Estimation of solar radiation by different machine learning methodsmehmet şahin
In this study, solar radiation was estimated depend on 34 locations. While doing distribution
of the locations on Turkey, they were taken into consideration to be different climatic
conditions. In the study, meteorological data was used between the years of 2007 and 2015. The
meteorological data which were used, were land surface temperature at 5 cm, air temperature,
sunshine duration and solar radiation. As geographical data, locations of latitude, longitude
and altitude were used. Three different methods were used for estimating the solar radiation.
These are the methods of multilayer perceptron neural network, multiple regression and radial
basis function network. The estimation results obtained from the methods were compared with
the actual values obtained from the meteorological station, statistically. The mean bias error
(MBE), root mean square error (RMSE) and correlation coefficient (R) were used as evaluation
criteria. According to statistical results, multilayer perceptron neural networks has given the
most successful result in the three methods. The MBE, RMSE and R values of method were
calculated as 1.5321 MJ/m2, 2.4295 MJ/m2, and 0.9428, respectively. It is recommended to
researchers to use multilayer perceptron neural networks method for studies in this area.
Estimation of solar radiation by different machine learning methodsmehmet şahin
In this study, solar radiation was estimated depend on 34 locations. While doing distribution
of the locations on Turkey, they were taken into consideration to be different climatic
conditions. In the study, meteorological data was used between the years of 2007 and 2015. The
meteorological data which were used, were land surface temperature at 5 cm, air temperature,
sunshine duration and solar radiation. As geographical data, locations of latitude, longitude
and altitude were used. Three different methods were used for estimating the solar radiation.
These are the methods of multilayer perceptron neural network, multiple regression and radial
basis function network. The estimation results obtained from the methods were compared with
the actual values obtained from the meteorological station, statistically. The mean bias error
(MBE), root mean square error (RMSE) and correlation coefficient (R) were used as evaluation
criteria. According to statistical results, multilayer perceptron neural networks has given the
most successful result in the three methods. The MBE, RMSE and R values of method were
calculated as 1.5321 MJ/m2, 2.4295 MJ/m2, and 0.9428, respectively. It is recommended to
researchers to use multilayer perceptron neural networks method for studies in this area.
2024 State of Marketing Report – by HubspotMarius Sescu
https://www.hubspot.com/state-of-marketing
· Scaling relationships and proving ROI
· Social media is the place for search, sales, and service
· Authentic influencer partnerships fuel brand growth
· The strongest connections happen via call, click, chat, and camera.
· Time saved with AI leads to more creative work
· Seeking: A single source of truth
· TLDR; Get on social, try AI, and align your systems.
· More human marketing, powered by robots
ChatGPT is a revolutionary addition to the world since its introduction in 2022. A big shift in the sector of information gathering and processing happened because of this chatbot. What is the story of ChatGPT? How is the bot responding to prompts and generating contents? Swipe through these slides prepared by Expeed Software, a web development company regarding the development and technical intricacies of ChatGPT!
Product Design Trends in 2024 | Teenage EngineeringsPixeldarts
The realm of product design is a constantly changing environment where technology and style intersect. Every year introduces fresh challenges and exciting trends that mold the future of this captivating art form. In this piece, we delve into the significant trends set to influence the look and functionality of product design in the year 2024.
How Race, Age and Gender Shape Attitudes Towards Mental HealthThinkNow
Mental health has been in the news quite a bit lately. Dozens of U.S. states are currently suing Meta for contributing to the youth mental health crisis by inserting addictive features into their products, while the U.S. Surgeon General is touring the nation to bring awareness to the growing epidemic of loneliness and isolation. The country has endured periods of low national morale, such as in the 1970s when high inflation and the energy crisis worsened public sentiment following the Vietnam War. The current mood, however, feels different. Gallup recently reported that national mental health is at an all-time low, with few bright spots to lift spirits.
To better understand how Americans are feeling and their attitudes towards mental health in general, ThinkNow conducted a nationally representative quantitative survey of 1,500 respondents and found some interesting differences among ethnic, age and gender groups.
Technology
For example, 52% agree that technology and social media have a negative impact on mental health, but when broken out by race, 61% of Whites felt technology had a negative effect, and only 48% of Hispanics thought it did.
While technology has helped us keep in touch with friends and family in faraway places, it appears to have degraded our ability to connect in person. Staying connected online is a double-edged sword since the same news feed that brings us pictures of the grandkids and fluffy kittens also feeds us news about the wars in Israel and Ukraine, the dysfunction in Washington, the latest mass shooting and the climate crisis.
