15. Berikut ini yang merupakan dampak negatif dari tawuran adalah… A. Menambah teman baru B. Mendapat pujian dari masyarakat C. Terjalin persatuan D. Menimbulkan kerusakan dan korban E. Meningkatkan prestasi 16. Perbedaan zina hati dan zina fisik adalah… A. Zina hati lebih berat dari zina fisik B. Zina fisik tidak berdosa C. Zina hati hanya dalam pikiran/perasaan, sedangkan zina fisik dalam perbuatan D. Keduanya tidak ada hubungan E. Zina hati tidak perlu dihindari 17. Seorang siswa mulai berpacaran karena semua temannya melakukannya. Faktor utama yang memengaruhi adalah... A. Media sosial B. Rasa penasaran C. Lingkungan pergaulan D. Kurangnya aturan sekolah E. Pendidikan agama 18. Al-Qur'an Surah Al-Isra ayat 32 melarang umat Islam untuk "mendekati zina". Bagaimana kaitan larangan "mendekati" tersebut dengan perbuatan zina tangan? a. Zina tangan hanya dilarang jika dilakukan oleh mereka yang sudah menikah. b. Zina tangan dianggap sebagai salah satu pintu atau perantara yang dilarang karena dapat mengarah pada zina besar. c. Ayat tersebut hanya melarang zina besar, sedangkan zina tangan hanya dianggap makruh. d. Larangan tersebut hanya berlaku jika sentuhan tangan dilakukan di tempat yang sepi. e. Zina tangan tidak termasuk dalam cakupan ayat tersebut karena tidak melibatkan persetubuhan. 19. Seorang siswa mengetahui bahwa temannya sering merokok di lingkungan sekolah. Sikap yang paling mencerminkan tanggung jawab sosial adalah… A. Membiarkannya karena itu urusan pribadi B. Ikut mencoba agar memahami perasaan teman C. Menegur dengan baik dan melaporkan kepada pihak sekolah D. Menjauhi tanpa alasan yang jelas E. Menyebarkan kabar tersebut ke teman lain 20. Seseorang yang sengaja pergi ke tempat maksiat berarti… A. Melakukan kebaikan B. Melakukan zina hati C. Melakukan zina kaki D. Melakukan ibadah E. Tidak melakukan apa-apa 21. Contoh perilaku zina mata dalam kehidupan sehari-hari adalah... A. Menundukkan pandangan saat bertemu lawan jenis B. Membaca Al-Qur'an C. Menonton film porno atau tayangan aurat D. Menghadiri majelis ilmu E. Melihat pemandangan alam 22. Cara menghindari tawuran menurut ajaran Islam adalah… A. Membalas jika diserang B. Ikut-ikutan teman C. Menyelesaikan masalah dengan musyawarah D. Membentuk kelompok untuk melawan E. Menghindari semua orang 23. Cara menghindari zina hati adalah… A. Mengikuti hawa nafsu B. Membiarkan pikiran bebas C. Menjaga pandangan dan memperkuat iman D. Mengabaikan nasihat agama E. Bergaul bebas tanpa batas 24. Jika seorang siswa mengalami stres akibat hubungan pacaran, dampak yang paling tepat adalah... A. Meningkatnya prestasi belajar B. Hubungan sosial menjadi lebih baik C. Tekanan emosional dan mental D. Menjadi lebih disiplin E. Lebih fokus pada tujuan hidup 25. Terdapat sebuah hadits yang memberikan peringatan keras bahwa ditusuknya kepala seseorang dengan pasak/jarum besi lebih baik baginya daripada menyentuh wanita yang tidak halal baginya. Pelajaran utama dari kerasnya ancaman ini adalah... a. Syariat Islam menetapkan hukuman fisik bagi pelaku zina tangan di dunia. b. Menyentuh lawan jenis yang bukan mahram adalah dosa kecil yang mudah dihapuskan. c. Besarnya bahaya fitnah dari sentuhan fisik sehingga Islam menutup rapat celah tersebut dengan peringatan yang sangat berat. d. Ancaman tersebut hanya berlaku bagi kaum laki-laki dan tidak berlaku bagi wanita. e. Perbuatan tersebut hanya dilarang jika dilakukan dengan niat ingin melamar. 26. Dampak jangka panjang dari kebiasaan merokok bagi remaja tidak hanya pada kesehatan, tetapi juga kehidupan sosial. Contoh dampak sosial yang tepat adalah… A. Meningkatkan rasa percaya diri B. Memperluas jaringan pertemanan C. Menurunkan kepercayaan orang lain D. Membuat lebih fokus belajar E. Menambah energi dalam aktivitas 27. Sikap yang benar untuk menghindari zina kaki adalah… A. Mengikuti teman ke tempat negatif B. Membiasakan diri pergi ke tempat baik C. Mendatangi tempat maksiat D. Tidak peduli ke mana kaki melangkah E. Pergi ke tempat yang merugikan diri 28. Perhatikan pernyataan berikut! (1) Memandang lawan jenis dengan kagum (2) Melihat foto yang tidak menutup aurat (3) Menundukkan pandangan (ghadhul bashar) (4) Menonton adegan mesra di media sosial (5) Tidak sengaja melihat lawan jenis Yang termasuk contoh zina mata ditunjukkan oleh nomor... A. (1), (2), dan (3) B. (2), (3), dan (4) C. (1), (2), dan (4) D. (3), (4), dan (5) E. (1), (3), dan (5) KUNCI JAWABAN 1. C 2. B 3. B 4. C 5. B 6. B 7. C 8. B 9. B 10. B 11. D 12. A 13. B 14. C 15. D 16. C 17. C 18. B 19. C 20. C 21. C 22. C 23. C 24. C 25. C 26. C 27. B 28. C
