Texas A&M University – Corpus Christi
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Development and testing of a self-propelled machine for combined potato harvesting and residual plastic film retrieval
No full textA self-propelled machine for combined potato harvesting and residual plastic film retrieval is presented in this paper. The machine was designed collaboratively and built at the College of Mechano-Electronic Engineering of Gansu Agricultural University. It is intended for slow slope and horizontal terraces in hilly and mountainous areas of Northwest China, where regular-size harvesters cannot operate. The machine can realize the combined operations of potato digging, potato separation from soil and plastic film, potato collection and bagging, and residual plastic film retrieval. Through engineering analyses, the main systems of the machine were calculated, and their operating parameters were estimated. These include the digging and lifting device, the potato–plastic-film separation device, and the residual plastic film retrieval device. Field tests were performed at a 0.5 m/s driving speed of the machine, while the linear speed of the lifting chain of the digging and lifting device was 1.5 m/s, the tilting angle of the conveying chain of the potato and plastic film separation device was 50◦ , its linear speed was 0.6 m/s, and the linear speed of the lifting screen of the circulating lifting device was 0.7 m/s. With these settings, the average productivity of the machine was 0.12 ha/h. The loss rate, damage rate, and potato bruising rate were 1.8%, 1.4%, and 2.8%, respectively; the potato impurity rate was 3.6%; and the residual plastic film retrieval rate was 83%—all above industry standards. This research provides a solution to the problem of mechanized potato harvesting and plastic mulch retrieval on small, slopped plots of land in Northwest China and in other parts of the world where similar conditions exist.This research was funded by the Key Scientific and Technological Program of Gansu Province (22ZD6NA046), the Gansu Provincial University Industry Support Plan (2022CYZC-42), and the 2022 Gansu Province Excellent Graduate Student “Innovation Star” Project (2022CXZX-640)
12 Cognitive Psychology: Module 23
Get PDFModule 23: Decision Making
According to the different levels of consequences, each process of making a decision requires appropriate effort and various aspects to be considered. The following excerpt from the story about Perry makes this obvious: “After considering facts like the warm weather in Mexico and shirts and shorts being much more comfortable in this case (information gathering and likelihood estimation) Perry reasons that he needs them for his vacation. In consequence, he finally makes the decision to pack mainly shirts and shorts in his bag (final act of choosing).” Now it seems like there cannot be any decision making without previous reasoning, but that is not true. Of course, there are situations in which someone decides to do something spontaneously, with no time to reason about it. We will not go into detail here, but you might think about questions like "Why do we choose one or another option in that case?"
Bobby and Eddie Galvan at the Jazz Festival
No full textBobby and Eddie Galvan playing at the Jazz Festival on stag
Chapter 2 tutorial
No full textChapter 2: Formulas, Functions, and Formatting
This Microsoft® Excel® 365 text is developed to provide students with the basic skills on working with Excel 365. This book covers six chapters. Each chapter will be provided with the “Start File” and “Complete File”. The “Start File” will contain the data learners need to work with such chapter. Then, the learner will follow the demonstration in the slides/screenshot to learn the concepts covered in such chapter. Once the learner finish such chapter, the “Start File” will resemble the “Complete File.”
It is highly recommended that the learner practice with the project in each chapter 2-3 times. During the last practice, the learner should not need to consult the demonstration anymore. If the learner still need to look at the demonstration as a reference, it is an indication that additional practices are needed.
This book uses all Microsoft Excel screenshots under fair use. If you plan to redistribute our book, please consider whether your use is also fair use
Jeanne Stowers Wedding Dress
No full textJeanne Stowers smiling in her Wedding Dress for picture for the weddingof Jeanne Stowers and Ralph Glavan Jr
Alkane composition of the microlayer in Corpus Christi Bay: Implications of HAB formation
No full textShort-chain n-alkanes (n-pentadecane, n-heptadecane, and n-nonadecane) stem primarily from algae. Long-chain n-alkanes (n-heptacosane, n-noncosane, and n-hentriacontane) originate from terrigenous/land plants and are introduced to coastal waters by runoff. Since alkanes are hydrophobic compounds, they tend to concentrate in the microlayer (air-water interface). This study strives to ascertain the efficacy of using the aquatic-terrigenous ratio (ATR) as a precursor to harmful algal bloom (HAB) formation. Since the ATR is a new HAB parameter, it may further our understanding of HAB formation.
Corpus Christi Bay microlayer samples have been collected via the glass plate method. Although algal and terrigenous n-alkanes have been detected in these samples using a gas chromatography-mass spectrometry (GC-MS), they are present in lower concentrations than expected. As a result, new microlayer samples are currently being collected at larger volumes to increase their n-alkane concentrations. Once adequate concentrations have been achieved, ATRs will be calculated in order to establish a range in baseline values for Corpus Christi Bay. ATR values are expected to increase prior to and during HAB events.We thank the Welch Foundation for funding this research
11 Cognitive Psychology: Module 21
Get PDFModule 21: Problem Solving
Same place, different day. Perry is sitting at his desk again, staring at a blank document in front of him, while nervously playing with a pen in his right hand. Just a few hours left to hand in his essay, and he has not written a word. He rubs his fingers against his temple and mutters, "I need a plan!"
That thing Perry is confronted with is something many of us encounters in his daily life. He has a problem, and he does not really know how to solve it. But what exactly is a problem? Are there strategies to solve problems? These are just a few of the questions we want to answer in this chapter
Rafael Galvan Sr. as young man
No full textRafael Galvan, Sr. as young man posed staning behind a chai
Chapter 1 tutorial
Get PDFChapter 1: Creating a Worksheet and a Chart
This Microsoft® Excel® 365 text is developed to provide students with the basic skills on working with Excel 365. This book covers six chapters. Each chapter will be provided with the “Start File” and “Complete File”. The “Start File” will contain the data learners need to work with such chapter. Then, the learner will follow the demonstration in the slides/screenshot to learn the concepts covered in such chapter. Once the learner finish such chapter, the “Start File” will resemble the “Complete File.”
It is highly recommended that the learner practice with the project in each chapter 2-3 times. During the last practice, the learner should not need to consult the demonstration anymore. If the learner still need to look at the demonstration as a reference, it is an indication that additional practices are needed.
This book uses all Microsoft Excel screenshots under fair use. If you plan to redistribute our book, please consider whether your use is also fair use