Hispanics may have a built-in defense against the isolation technology breeds, owing to their large, multigenerational households, strong social support systems, and tendency to use social media to stay connected with relatives abroad.
Age and Gender
When asked how individuals rate their mental health, men rate it higher than women by 11 percentage points, and Baby Boomers rank it highest at 83%, saying it’s good or excellent vs. 57% of Gen Z saying the same.
Gen Z spends the most amount of time on social media, so the notion that social media negatively affects mental health appears to be correlated. Unfortunately, Gen Z is also the generation that’s least comfortable discussing mental health concerns with healthcare professionals. Only 40% of them state they’re comfortable discussing their issues with a professional compared to 60% of Millennials and 65% of Boomers.
Race Affects Attitudes
As seen in previous research conducted by ThinkNow, Asian Americans lag other groups when it comes to awareness of mental health issues. Twenty-four percent of Asian Americans believe that having a mental health issue is a sign of weakness compared to the 16% average for all groups. Asians are also considerably less likely to be aware of mental health services in their communities (42% vs. 55%) and most likely to seek out information on social media (51% vs. 35%).
AI Trends in Creative Operations 2024 by Artwork Flow.pdfmarketingartwork
This article is all about what AI trends will emerge in the field of creative operations in 2024. All the marketers and brand builders should be aware of these trends for their further use and save themselves some time!
A report by thenetworkone and Kurio.
The contributing experts and agencies are (in an alphabetical order): Sylwia Rytel, Social Media Supervisor, 180heartbeats + JUNG v MATT (PL), Sharlene Jenner, Vice President - Director of Engagement Strategy, Abelson Taylor (USA), Alex Casanovas, Digital Director, Atrevia (ES), Dora Beilin, Senior Social Strategist, Barrett Hoffher (USA), Min Seo, Campaign Director, Brand New Agency (KR), Deshé M. Gully, Associate Strategist, Day One Agency (USA), Francesca Trevisan, Strategist, Different (IT), Trevor Crossman, CX and Digital Transformation Director; Olivia Hussey, Strategic Planner; Simi Srinarula, Social Media Manager, The Hallway (AUS), James Hebbert, Managing Director, Hylink (CN / UK), Mundy Álvarez, Planning Director; Pedro Rojas, Social Media Manager; Pancho González, CCO, Inbrax (CH), Oana Oprea, Head of Digital Planning, Jam Session Agency (RO), Amy Bottrill, Social Account Director, Launch (UK), Gaby Arriaga, Founder, Leonardo1452 (MX), Shantesh S Row, Creative Director, Liwa (UAE), Rajesh Mehta, Chief Strategy Officer; Dhruv Gaur, Digital Planning Lead; Leonie Mergulhao, Account Supervisor - Social Media & PR, Medulla (IN), Aurelija Plioplytė, Head of Digital & Social, Not Perfect (LI), Daiana Khaidargaliyeva, Account Manager, Osaka Labs (UK / USA), Stefanie Söhnchen, Vice President Digital, PIABO Communications (DE), Elisabeth Winiartati, Managing Consultant, Head of Global Integrated Communications; Lydia Aprina, Account Manager, Integrated Marketing and Communications; Nita Prabowo, Account Manager, Integrated Marketing and Communications; Okhi, Web Developer, PNTR Group (ID), Kei Obusan, Insights Director; Daffi Ranandi, Insights Manager, Radarr (SG), Gautam Reghunath, Co-founder & CEO, Talented (IN), Donagh Humphreys, Head of Social and Digital Innovation, THINKHOUSE (IRE), Sarah Yim, Strategy Director, Zulu Alpha Kilo (CA).
Trends In Paid Search: Navigating The Digital Landscape In 2024Search Engine Journal
The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands.
It’s important that you’re ready to implement new strategies in 2024.
Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024.
You’ll learn:
- The latest trends in AI and automation, and what this means for an evolving paid search ecosystem.
- New developments in privacy and data regulation.
- Emerging ad formats that are expected to make an impact next year.
Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape.
If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.
5 Public speaking tips from TED - Visualized summarySpeakerHub
From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world.
With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively.
The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage.
Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience.
See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers
See the original article on Forbes here:
http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
ChatGPT and the Future of Work - Clark Boyd Clark Boyd
Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world.
Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance.
For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age.
Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.
A brief introduction to DataScience with explaining of the concepts, algorithms, machine learning, supervised and unsupervised learning, clustering, statistics, data preprocessing, real-world applications etc.
It's part of a Data Science Corner Campaign where I will be discussing the fundamentals of DataScience, AIML, Statistics etc.
Time Management & Productivity - Best PracticesVit Horky
Here's my presentation on by proven best practices how to manage your work time effectively and how to improve your productivity. It includes practical tips and how to use tools such as Slack, Google Apps, Hubspot, Google Calendar, Gmail and others.
The six step guide to practical project managementMindGenius
The six step guide to practical project management
If you think managing projects is too difficult, think again.
We’ve stripped back project management processes to the
basics – to make it quicker and easier, without sacrificing
the vital ingredients for success.
“If you’re looking for some real-world guidance, then The Six Step Guide to Practical Project Management will help.”
Dr Andrew Makar, Tactical Project Management
2024 State of Marketing Report – by HubspotMarius Sescu
https://www.hubspot.com/state-of-marketing
· Scaling relationships and proving ROI
· Social media is the place for search, sales, and service
· Authentic influencer partnerships fuel brand growth
· The strongest connections happen via call, click, chat, and camera.
· Time saved with AI leads to more creative work
· Seeking: A single source of truth
· TLDR; Get on social, try AI, and align your systems.
· More human marketing, powered by robots
ChatGPT is a revolutionary addition to the world since its introduction in 2022. A big shift in the sector of information gathering and processing happened because of this chatbot. What is the story of ChatGPT? How is the bot responding to prompts and generating contents? Swipe through these slides prepared by Expeed Software, a web development company regarding the development and technical intricacies of ChatGPT!
Product Design Trends in 2024 | Teenage EngineeringsPixeldarts
The realm of product design is a constantly changing environment where technology and style intersect. Every year introduces fresh challenges and exciting trends that mold the future of this captivating art form. In this piece, we delve into the significant trends set to influence the look and functionality of product design in the year 2024.
How Race, Age and Gender Shape Attitudes Towards Mental HealthThinkNow
Mental health has been in the news quite a bit lately. Dozens of U.S. states are currently suing Meta for contributing to the youth mental health crisis by inserting addictive features into their products, while the U.S. Surgeon General is touring the nation to bring awareness to the growing epidemic of loneliness and isolation. The country has endured periods of low national morale, such as in the 1970s when high inflation and the energy crisis worsened public sentiment following the Vietnam War. The current mood, however, feels different. Gallup recently reported that national mental health is at an all-time low, with few bright spots to lift spirits.
To better understand how Americans are feeling and their attitudes towards mental health in general, ThinkNow conducted a nationally representative quantitative survey of 1,500 respondents and found some interesting differences among ethnic, age and gender groups.
Technology
For example, 52% agree that technology and social media have a negative impact on mental health, but when broken out by race, 61% of Whites felt technology had a negative effect, and only 48% of Hispanics thought it did.
While technology has helped us keep in touch with friends and family in faraway places, it appears to have degraded our ability to connect in person. Staying connected online is a double-edged sword since the same news feed that brings us pictures of the grandkids and fluffy kittens also feeds us news about the wars in Israel and Ukraine, the dysfunction in Washington, the latest mass shooting and the climate crisis.
Hispanics may have a built-in defense against the isolation technology breeds, owing to their large, multigenerational households, strong social support systems, and tendency to use social media to stay connected with relatives abroad.
Age and Gender
When asked how individuals rate their mental health, men rate it higher than women by 11 percentage points, and Baby Boomers rank it highest at 83%, saying it’s good or excellent vs. 57% of Gen Z saying the same.
Gen Z spends the most amount of time on social media, so the notion that social media negatively affects mental health appears to be correlated. Unfortunately, Gen Z is also the generation that’s least comfortable discussing mental health concerns with healthcare professionals. Only 40% of them state they’re comfortable discussing their issues with a professional compared to 60% of Millennials and 65% of Boomers.
Race Affects Attitudes
As seen in previous research conducted by ThinkNow, Asian Americans lag other groups when it comes to awareness of mental health issues. Twenty-four percent of Asian Americans believe that having a mental health issue is a sign of weakness compared to the 16% average for all groups. Asians are also considerably less likely to be aware of mental health services in their communities (42% vs. 55%) and most likely to seek out information on social media (51% vs. 35%).