ON SCREEN C2 UNIT 4-5 COLLOCATIONS
C2 zzi.sh 4-5(Unit 6: 6-3) In a hospital
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Reading Passage: The Anatomy of a Kill Chain In the lexicon of modern warfare, the term "kill chain" describes the end-to-end process of a military attack, from the initial identification of a target to its eventual destruction and the subsequent evaluation of the strike's effectiveness. Conceptually, the kill chain is a structural model used to understand and optimize the speed and precision of military operations. The fundamental principle of this model is that an attack functions as a sequence of interdependent stages; if any single link in the chain is broken, the entire operation fails. For strategic planners, this creates a dual objective: to accelerate one's own kill chain while simultaneously finding ways to disrupt the adversary's. Strategic Concept: The Kinetic Model (F2T2EA) The traditional military kill chain is often summarized by the acronym F2T2EA, representing a continuous cycle of find, fix, track, target, engage, and assess. The kinetic kill chain begins with Find, the reconnaissance phase where intelligence assets identify a potential target within a theater of operations. Once found, the process moves to Fix, which involves pinning down the target's specific location and ensuring it can be distinguished from friendly forces or non-combatants. Track follows, maintaining a persistent watch on the target's movements to prevent its escape. In the Target phase, commanders select the appropriate weapon system and verify the legality and strategic value of the strike. Engage is the kinetic moment—the actual deployment of ordnance against the objective. Finally, Assess involves battle damage assessment (BDA) to determine if the desired effects were achieved or if further engagement is required. This model emphasizes "compressing the sensor-to-shooter timeline," meaning the faster a military can move through these steps, the more lethal it becomes. The Evolution: The Cyber Kill Chain® As warfare expanded into the digital domain, Lockheed Martin adapted the kinetic model into the Cyber Kill Chain. This framework assists defenders in identifying and stopping Advanced Persistent Threats (APTs). Unlike a physical missile, a cyberattack often unfolds over weeks or months, but the sequential logic remains the same. The model consists of seven distinct stages: Stage Description of Attacker Activity 1. Reconnaissance The harvesting of information. Attackers research targets via social media, public records, and technical scanning to find vulnerabilities. 2. Weaponization Coupling a remote access trojan with an exploit into a deliverable payload (e.g., a malicious PDF or Microsoft Office document). 3. Delivery Transmission of the weapon to the target environment. Common vectors include email attachments, malicious websites, or USB drives. 4. Exploitation The weapon triggers. The code executes on the victim's system, typically by taking advantage of a software or operating system vulnerability. 5. Installation The attacker installs a persistent backdoor or malware on the victim's system, allowing them to maintain access even after a reboot. 6. Command & Control (C2) The compromised system opens a communication channel back to the attacker's server, allowing the intruder to give manual instructions. 7. Actions on Objective The final stage where the attacker achieves their goal, such as data exfiltration, encryption for ransom, or destruction of critical infrastructure. Strategic Implications for Defense The strategic value of the Cyber Kill Chain lies in its ability to provide a roadmap for "proactive defense." By understanding the sequence, security professionals can implement controls at every stage. For instance, robust email filtering can break the chain at the Delivery stage, while endpoint detection can stop the Installation phase. Crucially, the earlier a defender breaks the chain, the lower the cost of mitigation and the lower the risk of damage. If an attacker is stopped during Reconnaissance, they have gained nothing. If they are stopped during Actions on Objective, the damage may already be catastrophic. In both kinetic and cyber environments, the goal is the same: to create a "defensive depth" that makes the cost of a successful attack prohibitively high for the adversary.
