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남부연합군의 패인론: 로버트 리의 지휘력과 군사전략을 중심으로
이주천 ( Lee Ju Cheon ) 한국미국사학회 2003 미국사연구 Vol.18 No.-
This study analyzes one of the important reasons why the Confederacy was finally conquered by the Union’s armed forces during the American Civil War. It concentrates on the generalship and military strategy of the most prominent Confederate general, Robert E. Lee. Lee’s military activity during the Civil War can be divided into three parts. The first period was from April 1861 to June 1, 1862, when General Lee reluctantly had to conduct a defensive strategy. The second period was from early June 1862 to July 4, 1863, when General Lee and his Army of Northern Virginia won a string of significant victories, notably the Seven Days battles, Second Manassas, Fredericksburg, and Chancellorsville, as part of an energetic offensive-defensive strategy. But his defeat at Gettysburg forced him to temper his boldness. The third period lasted from July 5, 1863 to April, 1865, when once again Lee’s strategy had to return to a defensive style, because of the lack of manpower and other war resources. He could not find a reasonable strategy to deter the Union’s forces. At critical times Lee was still eager to engage the Union armies directly because he assumed that the independence of the South could be obtained only by winning victories on the battlefields. He did not expect foreign intervention. But Lee’s dilemma was how to replace his heavy casualties as the South could not afford to provide sufficient material and manpower resources in support of Lee’s defensive-offensive strategy. General Lee’s extreme localism toward the Commonwealth of Virginia influenced his conduct of war and military strategy, because he was too concerned with the defense of Richmond and Virginia to realize the significance of the Western theaters until the final period of the war. In addition, Lee did not spend much energy to educate his general staff after the death of General Thomas J. “Stonewall” Jackson. He was too kind toward his subordinates on the battlefield, and gave them too much authority when his charismatic leadership was necessary. He did not succeed in managing his aides-de-camp effectively vis-a-vis the requirements of the modern warfare. Consequently, his military strategy and generalship remained in the old style of warfare. He did not encourage new patterns of warfare, rejecting the guerrilla war that the South could have offered by utilizing its mobile cavalry forces.
남북전쟁과 그랜트의 군사 지도력 -빅스버그 회전을 중심으로-
이주천 ( Ju Cheon Lee ) 한국서양사학회 2010 西洋史論 Vol.0 No.107
The article is a study on the Union General, Ulysses S. Grant, and his military leadership, especially focusing on his Vicksburg campaign of 1863. At the strategic level it was of vital importance to recognize the strategic value of the Western Theatre in the American Civil War. Like other historians, I hold the view that his Vicksburg campaign was the turning point in the American Civil War. Many historians agree that Grant`s Vicksburg campaign could be regarded as his masterpiece in his military career. The Vicksburg campaign was one of the most brilliant operations in the military history, because he had conducted it with excellent maneuvering and encirclement operations with few casualties. Thus, Grant`s western campaigns might prove significant as a study in the field of the American military history. How could Grant defeat the Southern Confederate armies and receive the unconditional surrender of General Pemberton? Grant avoided the frontal attacks to the strong defense of Vicksburg after his several attacks had failed. Late April 1983, he crossed the Mississippi River below the city and marched to Jackson and defeated Johnston`s army. Grant succeeded to divide the Confederate armies and completely disabled Johnston`s army to assist Pemberton`s army. Grant pushed Pemberton`s army into Vicksburg and finally encircled the city for seven weeks from the middle of May in order to avoid heavy casualties. Meanwhile, without the support of General Johnston`s army outside the city, Pemberton`s army was on the verge of starvation. On July 4, 1863, Pemberton had to surrender unconditionally with his thirty-one thousand soldiers. Grant`s strategic boldness on not concerning himself about the conventional supply line came from his bold character and unexpected imagination as he had discarded an old Jomini`s maxim that the advance of a massive army requires a full supply lines and communications. None of his subordinates had firm confidence in Grant`s bold campaign plan. Throughout his entire operations of the Vicksburg campaign, Grant could be able to demonstrated a command of complete unity while conducting his campaigns and leading his corps in spite of his personal conflicts with ambitious General McClernand. Consequently, the success of Grant`s Vicksburg campaign resulted in dividing the Confederate nation into two and deeply isolated the southern economy. The Lincoln administration finally found to mark U. Grant as Robert Lee`s rival and recognized him as a strong and able military leader who could end the civil war.
디지털 병리 대장암 분화도 예측을 위한 순서학습 기반 비전 트랜스포머 기술
이주천(Ju Cheon Lee),이재웅(Jae Ung Lee),Vuong Thi Le Trinh,Wang Jiamu,JiangKan,변근호(Keunho Byeon),정수민(sumin Jung),Anh Tien Nguyen,Bui Cao Doanh,곽진태(Jin Tae Kwak) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6
We propose a deep learning based digital pathology method that can classify colorectal cancers from digitized whole slide images. The conventional digital pathology methods approach cancer grading as a categorical classification problem, where the goal is to classify them into appropriate classes. However, in the case of cancer cells, the higher the grade or differentiation of each class, the poorer the condition of the cancer is, making simple categorical classification insufficient to address this issue. Therefore, in this paper, we formulate cancer grading as both categorical and ordinal classification problems and conduct two cancer grading tasks simultaneously. To achieve this, we build a deep learning model based on vision transformer and order learning. The proposed method is evaluated using a colorectal tissue dataset. Experimental results show that our method is able to accurately classify cancer grades and outperforms other competing models.