AI Trends in Creative Operations 2024 by Artwork Flow.pdfmarketingartwork
This article is all about what AI trends will emerge in the field of creative operations in 2024. All the marketers and brand builders should be aware of these trends for their further use and save themselves some time!
A report by thenetworkone and Kurio.
The contributing experts and agencies are (in an alphabetical order): Sylwia Rytel, Social Media Supervisor, 180heartbeats + JUNG v MATT (PL), Sharlene Jenner, Vice President - Director of Engagement Strategy, Abelson Taylor (USA), Alex Casanovas, Digital Director, Atrevia (ES), Dora Beilin, Senior Social Strategist, Barrett Hoffher (USA), Min Seo, Campaign Director, Brand New Agency (KR), Deshé M. Gully, Associate Strategist, Day One Agency (USA), Francesca Trevisan, Strategist, Different (IT), Trevor Crossman, CX and Digital Transformation Director; Olivia Hussey, Strategic Planner; Simi Srinarula, Social Media Manager, The Hallway (AUS), James Hebbert, Managing Director, Hylink (CN / UK), Mundy Álvarez, Planning Director; Pedro Rojas, Social Media Manager; Pancho González, CCO, Inbrax (CH), Oana Oprea, Head of Digital Planning, Jam Session Agency (RO), Amy Bottrill, Social Account Director, Launch (UK), Gaby Arriaga, Founder, Leonardo1452 (MX), Shantesh S Row, Creative Director, Liwa (UAE), Rajesh Mehta, Chief Strategy Officer; Dhruv Gaur, Digital Planning Lead; Leonie Mergulhao, Account Supervisor - Social Media & PR, Medulla (IN), Aurelija Plioplytė, Head of Digital & Social, Not Perfect (LI), Daiana Khaidargaliyeva, Account Manager, Osaka Labs (UK / USA), Stefanie Söhnchen, Vice President Digital, PIABO Communications (DE), Elisabeth Winiartati, Managing Consultant, Head of Global Integrated Communications; Lydia Aprina, Account Manager, Integrated Marketing and Communications; Nita Prabowo, Account Manager, Integrated Marketing and Communications; Okhi, Web Developer, PNTR Group (ID), Kei Obusan, Insights Director; Daffi Ranandi, Insights Manager, Radarr (SG), Gautam Reghunath, Co-founder & CEO, Talented (IN), Donagh Humphreys, Head of Social and Digital Innovation, THINKHOUSE (IRE), Sarah Yim, Strategy Director, Zulu Alpha Kilo (CA).
Trends In Paid Search: Navigating The Digital Landscape In 2024Search Engine Journal
The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands.
It’s important that you’re ready to implement new strategies in 2024.
Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024.
You’ll learn:
- The latest trends in AI and automation, and what this means for an evolving paid search ecosystem.
- New developments in privacy and data regulation.
- Emerging ad formats that are expected to make an impact next year.
Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape.
If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.
5 Public speaking tips from TED - Visualized summarySpeakerHub
From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world.
With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively.
The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage.
Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience.
See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers
See the original article on Forbes here:
http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
ChatGPT and the Future of Work - Clark Boyd Clark Boyd
Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world.
Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance.
For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age.
Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.
A brief introduction to DataScience with explaining of the concepts, algorithms, machine learning, supervised and unsupervised learning, clustering, statistics, data preprocessing, real-world applications etc.
It's part of a Data Science Corner Campaign where I will be discussing the fundamentals of DataScience, AIML, Statistics etc.
Time Management & Productivity - Best PracticesVit Horky
Here's my presentation on by proven best practices how to manage your work time effectively and how to improve your productivity. It includes practical tips and how to use tools such as Slack, Google Apps, Hubspot, Google Calendar, Gmail and others.
The six step guide to practical project managementMindGenius
The six step guide to practical project management
If you think managing projects is too difficult, think again.
We’ve stripped back project management processes to the
basics – to make it quicker and easier, without sacrificing
the vital ingredients for success.
“If you’re looking for some real-world guidance, then The Six Step Guide to Practical Project Management will help.”