Make mcq quiz with 4 option in which one is correct -'10 Basis of Material Science • .....;;;";;;"~~;;,,;;,,,,;.;.,,;;,,,;,,;.;,.,------------ 6. Temporary materials: Some materials are meant to be placed in the oral cavity for a short period of time for different reasons. • Temporary crowns: While a permanent crown is prepared in the dental laboratory, the patient must wait for few days before it can be fabricated and cemented into place. Does patient experience any problems during this time period? If the tooth is vital (the pulp is alive), the patient is likely to experience pain and sensitivity while eating and drinking, also it looks unesthetic. What can be done to solve this problem? A temporary crown is placed before the patient leaves the clinic. It is constructed and luted in the same appointment in which the crown preparation is done. Temporary crowns are not very strong or esthetic but they serve adequately till the permanent crown is ready to be cemented. • Temporary restorations: Sometimes it is difficult to decide immediately the best line of treatment for a particular tooth. The exact condition of the pulp may not be obvious to the dentist from the patient's symptoms. A dentist removes all or part of the decay and then places a temporary restoration to have time to observe the behaviour of the pulp or to give the pilip time to heal before deciding the further treatment required. Classification based on Location of Fabrication 4,9 Materials can be classified based on the location of fabrication into: • Direct restorative materials. • Indirect restorative materials Direct restorative materials: They include those materials which are used to restore cavity preparations directly in the oral cavity (Box 1.5). Box 1.5: Examples of direct restorative materials Amalgam, composites, glass ionomer and other materials, which set by chemical reactions in the mouth. Indirect restorative materials: It includes those restorations which must be fabricated outside the mouth, indirectly on a cast/ model/ die, because their processing condition would harm oral tissues. Materials used in the construction of such prosthesis are called indirect restorative materials (Box 1.6). Box 1.6: Examples of indirect restorative materials Gold inlays, crowns of metal, ceramic and polymers, which are processed at elevated temperatures. Some indirect composite restorations can be processed under specific wavelength of light, e.g. Ceramage. Classification based on Longevity of Use 1. Permanent restorations: These restorations are not planned to be replaced for a particular time period. Though they are referred to as permanent, actually they are not, e.g. fillings, crowns, bridges and dentures do not last forever (Fig. 1.5). 2. Temporary restorations: These restorations are planned to be replaced in a short period of time, such as few days to weeks. For ~ Permanent C/) c c -.2 0 c- :;::; Cll co Interim ~ Q; 0 .8ll::1iJ C/) o~ Cll a:: c:=:J Temporary Time period Fig. 1.5: Diagram depicting the time period of use of a restoration. (Arrow in permanent restoration depicts that such restorations are not planned to be replaced for a long period of time.) Introducton to Dental Materials Dental materials Box 1.7: Characteristics of metals 1. High thermal and electrical conductivity 2. Ductility (pure metals are very soft and they can be bent without breaking) 3. Opacity (they do not transmit light) 4. Luster (they have a surface that strongly reflects light and appears bright and shiny) 5. They tend to dissolve to some extent in water or other aqueous solutions, producing cations. 6. All metals are white (actually gray) except for gold, which is yellow, and copper, which is reddish. 7. All metals are solid at room temperature except mercury, which is liquid at room temperature and is used with silver alloys as amalgam. 8. All metals have high melting temperatures because of high strength of the metallic bond that holds the atoms together. 