Dr Andrew Makar, Tactical Project Management
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Sunum
1. HACETTEPE ÜNİVERSİTESİ Fizik Mühendisliği Fiz 420-35 İleri Fizik Proje Raporu DURAN DALGALAR DENEY DÜZENEĞİ İÇİN JAVA PROGRAMIYLA BİLGİSAYAR SİMÜLASYONU HAZIRLANMASI T. YILMAZ DOĞAN 20119597 Proje Yöneticisi: Öğr. Gör. MUSTAFA M. BAYRAMGİL 09.06.2011
2. İçindekiler 1. Projenin Amacı ve Simülasyonun hedefi, 2. Giriş; a. Dalgalar , b. Java Programla Dili , 3. Önbilgi; a. Duran Dalgalar Deney Düzeneği; a. 1. Görsel Öğeler , a. 2. Bağıntılar , a. 3. Deney Hedefi ve Sonuçları , b. Simülasyon; b. 1. Ekran Görüntüsü, Sabit ve Değişkenler , b. 2. Akış Şeması , b. 3. Kodlar ; b. 3. 1. Kütüphane Erişimi , b. 3. 2. Bileşenlerin adlandırılması , b. 3. 3. Butonlar, İşlevleri ve Bağıntı İlişkilendirilmeleri , c. Deney Verilerinin Simülasyonda Kullanılması, 4. Sonuçlar ( Deney ve Simülasyon ), 5. Kaynaklar, 6. Teşekkürler.
3. 3/20 1.Projenin Amacı ve Simülasyonun hedefi, D uran dalgalar deney düzeneğinin, fizik kuralları çerçevesinde, java programlama dili kullanılarak, katılımcı bilgisayar simülasyonunun oluşturulması bu projenin amacıdır. G elişigüzel hatalardan kurtularak, deney düzeneğine ihtiyaç duymadan sonuçların teorik olarak hesaplanması ya da deney düzeneğiyle elde edilen sonuçların teorik hesaplarla karşılaştırılması bu projenin hedefidir.
4. 4/20 2.Giriş; a. Dalgalar, D alga, enerjinin ve bilginin taşınmasına yol açan titreşime verilen isimdir. Dalgalar üç ana başlıkta toplanabilir; * Mekanik dalgalar, * Elektromanyetik Dalgalar, * Madde Dalgaları. D alga hareketi sırasında ortamın yeri değişmez, sadece aşağı yukarı hareket eder. B ir engele doğru giden ve engelden geri yansıyan dalgaların girişmiyle oluşan dalgara duran dalgalar ( kararlı dalgalar ) denir. İki düğüm noktası arası uzaklık bir yarım dalgaboyu bölgesi ise, L uzunluğundaki bir ipte n kadar yarım dalga bölgesi oluşmuşsa; şeklinde bir ilişki vardır.
5. 5/20 2.Giriş; b. Java Programla Dili, J ava ile yazılmış programların bir bilgisayarda çalışması için öncelikle sisteme java programının sanal dokusunun kurulması gerekir. J ava ile herhangi bir ortamda oluşturulan bir yazılım, hiçbir değişiklik yapılmadan, hatta tekrar derlenmeye bile ihtiyaç duyulmadan başka bir ortamda kullanılabilir. İ htiyaç halinde gerekli modüller e ağ üzerinden erişilmesi mantığına dayandığından, modüllerinin tamamının kullanılan bilgisayarda bulunması gerekli değildir.
6. 3.Önbilgi; a. Duran Dalgalar Deney Düzeneği; a.1. Görsel Öğeler, Resim . Duran Dalgalar deney düzeneğinde dalga desenlerinin gözlenmesi. Resim . Duran Dalgalar deneyinin şematik gösterimi.
7. 7/20 3.Önbilgi; a. Duran Dalgalar Deney Düzeneği; a.2. Bağıntılar, D algalar için, bir ipin üzerindeki enine dalgaların hızı, dır. Burada T ipteki gerilme kuvveti (birimi : Newton), L ipin boyu (birimi : metre) ve M de ipin kütlesidir (birimi : kg). i pin birim uzunluğunun kütlesi için λ n dalgaboyu (birimi: metre), sabit f frekansına (birimi: Hz), biçiminde bağlıdır.