3. Polymers 4. Composites Composites are mixtures of two or more of the first three classes in which the different components remain distinct from one another in the final structure. A common example is composite resin. Fig. 1.7a: Three-dimensional structure of iron (metal) Metals Metals are the oldest of the three classes of materials that have been used as dental materials. Metals are characterized by metallic bonds (Box 1.7) which will be discussed in the next chapter. Metals solidify with their atoms in a regular or crystalline arrangement (see Chapter 2), often in the form of a cube (Fig. 1.7a). example, temporary fillings done in a tooth during root canal treatment, which have to be replaced within 2-4 days during subsequent visits. They are used to protect the tooth and provide function till the final restoration is done. 3. Interim restoration: At times, dental treatment requires "long-term" definite temporary restorations or "interim" restorations. For examle, a 7-year-old child, met with trauma and fractured one of his central incisors. A large composite build- up may serve his immediate requirement until the root formation is completed and a permanent crown is placed. 5 Classification based on the Chemical Nature of the Material These are the atoms that make up a material and the way they are bonded together determine the properties of that materiaLS Weak bonds make for weak materials and vice versa (Table 1.4). Materials can be classified into different categories based on their primary atomic bonds (Fig. 1.6): 1. Metals 2. Ceramics Fig. 1.6: Classification of dental materials based on chemical nature 12 Basis of Material Science Box 1.9: Benefits of ceramics in dentistry 1. Many ceramic oxides are used as pigmenting agents. These oxides produce good range of colors. Due to this characteristic, we are able to match almost any tooth color with good esthetic results. 2. They are inert, i.e. not chemically reactive. This quality provides ceramics with good bio- compatibility. 3. Ceramic materials are translucent, like natural teeth. This translucency gives the ceramic crown a more natural appearance than any other dental material. Fig. 1.7b: Internal arrangement of tetrahedral structure of ceramic (silica) four large oxygen atoms surround smaller silicon atom Ceramics A ceramic is a compound formed by the union of a metallic and a non-metallic element (Box 1.8). Most of these materials are oxides, formed by the union of oxygen with metals such as silicon, aluminum, calcium and magnesium (Fig.1.7b). Ceramics may be simple or complex. Examples of simple ceramics are alumina and silica. Examples of complex ceramics are feldspar (potassium aluminum silicate) and kaolin (hydrated aluminum silicate). Ceramics may be crystalline or non- crystalline (i.e. amorphous). Porcelain is a specific type of ceramic used extensively in dentistry (Box 1.9). Box 1.8: Characteristics of ceramics 1. High melting points. 2. Brittleness, which means they cannot be bent or deformed (no sliding) to any extent without actually cracking and breaking. 3. They are poor conductor of heat and electricity. 4. They are chemically inert. 5. They have excellent esthetic result in terms of matching natural teeth. Fig. 1.8: Stucture of synthetic polymer Polymers They are the latest addition (early to mid- 1900s) to dental materials. Most of the polymers are nowadays synthesized by humans. Polymers are giant, long-chain organic molecules (Fig. 1.8). Polymers are characterized by covalent bonds within each molecule, giving them tremendous strength in a single direction. Try to break a nylon rope by pulling it! They are poor conductors of heat and electri- city. Most polymers have a structure containing thousands of carbon atoms linked together like beads on a string. Others, such as silicone polymers are formed with silicon-oxygen bonds. Introducton to Dental Materials Table 1.4: Characteristics of different materials 13 Characteristics Bond Properties Crystal structure Metals Metallic bonding High strength and hardness, high electrical and thermal conductivity BCC, FCC, or HCP unit cells Ceramics Ionic or covalent bonding, or both High hardness and stiffness, electrically insulating, refractory, and chemically inert Crystalline or amorphous Polymers Covalent bonding Low sensitivity, high electrical resistivity, and low thermal conductivity, strength and stiffness vary widely Amorphous and crystalline Composites Composites are combinations of any of the basic ceramic, metallic and polymeric materials (Box 1.10). Each material that makes up composites is called a phase. Their properties tend to be somewhere between those of their basic constituents and are used to enhance their performance, longevity and handling chracterstics. Box 1.10: Types of composites in dentistry 1. Ceramic - metallic composite: Tungsten carbide bur. 2. Metal - polymer composite: Die materials in dental laboratory. 3. Ceramic - polymer composite: Enamel, dentin, bone and restorative composites. A composite is a kind of "combination" of materials, which compliment each other. The properties lacking in one material are compensated by those of the other material. For example, restorative composite has two phases, namely resin and fillers. Teeth and bones are examples of natural composites. Enamel is a composite of hydroxyapatite (which is a ceramic material) and protein (which is a polymer). EVALUATION OF DENTAL MATERIALS Most manufacturers of dental materials maintain a quality assurance programme (As per international standard like ADA specifications) and materials are thoroughly tested before being released into the market for dental practitioner (Fig. 1.9). Laboratory Evaluations Most ADA/ ANSI specifications involve laboratory tests. The tests performed as per these specifications are useful but they all are performed in vitro, (carried out in the laboratory away from the clinical conditions) which have a lot of limitations in clinical practice.lO Clinical Notes 1. For example, most of the direct restorative materials are tested for their compressive strength but ultimately the material is subjected to a combination of compressive, tensile and shear stresses, which may decide the final success or failure of the material under masticatory load. 2. Similarly upper dentures mostly fracture along the midline because of bending. Hence a bending or transverse strength ~B-a-s-is-o-f-M-a-t-e-ria-I-S~c-ie-n-c-e-------------- ---------. test is far more meaningful for denture base materials than a compression test. Clinical Trials The majority of new materials are subjected to extensive clinical trials normally in co-operation with a dental college or hospital departments prior to their release. CONCLUSION As the number of available materials is going up, it is important that the dentist remains more aware about new products so that their judgement about the selection of material remains successful. Materials which have not been thoroughly evaluated should be avoided, specially with clinical dentistry falling under Consumer Protection Act (CPA). I Research and development I iI Manufacturer/analysis Ideal requirements for clinical use: Thermal, optical, mechanical, chemical, biological Available materials and their properties are evaluated Launch of new I product Choice and selection of material by the dentist Critical assessment based on clinical performance I I H feedback to I
¿Qué es la validez de un instrumento de investigación? A) La cantidad de ítems que contiene. B) La facilidad con la que se puede aplicar. C) La capacidad de medir lo que se supone que debe medir. D) La rapidez con la que se obtienen los resultados. Respuesta: C 2. ¿Cuál de los siguientes tipos de validez se refiere a la capacidad del instrumento para predecir resultados futuros? A) Validez de contenido B) Validez de criterio C) Validez concurrente D) Validez predictiva Respuesta: D 3. ¿Cuál de los siguientes análisis permite evaluar si los ítems están estructurados coherentemente dentro de un instrumento? A) Prueba-retest B) Análisis de validez de criterio C) Análisis factorial D) Análisis de intervalo de confianza Respuesta: C 4. ¿Qué tipo de validez compara los resultados de un instrumento con otros instrumentos que miden el mismo constructo? A) Validez de contenido B) Validez concurrente C) Validez predictiva D) Validez interna Respuesta: B 5. ¿Qué aspecto evalúa la confiabilidad de un instrumento? A) Su estructura teórica B) Su consistencia y estabilidad en los resultados C) Su diseño gráfico D) Su tipo de preguntas Respuesta: B 6. ¿Qué técnica se utiliza para evaluar la confiabilidad temporal de un instrumento? A) Análisis de varianza B) Entrevista estructurada C) Prueba-retest D) Análisis factorial Respuesta: C 7. ¿Qué caracteriza a los instrumentos cuantitativos? A) Se enfocan en la interpretación de significados. B) Utilizan entrevistas abiertas. C) Permiten análisis estadístico de datos numéricos. D) No permiten generalización de los resultados. Respuesta: C 8. ¿Cuál de las siguientes opciones corresponde a un instrumento cualitativo? A) Escala de medición de temperatura B) Encuesta con opciones múltiples C) Grupo focal con preguntas abiertas D) Prueba de rendimiento académico Respuesta: C 9. ¿Qué distingue a los instrumentos mixtos? A) Solo miden variables cualitativas. B) Utilizan únicamente escalas numéricas. C) Combinan medición cuantitativa y cualitativa. D) Se basan en observaciones no estructuradas únicamente. Respuesta: C 10. ¿Cuál de los siguientes es un ejemplo de instrumento mixto? A) Escala Likert B) Ficha de observación no estructurada C) Entrevista estructurada con preguntas abiertas y cerradas D) Prueba proyectiva sin escala Respuesta: C