8. D eneyde µ ’ nün değeri gözetmen tarafından verilir. λ 2 ’ nin T ’ ye bağlı çizilecek grafiğinin s eğimi ile titreşicinin frekans değerine aşağıdaki eşitlik yardımıyla ulaşılır ki, buda deneye başlamadan önce bilinen titreşicinin gerçek frekans değeri ile karşılaştırılarak deneyde yapılan hata değeri ve deneyde alınan verilerin geçerliliği hakkında bize bilgi verir. D eney düzeneğinden alınan veriler deneyin amacı olan duran dalga sayısını verirken, aynı zamanda deneyin güvenilirliğinin de belirlenmesini sağlar. Düzenekteki sabit frekanslı titreşicinin gerçek değeri deneysel verilerle bulunan değeri ile karşılaştırılır. Bu karşılaştırmada gelişigüzel ve sistematik hatalar incelenecektir. Deney düzeneğinde sistematik hataların olmadığı varsayılırsa, yukardaki eşitlik ile bulunan frekans değeri için hata hesabı aşağıdaki gibi olur:
9. 9/20 3.Önbilgi; a. Duran Dalgalar Deney Düzeneği; a.3. Deney Hedefi ve Sonuçları, S onuç olarak ; “ İpteki duran dalganın dalgaboyunun, ipteki gerilmenin kareköküyle orantılı ” olduğu görülür. H esaplama sonuçları yorumlanırken unutulmaması gereken, deneyin ideal şartlarda yapıldığının düşünülmesidir. İdeal ortamlarda dalgaların hızlarının ve genliklerinin değişmediği kabul edilecektir.
10. 3.Önbilgi; b. Simülasyon; b.1. Ekran Görüntüsü, Sabit ve Değişkenler,
16. 16/20 Resim . Butonlara fizik formüllerinin atanması.
17. 3.Önbilgi; c. Deney Verilerinin Simülasyonda Kullanılması, Resim . Deneyde 7,6,5,4,3,2 adet yarım dalga bölgesinin gözlenmesini sağlayan kefeye konan ağırlıklar için simülasyonda gözlenen yarım dalga bölgesi sayıları (yeşil renkli kutularda) verilmiştir. Resim . Simülatör yardımıyla istenilen yarım dalga bölge sayıları için kefeye konulması gereken ağırlıklar.
18. 18/20 4.Sonuçlar ( Deney ve Simülasyon ), D eneyde titreştiricinin gerçek titreşim frekansıyla , verilerden gidilerek bulunan frekansı arasında %5.6 lık bir sapma vardır. T am duran dalga desenleri elde edilmesi için deney düzeneğinde kefeye konan ağırlıklarla , simülasyonda kefeye konulması gereken ağırlıklar arasında ise ~ %8 lik bir fark vardır. D eneysel veriler ve simülasyon arasındaki bu fark, ortam şartlarının etkisinin göz ardı edilmesi (sıcaklık gibi) , ideal şartlarda deneyin yapıldığının kabülüdür. B u sonuçlar altında hazırlanan simülasyonun deneysel sonuçlarla uyumlu olduğu söylenebilir.
19. 19/20 5.Kaynaklar, =============================================================================================================== (1) HALIDAY, RESNICK, WALKER, Fundamentals of Physics, ( Wiley & Sons Inc., NewYork, 6th Edition ), s.371 (2) SAKMAN, E., Çağlar Boyu bilim adamları, ( Bilim ve Teknik Yayınları, Ankara ), s.224-36 (3) KELLER, GETTYS, SKOVE, Fizik 1, ( McGraw-Hill – Literatür, İstanbul ), s.365,383 =============================================================================================================== (4) SCHROEDER, D.V., Physics Simulations in Java, ( Weber State Univercity, v2.3 ), s.6 =============================================================================================================== (5) Department of Physics of UTC, Physics Lab. Manual 1030L: Standing Waves, ( Tennessee, USA ), s.79 (6) SUNGUR,R., Temel Fizik Deneyleri Lab. Kılavuzu, ( H.Ü. Müh. Fak. Yayınları, 2000 ), s.48 (7) WILSON,J.D, Physics Laboratory Experiments, ( Houghton Mifflin Company, Newyork ), s.213 =============================================================================================================== (8) ROBERTS,B, Java Programming Tutorial, ( www.thenewboston.com/?cat=36&pOpen=tutorial ) ===============================================================================================================
20. 20/20 6.Teşekkürler. P rojenin devamlılığında yardımlarında ötürü, en başta proje yöneticisi Öğr. Gör. MUSTAFA M. BAYRAMGİL ’e, P roje raporunda deney düzeneklerinin tanıtılmasında katkılarından dolayı Uzm. AYATÇ ERKİŞİ ’ye, D eney verilerinin ve hesaplamarının kontrolünde katkılarından dolayı Yrd. Doç. Dr. Akın BACIOĞLU ’na teşekkür ederim.